Charging system

Abstract

Embodiments of the present application provide a charging system, which comprises a plurality of charging devices. Each charging device comprises a plurality of charging modules, a charging gun and a communication module, and the output ends of the plurality of charging modules of each charging device are connected to the charging gun of the plurality of charging devices. The communication module of a first charging device in the plurality of charging devices communicates with a charging management cloud platform, and the communication modules of the charging devices other than the first charging device communicate with the charging management cloud platform through the communication module of the first charging device. When the communication module of the first charging device fails, the communication module of a second charging device in the other charging devices communicates with the charging management cloud platform, and the communication modules of the charging devices other than the second charging device in the other charging devices communicate with the charging management cloud platform through the communication module of the second charging device. In this way, not only the power sharing between the plurality of charging modules of different charging devices can be realized, but also the communication reliability of the plurality of charging devices can be improved.

Description

Technical Field

[0001] This application relates to the field of charging, and more specifically, to a charging system. Background Technology

[0002] With the accelerated implementation of the dual-carbon strategy and the increasing popularity of electric vehicles, the application of charging equipment as a supporting infrastructure is becoming more and more widespread. Currently, the output power requirements of charging equipment generally differ across different charging scenarios. For example, in high-power charging station scenarios, as users have increasingly higher requirements for charging time, electric vehicles need charging equipment to provide higher output power. Conversely, in low-power charging station scenarios, to meet the low-power charging needs of ordinary electric vehicles, electric vehicles require charging equipment to provide lower output power.

[0003] To ensure that the output power of charging equipment meets the diverse charging power requirements of electric vehicles, existing charging equipment typically incorporates charging modules of varying power specifications within the cabinet. Furthermore, the cabinet dimensions vary significantly depending on the power specifications of the charging modules. This results in a diverse range of charging equipment forms, increased design and manufacturing complexity, and higher management and maintenance costs. Summary of the Invention

[0004] This application provides a charging system that allows for power sharing among multiple charging devices, enabling flexible adjustment of the output power of each device's charging gun. This allows the charging gun's output power to meet varying output power requirements while also achieving a standardized design for the charging modules of multiple devices. Consequently, it reduces the design and manufacturing complexity of the charging devices and optimizes their management and maintenance costs. Furthermore, by employing a "master / backup node + sentinel mode" for communication management among the multiple charging devices in the system, the communication reliability of the charging system can be improved.

[0005] Firstly, a charging system is provided, comprising multiple charging devices. Each charging device includes multiple charging modules, one or more charging guns, and a communication module. The output terminals of the multiple charging modules of each charging device are connected to each charging gun of the multiple charging devices, and each charging gun is used to connect to an electric vehicle. The communication module of a first charging device is communicatively connected to a charging management cloud platform, and the communication modules of the other charging devices (excluding the first charging device) are communicatively connected to the charging management cloud platform through the communication module of the first charging device. Alternatively, when the communication module of the first charging device fails, the communication module of a second charging device among the other charging devices is communicatively connected to the charging management cloud platform, and the communication modules of each charging device (excluding the second charging device) are communicatively connected to the charging management cloud platform through the communication module of the second charging device.

[0006] In the charging system provided in this application embodiment, multiple charging modules of each charging device can output power to the charging gun of any one of the multiple charging devices, thereby enabling power sharing among the charging modules of different charging devices. In this way, the charging modules of each charging device in the charging system can be designed in a standardized manner according to low-power specifications. Furthermore, in practical applications, by allowing the charging gun of any charging device to draw upon the output power of the charging modules of other charging devices, the output power of the charging gun of that charging device can be flexibly adjusted to meet different output power requirements. This, in turn, reduces the design and manufacturing complexity of the charging devices and optimizes their management and maintenance costs.

[0007] Furthermore, when the communication module of the first charging device among multiple charging devices is functioning correctly, it acts as the master node, while the communication modules of the other charging devices act as backup nodes. The backup nodes communicate with the charging management cloud platform through the master node. If the communication module of the first charging device fails, the communication module of the second charging device takes over as the new master node. In other words, the multiple charging devices in the charging system manage the northbound communication network with the charging management platform using a "master / backup node + sentinel mode." This ensures that even if the communication module of the first charging device fails, other charging devices can continue to communicate normally with the charging management cloud platform through the second charging device. This improves the communication reliability between the charging system and the charging management cloud platform.

[0008] In one embodiment, each charging device further includes a controller. The controller of the first charging device is configured to: control multiple charging modules of the at least one charging device to output power to the at least one charging gun when at least one charging gun of one of the multiple charging devices is connected to an electric vehicle. Alternatively, when the first controller of the first charging device fails, the controller of the third charging device among the other charging devices is configured to: control multiple charging modules of the at least one charging device to output power to the at least one charging gun when at least one charging gun is connected to an electric vehicle.

[0009] Based on the above design, the controller of the first charging device among multiple charging devices can act as the master node when no fault occurs, and is used to centrally control the power output of multiple charging devices, thereby enabling the orderly charging of electric vehicles by the charging system. If the controller of the first charging device fails, the controller of the third charging device can take over as the new master node. That is, the multiple charging devices in the charging system adopt a "master / backup node + sentinel mode" approach to centrally control the power output of multiple charging devices. In this way, even if the controller of the first charging device fails, it will not affect the centralized control of the power output of multiple charging devices, thus ensuring the operational reliability of the charging system.

[0010] In one embodiment, the second charging device and the third charging device are the same charging device.

[0011] Based on the above design, when both the communication module and controller of the first charging device (acting as the master node) fail, the new master node between the communication modules of multiple charging devices and the new master node between the controllers of multiple charging devices are located on the same charging device. This reduces the communication interaction required by the controller (acting as the master node) during the centralized control of the power output of multiple charging devices according to charging instructions from the charging management cloud platform, thereby improving the power output efficiency of the multiple charging devices.

[0012] In one embodiment, when the sum of the rated output power of a plurality of charging modules in a charging device is greater than or equal to the required charging power of an electric vehicle connected to at least one charging gun, the at least one charging device includes a single charging device. Alternatively, when the sum of the rated output power of a plurality of charging modules in a charging device is less than the required charging power, the at least one charging device includes a single charging device and at least one other charging device among the plurality of charging devices.

[0013] Based on the above design, when the sum of the rated output power of multiple charging modules in a charging device can meet the total charging power demand of all electric vehicles connected to its charging gun, the controller, acting as the master node, can control the multiple charging modules of that charging device to output power to its own charging gun. Conversely, when the sum of the rated output power of the multiple charging modules in a charging device cannot meet the total charging power demand of all electric vehicles connected to its own charging gun, the controller, acting as the master node, can control multiple charging modules from that charging device and other charging devices to simultaneously output power to the charging gun connected to the electric vehicles in that charging device. This allows for flexible adjustment of the charging gun's output power to meet the charging needs of electric vehicles.

