Power distribution device and charging system

Abstract

The utility model relates to a power distribution device and a charging system, the device comprises a power supply module, a distribution module and a charging module, the distribution module is respectively connected with the power supply module and the charging module, the power supply module comprises a plurality of power supply units, and the charging module comprises a plurality of charging terminals. And the distribution module is used for determining a target power supply unit for providing a power supply in the power supply module according to the required power of a target charging terminal needing to be charged, and conducting a connection path between the target charging terminal and a target power supply so as to charge the target charging terminal through the target power supply. According to the device, the flexibility and expansibility of the system are improved, reliable power supply can be provided in various use scenes, and the proper power supply unit can be dynamically selected to supply power according to the required power of the target charging terminal, so that the resources of the power supply module are utilized to the maximum extent, the power waste is reduced, and the charging efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging piles, in particular to a power distribution device and a charging system. Background Art

[0002] With the development of electric vehicle technology, DC fast charging technology has emerged. This technology has the characteristics of fast charging speed and high charging efficiency, which can significantly shorten the charging time of electric vehicles and improve the user experience.

[0003] Traditionally, electric vehicle charging stations typically utilize a fixed power configuration, with each charging terminal independently connected to a power module, making it difficult to flexibly distribute and adjust power. While existing technology works well for a single vehicle, it can be prone to uneven power distribution and idle charging terminals when multiple vehicles are charging simultaneously, resulting in low overall charging efficiency at the station. Utility Model Content

[0004] Based on this, it is necessary to provide a power distribution device and a charging system to address the above-mentioned problem of low charging efficiency.

[0005] In a first aspect, the present application provides a power distribution device, comprising: a power supply module, a distribution module, and a charging module, wherein the distribution module is connected to the power supply module and the charging module respectively, the power supply module includes a plurality of power supply units, and the charging module includes a plurality of charging terminals; wherein,

[0006] The allocation module is used to determine a target power supply unit for providing power in the power supply module based on the required power of the target charging terminal to be charged, and to connect the target charging terminal to the target power supply so as to charge the target charging terminal through the target power supply; the target power supply includes at least one power supply unit.

[0007] In one embodiment, the distribution module includes the same number of distribution units as the power supply units; the distribution unit includes a first connector for directly connecting the power supply unit and the charging terminal; and a plurality of second connectors for indirectly connecting the power supply unit and the charging terminal.

[0008] In one embodiment, the first connector and the second connector both include a power source identifier and a terminal identifier, the power source identifier is used to connect to the power source unit corresponding to the power source identifier during a charging operation, and the terminal identifier is used to connect to the charging terminal corresponding to the terminal identifier during a charging operation.

[0009] In one embodiment, the charging terminal includes a first terminal and a second terminal according to different rated powers, and the charging module is configured to determine whether to connect to the first terminal or the second terminal according to the required power.

[0010] In one embodiment, the charging module groups the charging terminals according to the terminal identifiers; when the charging terminals are all first terminals, the charging module sequentially connects each charging terminal to the allocation unit according to the group identifiers.

[0011] In one embodiment, when the charging module includes a second terminal, the second terminal is used to connect to multiple distribution units at the same time.

[0012] In one embodiment, for each distribution unit, the first connecting member and each of the second connecting members are connected via a copper busbar.

[0013] In one embodiment, the distribution module further includes an interlocking structure, and the interlocking structure is used to prevent abnormal connection of the second connecting member.

[0014] In one embodiment, the power ratings of the power supply units are the same.

[0015] In a second aspect, the present application also provides a charging system, comprising the power distribution device in the above-mentioned first aspect.

[0016] In the above-mentioned power distribution device, several power supply units in the power module can be combined in parallel or in series to meet the power requirements of different charging terminals. This modular design improves the flexibility and scalability of the charging system, ensuring that reliable power supply can be provided in a variety of usage scenarios. The distribution module can dynamically select the appropriate power supply unit for power supply according to the required power of the target charging terminal, and can maximize the use of the resources of the power module, reduce power waste, and improve charging efficiency. The charging module includes several charging terminals, each of which can work independently and be connected to the vehicle's charging gun. The multi-charging terminal design of the charging module can charge multiple vehicles at the same time, improving the service capacity and throughput of the charging system. Through the coordinated work of the above-mentioned components, the power distribution device provided in this embodiment can achieve efficient, intelligent and flexible charging services. The charging system including the power distribution device proposed in this application can provide an efficient and safe charging solution for electric vehicles.

[0017] The above-mentioned charging system, since it adopts the power distribution device in the above-mentioned first aspect, has the technical features and functions of the above-mentioned power distribution device, and provides an efficient and safe charging solution for electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the module structure of a power distribution device provided in one embodiment of the present application;

[0019] Figure 2 A connection structure diagram of a power distribution device in a charging mode provided by an embodiment of the present application;

[0020] Figure 3 This is a connection structure diagram of another charging mode of the power distribution device provided by an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of a charging system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0022] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0028] See Figure 1 In the first aspect, an embodiment of the present invention provides a power distribution device, including: a power supply module, a distribution module and a charging module, the distribution module is connected to the power supply module and the charging module respectively, the power supply module includes a plurality of power supply units, and the charging module includes a plurality of charging terminals.

[0029] Among them, the allocation module is used to determine the target power supply unit for providing power in the power supply module according to the required power of the target charging terminal to be charged, and to connect the connection path between the target charging terminal and the target power supply so as to charge the target charging terminal through the target power supply; the target power supply includes at least one power supply unit.

