Charging system

Abstract

The embodiment of the invention provides a charging system. The charging system 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 with the charging guns of the plurality of charging devices. The communication module of the first charging device in the multiple charging devices communicates with the charging management cloud platform, and the communication modules of the other charging devices except the first charging device communicate with the charging management cloud platform through the communication module of the first charging device. And when the communication module of the first charging device breaks down, the communication module of the second charging device in the other charging devices communicates with the charging management cloud platform, and the communication modules of the charging devices except 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. Therefore, power sharing among a plurality of charging modules of different charging devices can be realized, and the communication reliability of the plurality of charging devices can be improved.

Description

Technical Field

[0001] The present application relates to the field of charging, and more particularly, to a charging system. Background Art

[0002] With the acceleration of the dual-carbon strategy and the increase in the popularity of electric vehicles, the application of charging equipment as supporting facilities is becoming more and more extensive. At present, the output power requirements of charging equipment provided by different charging scenarios are generally different. For example, in the high-power charging station scenario, as users have higher and higher requirements for charging time, electric vehicles require higher output power provided by charging equipment, while in the low-power charging station scenario, in order to meet the low-power charging needs of ordinary electric vehicles, electric vehicles require lower output power provided by charging equipment.

[0003] In order to make the output power of the charging equipment meet the different charging power requirements of electric vehicles, the existing charging equipment usually configures charging modules with different power specifications in the cabinet. In addition, the cabinet size also has large differences due to the different power specifications of the charging modules. This results in the diverse product forms of the charging equipment, the difficulty in designing and processing the charging equipment, and the high management and maintenance costs of the charging equipment. Summary of the invention

[0004] The present application provides a charging system that can flexibly adjust the output power of the charging gun of each charging device by enabling power sharing among multiple charging devices in the charging system. This can enable the output power of the charging gun to meet different output power requirements while also achieving a normalized design of the charging modules of multiple charging devices. Furthermore, the design and processing difficulty of the charging equipment can be reduced, and the management and maintenance costs of the charging equipment can be optimized. In addition, by enabling multiple charging devices in the charging system to adopt the "master-standby node + sentinel mode" method for communication management, the communication reliability of the charging system can be improved.

[0005] In the first aspect, a charging system is provided, which includes a plurality of charging devices, each of which includes a plurality of charging modules, one or more charging guns and a communication module. The output ends of the plurality of charging modules of each charging device are connected to each charging gun of the plurality of charging devices, and each charging gun is used to connect an electric vehicle. The communication module of the first charging device among the plurality of charging devices is communicatively connected to a charging management cloud platform, and the communication modules of the other charging devices except 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 the second charging device among the other charging devices is communicatively connected to the charging management cloud platform, and the communication module of each charging device except the second charging device among the other charging devices is communicatively connected to the charging management cloud platform through the communication module of the second charging device.

[0006] In the charging system provided in the embodiment of the present application, multiple charging modules of each charging device can output power to the charging gun of any one of the multiple charging devices, so that power sharing between the charging modules of different charging devices can be achieved. In this way, the charging module of each charging device in the charging system can be normalized and designed according to the low-power specification. And in actual application, by allowing the charging gun of any charging device to call the output power of the charging modules of other charging devices, the output power of the charging gun of any charging device can be flexibly adjusted to meet different output power requirements. Furthermore, the design and processing difficulty of the charging equipment can be reduced, and the management and maintenance costs of the charging equipment can be optimized.

[0007] In addition, the communication module of the first charging device among the multiple charging devices acts as the main node when no failure occurs, and the communication modules of the other charging devices act as backup nodes, and the backup nodes are connected to the charging management cloud platform through the main node. When the communication module of the first charging device fails, the communication module of the second charging device among the other charging devices replaces the communication module of the first charging device as the new main node. That is, the multiple charging devices in the charging system use the "main and backup node + sentinel mode" method to manage the northbound communication network with the charging management platform. In this way, even if the communication module of the first charging device fails, the other charging devices can continue to communicate normally with the charging management cloud platform through the second charging device. This is conducive to improving 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 used to: when at least one charging gun of one charging device among the multiple charging devices is connected to an electric vehicle, control multiple charging modules of at least one charging device among the multiple charging devices to output power to the at least one charging gun. Alternatively, when the first controller of the first charging device fails, the controller of the third charging device among the other charging devices is used to: when at least one charging gun is connected to an electric vehicle, control multiple charging modules of at least one charging device to output power to the at least one charging gun.

[0009] Based on the above design, the controller of the first charging device among multiple charging devices can serve as the master node when no failure occurs, and is used to centrally control the power output of multiple charging devices, so that the charging system can charge electric vehicles in an orderly manner. When the controller of the first charging device fails, the controller of the third charging device can replace the controller of the first charging device as the new master node. That is, multiple charging devices in the charging system use the "master-standby node + sentinel mode" method 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, thereby 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 the controller of the first charging device as the master node fail, the new master node between the communication modules of the multiple charging devices and the new master node between the controllers of the multiple charging devices are located in the same charging device. In this way, the communication interaction of the controller as the master node in the process of centrally controlling the power output of multiple charging devices according to the charging instructions of the charging management cloud platform can be reduced, thereby improving the power output efficiency of multiple charging devices.