[0014] In one embodiment, one or more charging guns of a charging device include multiple charging guns. When multiple charging modules of a charging device output power to an electric vehicle through one of their own charging guns, and when another charging gun of a charging device is connected to another electric vehicle, the at least one charging device includes one charging device and at least one charging device other than the one charging device, and the multiple charging modules of the at least one charging device other than the one charging device are not in operation.

[0015] Based on the above design, when multiple charging modules of a charging device are charging an electric vehicle through a single charging gun, and another electric vehicle is connected to a different charging gun of the same device, the controller, acting as the master node, can control multiple charging modules from the same charging device and other non-operational charging devices to simultaneously output power to both charging guns. This allows for flexible adjustment of the output power of the two charging guns to meet the charging needs of the electric vehicles. Furthermore, compared to directly increasing the output power of multiple charging modules in a single charging device to meet the charging needs of two connected electric vehicles, having multiple charging modules from the same charging device and other non-operational charging devices output power simultaneously reduces the operating power of the multiple charging modules in the single charging device, thereby reducing operational losses. This, in turn, improves the operational stability and lifespan of the multiple charging modules within the charging device.

[0016] In one embodiment, each charging device includes a charging host and a charging terminal. Multiple charging modules and a communication module are disposed on the charging host, and one or more charging guns are disposed on the charging terminal. The charging terminal of each charging device is communicatively connected to its own communication module. In other charging devices, the charging terminal of each charging device is communicatively connected to the communication module of the first charging device through its own communication module. Alternatively, if the communication module of the first charging device fails, the charging terminal of each charging device other than the second charging device is communicatively connected to the communication module of the second charging device through its own communication module.

[0017] Based on the above design, when the communication module of the first charging device in the multiple charging devices is functioning correctly, it acts as the master node, while the communication modules of the other charging devices act as backup nodes. The charging terminals in the other charging devices communicate with the master node through their respective backup nodes. However, if the communication module of the first charging device fails, the communication module of the second charging device takes over as the new master node. The charging terminals of each charging device (excluding the second charging device) then communicate with the new master node through their respective backup nodes. In other words, the communication modules in the multiple charging devices manage the southbound communication network with the charging terminals using a "master / backup node + sentinel mode." This improves the reliability of communication between the multiple charging devices.

[0018] In one embodiment, each charging device further includes a DC bus and multiple DC-DC converters, and the multiple charging modules include multiple AC-DC converters. The output terminals of the multiple AC-DC converters of each charging device are connected to the input terminals of its multiple DC-DC converters via its own DC bus, and the output terminals of the multiple DC-DC converters of each charging device are connected to one or more charging guns. The charging pile also includes a switch group, and the DC buses of the multiple charging devices are connected through the switch group. The switch group is used to disconnect or connect the circuit between the DC buses of any two charging devices among the multiple charging devices.

[0019] Based on the above design, when the charging gun of any charging device in the charging system is connected to an electric vehicle, and the switch group activates the circuit between the DC bus of that charging device and the DC buses of other charging devices, the output power of the AC-DC converters of the other charging devices can be transmitted to the DC-DC converter of that charging device through their own DC buses, the switch group, and the DC bus of that charging device. This allows for flexible adjustment of the total input power of the DC-DC converter of any charging device, ensuring that the power output from the DC-DC converter to the charging gun meets the charging power requirements of the electric vehicle. Furthermore, since the output power of the AC-DC converters of different charging devices can be shared, each charging device's AC-DC converter can be designed with low power in the charging system. This reduces the design and manufacturing complexity of the charging equipment and optimizes its management and maintenance costs. Moreover, compared to designing AC-DC converters with high power specifications, low-power AC-DC converters are more conducive to reducing the production cost of the charging equipment. Attached Figure Description

[0020] Figure 1This is a schematic diagram of a charging device for charging an electric vehicle, as provided in an embodiment of this application.

[0021] Figure 2 This is an example provided in the embodiments of this application. Figure 1 The diagram shows the specific structure of the charging device.

[0022] Figure 3 This is a schematic diagram of a charging system provided in an embodiment of this application.

[0023] Figure 4 This is a schematic diagram of another charging system provided in an embodiment of this application.

[0024] Figure 5 and Figure 6 These are examples provided in the embodiments of this application. Figure 4 The diagram shows the specific structure of the charging system. Detailed Implementation

[0025] To facilitate understanding of the embodiments of this application, the following points will be explained before introducing the embodiments of this application.

[0026] In the description of the embodiments of this application, "connection" can refer to an electrical connection. An electrical connection can be understood as the transmission of signals between two electrical components through a direct or indirect electrical connection. For example, an electrical connection between A and B can be understood as a direct electrical connection between A and B, or an indirect electrical connection between A and B through one or more other electrical components.

[0027] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more than two.

[0028] In the description of the embodiments of this application, unless otherwise stated, "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0029] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0030] First, to facilitate understanding of the technical solutions provided in the embodiments of this application, we will introduce the application scenarios applicable to the embodiments of this application.

[0031] Figure 1 This is a schematic diagram of a scenario where a charging device 10 charges an electric vehicle 21, as provided in an embodiment of this application.

[0032] Combination Figure 1 In (a) and (b) of the above, the charging device 10 is used to receive the alternating current output from the power grid 22, convert the alternating current into stable direct current, and then supply it to the electric vehicle 21 to charge the electric vehicle 21. Alternatively, in some other embodiments, the electric vehicle 21 can also output electrical energy back to the power grid 22 through the charging device 10.

[0033] In some embodiments, such as Figure 1 As shown in (a), the charging device 10 is a split-type charging device. Specifically, the charging device 10 includes a charging host 11, one or more charging terminals 12, and one or more charging guns 13.

[0034] The charging host 11 includes multiple charging modules (not shown in the figure), which convert the AC power output from the power grid 22 into stable DC power before supplying it to the charging terminal 12. These charging modules may include alternating current-to-direct current (AC-DC) converters and direct current-to-direct current (DC-DC) converters. Detailed descriptions of the AC-DC and DC-DC converters will be provided below and will not be repeated here.

[0035] Each charging terminal 12 is connected to at least one of one or more charging guns 13, and each charging gun 13 is used to connect to an electric vehicle 21. Each charging terminal 12 is used to deliver DC power output from multiple charging modules to the electric vehicle 21 through the connected charging gun 13. In a specific implementation, an electric vehicle 21 may be connected to one or more charging guns 13.

