Power distribution architecture of charging station and charging system

Abstract

The utility model provides a power distribution architecture of a charging station and a charging system, a first charging unit comprises at least one first charging module, and a second charging unit comprises at least two second charging modules; the output end of each first charging module is electrically connected with the input ends of all the second charging modules; the second charging modules in the second charging unit are alternately and electrically connected to form an annular charging circuit; the input end of the first charging module and the input end of the second charging module are electrically connected with the charging host. And the charging terminal is electrically connected with the output end of the second charging module. The first charging module can uniformly distribute power to each second charging module or distribute power to each second charging module as required, so that matrix distribution of the power is realized. Through a mode of combining matrix power distribution and annular power distribution, efficient, flexible and balanced distribution of power is realized, and the charging efficiency and the energy utilization efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, and in particular to a power distribution architecture of a charging station and a charging system. BACKGROUND

[0002] With the rapid development of the electric vehicle market, the charging power of electric vehicles becomes higher and higher, and the charging time becomes shorter and shorter. As an important part of charging facilities, the charging efficiency and stability of DC super charging piles are directly related to user experience and the operation efficiency of charging stations. At present, in the split structure commonly used in the industry, the power distribution between the main machine and the charging terminal is a key technical problem. The existing power distribution method often relies on a large number of contactors to achieve this, which not only increases the cost and maintenance difficulty of the equipment, but also easily causes power blockage in the power distribution process, resulting in low power distribution for some charging terminals, which may further cause low charging efficiency. Therefore, how to improve the charging efficiency of the charging station on the basis of reducing the number of contactors has become a problem to be solved. SUMMARY

[0003] The present disclosure provides a power distribution architecture of a charging station and a charging system. The main purpose is to improve the charging efficiency of the charging station on the basis of reducing the number of contactors.

[0004] According to a first aspect of the present disclosure, a power distribution architecture of a charging station is provided, comprising: a first charging unit, a second charging unit, a charging terminal, and a charging main machine.

[0005] The first charging unit comprises at least one first charging module, and the second charging unit comprises at least two second charging modules; the output end of each first charging module is respectively electrically connected with the input end of all second charging modules; the second charging modules in the second charging unit are alternately electrically connected to form a ring-shaped charging circuit.

[0006] The input end of the first charging module and the input end of the second charging module are respectively electrically connected with the charging main machine; and the output end of the second charging module is electrically connected with the charging terminal.

[0007] In some embodiments, the output end of one second charging module is electrically connected with the input end of another second charging module in the second charging unit, to form a forward power transmission path.

[0008] In some embodiments, the input end of one second charging module is electrically connected with the output end of another second charging module in the second charging unit, to form a reverse power transmission path.

[0009] In some embodiments, the forward power transmission path and the reverse power transmission path are constructed between at least two of the second charging modules, forming the ring-shaped charging circuit.

[0010] In some embodiments, the connection circuit between the first charging module and the second charging module is provided with a DC contactor; the connection circuit between the second charging modules in the ring-shaped charging circuit is provided with the DC contactor.

[0011] In some embodiments, the charging terminal comprises one first charging gun or two second charging guns.

[0012] The first charging gun is electrically connected to two of the second charging modules, and the second charging gun is electrically connected to one of the second charging modules.

[0013] In some embodiments, no forward power transmission path and reverse power transmission path are constructed between the two second charging modules connected by the first charging gun.

[0014] In some embodiments, the first charging module comprises one charging sub-module, and the second charging module comprises two charging sub-modules.

[0015] According to a second aspect of the present disclosure, a charging system is provided, comprising: a power distribution architecture of the charging station according to the first aspect; and a communication control unit.

[0016] The input end of the communication control unit is connected to the charging host, and the output end is connected to the DC contactor, for controlling the connection and disconnection of the first charging module and / or the second charging module and the charging terminal.

[0017] In some embodiments, the charging system further comprises: a power detection unit.

[0018] The power detection unit is connected to the first charging unit, the second charging unit, the charging terminal and the charging host respectively, for detecting the output power of the first charging module and / or the second charging module, and the output power of the charging terminal.