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

[0013] Based on the above design, when the sum of the rated output powers of multiple charging modules of a charging device can meet the total required charging power of all electric vehicles connected to its own charging gun, the controller as the master node can control the multiple charging modules of the charging device to output power to its own charging gun. When the sum of the rated output powers of multiple charging modules of the charging device cannot meet the total required charging power of all electric vehicles connected to its own charging gun, the controller as the master node can control the multiple charging modules of the charging device and other charging devices to output power to the charging gun connected to the electric vehicle in the charging device. In this way, the output power of the charging gun can be flexibly adjusted to meet the charging needs of electric vehicles.

[0014] In one embodiment, the 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 its own charging guns, when another charging gun of the charging device is connected to another electric vehicle, the at least one charging device includes a charging device and at least one charging device other than the one charging device among the multiple charging devices, and multiple charging modules in the at least one charging device other than the one charging device are not working.

[0015] Based on the above design, when multiple charging modules of a charging device charge an electric vehicle through a charging gun, when another charging gun of the charging device is connected to another electric vehicle, the controller as the main node can control the multiple charging modules of the charging device and other non-working charging devices to output power to the two charging guns together. In this way, the output power of the two charging guns can be flexibly adjusted to meet the charging needs of the electric vehicle. In addition, compared with directly increasing the output power of the multiple charging modules of the charging device to meet the charging needs of the electric vehicles connected to the two charging guns, by making the multiple charging modules of the charging device and other non-working charging devices output power together, the operating power of the multiple charging modules of the charging device can be reduced, thereby reducing the operating loss of the multiple charging modules. Furthermore, it is beneficial to improve the operating stability and service life of the multiple charging modules in the charging device.

[0016] In one embodiment, each charging device includes a charging host and a charging terminal, a plurality of charging modules and a communication module are arranged on the charging host, one or more charging guns are arranged on the charging terminal, and the charging terminal of each charging device is connected to its own communication module. The charging terminal of each charging device in other charging devices is connected to the communication module of the first charging device through its own communication module. Alternatively, when the communication module of the first charging device fails, the charging terminal of each charging device except the second charging device is connected to the communication module of the second charging device through its own communication module.

[0017] Based on the above design, the communication module of the first charging device among multiple charging devices acts as the main node when no failure occurs, and the communication modules of other charging devices act as backup nodes, and the charging terminals in other charging devices are connected to the main node through the backup nodes in their own charging devices. When the communication module of the first charging device fails, the communication module of the second charging device among other charging devices takes over the communication module of the charging device as the new main node, and the charging terminal of each charging device except the second charging device among other charging devices is connected to the new main node through the backup nodes in their own charging devices. That is, the communication modules in multiple charging devices manage the southbound communication network with the charging terminals in the "main and backup nodes + sentinel mode" mode. This is conducive to improving the communication reliability between multiple charging devices.

[0018] In one embodiment, each charging device further includes a DC bus and multiple DC-DC converters, and multiple charging modules include multiple AC-DC converters. The output ends of the multiple AC-DC converters of each charging device are connected to the input ends of its multiple DC-DC converters through its own DC bus, and the output ends of the multiple DC-DC converters of each charging device are connected to one or more charging guns of its own. The charging pile also includes a switch group, and the DC buses of the multiple charging devices are connected through the switch group, and the switch group is used to disconnect or conduct 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, when the switch group conducts the circuit between the DC bus of any charging device and the DC bus of other charging devices, the output power of the AC-DC conversion device of other charging devices can be transmitted to the DC-DC conversion device of any charging device through its own DC bus, the switch group and the DC bus of any charging device. In this way, the total input power of the DC-DC conversion device of any charging device can be flexibly adjusted so that the power output by the DC-DC conversion device of any charging device to the charging gun meets the required charging power of the electric vehicle. In addition, since the output power of the AC-DC conversion devices of different charging devices can be shared, in the charging system, the AC-DC conversion device of each charging device can be normalized and designed according to low power. This can reduce the design and processing difficulty of the charging equipment and optimize the management and maintenance cost of the charging equipment. In addition, compared with designing the AC-DC conversion device according to high-power specifications, a low-power AC-DC conversion device is more conducive to reducing the production cost of the charging equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of a scenario in which a charging device provided in an embodiment of the present application charges an electric vehicle.

[0021] Figure 2 This is an example provided in the embodiment of the present application. Figure 1 The specific structural schematic diagram of the charging device shown.

[0022] Figure 3 It is a structural schematic diagram of a charging system provided in an embodiment of the present application.

[0023] Figure 4 It is a structural schematic diagram of another charging system provided in an embodiment of the present application.

[0024] Figure 5 and Figure 6 An example provided in the embodiment of the present application is Figure 4 The specific structural schematic diagram of the charging system is shown. DETAILED DESCRIPTION

[0025] To facilitate understanding of the embodiments of the present application, the following points are explained before introducing the embodiments of the present application.

[0026] In the description of the embodiments of the present application, connection may refer to electrical connection. Electrical connection may be understood as the transmission of signals between two electrical components by direct electrical connection or indirect electrical connection. For example, A and B are electrically connected, which may be understood as A and B are directly electrically connected, or may be understood as A and B are indirectly electrically connected through one or more other electrical components.

[0027] In the embodiments of the present application, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may include one or more features either sensibly or implicitly. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two, and "at least one" and "one or more" refer to one, two or more than two.

[0028] In the description of the embodiments of the present application, unless otherwise specified, "and / or" is merely a description of 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.

[0029] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0030] First, to facilitate understanding of the technical solutions provided by the embodiments of the present application, application scenarios applicable to the embodiments of the present application are first introduced.