[0036] It should be understood that, in the embodiments of this application, the charging terminal 12 may include a cabinet, a human-machine interface, a charging control unit, and a metering and billing unit, etc., for information interaction, energy transmission, and metering and billing with the electric vehicle 21.

[0037] It should also be understood that, in the embodiments of this application, electric vehicle 21 is a means of transportation driven by electric power. Electric vehicle 21 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), etc.

[0038] In other embodiments, as shown in Figure (1)(b), the charging device 10 is an integrated charging device. Specifically, the human-machine interface, charging control unit, and metering and billing unit in the charging device 10 are directly installed in the charging host 11. Thus, the charging device 10 may include the charging host 11 and the charging gun 13 connected to the charging host 11, but does not include the charging terminal 12. In a specific implementation, the multiple charging modules in the charging host 11 convert the AC power output from the power grid 22 into stable DC power, which is then directly transmitted to the electric vehicle 21 through the charging gun 13.

[0039] The following is based on Figure 1 Taking the split-type charging pile shown in (a) as an example, the structure of the charging host 11 in the charging equipment 10 will be further introduced.

[0040] Figure 2 This is an example provided in the embodiments of this application. Figure 1 A schematic diagram of the specific structure of the charging device 10 shown in (a).

[0041] See Figure 2 The charging host 11 includes at least one AC-DC converter 111, at least one DC-DC converter 112, a DC bus 113, and a power distribution device 114. For example... Figure 2 An exemplary embodiment shows a charging host 11 comprising multiple AC-DC converters 111 and multiple DC-DC converters 112. The multiple AC-DC converters 111 and multiple DC-DC converters 112 are installed within a cabinet of the charging host 11. The input terminal of each AC-DC converter 111 is connected to the power grid 22, and the output terminal of each AC-DC converter 111 is connected to the input terminal of each DC-DC converter 112 via a DC bus 113. The output terminal of each DC-DC converter 112 is connected to each charging terminal 12 in the charging device 10 via a power distribution device 114, and each charging terminal 12 is connected to a charging gun 13.

[0042] In practical implementation, each AC-DC converter 111 converts the alternating current output from the power grid 22 into direct current and outputs it to the DC bus 113. Each DC-DC converter 112 further converts the DC power obtained from the DC bus 113 into DC power suitable for the electric vehicle 21 and outputs it to the power distribution device 114. The power distribution device 114 dynamically distributes the DC power output from each DC-DC converter 112 according to the actual charging power required by the electric vehicle 21, and transmits the distributed power to the charging gun 13 through the charging terminal 12, so that the power output from the charging gun 13 to the electric vehicle 21 meets the charging needs of the electric vehicle 21.

[0043] As described in the background section above, the AC-DC converter 111 and DC-DC converter 112 in the charging equipment 10 use different power specifications in different charging scenarios, and the cabinet size of the charging host 11 also varies significantly. For example, in high-power charging station scenarios, the maximum rated output power of the charging host 11 needs to be 720kW or 480kW, and correspondingly, the AC-DC converter 111 and DC-DC converter 112 need to use larger power specifications. At the same time, in order to install the aforementioned AC-DC converter 111 and DC-DC converter 112 with larger power specifications, the cabinet size of the charging host 11 is larger. However, in low-power charging station scenarios, the maximum output power of the charging host 11 needs to be 320kW, and correspondingly, the AC-DC converter 111 and DC-DC converter 112 can use smaller power specifications. At the same time, the cabinet size of the charging host 11 is smaller.

[0044] As mentioned above, the different output power requirements under different charging scenarios result in a variety of product forms for the charging device 10, which leads to greater design and manufacturing difficulties and higher management and maintenance costs for the charging device 10.

[0045] Based on the above, this application provides a charging system that allows for power sharing among multiple charging devices, enabling flexible adjustment of the output power of each device's charging gun. This allows the charging gun's output power to meet different output power requirements while also achieving a standardized design for the charging module of each device. Furthermore, this reduces the design and manufacturing complexity of the charging devices and optimizes their management and maintenance costs. In addition, by employing a "master / backup node + sentinel mode" for communication management among the multiple charging devices in the system, the communication reliability of the charging system can be improved.

[0046] The charging system provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be noted that, for ease of description and understanding, in the accompanying drawings provided in the embodiments of this application below, solid lines represent power transmission lines, and dashed lines represent signal transmission lines.

[0047] Figure 3 This is a schematic diagram of the structure of a charging system 30 provided in an embodiment of this application.

[0048] See Figure 3 The charging system 30 includes multiple charging devices 31, each charging device 31 including multiple charging modules 311 and one or more charging guns 312, for example... Figure 3 An example is shown where each charging device 31 includes a charging gun 312.

[0049] In this system, the output terminals of the multiple charging modules 311 of each charging device 31 are connected to each charging gun 312 of the multiple charging devices 31. That is, in addition to being connected to each charging gun 31 of itself, the output terminals of the multiple charging modules 311 of each charging device 31 are also connected to each charging gun 312 of each other charging device 31 in the charging system 30.

[0050] It should be understood that, in the embodiments of this application, the plurality of charging modules 311 may be power conversion devices capable of outputting power to the charging gun 312. The plurality of charging modules 311 may be, for example, a plurality of AC-DC conversion devices or a plurality of DC-DC conversion devices.

[0051] The specific method of connecting the output terminals of multiple charging modules 311 to the charging guns 312 of multiple charging devices 31 will be described below, and will not be repeated here.

[0052] It should also be understood that in the embodiments of this application, the number of charging guns 312 in different charging devices 31 may be the same or different. For ease of description and understanding, the embodiments of this application are described with the example of each charging device 31 including one charging gun 312.

[0053] Based on the above design, multiple charging modules 311 in each charging device 31 can output power to the charging gun 312 of any one of the charging devices 31, thereby enabling power sharing among the charging modules 311 of different charging devices 31. In this way, the charging modules 311 of each charging device 31 in the charging system 30 can be normalized according to low-power specifications. In practical applications, when the charging power demand of the electric vehicle connected to its own charging gun 312 is low, the charging device 31 can output power from its own charging modules 311 to its own charging gun 312 to meet the charging needs of the electric vehicle. Alternatively, when the charging power demand of the electric vehicle connected to its own charging gun 312 is high, the charging device 31 can utilize the output power of multiple charging modules 311 of other charging devices 31 to ensure that the output power of its own charging gun 312 meets the charging needs of the electric vehicle. This reduces the design and manufacturing complexity of the charging device 31 and optimizes its management and maintenance costs. In addition, compared to designing the charging module 311 according to high power specifications, the low power charging module 311 is more conducive to reducing the production cost of the charging device 31 and reducing the size of the cabinet used to install the charging module 311, thereby facilitating the handling and installation of the charging device 31.

