Power distribution apparatus, charging device, energy storage device, and charging system

Abstract

Embodiments of the present application provide a power distribution apparatus, a charging device, an energy storage device, and a charging system. The power distribution apparatus comprises at least one power distribution unit, and each power distribution unit comprises at least one power supply port, a plurality of load ports, at least one connection port, and a switch matrix. Each power supply port is connected to a power module in the charging device, and each load port is connected to a load. The switch matrix is used for disconnecting or connecting any two of each power supply port, each load port, and each connection port. The at least one power distribution unit of the power distribution apparatus comprises a first power distribution unit, and one connection port of the first power distribution unit is connected to a power distribution unit of another charging device. According to the embodiments of the present application, the output power of the load ports of the power distribution apparatus can be flexibly adjusted to meet the charging demanded power of different loads.

Description

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

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on December 19, 2023, with application number 202311762462.2, and priority to the Chinese patent application entitled "Power distribution device, charging device, energy storage device and charging system", all contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of charging, and more particularly, to a power distribution device, a charging device, an energy storage device, and a charging system. Background Art

[0003] With the rapid adoption of new energy vehicles, the use of electric vehicle charging equipment as supporting facilities is becoming increasingly widespread. In current practical applications, different electric vehicles generally require different charging power levels from charging equipment. For example, as users' requirements for charging time increase, some electric vehicles are moving towards supercharging models, and accordingly, the charging power required from charging equipment is also increasing. Meanwhile, for ordinary electric vehicles, the required charging power from charging equipment is relatively low.

[0004] However, the power output mode of existing charging equipment is relatively fixed and cannot flexibly meet the charging power requirements of different electric vehicles. Summary of the Invention

[0005] The present application provides a power distribution device, and 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 connecting to the load to meet the charging power requirements of different loads.

[0006] In a first aspect, a power distribution device is provided, which is applied to a charging device, wherein the charging device includes a power module; the power distribution device includes at least one power distribution unit, each power distribution unit includes 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 the power module, each load port is used to connect to the load, and any two of each power port, each load port and each connection port are connected through 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, and one connection port of the first power distribution unit is used to connect to the power distribution unit of other charging devices to enable power transmission between the first power distribution unit and the power distribution unit of the other charging devices.

[0007] It is understood that when the 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.

[0008] In an embodiment of the present application, 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 predetermined connection port, thereby achieving power sharing between the power modules of different charging devices. Furthermore, in actual application, 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.

[0009] Furthermore, because 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 device to which the power distribution device belongs can be designed for low power. This helps reduce the design complexity and production cost of the charging device, and helps reduce the size of the charging device.

[0010] In combination with the first aspect, in certain 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 end of the DC-DC converter through the DC bus; the AC-DC converter is used to convert the AC power into a first DC power and then output it to the DC bus; the DC-DC converter is used to receive the first DC power through the DC bus, perform power conversion on the first DC power, and output it; the power port is used to connect to the output end of the DC-DC converter to receive the second DC power output by the DC-DC converter.

[0011] 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 predetermined connection port, thereby enabling power sharing between the AC-DC converters in different charging devices. This facilitates flexible adjustment of the output power of the load port of the first power distribution unit and facilitates the low-power design of the AC-DC converter in the charging device, thereby reducing the design complexity of the AC-DC converter, lowering the production cost of the charging device, and facilitating a reduction in the size of the charging device.

[0012] In combination with the first aspect, in certain implementations of the first aspect, the power distribution device also 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 through 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 direct current output by 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 other charging devices.

[0013] In the above technical solution, when the power distribution device is applied to a charging device, the connection port of the first power distribution unit can obtain the power output of the power distribution units of other charging devices, as well as the energy storage device and / or photovoltaic device through the power sharing bus, and transmit the obtained power to the load port. This is more conducive to increasing 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 power for the load.

[0014] In addition, if photovoltaic and storage are stacked on the DC bus in the power module, it is easy to cause the DC-DC converter connected to the downstream of the DC bus to be designed according to a higher power. In the embodiment of the present 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, which is more conducive to realizing a low-power design of the power module, especially more conducive to realizing a low-power design of the DC-DC converter connected to the downstream of the DC bus in the power module, thereby reducing the overall design complexity of the power module, reducing the production cost of the charging device, and helping to reduce the size of the charging device.

[0015] In combination with the first aspect, in certain implementations of the first aspect, at least one power distribution unit also includes a second power distribution unit, and 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.

[0016] It is understandable that when the power distribution device is applied to a charging device, all connection ports of the second power distribution unit are not connected to the power distribution units of other charging devices.

[0017] In the above technical solution, when the power distribution device is applied to the charging device, the first power distribution unit can transmit power to the power distribution unit of other charging devices through the set connection port, and can also transmit power to the second power distribution unit included in the power distribution device to which it belongs through the set connection port. Furthermore, in actual application, the connection port of the first power distribution unit can transmit the power output by the power distribution unit of other charging devices and the power output by the second power distribution unit in the power distribution device to the load port. This can not only flexibly adjust the output power of the load port of the first power distribution unit to meet the charging power requirements of different loads, but also improve the power utilization of the power module connected to the power distribution device.

[0018] In combination with the first aspect, in certain implementations of the first aspect, a connection port of the first power distribution unit is connected to another connection port of the first power distribution unit through 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 another connection port of the first power distribution unit.

[0019] In the above technical solution, when the power distribution device is applied to the charging device, the connection between the two connection ports of the first power distribution unit is turned on by the switch matrix, so that power can be transmitted between the second power distribution unit connected to the two connection ports and the power distribution units of other charging devices. As a result, even if the connection port of the second power distribution unit is not connected to the power distribution unit of other charging devices, the connection port of the second power distribution unit can still receive the power output by the power distribution unit 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 improve the flexibility of the power distribution device in outputting power to the load.

[0020] In combination with the first aspect, in certain implementations of the first aspect, the switch matrix of each power distribution unit includes a first switch unit and a second switch unit; each power port is connected to each connection port through the first switch unit and the second switch unit, each power port is connected to each load port through the first switch unit, and each connection port is connected to each load port through the second switch unit.

[0021] In the above technical solution, by connecting each power port of the power distribution unit to each load port through a first switch unit, and connecting each connection port to each load port through a second switch unit, the power port and connection port of the power distribution unit can transmit power to the load port independently and separately, thereby helping to improve the flexibility of the output power of each load port of the power distribution unit.

[0022] In combination with the first aspect, in certain implementations of the first aspect, the switch matrix of each power distribution unit also includes a third switch unit; two of the multiple power 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.

[0023] In the above technical solution, by connecting two power ports and / or two connection ports in the power distribution unit through the third switch unit, one power interface can be connected to each connection port and each load port of the power distribution unit using each switch in the switch matrix connected to the other power port, or one connection port can be connected to each power port and each load port of the power distribution unit using each switch in the switch matrix connected to the other connection port. This is conducive to improving the switch utilization rate in the switch matrix, reducing the number of switches required in the switch matrix, and thus reducing the volume and cost of the power distribution device.

[0024] In a second aspect, a charging device is provided, which includes a power module and a power distribution device; the power distribution device includes at least one power distribution unit, each power distribution unit includes at least one power port, multiple 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 the load, and any two of each power port, each load port and each connection port are connected through 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, and one connection port of the first power distribution unit is used to connect to the power distribution unit of other charging devices to enable power transmission between the first power distribution unit and the power distribution unit of the other charging devices.

[0025] In combination with the second aspect, in certain 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 end of the DC-DC converter through the DC bus, and the output end of the DC-DC converter is connected to each power port; the AC-DC converter is used to convert the AC power into a first DC power and then output it to the DC bus; the DC-DC converter is used to receive the first DC power through the DC bus, convert the first DC power into a second DC power, and output it to each power port.

[0026] In a third aspect, an energy storage device is provided, which includes multiple battery packs, a DC-DC conversion device and a power distribution device; the power distribution device includes at least one power distribution unit, each power distribution unit includes at least one power port, multiple load ports, at least one connection port and a switch matrix; the battery pack is connected to each power port through a DC-DC conversion device, 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 through a switch matrix; the DC-DC conversion device is used to convert the DC power output by the battery pack into power and output it to each power port, or to convert the DC power output by each power port into power and output it to the battery pack; 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, and one connection port of the first power distribution unit is used to connect to the power distribution unit of a charging device to enable power transmission between the first power distribution unit and the power distribution unit of the charging device.

[0027] 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. In the power distribution device of the energy storage device, the number of the first power distribution unit can be one or more.

[0028] In the above technical solution, the DC power output by the battery pack is transmitted through the DC-DC converter and then directly to the electric vehicle through the load port of the power distribution device, thereby enabling the energy storage device to charge the electric vehicle independently. This can improve the utilization rate of energy storage resources and help reduce the amount of power received from the power grid when the charging device is used to charge the electric vehicle, thereby reducing the cost of charging the electric vehicle.

[0029] 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 predetermined connection port, thereby achieving power sharing between the energy storage device and the charging device. Furthermore, in actual 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.

[0030] In a fourth aspect, a photovoltaic device is provided, which includes a photovoltaic component, a direct current (DC) to direct current (DC-DC) conversion device and a power distribution device; the power distribution device includes at least one power distribution unit, each power distribution unit includes at least one power port, multiple load ports, at least one connection port and a switch matrix; the photovoltaic component is connected to each power port through a DC-DC conversion device, 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 through a switch matrix; the DC-DC conversion device is used to convert the direct current output by the photovoltaic component and output it to each power port; 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, 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 is transmitted between the first power distribution unit and the power distribution unit of the charging device.