[0031] Figure 1 It is a schematic diagram of a scenario in which a charging device 10 provides charging for an electric vehicle 21 according to an embodiment of the present application.

[0032] Combination Figure 1 In (a) and (b), the charging device 10 is used to receive the AC power output by the power grid 22, and convert the AC power into stable DC power and then transmit it to the electric vehicle 21 to charge the electric vehicle 21. Alternatively, in some other embodiments, the electric vehicle 21 can also output electric energy to the power grid 22 through the charging device 10.

[0033] In some embodiments, Figure 1 As shown in (a) of FIG. 1 , 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 a plurality of charging modules (not shown in the figure), and the plurality of charging modules are used to convert the AC power outputted by the power grid 22 into stable DC power and then transmit it to the charging terminal 12. The plurality of charging modules may include an alternating current-direct current (AC-DC) conversion device and a direct current-direct current (DC-DC) conversion device. The specific description of the AC-DC conversion device and the DC-DC conversion device will be introduced below and will not be repeated here.

[0035] Each charging terminal 12 is connected to at least one of the 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 transmit the direct current output by multiple charging modules to the electric vehicle 21 through the connected charging gun 13. In a specific implementation, one electric vehicle 21 can be connected to one charging gun 13 or multiple charging guns 13.

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

[0037] It should also be understood that in the embodiment of the present application, the electric vehicle 21 is a vehicle driven by electric energy. The electric vehicle 21 is a pure electric vehicle (pure electric vehicle / battery electric vehicle, pure EV / battery EV), a hybrid electric vehicle (hybrid electric vehicle, HEV), a range extended electric vehicle (range extended electric vehicle, REEV) or a plug-in hybrid electric vehicle (plug-in hybrid electric vehicle, PHEV), etc.

[0038] In other embodiments, as shown in (b) of FIG. (1), the charging device 10 is an integrated charging device. Specifically, the human-machine interface, charging control unit, metering and billing unit, etc. in the charging device 10 are directly arranged in the charging host 11, so that 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 by the power grid 22 into stable DC power, and then directly transmit it to the electric vehicle 21 through the charging gun 13.

[0039] Below Figure 1 Taking the split charging pile shown in (a) as an example, the structure of the charging host 11 in the charging device 10 is further introduced.

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

[0041] See also Figure 2 The charging host 11 includes at least one AC-DC conversion device 111, at least one DC-DC conversion device 112, a DC bus 113 and a power distribution device 114. Figure 2 The example shows that the charging host 11 includes multiple AC-DC conversion devices 111 and multiple DC-DC conversion devices 112. Among them, multiple AC-DC conversion devices 111 and multiple DC-DC conversion devices 112 are installed in the cabinet of the charging host 11. The input end of each AC-DC conversion device 111 is connected to the power grid 22, and the output end of each AC-DC conversion device 111 is connected to the input end of each DC-DC conversion device 112 through a DC bus 113. The output end of each DC-DC conversion device 112 is connected to each charging terminal 12 in the charging device 10 through a power distribution device 114, and each charging terminal 12 is connected to a charging gun 13.

[0042] In a specific implementation, each AC-DC converter 111 is used to convert the AC power output by the power grid 22 into DC power and output it to the DC bus 113. Each DC-DC converter 112 is used to further convert the DC power obtained from the DC bus 113 into DC power suitable for the electric vehicle 21 and output it to the power distribution device 114. The power distribution device 114 is used to dynamically distribute the DC power output by each DC-DC converter 112 according to the actual charging power required by the electric vehicle 21, and transmit the distributed power to the charging gun 13 through the charging terminal 12, so that the power output by the charging gun 13 to the electric vehicle 21 meets the charging demand of the electric vehicle 21.

[0043] As described in the above background technology section, currently in different charging scenarios, the AC-DC converter 111 and the DC-DC converter 112 in the charging device 10 use different power specifications, and the cabinet size of the charging host 11 also has obvious differences. For example, in a high-power charging station scenario, the maximum rated output power of the entire charging host 11 is required to be 720kW or 480kW, and accordingly, the AC-DC converter 111 and the DC-DC converter 112 need to use larger power specifications. At the same time, in order to install the above-mentioned larger power specifications of the AC-DC converter 111 and the DC-DC converter 112, the cabinet size of the charging host 11 is larger. In the low-power charging station scenario, the maximum output power of the entire charging host 11 is required to be 320kW, and accordingly, the AC-DC converter 111 and the 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 described above, different output power requirements in different charging scenarios result in a variety of product forms of the charging device 10 , which leads to greater difficulty in designing and processing the charging device 10 , and higher management and maintenance costs of the charging device 10 .

[0045] Based on the above content, the present application provides a charging system that can flexibly adjust the output power of the charging gun of each charging device by enabling power sharing among multiple charging devices in the charging system. This can enable the output power of the charging gun to meet different output power requirements while also achieving a normalized design of the charging module of each charging device. Furthermore, the design and processing difficulty of the charging equipment can be reduced, and the management and maintenance costs of the charging equipment can be optimized. In addition, by enabling multiple charging devices in the charging system to adopt the "master-standby node + sentinel mode" method for communication management, the communication reliability of the charging system can be improved.

[0046] The following is a detailed description of the charging system provided by the embodiments of the present application in conjunction with the accompanying drawings. It should be noted that, for ease of description and understanding, in the accompanying drawings provided by the embodiments of the present application below, the power transmission line is represented by a solid line, and the signal transmission line is represented by a dotted line.