[0054] Continue reading Figure 3 Each charging device 31 also includes a first communication module 313, through which each charging device 31 communicates with devices other than itself. For example, each charging device 31 in the charging system 30 communicates with the first communication module 313 of each other charging device 31 through its own first communication module 313.

[0055] In addition, the charging system 30 includes a first charging device among its multiple charging devices 31. The first communication module 313 of the first charging device is communicatively connected to the charging management cloud platform 40, and the first communication modules 313 of the other charging devices 31 besides the first charging device are communicatively connected to the charging management cloud platform 40 through the first communication module 313 of the first charging device.

[0056] It should be understood that in the embodiments of this application, the first charging device may be one of the multiple charging devices 31 whose first communication module 313 can establish a communication connection with the charging management cloud platform 40.

[0057] Specifically, with Figure 3Taking the charging system 30 shown as an example, which includes three charging devices 31 (specifically, charging devices 31a, 31b, and 31c), with charging device 31a serving as the first charging device, the first communication module 313 of charging device 31a acts as the master node among the first communication modules 313 of the three charging devices 31 when no fault occurs. This master node is used to establish a communication connection with the charging management cloud platform 40. The first communication modules 313 of charging devices 31b and 31c act as backup nodes among the first communication modules 313 of the three charging devices 31, and are used to communicate with the charging management cloud platform 40 through the master node. In other words, in the charging system 30, the three charging devices 31 communicate with the charging management cloud platform 40 using a "master-backup node" model.

[0058] In practice, the first communication module 313 of the charging device 31b and the charging device 31c, which are backup nodes, can periodically send their own data information to the first communication module 313 of the charging device 31a, which is the master node. At the same time, the first communication module 313 of the charging device 31a periodically sends the data information received from the charging devices 31b and 31c, as well as its own data information, to the charging management cloud platform 40.

[0059] For example, the data information sent by the charging device 31a to the charging management cloud platform 40 may include the current operating output voltage, current, power, power, charging mode, charging gun head temperature of each charging device 31 in the charging system 30, the charging power required by the electric vehicle connected to the charging gun 312, fault positions, alarm status, etc. In this way, the charging management cloud platform 40 can monitor the operating status, charging records, and fault information of each charging device 31 in the charging system 30 in real time based on the received data information, and perform remote control and maintenance.

[0060] For example, the first communication modules 313 of any two charging devices 31 can be connected via a wired connection, such as through a controller area network (CAN) connection. Furthermore, the first communication module 313 of the charging device 31, acting as the master node, can communicate with the charging management cloud platform 40 via at least one wired connection and a wireless connection. The wireless connection can be, for example, a communication connection established through a wireless network such as 4G or 5G. The wired connection can be, for example, a wired communication connection established through Fast Ethernet (FE).

[0061] Continue reading Figure 3 When the first communication module 313 of the first charging device malfunctions, the other charging devices 31 besides the first charging device include the second charging device. The first communication module 313 of the second charging device is communicatively connected to the charging management cloud platform 40, and the first communication module 313 of each of the other charging devices 31 besides the second charging device is communicatively connected to the charging management cloud platform 40 through the first communication module 313 of the second charging device.

[0062] Specifically, when the first communication module 313 of the first charging device acts as the master node, the first communication modules 313 of other charging devices 31 (excluding the first charging device) act as backup nodes and are also used to monitor whether the master node has failed. When the master node fails, the first communication modules of other charging devices 31 (excluding the first charging device) can no longer communicate normally with the charging management cloud platform 40 through the first communication module 313 of the first charging device.

[0063] In this scenario, the backup node can automatically switch the primary node from the first communication module 313 of the first charging device to the first communication module 313 of the second charging device through an election process. The second charging device can be any charging device 31 whose first communication module 313 is functioning correctly and can establish a communication connection with the charging management cloud platform 40. In other words, in the charging system 30, multiple charging devices 31 manage the northbound communication network with the charging management cloud platform 40 using a "primary / backup node + sentinel mode." This ensures that even if the first communication module 313 of the first charging device fails, other charging devices 31 in the charging system 30 can still continue to communicate normally with the charging management cloud platform 40 through the second charging device. This improves the communication reliability between the charging system 30 and the charging management cloud platform 40.

[0064] Continue reading Figure 3 In one embodiment, each charging device 31 further includes a first controller 314. The first controller 314 of the first charging device is configured to: control the plurality of charging modules 311 of the at least one charging device 31 to output power to the at least one charging gun 312 when at least one charging gun 312 of one of the plurality of charging devices 31 is connected to an electric vehicle.

[0065] Specifically, when the first controller 314 of the first charging device is not faulty, the first controller 314 of the first charging device can serve as the master node among the first controllers 314 of multiple charging devices 31, and is used to centrally control the power output of the multiple charging devices 31. The first controllers 314 of the other charging devices 31 besides the first charging device serve as backup nodes and are used to execute the control commands of the master node.

[0066] For example, still using Figure 3 The charging system 30 shown includes charging devices 31a, 31b, and 31c, with charging device 31a serving as the first charging device. The first controller 314 of charging device 31a is functioning correctly and acts as the master node, while the first controllers 314 of charging devices 31b and 31c act as backup nodes. When the charging gun 312b of charging device 31b is connected to an electric vehicle, the first controller 314 of charging device 31b, after confirming the connection between the charging gun 312b and the electric vehicle, receives the charging request information sent by the electric vehicle through its first communication module 313 and forwards the received information to the first communication module 313 of charging device 31a. The first communication module 313 of charging device 31a can then send the received information to the first controller 314 of charging device 31a.

[0067] Furthermore, the first controller 314 of the charging device 31a can combine the working status of the charging modules 311 of the three charging devices 31 and the output power that the charging modules 311 can provide to control the multiple charging modules 311 of at least one of the charging devices 31a, 31b and 31c to output power to the charging gun 312b.

[0068] For example, when it is confirmed that the output power provided by the multiple charging modules 311 of the charging device 31b meets the charging power requirements of the electric vehicle connected to the charging gun 312b, the first controller 314 of the charging device 31a can send a power output command to the charging device 31b through its first communication module 313. Furthermore, based on the received power output command, the charging device 31b controls its multiple charging modules 311 to output power to the charging gun 312b. In this way, while meeting the charging power requirements of the electric vehicle, the charging system 30 can also achieve orderly charging of the electric vehicle.