[0031] It is understood that in the power distribution device of the photovoltaic device, at least one connection port of the first power distribution unit is connected to the power distribution unit in the charging device. In the power distribution device of the photovoltaic device, the number of the first power distribution unit can be one or more.

[0032] In the above technical solution, the DC power output by the photovoltaic modules, after passing through the DC-DC converter, can be directly transmitted to the electric vehicle through the load port of the power distribution device, thereby enabling the photovoltaic device to charge the electric vehicle independently. This can improve the utilization rate of photovoltaic resources and help reduce the amount of power received from the grid when charging the electric vehicle using the charging device, thereby reducing the cost of charging the electric vehicle.

[0033] Furthermore, in the power distribution device of the photovoltaic device, the first power distribution unit can transmit power to the power distribution unit of the charging device through a predetermined connection port, thereby achieving power sharing between the photovoltaic device and the charging device. Furthermore, in actual application, 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.

[0034] In a fifth aspect, a charging system is provided, which includes multiple charging devices; the charging devices include a power module and a power distribution device, the power distribution device includes at least one power distribution unit, each power distribution unit includes at least one power port, multiple 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 the load, and any two of each power port, each load port and each connection port are connected through 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 one connection port of the first power distribution unit of one charging device is connected to one connection port of the first power distribution unit of another charging device to enable power transmission between the first power distribution unit of one charging device and the first power distribution unit of another charging device.

[0035] 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 designated connection port, thereby enabling power sharing among the power modules of different charging devices in the charging system. Furthermore, in actual applications, the connection port of the first power distribution unit of any charging device can transmit the power output by 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.

[0036] Furthermore, because 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 and production cost of the charging device, and helps reduce the size of the charging device.

[0037] In combination with the fifth aspect, in certain 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 end of the DC-DC converter through the DC bus, and the output end of the DC-DC converter is connected to each power port; the AC-DC converter is used to convert the AC power into a first DC power and then output it to the DC bus; the DC-DC converter is used to receive the first DC power through the DC bus, convert the first DC power into a second DC power, and output it to each power port.

[0038] In combination with the fifth aspect, in certain implementations of the fifth aspect, the charging system also includes at least one of an energy storage device and a photovoltaic device, and multiple power sharing busbars; 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 through a power sharing busbar; a power sharing busbar is used to collect the direct current output by at least one of the energy storage device and the photovoltaic device, and each power distribution unit of each charging device.

[0039] It can be understood 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 a first power distribution unit.

[0040] In the above technical solution, the connection port of any power distribution unit of any charging device in the charging system can obtain the power output of the power distribution units of other charging devices, as well as the energy storage device and / or photovoltaic device through the power sharing bus, and transmit the obtained power to the load port of any power distribution unit. This helps to increase the output power of the load port of any power distribution unit to meet the charging power requirements of different loads, and also improves the utilization rate of green resources such as photovoltaics and energy storage, providing more abundant power for the load.

[0041] For the beneficial effects not detailed in the second to fifth aspects, please refer to the beneficial effects of the first aspect mentioned above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] FIG1 is a schematic diagram of a charging system according to an embodiment of the present application.

[0043] 2 and 3 are schematic structural diagrams of the charging system shown in FIG1 .

[0044] FIG4 is a schematic structural diagram of a power distribution device provided in an embodiment of the present application.

[0045] FIG5 is a schematic structural diagram of a charging system provided in an embodiment of the present application.

[0046] FIG6 is a schematic structural diagram of another charging system provided in an embodiment of the present application.

[0047] FIG7 is a schematic structural diagram of a charging device provided in an embodiment of the present application.

[0048] FIG8 is a schematic structural diagram of a charging device provided in an embodiment of the present application.

[0049] FIG9 is a schematic structural diagram of another charging device provided in an embodiment of the present application.

[0050] FIG10 is a schematic structural diagram of another charging device provided in an embodiment of the present application.

[0051] 11 to 14 are schematic diagrams of the topological structure of a power distribution unit provided in an embodiment of the present application.

[0052] FIG15 is a schematic structural diagram of an energy storage device provided in an embodiment of the present application.

[0053] FIG16 is a schematic structural diagram of a photovoltaic device provided in an embodiment of the present application.

[0054] 17 to 19 are schematic structural diagrams of a charging system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] To facilitate understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0056] In the description of the embodiments of this application, "connection" may refer to an electrical connection, which can be understood as the transmission of signals between two electrical components through direct or indirect electrical connection. For example, when A and B are connected, it can be understood that A and B are directly electrically connected, or it can be understood that A and B are indirectly electrically connected through one or more other electrical components.

[0057] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may include one or more features, either explicitly or implicitly. In addition, in the description of the embodiments of the present application, "plurality" means two or more than two, and "at least one" and "one or more" mean one, two, or more than two.

[0058] In the embodiment of the present application, "and / or" is merely a way to describe the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0059] The technical solution in this application will be described below with reference to the accompanying drawings.

[0060] First, to facilitate understanding of the technical solutions provided by the embodiments of the present application, the following first introduces the application scenarios to which the embodiments of the present application are applicable.

[0061] FIG1 exemplarily shows a structural diagram of a charging system 100 provided in an embodiment of the present application.

[0062] Referring to Figure 1 , a charging system 100 may include a charging device 10 and an electric vehicle 20. The charging device 10 may be configured to receive AC power from an external power grid 200, convert the AC power into stable DC power, and then transmit the DC power to the electric vehicle 20 for charging. Alternatively, the electric vehicle 20 may also output power back to the external power grid 200 via the charging device 10.

[0063] The charging device 10 may include a charging host 11, at least one charging terminal 12, and at least one charging gun 13. In other words, the charging device 10 may be a split charging pile. The charging host 11 is connected to at least one charging terminal 12, which in turn is connected to at least one charging gun 13. Each charging gun 13 is used to connect to an electric vehicle 20. In practice, one charging terminal 12 may be connected to one or more charging guns 13.

[0064] The charging host 11 may include multiple power conversion devices that can convert AC power from the external power grid 200 into stable DC power and then transmit it to the charging terminal 12. The charging terminal 12 can transmit this stable DC power to the electric vehicle 20 via the connected charging gun 13 to charge the electric vehicle 20.

[0065] The charging terminal 12 may include a housing, a human-computer interaction interface, a charging control unit, a metering and billing unit, etc., and is used to perform information exchange, energy transmission, metering and billing, etc. with the electric vehicle 20.

[0066] The electric vehicle 20 is a vehicle that is powered by electricity. It can be a pure 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).

[0067] 2 and 3 exemplarily show connection structure diagrams of the charging system 100 shown in FIG. 1 .

[0068] 2 and 3 , the charging host 11 may include a power module 111 and a power distribution device 112 .

[0069] In some embodiments, referring to FIG2 , the power module 111 may include multiple alternating current-direct current (AC-DC) converters 1111 . The input ends of the multiple AC-DC converters 1111 are connected to the external power grid 200 , and the output ends of the multiple AC-DC converters 1111 are connected to the input end of the power distribution device 112 . The output end of the power distribution device 112 is connected to the charging gun 13 via the charging terminal 12 .

[0070] The multiple AC-DC converters 1111 are configured to receive alternating current (AC) from the external power grid 200, convert the AC power into DC power suitable for the electric vehicle 20, and transmit the DC power to the power distribution device 112. The power distribution device 112 is configured to dynamically distribute the DC power output by the multiple AC-DC converters 1111 according to the actual charging power required by the electric vehicle 20, transmit the distributed charging power to the charging terminal 12, and further transmit the distributed charging power to the electric vehicle 20 via the charging gun 13 connected to the charging terminal 12, thereby charging the electric vehicle 20.

[0071] 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 ends of the multiple AC-DC converters 1111 are connected to the external power grid 200, the output ends of the multiple AC-DC converters 1111 are connected to the input ends of the multiple DC-DC converters 1112 via the DC bus 1113, and the output ends of the multiple DC-DC converters 1112 are connected to the input end of the power distribution device 112. The output end of the power distribution device 112 is connected to the charging gun 13 via the charging terminal 12.

[0072] Among them, multiple AC-DC conversion devices 1111 are used to receive alternating current from the external power grid 200, convert the alternating current into direct current, and then transmit it to the direct current bus 1113. That is, the direct current bus 1113 can collect the first direct current output by the multiple AC-DC conversion devices 1111. Multiple DC-DC conversion devices 1112 are used to receive the direct current output by the multiple AC-DC conversion devices 1111 through the direct current bus 1113, and further convert the direct current into direct current suitable for the electric vehicle 20 before transmitting it to the power distribution device 112. The power distribution device 112 is used to dynamically distribute the direct current output by the multiple DC-DC conversion devices 1112 according to the actual charging power required by the electric vehicle 20, and transmit the distributed charging power to the charging terminal 12, and further transmit it to the electric vehicle 20 through the charging gun 13 connected to the charging terminal 12, so as to charge the electric vehicle 20.

[0073] FIG4 is a schematic structural diagram of an example of a power distribution device 112 connected to multiple DC-DC conversion devices 1112 shown in FIG3 , provided by an embodiment of the present application.