[0019] The power distribution architecture of the charging station and the charging system are provided, which comprises a first charging unit, a second charging unit, a charging terminal, and a charging host. The first charging unit comprises at least one first charging module, and the second charging unit comprises at least two second charging modules. The output end of each first charging module is electrically connected with the input end of all second charging modules. The second charging modules in the second charging unit are alternately electrically connected to form a ring charging circuit. The input end of the first charging module and the input end of the second charging module are electrically connected with the charging host. The output end of the second charging module is electrically connected with the charging terminal. Compared with the related art, the output end of at least one first charging module in the first charging unit is electrically connected with the input end of all second charging modules, so that the matrix power distribution is realized. The first charging module can uniformly or on-demand distribute power to any second charging module according to the need, so that the shared use is realized to reduce the number of contactors. In this way, not only the charging demand of multiple charging terminals can be met, but also the power utilization efficiency and the charging efficiency can be improved through the dynamic adjustment according to the real-time charging state of each charging terminal. In the ring charging circuit, the power can be distributed among the second charging modules, and the first charging module can supply power to the second charging module, so that the situation that some charging terminals are in power surplus or deficiency can be avoided. Through the combination of the matrix power distribution and the ring power distribution, the charging efficiency and the energy utilization efficiency can be improved while the number of contactors is reduced.

[0020] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are used to better understand the present scheme and do not limit the present disclosure. Among them:

[0022] Figure 1 A structure schematic diagram of the power distribution architecture of the charging station is provided for the embodiments of the present disclosure;

[0023] Figure 2 A structure schematic diagram of another power distribution architecture of the charging station is provided for the embodiments of the present disclosure;

[0024] Figure 3 A connection principle schematic diagram of each charging module is provided;

[0025] Figure 4 A structure schematic diagram of the charging system is provided for the embodiments of the present disclosure. DETAILED DESCRIPTION

[0026] Exemplary embodiments of the present disclosure are described herein with reference to the accompanying drawings, which are meant to be exemplary in nature, and include various details intended to facilitate understanding of the present disclosure. Accordingly, it should be understood that various changes and modifications to the embodiments described herein can be made by those having ordinary skill in the art without departing from the scope and spirit of the present disclosure. Also, for the purpose of clarity and a concise description, descriptions of well-known functions and constructions can be omitted from the following description.

[0027] Figure 1 A structural schematic diagram of a power distribution architecture of a charging station according to an embodiment of the present disclosure is provided, which includes a first charging unit 11, a second charging unit 12, a charging terminal 13, and a charging host 14.

[0028] The first charging unit 11 includes at least one first charging module 111, and the second charging unit 12 includes at least two second charging modules 121. The output end of each first charging module 111 is electrically connected to the input end of all second charging modules 121. The second charging modules 121 in the second charging unit 12 are alternately electrically connected to form a ring charging circuit.

[0029] The input end of the first charging module 111 and the input end of the second charging module 121 are electrically connected to the charging host 14. The output end of the second charging module 121 is electrically connected to the charging terminal 13.

[0030] The power distribution architecture of the charging station provided by the embodiment of the present disclosure comprises a first charging unit 11, a second charging unit 12, a charging terminal 13, and a charging host 14. The first charging unit 11 comprises at least one first charging module 111. The second charging unit 12 comprises at least two second charging modules 121. The output end of each first charging module 111 is electrically connected with the input end of all second charging modules 121 respectively. The second charging modules 121 in the second charging unit 12 are alternately electrically connected to form a ring-shaped charging circuit. The input end of the first charging module 111 and the input end of the second charging module 121 are electrically connected with the charging host 14 respectively. The charging terminal 13 is electrically connected with the output end of the second charging module 121. Compared with the related art, the output end of at least one first charging module 111 in the first charging unit 11 is electrically connected with the input end of all second charging modules 121, so that the matrix distribution of power is realized. The first charging module 111 can uniformly or on-demand distribute power to any second charging module 121 according to the need, so that the shared use is realized to reduce the number of contactors. In this way, not only the charging demand of multiple charging terminals 13 can be met, but also the dynamic adjustment can be made according to the real-time charging state of each charging terminal 13, so that the power utilization efficiency and the charging efficiency are improved. In the ring-shaped charging circuit, power can be distributed among the second charging modules 121, and the first charging module 111 can supply power to the second charging module 121, so that the situation that some charging terminals 13 are in power surplus or deficiency can be avoided. Through the combination of the matrix power distribution and the ring-shaped power distribution, the efficient, flexible, and balanced distribution of power is realized, so that the charging efficiency and the energy utilization efficiency are improved.