[0069] For example, the first communication module 313 and the first controller 314 in each charging device 31 can be integrated into the same hardware, or the first communication module 313 and the first controller 314 can be located in different hardware. For ease of description and understanding, the embodiments of this application are described using the example that the first communication module 313 and the first controller 314 can be located in different hardware.

[0070] Continue reading Figure 3 In one embodiment, when the first controller 314 of the first charging device malfunctions, the other charging devices 31 among the plurality of charging devices 31 besides the first charging device include a third charging device. The first controller 314 of the third charging device is configured to: control the plurality of charging modules 311 of at least one charging device 31 to output power to the at least one charging gun 312 when at least one charging gun 312 of one of the plurality of charging devices 31 is connected to an electric vehicle.

[0071] Specifically, when the first controller 314 of the first charging device fails, the first controllers 314 of other charging devices 31 besides the first charging device act as backup nodes and are also used to monitor whether the master node has failed. When the master node fails, the master node cannot centrally control the power output of multiple charging devices 31.

[0072] In this scenario, the backup node can elect a new master node, switching from the first controller 314 of the first charging device to the first controller 314 of the third charging device. The third charging device can be any charging device 31 whose first controller 314 is functioning correctly. In other words, in the charging system 30, multiple charging devices 31 employ a "master / backup node + sentinel mode" for centralized control of their power output. This ensures that even if the first controller 314 of the first charging device fails, the centralized control of the power output of the multiple charging devices 31 remains unaffected, thus guaranteeing the operational reliability of the charging system 30.

[0073] In one embodiment, the third charging device and the second charging device can be the same charging device 31. That is, when both the first communication module 313 and the first controller 314 of the first charging device, which serves as the master node, fail, the new master node among the first communication modules 313 of the multiple charging devices 31 and the new master node among the first controllers 314 of the multiple charging devices 31 are located in the same charging device 31.

[0074] It should be understood that when the new master node between the first communication modules 313 of multiple charging devices 31 and the new master node between the first controllers 314 of multiple charging devices 31 are located in different charging devices 31, the communication interaction between the charging device 31 where the first controller, as the master node, is located and the charging management cloud platform 40 is relatively cumbersome during the process of the first controller, as the master node, centrally controlling the power output of multiple charging devices 31 according to the charging instructions of the charging management cloud platform 40.

[0075] For example, with Figure 3 Taking the first communication module 313 of charging device 31b and the first controller 314 of charging device 31c as new master nodes, when the first controller 314 of charging device 31c, as the master node, centrally controls the power output of the three charging devices 31 according to the instructions sent by the charging management cloud platform 40, the charging management cloud platform 40 first needs to send the charging instruction to the first communication module 313 of charging device 31b, and then the first communication module 313 of charging device 31b forwards it to the first communication module 313 of charging device 31c. Afterwards, the first communication module 313 of charging device 31c sends the received transmission instruction to the first controller 314 of charging device 31c. However, when the first communication module 313 of charging device 31b and the first controller 314 of charging device 31b are respectively new master nodes, the charging management cloud platform 40 can send the charging instruction to the first communication module 313 of charging device 31b, and then the first communication module 313 of charging device 31b sends the received transmission instruction to the first controller 314 of charging device 31b.

[0076] Based on the above analysis, by setting the first communication module 313 and the first controller 314, which serve as the new master node, in the same charging device 31, the communication interaction of the first controller 314, which serves as the master node, in the process of centrally controlling the power output of multiple charging devices 31 according to the charging instructions of the charging management cloud platform 40 can be reduced, thereby improving the power output efficiency of multiple charging devices 31.

[0077] In one embodiment, when at least one charging gun 312 of one of the multiple charging devices 31 is connected to an electric vehicle, a first controller 314, acting as the master node, controls multiple charging modules 311 of at least one of the multiple charging devices 31 to output power to the at least one charging gun 312.

[0078] Wherein, when the sum of the rated output power of the plurality of charging modules 311 of a charging device 31 is greater than or equal to the required charging power of the electric vehicle connected to the at least one charging gun 312, at least one of the plurality of charging devices 31 includes the single charging device 31. Alternatively, when the sum of the rated output power of the plurality of charging modules 311 of a charging device 31 is less than the required charging power of the electric vehicle connected to the at least one charging gun 312, at least one of the plurality of charging devices 31 includes the single charging device 31 and at least one other charging device 31 among the plurality of charging devices 31.

[0079] Specifically, still based on Figure 3 Taking the charging device 31a as the first charging device, and the first controller 314 of the first charging device as the master node, and the first controllers 314 of the charging devices 31b and 31c as backup nodes as an example, when the charging gun 312b of the charging device 31b is connected to an electric vehicle, when the sum of the rated output power of the multiple charging modules 311 of the charging device 31b is greater than or equal to the required charging power of the electric vehicle connected to the charging gun 312b, the first controller 314 of the charging device 31a can control the multiple charging modules 311 of the charging device 31b to output power to the charging gun 312b, thereby meeting the charging needs of the electric vehicle.

[0080] For example, the first controller 314 of charging device 31a can send a message indicating output power to the first communication module 313 of charging device 31b via its own first communication module 313. The first communication module 313 of charging device 31b can send the received message to its own first controller 314. In this way, the first controller 314 of charging device 31b can control its multiple charging modules 311 to output power to charging gun 312b according to the message indication.

[0081] When the sum of the rated output power of the multiple charging modules 311 of charging device 31b is less than the required charging power of the electric vehicle connected to charging gun 312b, the first controller 314 of charging device 31a can determine, based on data information from charging devices 31a and 31c, such as the current output power of the multiple charging modules 311 of charging devices 31a and 31c, to share the output power of at least one of charging devices 31a and 31c with charging device 31b. For example, when it is confirmed that the charging power of charging device 31c will be shared with charging device 31b, the first controller 314 of charging device 31a can simultaneously send power output messages to the first communication modules 313 of charging devices 31b and 31c through its own first communication module 313, and control the circuit between the multiple charging modules 311 of charging device 31c and charging gun 312b to enable the charging modules 311 of charging devices 31b and 31c to output power to charging gun 312b together. This increases the output power of the charging gun 312b, which helps meet the charging needs of electric vehicles.

[0082] In the above technical solution, when the sum of the rated output power of multiple charging modules of any one charging device 31 in the charging system 30 can meet the total charging power demand of all electric vehicles connected to its charging gun 312, the first controller 314, as the master node, can control the multiple charging modules 311 of that charging device 31 to output power to the charging gun 312 connected to the electric vehicle. Conversely, when the sum of the rated output power of the multiple charging modules 311 of any one charging device 31 cannot meet the total charging power demand of all electric vehicles connected to its charging gun 312, the first controller 314, as the master node, can control that one charging device 31 and the multiple charging modules 311 of other charging devices 31 to output power to the charging gun 312 connected to the electric vehicle in that charging device 31. This allows for flexible adjustment of the output power of the charging gun 312 to meet the charging needs of the electric vehicles.