[0047] Figure 3 It is a structural schematic diagram of a charging system 30 provided in an embodiment of the present application.

[0048] See also Figure 3 , the charging system 30 includes a plurality of charging devices 31 , each of which includes a plurality of charging modules 311 and one or more charging guns 312 , for example Figure 3 It is shown by way of example that each charging device 31 includes a charging gun 312 .

[0049] Among them, the output ends 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 ends of the multiple charging modules 311 in 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 embodiment of the present application, the multiple charging modules 311 may be power conversion devices capable of outputting power to the charging gun 312. The multiple charging modules 311 may be, for example, multiple AC-DC conversion devices or multiple DC-DC conversion devices.

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

[0052] It should also be understood that in the embodiment of the present 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 embodiment of the present application is described by taking each charging device 31 as an example including one charging gun 312.

[0053] Based on the above design, the multiple charging modules 311 in each charging device 31 can output power to the charging gun 312 of any one of the multiple charging devices 31, so that power sharing between the charging modules 311 of different charging devices 31 can be achieved. In this way, the charging module 311 of each charging device 31 in the charging system 30 can be normalized and designed according to the low-power specification. In actual application, when the charging power required by the electric vehicle connected to its own charging gun 312 is small, the charging device 31 can output power to its own charging gun 312 through its own charging module 311 to meet the charging demand of the electric vehicle. Alternatively, when the charging power required by the electric vehicle connected to its own charging gun 312 is large, the charging device 31 can also call the output power of multiple charging modules 311 of other charging devices 31 to make the output power of its own charging gun 312 meet the charging demand of the electric vehicle. Furthermore, the design and processing difficulty of the charging device 31 can be reduced, and the management and maintenance cost of the charging device 31 can be optimized. In addition, compared with 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 volume of the cabinet used to install the charging module 311, thereby facilitating the transportation and installation of the charging device 31.

[0054] Continue reading Figure 3 Each charging device 31 further includes a first communication module 313, and each charging device 31 is connected to a device other than itself through the first communication module 313. For example, each charging device 31 in the charging system 30 is connected to the first communication module 313 of each other charging device 31 through its own first communication module 313.

[0055] In addition, the multiple charging devices 31 of the charging system 30 include a first charging device. The first communication module 313 of the first charging device is connected to the charging management cloud platform 40 for communication, and the first communication modules 313 of the other charging devices 31 except the first charging device among the multiple charging devices 31 are connected to the charging management cloud platform 40 for communication via the first communication module 313 of the first charging device.

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

[0057] Specifically, Figure 3The charging system 30 shown includes three charging devices 31 as an example, that is, the charging system 30 includes charging device 31a, charging device 31b and charging device 31c as an example, and charging device 31a is used as the first charging device. Among them, when the charging device 31a is not faulty, the first communication module 313 of the charging device 31a serves as the main node among the first communication modules 313 of the three charging devices 31, and is used to establish a communication connection with the charging management cloud platform 40. The first communication modules 313 in the charging devices 31b and 31c serve as the backup nodes among the first communication modules 313 of the three charging devices 31, and are used to communicate and interact with the charging management cloud platform 40 through the main node. That is, in the charging system 30, the three charging devices 31 use the "main and backup node" mode to communicate and interact with the charging management cloud platform 40.

[0058] And in the specific implementation, the first communication module 313 of the charging device 31b and the charging device 31c serving as the backup node can periodically send its own data information to the first communication module 313 of the charging device 31a serving as the main node. At the same time, the first communication module 313 of the charging device 31a periodically sends the received data information of the charging device 31b and the charging device 31c and its own data information to the charging management cloud platform 40.

[0059] Exemplarily, the data information sent by the charging device 31a to the charging management cloud platform 40 may include the current output voltage, current, power, power, charging mode, the tip temperature of the charging gun 312, the required charging power of the electric vehicle connected to the charging gun 312, various fault positions, alarm status, etc. of each charging device 31 in the charging system 30. In this way, the charging management cloud platform 40 can monitor the working 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] Exemplarily, the first communication modules 313 of any two charging devices 31 can be connected to each other by wired communication, for example, by controller area network (CAN) wiring. In addition, the first communication module 313 of the charging device 31 as the master node can be connected to the charging management cloud platform 40 by wired connection and wireless connection. The wireless connection can be, for example, a communication connection established by a wireless network such as the 4th generation mobile communication technology (4G) and the 5th generation mobile communication technology (4G). The wired connection can be, for example, a wired communication connection established by fast Ethernet (FE).

[0061] Continue reading Figure 3 , when the first communication module 313 of the first charging device fails, the other charging devices 31 except the first charging device among the multiple charging devices 31 include a second charging device. The first communication module 313 of the second charging device is connected to the charging management cloud platform 40 for communication, and the first communication module 313 of each charging device 31 except the second charging device among the other charging devices 31 is connected to the charging management cloud platform 40 for communication through the first communication module 313 of the second charging device.

[0062] Specifically, when the first communication module 313 of the first charging device serves as the master node, the first communication modules 313 of other charging devices 31 except the first charging device serve as backup nodes, and are also used to monitor whether the master node fails. When the master node fails, the first communication modules of other charging devices 31 except 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 case, the standby node can automatically switch the master node from the first communication module 313 of the first charging device to the first communication module 313 of the second charging device through election. Among them, the second charging device can be a charging device 31 whose first communication module 313 is not faulty and can establish a communication connection with the charging management cloud platform 40. That is to say, in the charging system 30, multiple charging devices 31 use the "master-standby node + sentinel mode" method to manage the northbound communication network with the charging management cloud platform 40. In this way, even if the first communication module 313 of the first charging device fails, other charging devices 31 in the charging system 30 can continue to communicate normally with the charging management cloud platform 40 through the second charging device. Furthermore, the communication reliability between the charging system 30 and the charging management cloud platform 40 can be improved.