[0031] Figure 2 Another power distribution architecture of the charging station provided by the embodiment of the present disclosure is shown in a structural schematic diagram as Figure 2

[0032] The output end of one second charging module 121 is electrically connected with the input end of another second charging module 121 in the second charging unit 12, so as to form a forward power transmission path. The input end of one second charging module 121 is electrically connected with the output end of another second charging module 121 in the second charging unit 12, so as to form a reverse power transmission path. The forward power transmission path and the reverse power transmission path are built between at least two second charging modules 121, so as to form the ring-shaped charging circuit.

[0033] Specifically in the embodiment of the present disclosure, as Figure 2 ​As shown, the second charging modules 121 in the second charging unit 12 form a connection path (bidirectional arrow shown in the figure) through the forward and reverse power transmission paths connected to each other. Based on the connection path, the second charging modules 121 are alternately electrically connected to form a ring charging circuit. In the ring charging circuit, power can flow between each second charging module, achieving energy distribution and avoiding the situation of power surplus or deficiency in some modules. However, when multiple vehicles are charging at the same time, the ring charging circuit cannot solve the power blockage generated, which will limit the maximum power output of the charging system, resulting in slower charging speed and lower charging efficiency. Due to the existence of power blockage, part of the power may not be effectively utilized, resulting in energy waste. Especially when multiple charging terminals work at the same time, if a terminal is limited by power, the charging efficiency of the entire system will be affected.

[0034] Further, in one possible implementation of the embodiment, please continue to refer to Figure 2 The output end of each first charging module 111 is electrically connected to the input end of all second charging modules 121.

[0035] In the embodiment of the present disclosure, the first charging unit 11 adopts a matrix power distribution mode, and the output ends of the four first charging modules 111 are electrically connected to the input ends of the eight second charging modules 121 in the second charging unit 12. This design makes the power distribution more flexible and efficient. The first charging module 111 can evenly or on-demand distribute power to each second charging module 121 according to the needs, realizing matrix power distribution. As the core of matrix power distribution, the first charging module 111 can dynamically adjust the amount of power distributed to each second charging module 121 according to the charging demand and system state. This flexible power distribution architecture enables the charging station to better cope with charging demands in different scenarios, improving the efficiency and quality of charging services.

[0036] The first charging module 111 can also serve as a backup and enhancement, providing additional power support when a second charging module 121 fails or is insufficient. This redundant design reduces the risk of single-point failure of the system and improves the reliability and stability of the entire charging system. Through centralized management and scheduling of the first charging unit 11 by the charging host 14, the power in the charging system can be reasonably utilized and optimally distributed. This helps to reduce energy waste and improve energy utilization efficiency.

[0037] Further, in one possible implementation of the embodiment, please continue to refer to Figure 2The connection circuit between the first charging module 111 and the second charging module 121 is provided with a DC contactor 15; and the connection circuit between the second charging modules 121 in the ring charging circuit is also provided with the DC contactor 15.

[0038] In the power distribution architecture of the charging station, the DC contactor 15 is arranged between the first charging module 111 and the second charging module 121, and between the connection circuit of the second charging modules 121 in the ring charging circuit, which can enhance the safety and reliability of the system; facilitate dynamic adjustment of the modules; the fast response characteristics of the DC contactor 15 make the connection and disconnection between the charging modules flexible, and when the charging demand changes, the power distribution of each module can be quickly adjusted by controlling the opening and closing state of the DC contactor 15 to meet different charging demands; when a module needs to be repaired or maintained, it can be disconnected from the system without affecting the normal work of other modules. This reduces maintenance costs and improves the overall operating efficiency of the system.

[0039] As the charging demand grows and technology advances, the charging station may need to add or upgrade charging modules. The arrangement of the DC contactor makes it easier to expand and upgrade the modules. Figure 2 The charging terminal 13 shown in the figure includes one HPC group and three DC groups. By increasing or decreasing the number of DC contactors, the conversion between the HPC group and the DC group can be easily realized to adapt to different scales of charging stations and different charging demands.