[0074] Referring to Figure 4, the power distribution device 112 includes a plurality of power distribution units 1121, each power distribution unit 1121 includes an input end and a plurality of output ends, and the input end of each power distribution unit 1121 is connected to the plurality of output ends through a group of switching devices. Among them, the input ends of the plurality of power distribution units 1121 serve as the plurality of output ends of the power distribution device 112, and are used to be connected one-to-one with the output ends of the plurality of DC-DC conversion devices 1112. One output end of each power distribution unit 1121 in the plurality of power distribution units 1121 is connected to form a plurality of output ends of the power distribution device 112, that is, output end 1, output end 2...output end n. In a specific implementation, the plurality of output ends of the power distribution device 112 are connected one-to-one with the plurality of charging guns 13 for connection with the electric vehicle 20.

[0075] As described in the background technology section above, in current practical applications, different electric vehicles 20 generally require different charging powers from the charging device 10. For example, for a supercharger-type electric vehicle 20, the charging power required from the charging device 10 is relatively high, that is, the power output from the output end of the power distribution device 112 is relatively high. For a standard-type electric vehicle 20, the charging power required from the charging device 10 is relatively low, that is, the power output from the output end of the power distribution device 112 is relatively low.

[0076] Since the output power of the output end of the power distribution device 112 mostly depends on the power of the power module 111, and the current design of the power module 111 is relatively fixed, the way the output power of the output end of the power distribution device 112 is also relatively fixed. For example, in order to meet the high-power supercharging requirements of the supercharging electric vehicle 20, the power module 111 is often directly designed according to high power. Accordingly, the power output of the output end of the power distribution device 112 is usually large. If the high-power designed power module 111 is directly used to charge the ordinary electric vehicle 20 through the power distribution device 112, it is easy to cause a waste of power resources. In addition, the high-power power module 111 is usually expensive and large in size. In special scenarios such as parking lots, there are problems such as limited installation space and insufficient installation flexibility. Alternatively, in order to meet the low-power charging requirements of the ordinary electric vehicle 20, such as fast charging requirements, the power module 111 is often directly designed according to low power. Accordingly, the output power of the output end of the power distribution device 112 is relatively small. If the low-power power module 111 is directly used to charge the supercharging electric vehicle 20 through the power distribution device 112 , the high-power supercharging requirement of the electric vehicle may not be met.

[0077] Therefore, how to flexibly meet the charging power requirements of different electric vehicles is an urgent problem that needs to be solved.

[0078] Based on the above content, an embodiment of the present application provides a power distribution device, and 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 connecting to the load to meet the charging power requirements of different loads.

[0079] The power distribution device, charging device, energy storage device and charging system provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0080] FIG5 is a schematic structural diagram of a charging system 300 provided in an embodiment of the present application.

[0081] 5 , the charging system 300 may include a plurality of charging devices 400 . Each charging device 400 includes a power module 410 and a power distribution device 420 .

[0082] 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.

[0083] It is understood that in the embodiment of the present application, the power module 410 can provide the DC power required for charging, and the power module 410 can be, for example, the power module 111 shown in Figure 2 or Figure 3. The load can be, for example, the electric vehicle 20 shown in Figure 1.

[0084] It can also be understood that in the embodiment of the present application, each connection port 4213 of the power distribution unit 421 can be used to connect an external device other than the power distribution unit 421 to which it belongs that is capable of providing and receiving DC power. For example, each connection port 4213 of the power distribution unit 421 can be used to connect to a connection port 4213 of a power distribution unit 421 in another charging device 400 other than the charging device 400 to which it belongs. Alternatively, each connection port 4213 of the power distribution unit 421 can also be used to connect to a connection port 4213 of another power distribution unit 421 included in the power distribution device 420 to which it belongs. Furthermore, each connection port 4213 of the power distribution unit 421 can receive DC power output by a connected external device, or output DC power to a connected external device.

[0085] In a specific implementation, each power port 4211 of the power distribution unit 421 can be used to receive the DC power output by 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 the 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 by the power port 4211 to a connected external device, or to receive DC power output by 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.

[0086] Continuing with FIG5 , in each charging device 400 of the charging system 300, at least one power distribution unit 421 of the power distribution apparatus 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 4213 of the first power distribution unit 421a of another charging device 400, enabling power transfer between the first power distribution units 421a of the two charging devices 400.

[0087] It is understood that in the embodiment of the present application, at least one connection port 4213 of the first power distribution unit 421a is connected to the power distribution unit of other charging devices other than the corresponding charging device 400. The number of the first power distribution units 421a in the power distribution device 420 can be one or more.

[0088] 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 transmit power to the first power distribution unit 421a of the other charging device 400.

[0089] For example, taking the charging system 300 shown in Figure 5 as including two charging devices 400 (i.e., charging device 400a and charging device 400b), the power distribution devices 420 of charging device 400a and charging device 400b respectively include a first power distribution unit 421a, and the first power distribution unit 421a includes a connection port 4213. The connection port 4213 of the first power distribution unit 421a in the charging device 400a is connected to the connection port 4213 of the first power distribution unit 421a in the charging device 400b to form 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.

[0090] Therefore, power can be transmitted between the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b 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.

[0091] 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 requirement of the electric vehicle, that is, the power currently output by the power module 410 of the charging device 400a through the load port 4214 meets the charging power requirement 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.

[0092] If the current output power of the load port 4214 is less than the charging power requirement of the electric vehicle, that is, the power currently output by the power module 410 of the charging device 400a through the load port 4214 cannot meet the charging power requirement of 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.

[0093] Specifically, the power output by the power module 410 of the charging device 400b can be transmitted to the connection port 4213 of the first power unit 421a in the charging device 400b. 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 the charging device 400a to the load port 4214 connected to the electric vehicle via the switch matrix 4212, but can 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 via the switch matrix 4212. That is, the first power distribution unit 421a of the charging device 400a can simultaneously transmit the power output by 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 requirement of the electric vehicle.

[0094] In the charging system 300 provided in the embodiment of the present application, 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 via a provided connection port 4213. Thus, the first power distribution unit 421a of any charging device 400 can transmit power between the connection ports 4213 of the first power distribution units 421a in other charging devices 400, thereby achieving power sharing between the power modules 410 of different charging devices 400. Furthermore, in actual application, the connection port 4213 of the first power distribution unit 421a in any charging device 400 can transmit the power output by the first power distribution unit 421a in 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 in any charging device 400 to meet the charging power requirements of different loads.

[0095] For example, when the charging system 300 is used in a fully liquid-cooled supercharging station, the first power distribution unit 421a in any charging device 400 can transmit the power output from the connection port 4213 of the first power distribution unit 421a in multiple other charging devices 400 to the load port 4214 via the provided connection port 4213, thereby increasing the power output from the load port 4214 to the electric vehicle, thereby helping to meet the demand for high-power supercharging of electric vehicles. This is conducive to achieving a charging speed of one kilometer per second, that is, it is conducive to charging an electric vehicle with electricity for one kilometer in one second, giving users a "cup of coffee, fully charged" charging experience.

[0096] It is understood that when the charging system 300 is used in a fully liquid-cooled supercharging station, the charging host, charging terminal, and charging gun in each charging device 400 in the charging system 300 are all liquid-cooled for heat dissipation, and the maximum output power of each charging gun of each charging device 400 is greater than or equal to a preset power threshold. The preset power threshold can be 250 kW, for example.

[0097] In addition, 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 provided connection port 4213, the power module 410 of each charging device 400 in the charging system 300 can be designed according to low power.

[0098] In actual application, when charging a low-power electric vehicle, the first power distribution unit 421a can only transmit the power output by the power module 410 in the corresponding 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 by the power module 410 in the corresponding charging device 400 and the power output by the first power distribution unit 421a in other charging devices 400 received by the connection port 4213 to the load port 4214 to increase the output power of the load port 4214, thereby facilitating the charging needs of the high-power electric vehicle, such as supercharging needs.

[0099] In the above technical solution, compared with designing the power module 410 for high power, designing the power module 410 for low power 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 volume of the charging device 400.

[0100] FIG6 is a schematic structural diagram of another charging system 300 provided in an embodiment of the present application.

[0101] Referring to FIG. 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 of the DC-DC converter 412 via the DC bus 413, and the output 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 is configured to convert AC power into a first DC power and output it to the DC bus 413. The DC-DC converter 412 is configured to receive the first DC power via the DC bus 413, convert the first DC power into a second DC power, and output it to the connected power port 4211.

[0102] It is understood that the number of the AC-DC converter 411 and the DC-DC converter 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 a DC-DC converter 412.

[0103] 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 one AC-DC converter 411 .

[0104] For detailed descriptions of the AC-DC converter 411 , the DC-DC converter 412 and the DC bus 413 in the power module 410 , please refer to the embodiments shown in FIG. 2 and FIG. 3 , which will not be repeated here.

[0105] Continuing with FIG6 , 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 each be connected to a connection port 4213 of a power distribution unit 421 in any charging device 400, so that power can be transferred between the energy storage device 500 and the photovoltaic device 600 and the power distribution unit 421 of any connected charging device 400.

[0106] In a specific 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 can be connected to the connection port 4213 of the power distribution unit 421 of different charging devices 400 in the charging system 300.