[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 used to control the multiple charging modules 311 of at least one charging device 31 among the multiple charging devices 31 to output power to the at least one charging gun 312 when the at least one charging gun 312 of one charging device 31 among the multiple charging devices 31 is connected to the electric vehicle.

[0065] Specifically, when the first controller 314 of the first charging device does not fail, the first controller 314 of the first charging device can serve as a master node among the first controllers 314 of the 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 among the multiple charging devices 31 except the first charging device serve as standby nodes, and are used to execute control instructions of the master node.

[0066] For example, still Figure 3 The charging system 30 shown includes a charging device 31a, a charging device 31b and a charging device 31c, and the charging device 31a is taken as the first charging device as an example, the first controller 314 of the charging device 31a has not failed and serves as the main node, and the first controllers 314 of the charging devices 31b and 31c serve as backup nodes. When the charging gun 312b of the charging device 31b is connected to the electric vehicle, the first controller 314 of the charging device 31b can receive the charging demand information sent by the electric vehicle through its own first communication module 313 after confirming that the charging gun 312b and the electric vehicle are connected, and forward the received information to the first communication module 313 of the charging device 31a. The first communication module 313 of the charging device 31a can send the received information to the first controller 314 of the 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, the output power that the charging modules 311 can provide, and other data information 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 required charging power of the electric vehicle connected to the charging gun 312b, the first controller 314 of the charging device 31a can send a power output instruction to the charging device 31b through its own first communication module 313. Further, the charging device 31b controls its own multiple charging modules 311 to output power to the charging gun 312b according to the received power output instruction. In this way, the charging system 30 can realize orderly charging of electric vehicles while meeting the required charging power of electric vehicles.

[0069] Exemplarily, the first communication module 313 and the first controller 314 in each charging device 31 may be integrated into the same hardware, or the first communication module 313 and the first controller 314 may be provided in different hardware. For ease of description and understanding, the present embodiment of the application is described by taking the example that the first communication module 313 and the first controller 314 may be provided in different hardware.

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

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

[0072] In this case, the standby node can switch the master node from the first controller 314 of the first charging device to the first controller 314 of the third charging device by means of election. The third charging device can be a charging device 31 in which the first controller 314 is not faulty. That is to say, in the charging system 30, multiple charging devices 31 use the "master-standby node + sentinel mode" method to centrally control the power output of multiple charging devices 31. In this way, even if the first controller 314 of the first charging device fails, it will not affect the centralized control of the power output of multiple charging devices 31, thereby ensuring the operational reliability of the charging system 30.

[0073] In one embodiment, the third charging device and the second charging device may 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 as the master node fail, a new master node between the first communication modules 313 of the plurality of charging devices 31 and a new master node between the first controllers 314 of the plurality of 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 first controller as the master node centrally controls the power output of multiple charging devices 31 according to the charging instructions of the charging management cloud platform 40. In this process, 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.

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

[0076] Based on the above analysis, by setting the first communication module 313 and the first controller 314 as the new main node in the same charging device 31, the communication interaction of the first controller 314 as the main node in the process of centralized control of 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 a charging device 31 among multiple charging devices 31 is connected to an electric vehicle, the first controller 314 serving as a master node is used to control multiple charging modules 311 of at least one charging device 31 among 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 powers of the multiple charging modules 311 of the one 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 charging device 31 among the multiple charging devices 31 includes the one charging device 31. Alternatively, when the sum of the rated output powers of the multiple charging modules 311 of the one 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 charging device 31 among the multiple charging devices 31 includes the one charging device 31 and at least one charging device 31 among the multiple charging devices 31 except the one charging device 31.

[0079] Specifically, Figure 3 Taking the charging device 31a shown as the first charging device, and the first controller 314 of the first charging device as the main node, and the first controllers 314 of the charging devices 31b and 31c as the 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 powers 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 meet the charging needs of the electric vehicle by controlling the multiple charging modules 311 of the charging device 31b to output power to the charging gun 312b.

[0080] Exemplarily, the first controller 314 of the charging device 31a may send a message for indicating the output power to the first communication module 313 of the charging device 31b through its own first communication module 313. The first communication module 313 of the charging device 31b may send the received message to its own first controller 314. In this way, the first controller 314 of the charging device 31b may control its own multiple charging modules 311 to output power to the charging gun 312b according to the message instructions.

[0081] When the sum of the rated output powers of the multiple charging modules 311 of the charging device 31b is less than the required charging power of the electric vehicle connected to the charging gun 312b, the first controller 314 of the charging device 31a can determine to share the output power of at least one of the charging device 31a and the charging device 31c with the charging device 31b based on the data information of the charging device 31a and the charging device 31c, for example, based on the current output power of the multiple charging modules 311 of the charging device 31a and the charging device 31c. For example, when confirming that the charging power of the charging device 31c is shared with the charging device 31b, the first controller 314 of the charging device 31a can simultaneously send a power output message to the charging device 31b and the first communication module 313 of the charging device 31c through its own first communication module 313, and control the circuit between the multiple charging modules 311 of the charging device 31c and the charging gun 312b to conduct, so that the charging modules 311 of the charging device 31b and the charging device 31c output power to the charging gun 312b together. In this way, the output power of the charging gun 312b can be increased, which is helpful to meet the charging needs of electric vehicles.