[0040] The second charging modules 121 are connected through the ring charging circuit, and there is no need to arrange DC contactors between each module. The first charging module 111, as the core of power distribution, only needs to be connected with one or more second charging modules 121 in the ring charging circuit to realize the input and distribution of power through the DC contactor. In this way, the circuit structure is simplified, the number of DC contactors is reduced, and the complexity and cost of the system are reduced. At the same time, since the use of contactors is reduced, the risk of system failure caused by contactor failure is also reduced, and the reliability and stability of the system are improved.

[0041] Further, in one possible implementation of the embodiment, please continue to refer to Figure 2 The charging terminal 13 includes one first charging gun 131 or two second charging guns 132;

[0042] The first charging gun 131 is electrically connected with two second charging modules 121, and the second charging gun 132 is electrically connected with one second charging module 121. No forward and reverse power transmission paths are constructed between the two second charging modules 121 connected by the first charging gun 131.

[0043] Specifically in the embodiments of the present disclosure, the charging terminal 13 in the form of HPC group includes one first charging gun 131; the charging terminal 13 in the form of DC group includes two second charging guns 132. Please refer to Figure 3 In the embodiments, the connection mode of the charging modules in each charging terminal is understood. The first charging gun 131 establishes electrical connection with two second charging modules 121 respectively, and the second charging gun 132 establishes electrical connection with one second charging module 121. In particular, no path for transmitting electrical energy between the two second charging modules 121 connected by the first charging gun 131 is constructed, that is, no forward electrical energy transmission path and reverse electrical energy transmission path exist between them. Figure 2 In the embodiments, the dashed line represents that the second charging modules 121 of the charging terminal 13 in the form of HPC group do not need to be connected, but in order to realize modular management, when the charging field is constructed, the second charging modules 121 are provided with connection lines, which facilitates the conversion from the charging terminal 13 in the form of DC group to the charging terminal 13 in the form of HPC group. The two second charging modules 121 are independent in electrical energy transmission, and they do not exchange or share electrical energy directly through the electrical energy transmission path. Based on specific charging requirements or safety considerations, this ensures that each charging module can independently provide electrical energy for its corresponding charging gun, while avoiding possible electrical energy interference or safety problems.

[0044] Further, in a possible implementation manner of the embodiments, please refer to Figure 2 The first charging module includes one charging sub-module, and the second charging module includes two charging sub-modules.

[0045] Specifically in the embodiments of the present disclosure, the connection mode of the charging modules of the charging field station with the architecture of 1*HPC+6*DC is provided, as shown in Figure 3 M1-M8 are second charging modules 121, and M9-M12 are first charging modules 111. Each first charging gun 131 is connected with two second charging modules 121, and each second charging gun 132 is connected with one second charging module 121. Figure 3 In the embodiments, the switches of the charging modules can be understood as direct current contactors.

[0046] When charging, controlling different first charging modules 111 and / or second charging modules 121 to charge can dynamically adjust the number of first charging modules 111 allocated to each second charging module 121 according to charging demand and system state. This flexible power distribution architecture enables the charging station to better cope with charging demand in different scenarios, improving the efficiency and quality of charging services. Table 1 is the possible power output of the charging station when charging different number of vehicles. Each charging sub-module is 30kw, so the output power of the first charging module is 30kw, and the output power of the second charging module is 60kw. Take "one car super charging" as an example, the charging terminal 13 connected by the vehicle is an HPC super charging pile, which uses the first charging gun 131 to charge. The output power of the first charging gun 131 connected to two second charging modules 121 is 120kw, so the minimum power that the first charging gun 131 can output is 120kw. Since a single vehicle is charging, the charging station can allocate all charging modules to the first charging gun 131, so the output power of the first charging gun 131 is 600kw.

[0047] Table 1. Power value table of different number of charging vehicles

[0048]

[0049]

[0050] In summary, the embodiments of the present disclosure have the following beneficial effects:

[0051] 1. The architecture can flexibly allocate power to each second charging module through the matrix power distribution of the first charging module, meeting the real-time charging demand of different charging terminals. At the same time, the design of the ring-shaped charging circuit between the second charging modules enables power to flow between modules, achieving balanced distribution and recycling of energy and improving power utilization efficiency.