[0107] For example, taking the charging system 300 shown in Figure 6 as including two charging devices 400 (i.e., charging device 400a and charging device 400b), a storage device 500 and a photovoltaic device 600, the power distribution devices 420 of the charging devices 400a and 400b respectively include a first power distribution unit 421a, and the first power distribution unit 421a includes two connection ports 4213. For example, a connection port 4213 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. 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 as to form three power sharing transmission lines between the first power distribution unit 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.

[0108] Therefore, power can be transmitted between the first power distribution unit 421a of the charging device 400a, the first power distribution unit 421a of the charging device 400b, the energy storage device 500 and the photovoltaic device 600 through the above-mentioned 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, the power module 410 connected to the first power distribution unit 421a of the charging device 400b, the energy storage device 500 and the photovoltaic device 600.

[0109] 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 by 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 by the energy storage device 500 received at another connection port 4213 to the load port 4214. In this way, the output power of the load port 4214 can be increased to meet the charging power required by the electric vehicle.

[0110] 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. In this way, the output power of the load port 4214 can be increased to meet the charging power required by the electric vehicle.

[0111] In the charging system 300 provided in the embodiment of the present application, the connection port 4213 of the first power distribution unit 421a of any charging device 400 can transmit the power output by the power distribution unit 421 of another charging device 400 to the load port 4213, and can also transmit the power output by the energy storage device 500 and / or the photovoltaic device 600 to the load port 4213. This not only enables 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 electric energy for the load.

[0112] 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, that is, if photovoltaic and energy storage are stacked on the DC bus 413 of the power module 410, although the DC power collected by the DC bus 413 can be increased, the DC power received by the downstream DC-DC converter 412 through the DC bus can be increased, thereby increasing the output power of the DC-DC converter 412 output through the load port 421. However, since the total rated output power of the DC-DC converter 412 in the power module 410 is generally required 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 generally needs to be designed with a larger power pool.

[0113] In the embodiment of the present application, 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 of the power distribution unit 421. Thus, while increasing the output power of the load port 4214, it is also more conducive to achieving a low-power design for the power module 410, and in particular, more conducive to achieving a low-power design for the DC-DC converter 412 in the power module 410, thereby reducing the overall design complexity of the power module 410, helping to reduce the production cost of the charging device 400, and reducing the size of the charging device 400.

[0114] The following uses the charging device 400a in the charging system 300 as an example to further describe the charging device 400 and the power distribution device 420 in the charging device 400 provided in the embodiment of the present application. It should be understood that the following description of the charging device 400a is applicable to any charging device 400 in the charging system 300.

[0115] FIG7 and FIG8 are schematic structural diagrams of a charging device 400a provided in an embodiment of the present application.

[0116] 7 and 8 , the charging device 400 a may include a power module 410 and a power distribution device 420 .

[0117] 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 the 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 any two of each power port 4211, each connection port 423, and each load port 424.

[0118] In which, at least one power distribution unit 421 in the power distribution device 420 includes a first power distribution unit 421a, and 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, a connection port 4213 for connecting to the first power distribution unit 421a in the charging device 400b shown in Figure 5, so as to enable power transmission between the first power distribution unit 421a and the power distribution units of other charging devices.

[0119] It is understandable that the number of the first power distribution units 421a in the power distribution device 420 can be one or more. The multiple first power distribution units 421a can be connected through the connection ports 4213 respectively provided.

[0120] For example, in some embodiments, as shown in FIG7 , the power distribution device 420 of the charging device 400a includes a first power distribution unit 421a, and the first power distribution unit 421a includes two connection ports 4213. For example, the two connection ports 4213 can be connected one-to-one with the two connection ports 4213 of the first power distribution unit 421a of the charging device 400b shown in FIG5 , 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] In other embodiments, as shown in FIG8 , 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. For example, one connection port 4213 of each of the two first power distribution units 421a is connected, and the other connection port 4213 of each of the two power distribution units 421a can be connected one-to-one with the two connection ports 4213 of the first power distribution unit 421a in the charging device 400b shown in FIG5 , 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.

[0122] Therefore, power can be transmitted between the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b through the above-mentioned 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.

[0123] For the description of power transmission between the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421b of the charging device 400b, please refer to the embodiments shown in Figures 5 and 6 above, and will not be repeated here.

[0124] In the charging device 400a provided in the embodiment of the present application, the first power distribution unit 421a of the power distribution device 420 can transmit power to the power distribution units of other charging devices via the provided connection port 4213, thereby achieving power sharing between the power module 410 of the charging device 400a and the power modules of other charging devices. Furthermore, in actual application, the connection port 4213 of the first power distribution unit 421a can transmit the power output by the power distribution units 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.

[0125] In addition, 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 set connection port 4213, the power module 410 connected to the power distribution device 420 in the charging device 400a can be designed according to low power, which is beneficial to reducing the design complexity of the charging device 400a, reducing the production cost of the charging device 400a, and reducing the volume of the charging device 400a.

[0126] FIG9 is a schematic structural diagram of another charging device 400 a provided in an embodiment of the present application.

[0127] Referring to FIG. 9 , unlike the embodiments shown in FIG. 7 and FIG. 8 , in charging device 400a, at least one power distribution unit 421 of power distribution apparatus 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.

[0128] One connection port 4213a1 of the first power distribution unit 421a is used to connect to the power distribution unit of another charging device, for example, it is used to connect to the connection port 4213 of the first power distribution unit 421a in the charging device 400b shown in Figure 6. 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. As a result, the first power distribution unit 421a can transmit power to the power distribution unit of another charging device as well as to the second power distribution unit 421b.

[0129] It can be understood that, in the embodiment of the present application, all the connection ports 4213 of the second power distribution unit 421 b are not connected to the power distribution units of other charging devices other than the corresponding charging device 400 a .

[0130] For example, each connection port 4213 in the second power distribution unit 421b can be connected to the connection port 4213 of other power distribution units 421 included in the power distribution device 420 to which it belongs; or, a part 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 to which it belongs, and another part of the connection ports 4213 are used to connect energy storage equipment and / or photovoltaic equipment.

[0131] 9 exemplarily shows that a connection port 4213b1 of the second power distribution unit 421b is connected to another connection port 4213a2 of the first power distribution unit 421a, and another connection port 4213b2 of the second power distribution unit 421b is used to connect an energy storage device and a photovoltaic device, for example, for connecting the energy storage device 500 and the photovoltaic device 600 shown in FIG. 6 .

[0132] 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.

[0133] For example, as shown in FIG9 , 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 a connection port 4213 of the first power distribution unit 421a in the charging device 400b shown in FIG6 through the power sharing bus 422a. 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 through the power sharing bus 422b. Another connection port 4213b2 of the second power distribution unit 421b is connected to the energy storage device 500 and the photovoltaic device 600 shown in FIG6 through the power sharing bus 422c.

[0134] Thus, the first power distribution unit 421a of the charging device 400a can transmit power to the first power distribution unit 421a of the charging device 400b via the power sharing bus 422a, thereby enabling power sharing between the power modules 410 of the charging device 400a and the power modules 410 of the charging device 400b. Furthermore, the first power distribution unit 421a of the charging device 400a can also transmit power to the second power distribution unit 421b of the charging device 400a via the power sharing bus 422b, thereby enabling power sharing between different power distribution units 421 within the same power distribution device 420.

[0135] 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 to achieve 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.

[0136] 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 a 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.

[0137] In this way, the output power of the load port 4214 can be increased to meet the charging power requirement of the electric vehicle, and the utilization rate of the DC-DC converter 412 connected to the second power distribution unit 421b in the charging device 400a can be improved, which is beneficial to improving the overall utilization rate of the power module 410 in the charging device 400a.

[0138] 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 by the energy storage device 500 and the photovoltaic device 600 received by another connection port 4213b2 to the load port 4214, but also transmit the power output by the first power distribution unit 421a received by a connection port 4213b1 to the load port 4214.

[0139] In this way, the output power of the load port 4214 can be increased to meet the charging power requirement of the electric vehicle, and the utilization rate of the DC-DC conversion device 412 connected to the first power distribution unit 421a in the charging device 400a can be improved, which is beneficial to improving the overall utilization rate of the power module 410 in the charging device 400a.

[0140] It is understood that the above embodiment is described as a power distribution device 420 including a first power distribution unit 421a and a second power distribution unit 421b. In the embodiment of the present application, the number of the first power distribution unit 421a and the second power distribution unit 421b in the power distribution device 420 can be one or more, and the number of the connection ports 4213 in the first power distribution unit 421a and the second power distribution unit 421b can also be one or more.

[0141] In the charging device 400a provided in the embodiment of the present application, 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 the power distribution device 420 to which it belongs. Furthermore, in actual application, the connection port 4213 of the first power distribution unit 421a can transmit the power output by the power distribution units in other charging devices and the power output by the second power distribution unit 421b in the power distribution device 420 to which it belongs to, to the load port 4214. This can flexibly adjust 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 can also improve the overall utilization rate of the power module 410 connected to the power distribution device 420.

[0142] Furthermore, in some examples, with continued reference to FIG9 , 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 an energy storage device and / or a photovoltaic device, such as the energy storage device 500 and the photovoltaic device 600 shown in FIG6 . The power sharing bus 422a can be used to aggregate the power output by the first power distribution unit 421a of the charging device 400a and the first power distribution unit 421a of the charging device 400b, as well as the power output by the energy storage device 500 and the photovoltaic device 600, thereby forming a larger power pool on the power sharing bus 422a.