[0082] In the above technical solution, when the sum of the rated output powers of the multiple charging modules of any one charging device 31 in the charging system 30 can meet the total required charging power of all electric vehicles connected to its own charging gun 312, the first controller 314 as the master node can control the multiple charging modules 311 of any one charging device 31 to output power to the charging gun 312 connected to the electric vehicle. When the sum of the rated output powers of the multiple charging modules 311 of any one charging device 31 cannot meet the total required charging power of all electric vehicles connected to its own charging gun 312, the first controller 314 as the master node can control the multiple charging modules 311 of the one charging device 31 and other charging devices 31 to output power to the charging gun 312 connected to the electric vehicle in any one charging device 31. In this way, the output power of the charging gun 312 can be flexibly adjusted to meet the charging needs of the electric vehicle.

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

[0084] The one charging device 31 includes a plurality of charging guns 312. When the multiple charging modules 311 of the one charging device 31 output power to an electric vehicle through one of its own charging guns 312, when another charging gun 312 of the one charging device 31 is connected to another electric vehicle, at least one of the multiple charging devices 31 includes the one charging device 31 and at least one charging device 31 other than the one charging device 31 among the multiple charging devices 31, and the multiple charging modules 311 in at least one charging device 31 other than the one charging device 31 are not working.

[0085] Specifically, Figure 3 The charging device 31a shown is used as the first charging device, and the first controller 314 of the first charging device is used as the main node, and the first controllers 314 of the charging devices 31b and 31c are used as the backup nodes. For example, the charging device 31b includes multiple charging guns 312. Among them, when the multiple charging modules 311 of the charging device 31b output power to an electric vehicle through one of its own charging guns 312, another charging gun 312 of the charging device 31b is connected to another vehicle to be charged. In this case, if the multiple charging modules 311 of the charging device 31c are not working, the first controller 314 of the charging device 31a can control the multiple charging modules 311 in the charging device 31b and the charging device 31c to output power to the two charging guns 312 in the charging device 31b connected to the electric vehicle.

[0086] Thus, 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 thereto. In addition, when another charging gun 312 of the charging device 31b is connected to another vehicle to be charged, although the charging needs of the electric vehicles connected to the two charging guns 312 may be met by directly increasing the output power of the multiple charging modules 311 of the charging device 31b, the operating power of the multiple charging modules 311 of the charging device 31b is relatively high at this time. In the embodiment of the present application, by making the multiple charging modules 311 of the charging device 31b and the non-working 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 loss of the multiple charging modules 311. Furthermore, it is beneficial to improve the operating stability and service life of the multiple charging modules 311.

[0087] It should be understood that in the embodiment of the present application, each charging device 31 in the charging system 30 may be Figure 1 The split charging device shown in (a) of FIG. 1 , or it may be Figure 1 The integrated charging device shown in (b) in FIG.

[0088] For example, in one embodiment, Figure 3 As shown, each charging device 31 of the charging system 30 further includes a charging host 315. Among them, multiple charging modules 311, charging guns 312, first communication modules 313 and first controllers 314 are all arranged 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 device 31, and 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] Exemplarily, 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 the electric vehicle, the first communication module 313 can communicate and interact with the electric vehicle through the communication plug of the charging gun 312.

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

[0092] For details about the integrated charging device mentioned above, please refer to Figure 1 The relevant description of the embodiment shown in (b) will not be repeated here.

[0093] In another embodiment, see Figure 4 , Figure 4 It is a structural schematic diagram of another charging system 30 provided in an embodiment of the present application.

[0094] and Figure 3 The embodiment shown is different in that Figure 4In the charging system 30 shown, each charging device 31 includes a charging terminal 316 in addition to a charging host 315. Among them, multiple charging modules 311 and a first communication module 313 are arranged in the charging host 315, and one or more charging guns 312 are arranged in the charging terminal 316. That is, the charging device 31 is a split charging device. In addition, the charging terminal 316 in each charging device 31 is also connected to the first communication module 313 of itself.

[0095] Specifically, the charging terminal 316 of each charging device 31 includes a second communication module 3161, and the second communication module 3161 in the same charging device 31 is connected to the first communication module 313. That is, the charging host 315 and the charging terminal 316 in the same charging device 31 are connected to each other. In addition, the second communication module 3161 is also used to communicate with the electric vehicle. For example, the second communication module 3161 can be connected to the electric vehicle through the communication plug in the charging gun 312 of the charging terminal 316 where the second communication module 316 is located. As a result, the first communication module 313 in 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 charging device 31 in other charging devices 31 except the first charging device is 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 fails, in other charging devices 31 except the first charging device, the charging terminal 316 of each charging device 31 except the second charging device is connected to the communication module 313 of the second charging device through its own communication module 313.

[0097] For example, Figure 4 The charging system 30 shown includes a charging device 31a, a charging device 31b and a charging device 31c, and taking the charging device 31a as the first charging device as an example, when the first communication module 313 of the charging device 31a serves as the main node and the first communication modules 313 of the charging devices 31b and 31c serve as the backup nodes, the second communication module 3161 in the charging device 31b communicates with the first communication module 313 of the charging device 31a through the first communication module 313 of the charging device 31b, and the second communication module 3161 in the charging device 31c communicates with the first communication module 313 of the charging device 31a through the first communication module 313 of the charging device 31c.