[0052] 2. By connecting the first charging module to the second charging module in the ring-shaped charging circuit, the architecture enhances the reliability of the system. The first charging module as a backup and enhancement can provide additional power support when a second charging module fails or is insufficient, reducing the risk of single-point failure of the system. In addition, the use of DC contactors also enhances the safety of the system, which can quickly disconnect abnormal or maintenance-required charging modules, protecting the safety of equipment and personnel.

[0053] 3. The architecture can reduce the construction cost of the charging station by optimizing power distribution and reducing the number of DC contactors, and also reduces energy waste and improves energy utilization efficiency. The centralized management and scheduling of the first charging module enable power to be reasonably utilized and optimally distributed, reducing unnecessary loss.

[0054] 4. The architecture adopts a modular design, which can increase or decrease the number of the first charging module and the second charging module according to actual needs, so as to adapt to charging stations of different sizes and charging needs.

[0055] Figure 4 A charging system provided by this disclosure includes: the power distribution architecture of the charging station described in the foregoing embodiments; and a communication control unit 21;

[0056] The input terminal of the communication control unit 21 is connected to the charging host 14, and the output terminal is connected to the DC contactor, for controlling the connection between the first charging module 111 and / or the second charging module 121 and the charging terminal.

[0057] Specifically, in this embodiment, the communication control unit 21 serves as the core control component in the entire charging power distribution architecture, with its input terminal closely connected to the charging host 14. The output terminal of the communication control unit 21 is connected to a DC contactor, and by controlling the opening and closing state of the DC contactor, precise control is achieved over the connection between the first charging module 111, the second charging module 121, and the charging terminal 13.

[0058] In practical operation, the charging host 14 issues corresponding control commands based on the real-time charging demand of the charging station, the power status of each charging module, and the connection status of the charging terminals. Upon receiving these commands, the communication control unit 21 quickly parses and responds, adjusting the connection status between the first charging module 111, the second charging module 121, and the charging terminal 13 by controlling the opening and closing of the DC contactor 15. This enables dynamic allocation and optimized utilization of charging power, ensuring that each charging terminal receives the required charging power while guaranteeing the stable and safe operation of the entire charging station.

[0059] The connection between the communication control unit 21 and the charging host 14 should have high efficient data exchange capability, and a high-speed serial communication interface (such as CAN, RS-485, Ethernet, etc.) can be used to ensure the real-time and accuracy of the command transmission. They follow a specific communication protocol (such as a customized charging control protocol or an industry standard protocol) to standardize the data packet format, command encoding, error detection and correction mechanism, etc., to ensure the correct reception and analysis of the command. The present disclosure does not limit the use of any communication protocol for communication. The communication control unit has an instruction analysis algorithm module built-in, which can identify and decode the control instructions sent by the charging host. These instructions can include charging requirement information (such as charging current, voltage set value), module state query request, connection on-off command, etc. The parsed instructions are converted into internal control signals to trigger corresponding actions. The communication control unit 21 is connected with the DC contactor 15 through digital output interface (such as GPIOs) or dedicated relay driving circuit, which can accurately control the attraction and release of the contactor. When it is necessary to adjust the connection between the charging module and the terminal, the control unit will send appropriate control signals to the contactor to make it perform opening and closing operation. This control can include zero-crossing detection to reduce arc interference, and contactor state feedback to ensure the reliability of command execution.

[0060] Further, in a possible implementation manner of the embodiment, please refer to Figure 4 , the charging system further comprises a power detection unit 22;

[0061] The power detection unit 22 is connected with the first charging unit 11, the second charging unit 12, the charging terminal 13 and the charging host 14 respectively, for detecting the output power of the first charging module 111 and / or the second charging module 121, and the output power of the charging terminal 13.