[0143] In actual application, 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 being more conducive to improving the output power of the load port 4214 of the first power distribution unit 421a to better meet the charging power requirements of different loads.

[0144] 9 , in 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 may also be connected via 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.

[0145] When the switch matrix 4212 conducts the connection between the one connection port 4213a1 and the other connection port 4213a2, power can also be transmitted between the power distribution unit of the other 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 conducts the connection between the one connection port 4213a1 and the other connection port 4213a2, the one connection port 4213a1 of the first power distribution unit 421a can transmit the power output by the first power distribution unit 421a of the charging device 400b to the other connection port 4213a2, and then transmit the power to the one connection port 4213b1 of the second power distribution unit 421b through the other connection port 4213a2.

[0146] Thus, one connection port 4213b1 of the second power distribution unit 421b can transmit the power output by the first power distribution unit 421a of the charging device 400a connected to the one connection port 4213b1 to the load port 4214, and can also transmit the power output by the first power distribution unit 421a of the charging device 400b not connected to the one connection port 4213b1 to the load port 4214. This helps to increase the output power of the load port 4214 of the second power distribution unit 421b, thereby helping to increase 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.

[0147] 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 through a switch matrix 4212 so that power transmission can be performed between any two connection ports 4213 of each power distribution unit 421.

[0148] The structure of the power distribution device 420 in the charging device 400a has been described above in conjunction with the accompanying drawings. Below, taking the first power distribution unit 421a in the charging device 400a shown in FIG9 as an example, the specific topology of the switch matrix 4212 in the power distribution unit 421 provided in the embodiment of the present application is exemplified. It should be understood that the following description of the switch matrix 4212 in the first power distribution unit 421a is applicable to any power distribution unit 421 in any charging device 400 in the charging system 300.

[0149] FIG10 is a schematic diagram of a topological structure of a power distribution unit 421 a provided in an embodiment of the present application.

[0150] 10 , the switch matrix 4212 of the first power distribution unit 421 a 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.

[0151] In the first power distribution unit 421a, each power port 4211 is connected to each connection port 4213 through the first switch unit SU1, each power port 4211 is connected to each load port 4214 through the second switch unit SU2, and each connection port 4213 is connected to each load port 4214 through the first switch unit SU1 and the second switch unit SU2.

[0152] Specifically, taking the first power distribution unit 421a including two power ports 4211 (i.e., power ports 4211a1, 4211a2), two connection ports 4213 (i.e., connection ports 4213a1, 4213a2) and two load ports 4214 (i.e., load ports 4213a1, 4213a2) as an example, the first switch unit SU1 includes four first switches (i.e., first switches S11, S12, S13, S14), and the second switch unit SU2 includes four second switches (i.e., second switches S21, S22, S23, S24).

[0153] The power port 4211a1 is connected to the connection port 4213a1 via the first switch S11, and to the load port 4214a1 via the second switch S21, and so on. The connection port 4213a1 can be connected to the load port 4214a1 via the first switch S11 and the second switch S21, or to the load port 4214a1 via the first switch S13 and the second switch S23, and so on.

[0154] In addition, the connection port 4213a1 can be connected to the connection port 4213a2 through the first switch S12 or can be connected to the connection port 4213a2 through the first switch S14.

[0155] In a specific implementation, referring to Figures 9 and 10, taking the example of connecting the load port 4214a1 of the first power distribution unit 421a to an electric vehicle and charging the electric vehicle, the second switch S21 and the second switch S23 are closed to conduct 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 output of the power module 410 received by the power port 4211a1 is transmitted to the load port 4214a1 through the second switch S21, and the power output of the power module 410 received by the power port 4211a2 is transmitted to the load port 4214a1 through the second switch S23, thereby charging the electric vehicle.

[0156] If the output power transmitted from power port 4211a1 and power port 4211a2 to load port 4214a1 is less than the required charging power of the electric vehicle, first switch S11 is closed to establish a connection between connection port 4213a1 and load port 4214a1. In this case, the power output from first power distribution unit 421a in charging device 400b received at connection port 4213a1 can be sequentially transmitted to load port 4214a1 via first switch S11 and second switch S21, thereby increasing the output power of load port 4214a1 to meet the required charging power of the electric vehicle.

[0157] FIG11 is a schematic diagram of a topological structure of another example of a power distribution unit 421 a provided in an embodiment of the present application.

[0158] Referring to Figure 11, different from the embodiment shown in Figure 10, in the embodiment shown in Figure 11, the switch matrix 4212 of the first power distribution unit 421a includes not only the first switch unit SU1 and the second switch unit SU2, but also a third switch unit SU3, and the third switch unit SU3 includes at least one third switch.

[0159] In the first power distribution unit 421a, two power ports 4211 among the multiple power ports 4211 can be connected through the third switch unit SU3, so that one power port 4211 of the two power ports 4211 can be switched to the other power port 4211 through the third switch unit SU3, thereby utilizing each switch in the switch matrix 4212 connected to the other power port 4211 to connect to each connection port 4213 and each load port 4214.

[0160] Specifically, continuing to take the first power distribution unit 421a including power ports 4211a1, 4211a2, connection ports 4213a1, 4213a2, and load ports 4213a1, 4213a2 as an example, the first switch unit SU1 includes two first switches (i.e., first switches S11, S14), the second switch unit SU2 includes two second switches (i.e., second switches S21, S22), and the third switch unit SU3 includes a third switch (i.e., third switch S31).

[0161] The power port 4211a1 is connected to the connection port 4213a1 via the first switch S11, and to the load port 4214a1 via the second switch S21. Since the power port 4211a2 is connected to the power port 4211a1 via the third switch S31, the power port 4211a2 can be switched to the power port 4211a1 via the third switch S31, and then connected to the connection port 4213a1 via the first switch S11 connected to the power port 4211a1, and connected to the load port 4214a1 via the second switch S21 connected to the power port 4211a1, and so on.

[0162] Accordingly, the connection port 4213a1 can be connected to the load port 4214a1 through the first switch S11 and the second switch S21, the connection port 4213a2 can be connected to the load port 4214a1 through the first switch S14, the third switch S31 and the second switch S21, and so on.

[0163] In a specific implementation, referring to Figures 9 and 11 , and continuing to take the example of connecting the load port 4214a1 of the first power distribution unit 421a to an electric vehicle and charging the electric vehicle, the second switch S21 and the third switch S31 are closed to conduct 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 outputted by the power module 410 received by the power port 4211a1 is transmitted to the load port 4214a1 via the second switch S21, and the power outputted by the power module 410 received by the power port 4211a2 is transmitted to the load port 4214a1 via the third switch S31 and the second switch S21, thereby charging the electric vehicle.

[0164] When the output power transmitted from power port 4211a1 and power port 4211a2 to load port 4214a1 is less than the required charging power of the electric vehicle, first switch S11 is closed to establish a connection between connection port 4213a1 and load port 4214a1. In this case, the power output from first power distribution unit 421a in charging device 400b received at connection port 4213a1 can be sequentially transmitted to load port 4214a1 via first switch S11 and second switch S21, thereby increasing the output power of load port 4214a1 to meet the required charging power of the electric vehicle.

[0165] It is understood that the above embodiment is described by taking the example of the first power distribution unit 421a including two power ports 4211. In other embodiments, the first power distribution unit 421a may include three or more power ports 4211, and any two power ports 4211 may be connected via the third switch unit SU3.

[0166] In the embodiment of the present application, compared to the embodiment shown in FIG10 , in which 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 the third switch S31 to connect the power port 4211a2 and the power port 4211a2 of the first power distribution unit 421a. This reduces the number of switches in the first switch unit SU1 and the second switch unit SU2, while enabling connection between the power port 4211a1 and the power port 4211a2 and each connection port 4213 of the first power distribution unit 421a and each load port 4214. Furthermore, this helps improve the switch utilization rate in the switch matrix 4212, reduces the number of switches required in the switch matrix 4212, and thereby reduces the size and cost of the first power distribution unit 421a.

[0167] FIG12 is a schematic diagram of the topological structure of another example of a power distribution unit 421 provided in an embodiment of the present application.

[0168] 12 , in some embodiments, the switch matrix 4212 of the first power distribution unit 421 a may include a first switch unit SU1 and a second switch unit SU2 , where the first switch unit SU1 includes a plurality of first switches, and the second switch unit SU2 includes a plurality of second switches.

[0169] In the first power distribution unit 421a, each power port 4211 is connected to each connection port 4213 through the first switch unit SU1 and the 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.

[0170] Specifically, continuing to take the example of the first power distribution unit 421a including two power ports 4211 (i.e., power ports 4211a1, 4211a2), two connection ports 4213 (i.e., connection ports 4213a1, 4213a2) and two load ports 4214 (i.e., load ports 4213a1, 4213a2), the first switch unit SU1 includes four first switches (i.e., first switches S11, S12, S13, S14), and the second switch unit SU2 includes four second switches (i.e., second switches S21, S22, S23, S24).

[0171] The power port 4211a1 is connected to the load port 4214a1 via the first switch S11, the connection port 4213a1 is connected to the load port 4214a1 via the second switch S21, and so on. Furthermore, the power port 4211a1 can be connected to the connection port 4213a1 via the first switch S11 and the second switch S21, or to the connection port 4213a1 via the first switch S12 and the second switch S22, and so on.