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

[0099] When the first communication module 313 of the charging device 31a fails, the first communication module 313 of the charging device 31b can replace the first communication module 313 of the charging device 31a as a new master node. The first communication module 313 of the charging device 31c serves as a backup node, and the second communication module 3161 of the charging device 31c is connected to the first communication module 313 of the charging device 31b through the first communication module 313 of the charging device 31c.

[0100] Based on the above analysis, in the charging system 30, the first communication modules 313 of the multiple charging devices 31 use the "master-standby node + sentinel mode" method to manage the southbound communication network with the second communication module 3161. That is, the charging host 315 of the multiple charging devices 31 uses the "master-standby node + sentinel mode" method to manage the southbound communication network with the charging terminal 316. This is conducive to improving the communication reliability between the multiple charging devices 31 in the charging system 30.

[0101] In some embodiments, continue to refer to Figure 4 The first controller 314 of each charging device 31 is also arranged 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 instructions of the first controller 314 in the charging device 31 where it is located.

[0102] It should be understood that the above-mentioned details about the split charging device can be found in Figure 1 The relevant description of the embodiment shown in (a) will not be repeated here.

[0103] The specific manner in which the output ends 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 is exemplarily described below.

[0104] Figure 5This is an example provided in the embodiment of the present application. Figure 4 A schematic diagram of the specific structure of the charging system 30 is shown.

[0105] See also Figure 5 In one embodiment, each charging device 31 further includes a DC bus 317 and multiple DC-DC converters 318, and multiple charging modules 311 include multiple AC-DC converters 3111. The output ends of the multiple AC-DC converters 3111 of each charging device 31 are connected to the input ends of the multiple DC-DC converters 318 through their own DC bus 317, and the output ends of the multiple DC-DC converters 318 of each charging device 31 are connected to one or more charging guns 312. For example, Figure 5 It is exemplarily shown that each charging device 31 includes a charging gun 312 , and the output ends of the multiple DC-DC conversion devices 318 of each charging device 31 are connected to its own charging gun 312 .

[0106] In each charging device 31, each AC-DC conversion device 3111 is used to convert the AC power output by the AC power supply into DC power and output it to the DC bus 317, and each DC-DC conversion device 318 is used to obtain DC power from the DC bus 317, and 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, and the output end of each DC-DC converter 318 in the charging device 31 is connected to the charging gun 312 through the power distribution device 3100. The power distribution device 3100 is used to dynamically distribute the power output by each DC-DC converter 318.

[0108] It should be understood that in specific implementation, Figure 4 and Figure 5 , multiple DC-DC conversion devices 318, multiple AC-DC conversion devices 3111 and power distribution device 3100 are all arranged in the charging host 315 of the charging device 31. For a detailed description, please refer to Figure 2 The relevant description of the illustrated embodiment will not be repeated here.

[0109] Continue reading Figure 5 The charging system 30 further includes a first switch group 32, through which the DC buses 317 of the plurality of charging devices 31 are connected, and the first switch group 32 is used to disconnect or connect the circuit between the DC buses 317 of any two charging devices 31 among the plurality of 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 ends of the multiple AC-DC conversion devices 3111 of any charging device 31 can be connected to the input ends of the multiple DC-DC conversion devices 318 of other charging devices 31 through the interconnected DC bus 317, thereby connecting the charging gun 312 of another charging device 31 through the multiple DC-DC conversion devices 318 of another charging device 31. In this way, the output power of the AC-DC conversion device 3111 of any charging device 31 can be transmitted to the charging gun 312 of other charging devices 31 through the interconnected DC bus 317, so that power sharing between different charging devices 31 can be achieved.

[0111] It should be understood that, in a specific implementation, the number of the 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, Figure 5 Taking the charging system 30 shown as including the charging device 31a, the charging device 31b and the charging device 31c as an example, the charging system 30 also includes two groups of first switch groups 32, namely, the first switch group 32a and the first switch group 32b. Among them, the DC bus 317 of the charging device 31a is connected to one end of the DC bus 317 of the charging device 31b through the first switch group 32a, and the other end of the DC bus 317 of the charging device 31b is connected to the DC bus 317 of the charging device 31c through the first switch group 32b. As a result, the DC buses 317 of the charging devices 31a, 31b and 31c are interconnected in sequence through the first switch group 32a and the first switch group 32b.

[0113] Exemplarily, the first switch group 32a and the first switch group 32b each include 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 charging device 31 among the charging device 31a, the charging device 31b and the charging device 31c can be flexibly adjusted.

[0115] It should be understood that in actual application, in order to maximize the power utilization of multiple DC-DC converters 318 in the charging device 31, the sum of the rated output powers of multiple AC-DC converters 3111 is usually designed to be less than the sum of the rated output powers of multiple DC-DC converters 318. However, in actual application, in order to make the output power of the charging gun 312 meet the higher required charging power of the electric vehicle, it may be necessary for multiple DC-DC converters 318 of the charging device 31 to operate at full power. The above design will result in the total power output from multiple AC-DC converters 3111 of the charging device 31 to the DC bus 317 being insufficient to meet the total input power required when multiple DC-DC converters 318 are running at full power.

[0116] Therefore, in the embodiment of the present 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 conversion device 3111 of different charging devices 31 can be shared to flexibly adjust the total input power of the DC-DC conversion device 318 of any charging device 31 in the charging system 30.