[0062] Specifically, in the embodiments of the present disclosure, the power detection unit 22 is an independent detection module that is connected to the first charging unit 11, the second charging unit 12, the charging terminal 13, and the charging host 14. In this way, the power detection unit 22 can obtain the output power data of the first charging module 111 and / or the second charging module 121 and the output power data of the charging terminal 13 in real time and accurately. Specifically, the power detection unit 22 measures and monitors the power output of the charging module and the charging terminal in real time through detection algorithms and hardware devices. It can not only detect the power output of each module, but also monitor the output power of the charging terminal in real time, thereby ensuring that the power distribution of the entire charging process is reasonable and efficient. The power detection unit 22 also transmits the detected power data to the charging host 14 in real time. Based on these data, the charging host can more accurately control and manage the entire charging process, ensuring that each charging terminal can obtain stable charging power, and also avoiding damage or safety problems caused by power overload of the charging module.

[0063] The power detection unit 22 is usually equipped with high-precision current transformers (CT) and voltage transformers (PT) to directly measure the output current and voltage of the first charging module 111 and the second charging module 121. These sensors convert the current and voltage signals into small signals that are easy to process, and through steps such as isolation amplification and analog-to-digital conversion (ADC), the analog quantity is converted into digital quantity for subsequent processing. The power detection unit 22 is internally provided with a data acquisition system for regularly or continuously acquiring current and voltage signals, and performs real-time calculation through a built-in microprocessor or digital signal processor (DSP). The power detection unit 22 can also use detection algorithms (such as fast Fourier transform and sliding window average) to filter and smooth the original data, to eliminate noise and improve measurement accuracy.

[0064] When power abnormalities (such as overload, underload, excessive fluctuation, etc.) are detected, the power detection unit can immediately generate an alarm signal and send it to the charging host through the communication interface. In addition, it may also have certain fault diagnosis capabilities, such as identifying sensor faults and calculation errors, and reporting the diagnosis information to help the system quickly locate the problem.

[0065] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0066] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features.

[0067] In the utility model, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship between two elements, unless otherwise expressly limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0068] In the utility model, unless otherwise expressly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0069] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the skilled person in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0070] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A power distribution architecture for a charging station, characterized by, The application relates to a charging system. The charging system comprises a first charging unit, a second charging unit, a charging terminal and a charging host. The first charging unit comprises at least one first charging module, and the second charging unit comprises at least two second charging modules; the output end of each first charging module is electrically connected with the input end of all second charging modules; the second charging modules in the second charging unit are alternately electrically connected to form a ring-shaped charging circuit. The input end of the first charging module and the input end of the second charging module are electrically connected with the charging host; the output end of the second charging module is electrically connected with the charging terminal.

2. The power distribution architecture of a charging station of claim 1, wherein, The output end of one second charging module is electrically connected with the input end of another second charging module in the second charging unit to form a forward power transmission path.

3. The power distribution architecture of a charging station of claim 2, wherein, The input end of one second charging module is electrically connected with the output end of another second charging module in the second charging unit to form a reverse power transmission path.

4. The power distribution architecture of a charging station of claim 3, wherein, The forward power transmission path and the reverse power transmission path are formed between at least two second charging modules to form the ring-shaped charging circuit.

5. The power distribution architecture of a charging station of claim 1, wherein, The connection circuit between the first charging module and the second charging module is provided with a direct-current contactor; the connection circuit between the second charging modules in the ring-shaped charging circuit is provided with the direct-current contactor.

6. The power distribution architecture of a charging station of claim 1, wherein, The charging terminal comprises one first charging gun or two second charging guns. The first charging gun is electrically connected with two second charging modules, and the second charging gun is electrically connected with one second charging module.

7. The power distribution architecture of a charging station of claim 6, wherein, The forward power transmission path and the reverse power transmission path are not formed between the two second charging modules connected with the first charging gun.

8. The power distribution architecture of a charging station of claim 1, wherein, The first charging module comprises one charging sub-module, and the second charging module comprises two charging sub-modules.

9. A charging system, characterized by The charging system comprises a power distribution architecture of a charging station as claimed in any one of claims 1-7 and a communication control unit. The input end of the communication control unit is connected with the charging host, and the output end is connected with a direct-current contactor, which is used for controlling the connection on-off of the first charging module and / or the second charging module and the charging terminal.

10. The charging system of claim 9, wherein, The charging system further comprises a power detection unit. The power detection unit is connected with the first charging unit, the second charging unit, the charging terminal and the charging host respectively, and is used for detecting the output power of the first charging module and / or the second charging module and the output power of the charging terminal.

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