[0172] In addition, the connection port 4213a1 may be connected to the connection port 4213a2 via the second switch S21 and the second switch S23, or may be connected to the connection port 4213a2 via the second switch S22 and the second switch S24.

[0173] In a specific implementation, referring to Figures 9 and 12 , and continuing to take the example of connecting the load port 4214a1 of the first power distribution unit 421a to an electric vehicle and charging the electric vehicle, the first switch S11 and the first switch S13 are closed to conduct 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 outputted by the power module 410 received by the power port 4211a1 is transmitted to the load port 4214a1 via the first switch S11, and the power outputted by the power module 410 received by the power port 4211a2 is transmitted to the load port 4214a1 via the first switch S13, thereby charging the electric vehicle.

[0174] When the output power transmitted from power port 4211a1 and power port 4211a2 to load port 4214a1 is less than the required charging power of the electric vehicle, the second switch S21 is closed to establish a connection between connection port 4213a1 and load port 4214a1. In this case, the power output from first power distribution unit 421a in charging device 400b, received at connection port 4213a1, can be transmitted to load port 4214a1 via the second switch S21, thereby increasing the output power of load port 4214a1 to meet the required charging power of the electric vehicle.

[0175] In the embodiment of the present application, each power port 4211 of the first power distribution unit 421a is connected to each load port 4214 via the first switch unit SU1, and each connection port 4213 is connected to each load port 4214 via the second switch unit SU2. Thus, the connection port 4213 and the power port 4211 of the first power distribution unit 421a can independently transmit power to the load port 4214.

[0176] For example, in one possible scenario, the connection port 4213a1 of the first power distribution unit 421a can transmit the power output by 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 by the power module 410 to the load port 4214a2. In other words, the load port 4214a1 can only output the power shared by the power distribution units of other charging devices, thereby facilitating greater flexibility in the power output of the load port 4214 of the first power distribution unit 421a.

[0177] FIG13 is a schematic diagram of the topological structure of another example of a power distribution unit 421 provided in an embodiment of the present application.

[0178] Referring to Figure 13, continuing to take the first power distribution unit 421a in the power distribution device 420 of the charging device 400a shown in Figure 9 as an example, different from the embodiment shown in Figure 12, in the embodiment shown in Figure 13, the switch matrix 4212 of the first power distribution unit 421a includes, in addition to the first switch unit SU1 and the second switch unit SU2, a third switch unit SU3, and the third switch unit SU3 includes at least one third switch.

[0179] In the first power distribution unit 421a, two power ports 4211 among the plurality of power ports 4211 may be connected via the third switch unit SU3, and / or two connection ports 4213 among the plurality of connection ports 4213 in the first power distribution unit 421a may be connected via the third switch unit SU3. Thus, one of the two power ports 4211 may be switched to the other power port 4211 via the third switch unit SU3, thereby connecting the other power port 4211 to each connection port 4213 and each load port 4214 via each switch in the switch matrix 4212. Alternatively, one of the two connection ports 4213 may be switched to the other connection port 4213 via the third switch unit SU3, thereby connecting the other connection port 4213 to each power port 4211 and each load port 4214 via each switch in the switch matrix 4212.

[0180] Specifically, continuing to take the first power distribution unit 421a including power ports 4211a1, 4211a2, connection ports 4213a1, 4213a2, and load ports 4213a1, 4213a2 as an example, the first switch unit SU1 includes two first switches (i.e., first switches S11, S12), the second switch unit SU2 includes two second switches (i.e., second switches S21, S22), and the third switch unit U3 includes two third switches (i.e., third switch S31 and third switch S32).

[0181] The power port 4211a1 is connected to the load port 4214a1 via a first switch S11, and the connection port 4213a1 is connected to the load port 4214a1 via a second switch S21. Since the power port 4211a2 is connected to the power port 4211a1 via a third switch S31, the power port 4211a2 can be switched to the power port 4211a1 via the third switch S31 and connected to the load port 4214a1 using the first switch S11 connected to the power port 4211a1. Similarly, since the connection port 4213a2 is connected to the connection port 4213a1 via a third switch S32, the connection port 4213a2 can be switched to the connection port 4213a1 via the third switch S32 and connected to the load port 4214a1 using the second switch S21 connected to the connection port 4213a2.

[0182] Accordingly, the power port 4211a1 can be connected to the connection port 4213a1 through the first switch S11 and the second switch S21, and connected to the connection port 4213a2 through the first switch S11, the second switch S21 and the third switch S32, and so on.

[0183] In a specific implementation, referring to Figures 9 and 13 , and continuing to take the example of connecting the load port 4214a1 of the first power distribution unit 421a to an electric vehicle and charging the electric vehicle, the first switch S11 and the third switch S31 are closed to conduct 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 outputted by the power module 410 received by the power port 4211a1 is transmitted to the load port 4214a1 via the first switch S11, and the power outputted by the power module 410 received by the power port 4211a2 is transmitted to the load port 4214a1 via the third switch S31 and the first switch S11, thereby charging the electric vehicle.

[0184] When the output power transmitted from power port 4211a1 and power port 4211a2 to load port 4214a1 is less than the required charging power of the electric vehicle, the second switch S21 is closed to establish a connection between connection port 4213a1 and load port 4214a1. In this case, the power output from first power distribution unit 421a in charging device 400b, received at connection port 4213a1, can be transmitted to load port 4214a1 via the second switch S21, thereby increasing the output power of load port 4214a1 to meet the required charging power of the electric vehicle.

[0185] It will be understood that the above embodiment is described using the example of a first power distribution unit 421a including two power ports 4211 and two connection ports 4213. In other embodiments, the first power distribution unit 421a may include three or more power ports 4211, and any two power ports 4211 may be connected via the 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 may be connected via the third switch unit SU3.

[0186] In the embodiment of the present application, compared to the embodiment shown in FIG. 12 , in which 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 port 4211a2 and the power port 4211a2 of the first power distribution unit 421a, and utilizes a third switch S32 to connect the connection port 4213a1 and the connection port 4213a2 of the first power distribution unit 421a. This reduces the number of switches in the first switch unit SU1 and the second switch unit SU2, while enabling connections between the power port 4211a1 and the power port 4211a2 and each connection port 4213 of the first power distribution unit 421a and each load port 4214. Furthermore, this helps improve the switch utilization rate in the switch matrix 4212, reduces the number of switches required in the switch matrix 4212, and thereby reduces the size and cost of the first power distribution unit 421a.

[0187] The above describes the charging device 400 provided by the embodiment of the present application by taking the charging device 400a in the charging system 300 as an example. The energy storage device 500 and the photovoltaic device 600 in the charging system 300 are further described in detail below with reference to the accompanying drawings.

[0188] FIG14 is a schematic structural diagram of an energy storage device 500 provided in an embodiment of the present application.

[0189] 14 , an 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. 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.

[0190] 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.

[0191] The battery pack 510 can be used to store 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. Alternatively, 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. In other words, the DC-DC converter 520 can be a bidirectional DC-DC converter.

[0192] It is understood that in the embodiment of the present application, the number of battery packs 510 and DC-DC converter devices 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 converter devices 520. The output terminal of each DC-DC converter device 520 can be connected to a DC-DC power port 5311.

[0193] It is also understood that in the embodiment of the present application, in the power distribution device 530, each connection port 5313 of the power distribution unit 531 can be used to connect to an external device capable of providing and receiving DC power, other than the corresponding power distribution unit 531. For example, each connection port 5313 of the power distribution unit 531 can be used to connect to the connection port 4213 of the power distribution unit 421 in the charging device 400a shown in Figure 7. Alternatively, each connection port 5313 of the power distribution unit 531 can be used to connect to the connection port 5313 of another power distribution unit 531 included in the corresponding power distribution device 530.

[0194] 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 conversion device 520 to each load port 5314 through the switch matrix 5312 to charge the load connected to the load port 5314, or transmit it to each connection port 5314 through the switch matrix 5312 to output DC power to an external device connected to each connection port 5314.

[0195] Each connection port 5314 of the power distribution unit 531 can be used to output the DC power transmitted by the power port 5311 to a connected device, or to receive the DC power output by a 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 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 conversion device 520.

[0196] Continuing to refer to Figure 14, at 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, a connection port 4213 of the first power distribution unit 421a of the charging device 400a shown in Figure 7, so as to enable power transmission between the first power distribution unit 531a and the power distribution unit of the charging device.

[0197] It is understood that in the embodiment of the present 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 the first power distribution unit 531a in the power distribution device 530 can be one or more.

[0198] It can also be understood that, in the embodiment of the present application, the number of the connection ports 5313 of the power distribution unit for connecting to the charging device in the first power distribution unit 531a can be one or more.

[0199] For example, in the case of the power distribution device 530 of the energy storage device 500 shown in FIG14 , which includes a first power distribution unit 531a and two connection ports 5313, the two connection ports 5313 of the first power distribution unit 531a can be connected one-to-one with the two connection ports 4213 of the first power distribution unit 421a in the charging device 400a shown in FIG7 . Thus, power can be transmitted 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 achieving power sharing between the energy storage device 500 and the charging device 400a.

[0200] 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.

[0201] For a detailed description of power sharing between the energy storage device 500 and the charging device 400a, reference may be made to the above description of power sharing between the charging device 400a and the charging device 400b, which will not be repeated here.