[0083] In other embodiments, when at least one charging gun 312 of one of the multiple charging devices 31 is connected to an electric vehicle, a first controller 314, acting as a master node, controls the multiple charging modules 311 of at least one of the multiple charging devices 31 to output power to the at least one charging gun 312.

[0084] The charging device 31 includes multiple charging guns 312. When the multiple charging modules 311 of the charging device 31 output power to an electric vehicle through one of their charging guns 312, and another charging gun 312 of the charging device 31 is connected to another electric vehicle, at least one of the multiple charging devices 31 includes the original charging device 31 and at least one other charging device 31 besides the original charging device 31, and the multiple charging modules 311 in the at least one other charging device 31 are not in operation.

[0085] Specifically, still based on Figure 3 Taking the charging device 31a as the first charging device, and its first controller 314 as the master node, and the first controllers 314 of charging devices 31b and 31c as backup nodes, as an example, charging device 31b includes multiple charging guns 312. When multiple charging modules 311 of charging device 31b output power to an electric vehicle through one of its charging guns 312, another charging gun 312 of charging device 31b is connected to another vehicle to be charged. In this case, if multiple charging modules 311 of charging device 31c are not working, the first controller 314 of charging device 31a can control multiple charging modules 311 in charging devices 31b and 31c to simultaneously output power to the two charging guns 312 in charging device 31b connected to the electric vehicle.

[0086] Therefore, the output power of the two charging guns of the charging device 31b can be flexibly adjusted to meet the charging needs of the electric vehicles connected to it. Furthermore, when another charging gun 312 of the charging device 31b is connected to another vehicle to be charged, although directly increasing the output power of the multiple charging modules 311 of the charging device 31b may also meet the charging needs of the electric vehicles connected to the two charging guns 312, the operating power of the multiple charging modules 311 of the charging device 31b is relatively high in this case. However, in this embodiment, by having the charging device 31b and the multiple charging modules 311 of the non-operational charging device 31c output power together, the operating power of the multiple charging modules 311 of the charging device 31b can be reduced, thereby reducing the operating losses of the multiple charging modules 311. This, in turn, helps to improve the operational stability and service life of the multiple charging modules 311.

[0087] It should be understood that, in the embodiments of this application, each charging device 31 in the charging system 30 may be Figure 1 The split-type charging device shown in (a) can also be Figure 1 The integrated charging device shown in (b) is shown in the image.

[0088] For example, in one embodiment, such as Figure 3 As shown, each charging device 31 in the charging system 30 also includes a charging host 315. Multiple charging modules 311, a charging gun 312, a first communication module 313, and a first controller 314 are all housed in the charging host 315. That is, the charging device 31 is an integrated charging device.

[0089] It should be understood that in the integrated charging device, the first communication module 313 is used not only to realize the communication interaction between the charging device 31 and the charging management cloud platform 40, but also to realize the communication interaction between the charging device 31 and the electric vehicle.

[0090] For example, the first communication module 313 in each charging device 31 can be connected to the communication plug in its own charging gun 312. When the charging gun 312 is connected to an electric vehicle, the first communication module 313 can communicate with the electric vehicle through the communication plug of the charging gun 312.

[0091] For example, still using Figure 3 Taking the charging device 31a as the first charging device, and its first communication module 313 as the master node, and the first communication modules 313 of charging devices 31b and 31c as backup nodes, when the charging gun 312b of charging device 31b is connected to an electric vehicle, the first communication module 313 of charging device 31b can receive charging demand information sent by the electric vehicle through the charging gun 312b. Furthermore, the first communication module 313 of charging device 31b can also be used to send the received charging demand information of the electric vehicle to the charging management cloud platform 40 through the first communication module 313 of charging device 31a, so that the charging cloud platform 40 can perform remote control.

[0092] For details regarding the integrated charging device mentioned above, please refer to [link / reference]. Figure 1 The relevant description of the embodiment shown in (b) is not repeated here.

[0093] In another embodiment, see Figure 4 , Figure 4 This is a schematic diagram of another charging system 30 provided in an embodiment of this application.

[0094] and Figure 3 The difference between the illustrated embodiment and the one shown is that, in Figure 4In the charging system 30 shown, each charging device 31 includes a charging host 315 and a charging terminal 316. Multiple charging modules 311 and a first communication module 313 are disposed in the charging host 315, and one or more charging guns 312 are disposed in the charging terminal 316. That is, the charging device 31 is a split-type charging device. Furthermore, the charging terminal 316 in each charging device 31 is also communicatively connected to its own first communication module 313.

[0095] Specifically, each charging terminal 316 of the charging device 31 includes a second communication module 3161, which is communicatively connected to the first communication module 313 within the same charging device 31. That is, the charging host 315 and the charging terminal 316 within the same charging device 31 are communicatively connected. Furthermore, the second communication module 3161 is also used for communication with the electric vehicle. For example, the second communication module 3161 can communicate with the electric vehicle through the communication plug in the charging gun 312 of its own charging terminal 316. Thus, the first communication module 313 within the same charging device 31 communicates and interacts with the electric vehicle through the second communication module 3161.

[0096] Continue reading Figure 4 In some embodiments, when the first communication module 313 of the first charging device is not faulty, the charging terminal 316 of each of the other charging devices 31 (excluding the first charging device) is communicatively connected to the first communication module 313 of the first charging device through its own first communication module 313. Alternatively, when the first communication module 313 of the first charging device is faulty, the charging terminal 316 of each of the other charging devices 31 (excluding the second charging device) is communicatively connected to the communication module 313 of the second charging device through its own communication module 313.

[0097] For example, with Figure 4 The charging system 30 shown includes charging device 31a, charging device 31b, and charging device 31c. Taking charging device 31a as the first charging device, when the first communication module 313 of charging device 31a is the master node and the first communication modules 313 of charging devices 31b and 31c are the backup nodes, the second communication module 3161 in charging device 31b and the second communication module 3161 in charging device 31c are respectively connected to the first communication module 313 of charging device 31a through the first communication module 313 of charging device 31b and the first communication module 3161 in charging device 31c through the first communication module 313 of charging device 31c.