[0117] In addition, 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 designed in a normalized manner according to low power. This can reduce the design and processing difficulty of the charging device 31 and optimize the management and maintenance cost of the charging device 31. In addition, compared with designing the AC-DC converter 3111 according to high power specifications, the low-power AC-DC converter 3111 is more conducive to reducing the production cost of the charging device 31.

[0118] Figure 6 This is another example provided in the embodiment of the present application. Figure 4 A schematic diagram of the specific structure of the charging system 30 is shown.

[0119] See also Figure 6 In one embodiment, each charging device 31 also includes a DC bus 317, multiple AC-DC conversion devices 319 and a power distribution device 3100, the power distribution device 3100 includes multiple power terminals 3110, load terminals 3120, connection terminals 3130 and a second switch group 3140, and the multiple charging modules 311 include multiple DC-DC conversion devices 3112.

[0120] In each charging device 31, the output ends of the multiple AC-DC conversion devices 3111 are connected to the input ends of the multiple DC-DC conversion devices 318 through the DC bus 317, the output ends of the multiple DC-DC conversion devices 318 are connected to the multiple power terminals 3110 in a one-to-one correspondence, and the load terminal 3120 is connected to the charging gun 312. In addition, any two of each power terminal 3110, load terminal 3120 and connection terminal 3130 are connected through the second switch group 3140. The second switch group 3140 is used to turn on or off the circuit between any two of each power terminal 3110, load terminal 3120 and connection terminal 3130.

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

[0122] For detailed description of the AC-DC converter 319 and the DC-DC converter 3112, please refer to Figure 2 The relevant description of the illustrated embodiment will not be repeated here.

[0123] In addition, the charging system 30 further includes a power sharing bus 33, which connects the connection terminals 3130 in the power distribution device 3100 of each charging device 31 in the charging system 30. In this way, in each charging device 31, the output end of the DC-DC conversion device 3112 can be connected to its own charging gun 312 through the power terminal 3110 and the load terminal 3120 in the power distribution device 3100, or the output end of the DC-DC conversion device 3112 can also be connected to the power sharing bus 33 through the power terminal 3110 and the connection terminal 3130 in the power distribution device 3100. In addition, the charging gun 312 can also be connected to the power sharing bus 33 through the load terminal 3120 and the 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 conducts 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 conducts the circuit between the connection terminal 3130 and the load terminal 3120 in the power distribution device 3100, the output end of the DC-DC conversion device 3112 in one charging device 31 can be connected to the charging gun 312 of another charging device 31 through the power sharing bus 33. In this way, power sharing of multiple DC-DC conversion devices 3112 between different charging devices 31 can be achieved. In addition, since the output power of the DC-DC conversion devices 3112 of different charging devices 31 can be shared, the DC-DC conversion device 3112 of each charging device 31 in the charging system 30 can be normalized and designed according to low power. This can reduce the design and processing difficulty of the charging device 31 and optimize the management and maintenance cost of the charging device 31. In addition, compared with 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 is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A charging system, characterized in that: The charging system comprises a plurality of charging devices, each of the plurality of charging devices comprises a plurality of charging modules, one or more charging guns and a communication module, the output end of the plurality of charging modules of each charging device is connected to each of the charging guns of the plurality of charging devices, and each of the charging guns is used to connect to an electric vehicle; The communication module of the first charging device among the multiple charging devices is connected to the charging management cloud platform for communication, and the communication modules of the other charging devices except the first charging device are connected to the charging management cloud platform for communication through the communication module of the first charging device; or When the communication module of the first charging device fails, the communication module of the second charging device among the other charging devices is communicatively connected to the charging management cloud platform, and the communication module of each charging device among the other charging devices except the second charging device is communicatively connected to the charging management cloud platform through the communication module of the second charging device.

2. The charging system according to claim 1, characterized in that: Each of the charging devices also includes a controller; The controller of the first charging device is used to: when at least one charging gun of one of the multiple charging devices is connected to an electric vehicle, control the multiple charging modules of at least one of the multiple charging devices to output power to the at least one charging gun; or, 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 multiple 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.

3. The charging system according to claim 2, characterized in that: The second charging device and the third charging device are the same charging device.

4. The charging system according to claim 2 or 3, characterized in that: When the sum of the rated output powers of the multiple 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 rated output powers of the multiple charging modules of the one charging device is less than the required charging power, the at least one charging device includes the one charging device and at least one charging device among the multiple charging devices except the one charging device.

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

6. The charging system according to any one of claims 1 to 5, characterized in that: Each charging device comprises a charging host and a charging terminal, the multiple charging modules and the communication module are arranged on the charging host, the one or more charging guns are arranged on the charging terminal, and the charging terminal of each charging device is communicatively connected with its own communication module; The charging terminal of each of the other charging devices is 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 fails, the charging terminal of each charging device except the second charging device is communicatively connected with the communication module of the second charging device through its own communication module.

7. The charging system according to any one of claims 1 to 6, characterized in that: Each charging device further comprises a DC bus and a plurality of DC-DC conversion devices, the plurality of charging modules comprise a plurality of AC-DC conversion devices, the output ends of the plurality of AC-DC conversion devices of each charging device are connected to the input ends of the plurality of DC-DC conversion devices of the same through the DC bus of the same, and the output ends of the plurality of DC-DC conversion devices of the same are connected to the one or more charging guns of the same; The charging pile further includes a switch group, and the DC busbars 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 bus bars of any two charging devices among the multiple charging devices.

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