[0202] For details not yet provided in the power distribution device 530 of the energy storage device 500 , reference may be made to the related description of the power distribution device 420 of the charging device 400 a , which will not be repeated here.

[0203] In the energy storage device 500 provided in the embodiment of the present application, the DC power output by the battery pack 510 is output through the DC-DC converter 520 and 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 alone. This can improve the utilization rate of energy storage resources and help reduce the amount of power received from the power grid when using the charging device to charge the electric vehicle, thereby reducing the cost of charging the electric vehicle.

[0204] 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 via the provided connection port 5313, thereby achieving power sharing between the energy storage device 500 and the charging device. Furthermore, in actual applications, the connection port 5313 of the first power distribution unit 531a can transmit the power output by 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 requirements of different loads.

[0205] FIG15 is a schematic structural diagram of a photovoltaic device 600 provided in an embodiment of the present application.

[0206] 15 , a 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. 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.

[0207] The photovoltaic assembly 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 each power port 6311, each connection port 6313, and each load port 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 each power port 6311, each connection port 6312, and each load port 6314.

[0208] The photovoltaic assembly 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 direct current output by the photovoltaic assembly 610 into power and output it to each power port 6311.

[0209] It is understood that in the embodiment of the present application, the number of photovoltaic components 610 and DC-DC converters 620 can be one or more. The output end of each DC-DC converter 620 can be connected to a power port 6311 .

[0210] It is also understood that in the embodiment of the present 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 capable of providing and receiving DC power, other than the corresponding power distribution unit 631. For a detailed description, please refer to the description of the connection port 6313 in the energy storage device 500 described above, and will not be repeated here.

[0211] In a specific implementation, each power port 6311 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 through the switch matrix 6312 to charge the load connected to the load port 6314, or transmit the DC power to each connection port 6314 through the switch matrix 6312 to output DC power to an external device connected to each connection port 6314. Each connection port 6314 of the power distribution unit 631 can be used to receive DC power output by a connected external device and transmit the received DC power to each load port 6314 through the switch matrix 6312 to charge the load connected to the load port 6314.

[0212] Continuing to refer to 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, a connection port 4213 of the first power distribution unit 421a of the charging device 400a shown in Figure 7, so as to enable power transmission between the first power distribution unit 631a and the power distribution unit of the charging device.

[0213] It is understood that in the embodiment of the present 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 the first power distribution unit 631a in the power distribution device 630 can be one or more.

[0214] For example, in the case of the power distribution device 630 of the photovoltaic device 600 shown in FIG15 , which includes a first power distribution unit 631a and two connection ports 6313, the two connection ports 6313 of the first power distribution unit 631a can be connected one-to-one with the two connection ports 4213 of the first power distribution unit 421a in the charging device 400a shown in FIG7 . Thus, power can be transmitted 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.

[0215] When a load port 6314 in 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.

[0216] For a detailed description of power sharing between the photovoltaic device 600 and the charging device 400a, reference may be made to the above description of power sharing between the charging device 400a and the charging device 400b, which will not be repeated here.

[0217] For details about 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 530 in the energy storage device 500 , which will not be repeated here.

[0218] In the photovoltaic device 600 provided in the embodiment of the present application, the DC power output by the photovoltaic assembly 610 is output through the DC-DC converter 620 and then directly transmitted to the electric vehicle via 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 power received from the power grid when using the charging device to charge the electric vehicle, thereby reducing the cost of charging the electric vehicle.

[0219] 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 via the provided connection port 6313, thereby enabling power sharing between the photovoltaic device 600 and the charging device. In actual use, 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.

[0220] The above, combined with the accompanying drawings, further describes in detail the structures of the charging device 400, energy storage device 500, and photovoltaic device 600 in the charging system 300 provided in the embodiment of the present application. The following provides exemplary descriptions of different connection methods for the connection ports in the power distribution device of each device in the charging system 300.

[0221] FIG16 is a schematic structural diagram of a charging system 300 provided in an embodiment of the present application.

[0222] 16 , a charging system 300 includes multiple charging devices 400 and a power sharing bus 310. One 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 aggregates the power output from each power distribution unit 421 of each charging device 400 in the charging system 300, thereby forming a larger power pool on the power sharing bus 310.

[0223] It can be understood that since each power distribution unit 421 in each charging device 400 is connected to the power distribution units 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.

[0224] In some embodiments, to facilitate the connection between the power distribution units 421 of each charging device 400 in the charging system 300 through the 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 can be equal, and the number of power sharing buses 310 is equal to the number of connection ports 4213 of each power distribution unit 421.

[0225] In a specific implementation, the connection port 4213 of any power distribution unit 421 in any charging device 400 can obtain the power output by the connection ports 4213 of all power distribution units 421 included in all other charging devices 400 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 any power distribution unit 421, thereby further facilitating the improvement of the output power of the load port 4214 of any power distribution unit 421, thereby better meeting the charging power requirements of different loads.

[0226] For example, the charging system 300 shown in FIG16 includes two charging devices 400, and the power distribution device 420 of each charging device 400 includes two power distribution units 421, and each power distribution unit 421 includes two connection ports 4213 and two load ports 4214. That is, the charging system 300 includes a charging device 400a and a charging device 400b, and the power distribution device 420 of the charging device 400a includes power distribution units 421#1 and 421#2, and the power distribution unit 421#1 includes a connection port 421 3#1, 4213#2, the power distribution unit 421#2 includes connection ports 4213#3 and 4213#4, the power distribution device 420 of the charging device 400b includes power distribution units 421#3 and 421#4, the power distribution unit 421#3 includes connection ports 4213#5 and 4213#6, and the power distribution unit 421#4 includes connection ports 4213#7 and 4213#8. For example, the charging system 300 may include two power sharing buses 310, namely, power sharing buses 310a and 310b.

[0227] Among them, connection ports 4213#1, 4213#3, 4213#5, and 4213#7 are connected to power sharing bus 310a, while connection ports 4213#2, 4213#4, 4213#6, and 4213#8 are connected to power sharing bus 310b. Thus, two power sharing transmission lines are formed in charging system 300 via power sharing bus 310a and 310b. Any power distribution unit 421 in charging device 400a or 400b can obtain the power output by all remaining power distribution units 421 in charging device 400a or 400b via any of these power sharing transmission lines.

[0228] In a 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 requirement of 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 requirement of the electric vehicle.

[0229] 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 unit 421#3 and the power distribution unit 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 unit 421#3 and the power distribution unit 421#4 through the power sharing bus 310a, and transmit the obtained power to the two load ports 4214.

[0230] In the charging system 300 provided in the embodiment of the present application, by sharing the power of the idle power distribution units 421#3 and 421#4 in the charging device 400b to the power distribution unit 421#1 of the charging device 400a, it is not only beneficial for the output power of the load port 4214 of the power distribution unit 421#1 to meet the charging power demand of the electric vehicle, but also beneficial for improving the utilization rate of the power resources in the charging device 400b, avoiding the 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 increasing the working life of each charging device 400 in the charging system 300.

[0231] FIG17 is a schematic structural diagram of another charging system 300 provided in an embodiment of the present application.

[0232] 17 , different from the embodiment shown in FIG. 16 , in the multiple charging devices 400 of the charging system 300 , the connection ports 4213 of two adjacent power distribution units 421 are connected via a power sharing bus 310 .

[0233] For example, as shown in Figure 17, continuing with the example of charging system 300 shown in Figure 16, which includes charging devices 400a and 400b, charging system 300 also includes four power sharing buses 310, namely, power sharing buses 310a, 310b, 310c, and 310d. Connection port 4213#1 and connection port 4213#8 are connected via power sharing bus 310a, connection port 4213#2 and connection port 4213#3 are connected via power sharing bus 310b, connection port 4213#4 and connection port 4213#5 are connected via power sharing bus 310c, and connection port 4213#6 and connection port 4213#7 are connected via power sharing bus 310d. Thus, four power sharing transmission lines are formed in charging system 300 via power sharing buses 310a, 310b, 310c, and 310d. Any power distribution unit 421 in the charging device 400 a and the charging device 400 b can obtain the power output by the adjacent power distribution unit 421 through the connected power sharing bus 310 .

[0234] It can be understood that, in a specific implementation, when the two connection ports 4213 in each power distribution unit 421 included in the charging device 400a and the charging device 400b are connected through the switch matrix 4212, power transmission can also be performed between the power sharing bus 310 respectively 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 of all the remaining power distribution units 421 in the charging device 400a and the charging device 400b through the connected power sharing bus 310.

[0235] For example, taking the example of the connection port 4213#2 of the power distribution unit 421#1 obtaining the power output of the power distribution units 421#2 to 421#4 through the connected power sharing bus 310b, when the switch matrix 4212 in the power distribution unit 421#2 turns on the connection between the connection ports 4213#3 and 4213#4, and the switch matrix 4212 in the power distribution unit 421#3 turns on the connection between the connection ports 4213#5 and 4213#6, the power output of the power distribution units 421#3 and 421#4 collected by the power sharing bus 310d can be transmitted to the connection port 4213#5 through the connection port 4213#6, and then transmitted to the power sharing bus 310c through the connection port 4213#5. Furthermore, power sharing bus 310c can transmit the aggregated power output from power distribution units 421#2-421#4 to connection port 4213#3 via connection port 4213#4, and then transmit the power to connection port 4213#2 of power distribution unit 421#1 via connection port 4213#3 and power sharing bus 310b. Thus, connection port 4213#2 can transmit the aggregated power output from power distribution units 421#2-421#4 to load port 4214 connected to the electric vehicle, thereby increasing the output power of load port 4214 and meeting the charging power requirements of the electric vehicle.