[0098] In practical implementation, the second communication module 3161 in charging device 31b can periodically send data from the charging terminal 316 of charging device 31b to the charging management cloud platform 40 through the first communication module 313 of charging device 31b and the first communication module 313 of charging device 31a. Simultaneously, the first communication module 313 of charging device 31a can send relevant instructions sent by the charging management cloud platform 40, such as gun control instructions, to the second communication module 3161 of charging device 31b through the first communication module 313 of charging device 31b, so that the charging terminal 316 where the second communication module 3161 is located can execute the corresponding instructions.

[0099] When the first communication module 313 of charging device 31a fails, the first communication module 313 of charging device 31b can take over as the new master node. The first communication module 313 of charging device 31c serves as the backup node, and the second communication module 3161 in charging device 31c communicates with the first communication module 313 of charging device 31b through the first communication module 313 of charging device 31c.

[0100] Based on the above analysis, in the charging system 30, the first communication module 313 of the multiple charging devices 31 manages the southbound communication network with the second communication module 3161 using a "primary / backup node + sentinel mode". That is, the charging host 315 of the multiple charging devices 31 manages the southbound communication network with the charging terminal 316 using a "primary / backup node + sentinel mode". This helps improve the communication reliability between the multiple charging devices 31 in the charging system 30.

[0101] In some embodiments, see further reference. Figure 4 Each charging device 31 has a first controller 314 also located in the charging host 315 to control the power output of the multiple charging modules 311 in the charging device 31. In addition, each charging terminal 316 also includes a second controller 3162, which is mainly used to control and manage the power output of the charging gun 312 based on the control commands of the first controller 314 in its own charging device 31.

[0102] It should be understood that any omissions or incomplete information regarding split-type charging devices can be found in [the relevant documentation / reference]. Figure 1 The relevant description of the embodiment shown in (a) is not repeated here.

[0103] The following is an exemplary description of the specific method by which the output terminals of the multiple charging modules 311 of each charging device 31 mentioned above are connected to the charging guns 312 of the multiple charging devices 31.

[0104] Figure 5This is an example provided in the embodiments of this application. Figure 4 The diagram shows the specific structure of the charging system 30.

[0105] See Figure 5 In one embodiment, each charging device 31 further includes a DC bus 317 and a plurality of DC-DC converters 318, and the plurality of charging modules 311 include a plurality of AC-DC converters 3111. The output terminals of the plurality of AC-DC converters 3111 of each charging device 31 are connected to the input terminals of its plurality of DC-DC converters 318 via its own DC bus 317, and the output terminals of the plurality of DC-DC converters 318 of each charging device 31 are connected to one or more charging guns 312. For example, Figure 5 An exemplary illustration shows that each charging device 31 includes a charging gun 312, and the output terminals of a plurality of DC-DC converters 318 of each charging device 31 are connected to one of its own charging guns 312.

[0106] Furthermore, in each charging device 31, each AC-DC converter 3111 is used to convert the AC power output from the AC power source into DC power and output it to the DC bus 317, and each DC-DC converter 318 is used to obtain DC power from the DC bus 317, and to perform power conversion on the obtained DC power and output it to the charging gun 312.

[0107] In some embodiments, each charging device 31 further includes a power distribution device 3100, the output of each DC-DC converter 318 in the charging device 31 being connected to the charging gun 312 via the power distribution device 3100. The power distribution device 3100 is used to dynamically distribute the power output of each DC-DC converter 318.

[0108] It should be understood that, in specific implementation, it should be combined with Figure 4 and Figure 5 Multiple DC-DC converters 318, multiple AC-DC converters 3111, and a power distribution device 3100 are all housed in the charging host 315 of the charging device 31. For a detailed description, please refer to [link to relevant documentation]. Figure 2 The relevant descriptions of the embodiments shown will not be repeated here.

[0109] Continue reading Figure 5 The charging system 30 also includes a first switch group 32, through which the DC buses 317 of the multiple charging devices 31 are connected. The first switch group 32 is used to disconnect or connect the circuit between the DC buses 317 of any two charging devices 31. That is, the DC buses 317 of any two charging devices 31 can be interconnected through the first switch group 32.

[0110] Based on the above design, the output terminals of multiple AC-DC converters 3111 of any one charging device 31 can be connected to the input terminals of multiple DC-DC converters 318 of another charging device 31 via an interconnected DC bus 317, thereby connecting the charging gun 312 of another charging device 31 through the multiple DC-DC converters 318 of that other charging device 31. In this way, the output power of the AC-DC converters 3111 of any one charging device 31 can be transmitted to the charging gun 312 of another charging device 31 via the interconnected DC bus 317, thus enabling power sharing between different charging devices 31.

[0111] It should be understood that, in specific implementation, the number of first switch groups 32 in the charging system 30 may be one or more, and each first switch group 32 may include one or more first switches.

[0112] For example, with Figure 5 Taking the charging system 30 shown as including charging devices 31a, 31b, and 31c as an example, the charging system 30 also includes two sets of first switch groups 32, namely first switch group 32a and first switch group 32b. The DC bus 317 of charging device 31a is connected to one end of the DC bus 317 of charging device 31b through the first switch group 32a, and the other end of the DC bus 317 of charging device 31b is connected to the DC bus 317 of charging device 31c through the first switch group 32b. Thus, the DC buses 317 of charging devices 31a, 31b, and 31c are sequentially interconnected through the first switch groups 32a and 32b.

[0113] For example, each of the first switch group 32a and the first switch group 32b includes a first switch.

[0114] Based on the above design, by controlling the on / off state of the first switch group 32b and the first switch in the first switch group 32b, the power collected by the DC bus 317 of any one of the charging devices 31, including charging devices 31a, 31b and 31c, can be flexibly adjusted.

[0115] It should be understood that in practical applications, to maximize the power utilization of the multiple DC-DC converters 318 in the charging device 31, the sum of the rated output power of the multiple AC-DC converters 3111 is usually designed to be less than the sum of the rated output power of the multiple DC-DC converters 318. However, in practical applications, there may be situations where the output power of the charging gun 312 needs to meet the higher charging power requirements of electric vehicles, requiring the multiple DC-DC converters 318 in the charging device 31 to operate at full power. The aforementioned design would result in the total power output from the multiple AC-DC converters 3111 to the DC bus 317 being insufficient to meet the total input power required for the multiple DC-DC converters 318 to operate at full power.

[0116] Therefore, in this embodiment of the application, by connecting the DC bus 317 of different charging devices 31 in the charging system 30 through the first switch group 32, the output power of the AC-DC converter 3111 of different charging devices 31 can be shared, so as to flexibly adjust the total input power of the DC-DC converter 318 of any charging device 31 in the charging system 30.