[0236] In the charging system 300 provided in the embodiment of the present application, 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 unit 421 included in each charging device 400 in the charging system 300 can better meet the charging power requirements of different loads.

[0237] 18 and 19 are schematic structural diagrams of another charging system 300 provided in an embodiment of the present application.

[0238] 18 and 19 , unlike the embodiment shown in FIG. 16 and 17 , the charging system 300 includes, in addition to multiple charging devices 400 and a power sharing bus 310, an energy storage device 500 and / or a photovoltaic device 600. The energy storage device 500 and / or the photovoltaic device 600, as well as one connection port 4213 of each power distribution unit 421 in each charging device 400, are all connected to the power sharing bus 310. The power sharing bus 310 can be used to aggregate the power output by the energy storage device 500 and / or the photovoltaic device 600 in the charging system 300, as well as by each power distribution unit 421 in each charging device 400.

[0239] In a specific implementation, in some embodiments, as shown in FIG18 , the energy storage device 500 includes a power distribution device 530, and the photovoltaic device 600 includes a power distribution device 630. Specifically, one connection port 5313 of each power distribution unit 531 in the power distribution device 530, one connection port 6313 of each power distribution unit 631 in the power distribution device 630, and one connection port 4213 of each power distribution unit 421 in each charging device 400 are all connected to the power sharing bus 310. Thus, the connection port of any power distribution unit of any device in the charging system 300 can obtain the power output by the connection ports of all remaining power distribution units in the charging system 300 through the power sharing bus 310.

[0240] For example, as shown in Figure 18, continuing to take the charging system 300 shown in Figure 16 as an example, which includes a charging device 400a, a charging device 400b, a power sharing bus 310a and a power sharing bus 310b, the charging system 300 also includes an energy storage device 500 and a photovoltaic device 600. The power distribution device 530 of the energy storage device 500 includes a power distribution unit 531#1, and the power distribution unit 531#1 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, and the power distribution unit 631#1 includes connection ports 6313#1 and 6313#2.

[0241] Among them, connection ports 4213#1, 4213#3, 4213#5, 4213#7, 5313#1, and 6313#1 are connected to power sharing bus 310a, while connection ports 4213#2, 4213#4, 4213#6, 4213#8, 5313#2, and 6313#2 are connected to power sharing bus 310b. Thus, two power sharing transmission lines are formed in charging system 300 via power sharing bus 310a and 310b.

[0242] In a 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 requirement of the electric vehicle, the connection port 5313#1 of the power distribution unit 531#1 can obtain the power output by 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 requirement of the electric vehicle.

[0243] In the charging system 300 provided in the embodiment of the present application, the energy storage device 500 and the photovoltaic device 600 can independently charge electric vehicles through their respective power distribution devices, which is beneficial for enabling the charging system 300 to charge more electric vehicles simultaneously and improving the overall efficiency of the charging system 300 in charging electric vehicles. In addition, the energy storage device 500 and the photovoltaic device 600 can also transmit power between the power distribution unit 421 of the charging device 400 through their respective power distribution devices. Therefore, in actual application, when the grid price is low, the power distribution unit 421 of the charging device 400 can transmit the power received from the grid to the energy storage device 500, allowing the energy storage device 500 to store as much power as possible. When the grid price is high, the energy storage device 500 is preferentially used to charge the electric vehicle, thereby reducing the amount of power received from the grid when the charging device 400 is used to charge the electric vehicle, thereby reducing the cost of charging the electric vehicle.

[0244] In other embodiments, as shown in FIG19 , unlike the embodiment shown in FIG18 , the energy storage device 500 may not include a power distribution device 530, but may be directly connected to the power sharing bus 310 through the output end of the DC-DC converter 520 in the energy storage device 500. Similarly, the photovoltaic device 600 may not include a power distribution device 630, but may be directly connected to the power sharing bus 310 through the output end of the DC-DC converter 620 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 via 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.

[0245] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A power distribution device, characterized in that: Applied to a charging device, the charging device comprising a power module; The power distribution device comprises at least one power distribution unit, wherein the power distribution unit comprises at least one power supply port, a plurality of load ports, at least one connection port and a switch matrix. The power port is used to connect the power module, the load port is used to connect the 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 to disconnect or connect the connection between any two of the power port, the load port and the connection port; The at least one power distribution unit includes a first power distribution unit, and a connection port of the first power distribution unit is used to connect to the power distribution unit of other charging devices so that power is transmitted between the first power distribution unit and the power distribution unit of the other charging device.

2. The power distribution device according to claim 1, characterized in that: The power module includes an AC-DC converter, a DC-DC converter and a DC bus. The AC-DC conversion device is connected to the input end of the DC-DC conversion device via the DC bus; The AC-DC conversion device is used to convert the alternating current into a first direct current and then output it 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 a second direct current, and output the second direct current; The power port is used to connect to the 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 device according to claim 1 or 2, characterized in that: The power distribution device also includes a power sharing bus; A connection port of the first power distribution unit is used to connect to the power distribution unit of the other charging device through 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 power output by 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.

4. The power distribution device according to any one of claims 1 to 3, characterized in that: The at least one power distribution unit further comprises a second power distribution unit, Another connection port of the first power distribution unit is connected to one connection port of the second power distribution unit, so that power is transmitted between the first power distribution unit and the second power distribution unit.

5. The power distribution device according to claim 4, characterized in that: One connection port of the first power distribution unit is connected to another connection port of the first power distribution unit through the switch matrix; The switch matrix is ​​further used to disconnect or connect a connection between a connection port of the first power distribution unit and another connection port of the first power distribution unit.

6. The power distribution device according to any one of claims 1 to 5, characterized in that: The switch matrix of the power distribution unit includes a first switch unit and a second switch unit; The power port is connected to the connection port through the first switch unit and the second switch unit, the power port is connected to the load port through the first switch unit, and the connection port is connected to the load port through the second switch unit.

7. The power distribution device according to claim 6, characterized in that: The switch matrix of the power distribution unit further includes a third switch unit; Two power ports among the plurality of power ports of the power distribution unit are connected through the third switch unit, and / or two connection ports among the plurality of connection ports of the power distribution unit are connected through the third switch unit.

8. A charging device, characterized in that: include: Power modules and power distribution devices; The power distribution device comprises at least one power distribution unit, wherein the power distribution unit comprises at least one power supply port, a plurality of load ports, at least one connection port and a switch matrix. The power port is connected to the power module, the load port is used to connect 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 to disconnect or connect the connection between any two of the power port, the load port and the connection port; The at least one power distribution unit includes a first power distribution unit, and a connection port of the first power distribution unit is used to connect to the power distribution unit of other charging devices so that power is transmitted between the first power distribution unit and the power distribution unit of the other charging device.

9. The charging device according to claim 8, characterized in that: The power module includes an AC-DC converter, a DC-DC converter and a DC bus. The AC-DC conversion device is connected to the input end of the DC-DC conversion device through the DC bus, and the output end of the DC-DC conversion device is connected to the power port; The AC-DC conversion device is used to convert the alternating current into a first direct current and then output it 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 a second direct current, and output the second direct current to the power port.

10. An energy storage device, characterized in that: include: Battery pack, DC-DC converter and power distribution device; The power distribution device comprises at least one power distribution unit, wherein the power distribution unit comprises at least one power supply port, a plurality of load ports, at least one connection port and a switch matrix; The battery pack is connected to the power port through the DC-DC conversion device, the load port is used to connect a load, and any two of the power port, the load port and the connection port are connected through the switch matrix; The DC-DC conversion device is used to convert the direct current output by the battery pack into power and then output it to the power port, or to convert the direct current output by the power port into power and then output it to the battery pack; The switch matrix is ​​used to disconnect or connect the connection between any two of the power port, the load port and the connection port; The at least one power distribution unit includes a first power distribution unit, and a connection port of the first power distribution unit is used to connect to the power distribution unit of the charging device so that power is transmitted between the first power distribution unit and the power distribution unit of the charging device.

11. A charging system, characterized in that: include: Multiple charging devices; The charging device comprises a power module and a power distribution device, wherein the power distribution device comprises at least one power distribution unit, and the power distribution unit comprises at least one power port, a plurality of load ports, at least one connection port and a switch matrix; The power port is connected to the power module, the load port is used to connect 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 to disconnect or connect the connection between any two of the power port, the load port and the connection port; At least one power distribution unit of each of the charging devices includes a first power distribution unit, and a connection port of the first power distribution unit of one of the charging devices is connected to a connection port of the first power distribution unit of another of the charging devices to enable power transmission between the first power distribution unit of the one charging device and the first power distribution unit of the other charging device.

12. The charging system according to claim 11, characterized in that: The power module includes an AC-DC converter, a DC-DC converter and a DC bus. The AC-DC conversion device is connected to the input end of the DC-DC conversion device through the DC bus, and the output end of the DC-DC conversion device is connected to the power port; The AC-DC conversion device is used to convert the alternating current into a first direct current and then output it 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 a second direct current, and output the second direct current to the power port.

13. The charging system according to claim 11 or 12, characterized in that: The charging system further includes 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 to the power sharing bus; The power sharing bus is used to collect 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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