[0117] Furthermore, since the output power of the AC-DC converters 3111 of different charging devices 31 can be shared, the AC-DC converters 3111 of each charging device 31 in the charging system 30 can be normalized to a low power level. This reduces the design and manufacturing complexity of the charging devices 31 and optimizes their management and maintenance costs. Moreover, compared to designing the AC-DC converters 3111 according to high power specifications, a low-power AC-DC converter 3111 is more conducive to reducing the production cost of the charging devices 31.

[0118] Figure 6 This is another example provided in the embodiments of this application. Figure 4 The diagram shows the specific structure of the charging system 30.

[0119] See Figure 6 In one embodiment, each charging device 31 further includes a DC bus 317, a plurality of AC-DC converters 319 and a power distribution device 3100. The power distribution device 3100 includes a plurality of power terminals 3110, a load terminal 3120, a connection terminal 3130 and a second switch group 3140. The plurality of charging modules 311 include a plurality of DC-DC converters 3112.

[0120] In each charging device 31, the output terminals of multiple AC-DC converters 3111 are connected to the input terminals of multiple DC-DC converters 318 via a DC bus 317. The output terminals of the multiple DC-DC converters 318 are connected one-to-one with multiple power supply terminals 3110, and the load terminal 3120 is connected to the charging gun 312. Furthermore, any two of each power supply terminal 3110, load terminal 3120, and connection terminal 3130 are connected via a second switch group 3140. The second switch group 3140 is used to connect or disconnect the circuit between any two of each power supply terminal 3110, load terminal 3120, and connection terminal 3130.

[0121] It should be understood that, in specific implementation, when there are multiple charging guns 312 in the charging device 31, there can also be multiple load terminals 3120 in the power distribution device 3100, and multiple load terminals 3120 are connected to multiple charging guns 312 in a one-to-one correspondence.

[0122] For detailed descriptions of AC-DC converter 319 and DC-DC converter 3112, please refer to [link / reference]. Figure 2 The relevant descriptions of the embodiments shown will not be repeated here.

[0123] Furthermore, the charging system 30 also includes a power sharing bus 33, which connects to the connection terminal 3130 in the power distribution device 3100 of each charging device 31 in the charging system 30. Thus, in each charging device 31, the output of the DC-DC converter 3112 can be connected to its own charging gun 312 via the power terminal 3110 and load terminal 3120 in the power distribution device 3100, or the output of the DC-DC converter 3112 can also be connected to the power sharing bus 33 via the power terminal 3110 and connection terminal 3130 in the power distribution device 3100. Additionally, the charging gun 312 can also be connected to the power sharing bus 33 via the load terminal 3120 and connection terminal 3130 in the power distribution device 3100.

[0124] Based on the above analysis, when the second switch group 3140 in one charging device 31 activates the circuit between the power terminal 3110 and the connection terminal 3130 in the power distribution device 3100, and the second switch group 3140 in another charging device 31 activates the circuit between the connection terminal 3130 and the load terminal 3120 in the power distribution device 3100, the output terminal of the DC-DC converter 3112 in one charging device 31 can be connected to the charging gun 312 of the other charging device 31 via the power sharing bus 33. Thus, power sharing among multiple DC-DC converters 3112 in different charging devices 31 can be achieved. Furthermore, since the output power of the DC-DC converters 3112 in different charging devices 31 can be shared, the DC-DC converter 3112 of each charging device 31 in the charging system 30 can be normalized to a low power level. This reduces the design and manufacturing difficulty of the charging devices 31 and optimizes the management and maintenance costs of the charging devices 31. Furthermore, compared to designing the DC-DC converter 3112 according to high-power specifications, a low-power DC-DC converter 3112 is more conducive to reducing the production cost of the charging device 31.

[0125] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A charging system, characterized by, The charging system includes multiple charging devices. Each charging device includes multiple charging modules, one or more charging guns, a communication module, and a controller. The output terminals of the multiple charging modules of each charging device are connected to each of the charging guns of the multiple charging devices. Each charging gun is used to connect to an electric vehicle. The communication module of the first charging device among the plurality of charging devices is communicatively connected to the charging management cloud platform. The communication modules of the other charging devices besides the first charging device are communicatively connected to the charging management cloud platform through the communication module of the first charging device. The controller of the first charging device is used to control the plurality of charging modules of at least one charging device to output power to the at least one charging gun when at least one charging gun of one of the plurality of charging devices is connected to an electric vehicle. When the communication module of the first charging device fails, the communication module of the second charging device among the other charging devices is connected to the charging management cloud platform. The communication module of each charging device other than the second charging device is connected to the charging management cloud platform through the communication module of the second charging device. When the controller of the first charging device fails, the controller of the third charging device among the other charging devices is used to control the plurality of charging modules of the at least one charging device to output power to the at least one charging gun when the at least one charging gun is connected to an electric vehicle; The second charging device and the third charging device are the same charging device.

2. The charging system of claim 1, wherein, When the sum of the rated output power of the plurality of charging modules of the one charging device is greater than or equal to the required charging power of the electric vehicle connected to the at least one charging gun, the at least one charging device includes the one charging device; or, When the sum of the rated output power of the plurality of charging modules of a charging device is less than the required charging power, the at least one charging device includes the one charging device and at least one other charging device among the plurality of charging devices.

3. The charging system according to claim 1 or 2, characterized in that, The one or more charging guns of the charging device include a plurality of charging guns; When the plurality of charging modules of a charging device output power to an electric vehicle through one of its charging guns, and when another charging gun of the charging device is connected to another electric vehicle, the at least one charging device includes the charging device and at least one other charging device among the plurality of charging devices, and the plurality of charging modules in the at least one other charging device are not in operation.

4. The charging system according to claim 1 or 2, characterized in that, Each charging device includes a charging host and a charging terminal. The plurality of charging modules and the communication module are disposed on the charging host, and the one or more charging guns are disposed on the charging terminal. The charging terminal of each charging device is communicatively connected to its own communication module. The charging terminal of each of the other charging devices is communicatively connected to the communication module of the first charging device through its own communication module; or... When the communication module of the first charging device malfunctions, the charging terminal of each charging device other than the second charging device communicates with the communication module of the second charging device through its own communication module.

5. The charging system according to claim 1 or 2, characterized by Each charging device further includes a DC bus and multiple DC-DC to DC-DC converters. The multiple charging modules include multiple AC-DC to DC converters. The output terminals of the multiple AC-DC converters of each charging device are connected to the input terminals of the multiple DC-DC converters of each device through their own DC bus. The output terminals of the multiple DC-DC converters of each charging device are connected to one or more charging guns of each device. The charging system also includes a switch group, through which the DC buses of the plurality of charging devices are connected; The switch group is used to disconnect or connect the circuit between the DC bus of any two of the plurality of charging devices.

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