[0030] In this embodiment, the charging terminal can be a charging gun for connecting to a vehicle. The power module is used to provide a sufficient and stable power supply. Several power units in the power module can be combined in series to meet the power requirements of different charging terminals. This modular design improves the flexibility and scalability of the charging system, ensuring reliable power supply in a variety of usage scenarios.

[0031] The distribution module can be a power switching matrix, enabling intelligent power distribution. For example, the distribution module can dynamically select the appropriate power supply unit based on the power requirements of the target charging terminal. This distribution mechanism maximizes the use of power module resources, reduces power waste, and improves charging efficiency. Furthermore, the distribution module enables parallel charging of multiple charging terminals, further improving system efficiency and user experience.

[0032] The charging module provides a charging interface that connects to terminal devices for charging. The module includes several charging terminals, each of which can be independently connected to a vehicle. The module's multi-terminal design enables simultaneous charging of multiple vehicles, improving the system's service capabilities and throughput. Furthermore, the module can be configured with different charging types based on different charging standards and interface requirements, enhancing system compatibility and adaptability.

[0033] Through the coordinated operation of these components, the power distribution device provided in this embodiment enables efficient, intelligent, and flexible charging services. The power module provides a sufficient power foundation, the distribution module ensures optimal utilization of power resources, and the charging module provides a user-friendly charging interface. The overall system can adapt to different charging needs and scenarios and has broad application prospects.

[0034] In one embodiment, the distribution module includes the same number of distribution units as the power supply units; the distribution units include a first connector for directly connecting the power supply units and the charging terminal; and multiple second connectors for indirectly connecting the power supply units and the charging terminal.

[0035] Reference Figure 1 In this embodiment, the distribution unit is an SCU (Switch Control Unit). Several SCUs, along with copper busbars connecting charging terminals and power units, form a power switching matrix. The first connector is a shorting contact on the switch control unit, and the second connector is a relay. The shorting contact connects the power module to the corresponding pre-assigned charging plug, while the relay switches the power module to another charging plug as needed.

[0036] The first connector, the shorting contact, provides a direct connection between the power supply unit and the pre-assigned charging gun. This direct connection reduces losses in power transmission and improves charging efficiency. The second connector, the relay, indirectly connects the power supply unit to the charging terminal. The relay can dynamically switch the power supply unit to different charging guns as needed, providing a flexible power distribution solution. This design not only improves system utilization but also enables customized power supply based on the needs of different charging terminals.

[0037] The distribution module contains the same number of distribution units as power supply units, each of which independently manages the power distribution of a power supply unit. This design ensures that each power supply unit is effectively utilized and can be dynamically allocated according to demand, improving system flexibility and responsiveness.

[0038] The SCU (Switch Control Unit) serves as the core distribution unit, enabling fast switching between the power supply unit and the charging terminal. Through the switch control unit, the power supply unit can be directly or indirectly connected to the charging terminal, achieving efficient power distribution.

[0039] In one embodiment, the first connector and the second connector both include a power source identifier and a terminal identifier. The power source identifier is used to connect to the power source unit corresponding to the power source identifier during charging operation, and the terminal identifier is used to connect to the charging terminal corresponding to the terminal identifier during charging operation.

[0040] The power source identifier uniquely identifies a power source unit, such as its serial number or name. The power source identifier is used to identify the power source unit corresponding to the power source identifier in the power module, and the power source unit is connected to that power source unit during charging. For example, the power distribution device can use the power source identifier to determine which power source unit to connect to the target charging terminal to provide the required power support, based on the charging requirements of the target charging terminal and the idle state of the power source module.

[0041] The terminal identifier is used to connect to the charging terminal corresponding to the terminal identifier during charging operations. The charging system uses the specific identifier of the charging terminal, such as the charging gun serial number or other unique identifier, to determine which power supply unit is connected to the charging terminal through the power supply identifier to enable charging operations.

[0042] In one embodiment, the charging terminal includes a first terminal and a second terminal according to different rated powers, and the charging module is configured to determine whether to connect to the first terminal or the second terminal according to required power.

[0043] In this embodiment, the first terminal can be a standard fast-charging gun, and the second terminal can be a supercharging gun. Classifying charging terminals into a first terminal (standard fast-charging gun) and a second terminal (supercharging gun) based on their rated power can better meet the charging needs of different types of vehicles. For example, standard fast-charging guns are suitable for vehicles with lower power requirements, while supercharging guns are suitable for vehicles with high power requirements that require rapid charging. This classification improves the adaptability and flexibility of the charging system. The charging module determines whether to connect to a standard fast-charging gun or a supercharging gun based on the power requirements of the target charging terminal. In this way, the system can dynamically select the appropriate charging terminal based on actual needs, improving charging efficiency and resource utilization, and ensuring that each charging operation achieves the optimal charging result. Rationally allocating the use of standard fast-charging guns and supercharging guns avoids resource waste and improves overall charging efficiency.

[0044] In one embodiment, the charging module groups the charging terminals according to the terminal identifiers; when all the charging terminals are first terminals, the charging module sequentially connects each charging terminal to the allocation unit according to the group identifiers.

[0045] A terminal identifier uniquely identifies a charging terminal, or charging gun, such as its serial number or name. The terminal identifier is used to identify the corresponding charging terminal in the charging module. Specifically, in this embodiment, charging terminals are grouped by terminal identifier, enabling the charging module to more efficiently manage and schedule charging resources. Grouping helps optimize power distribution, reduce resource waste, and provide greater organization and systematization during charging operations.

[0046] The following combination Figures 1 to 3 As shown, the fast charging scenario using the first terminal is used as an example. When fast charging gun No. 1 is plugged in and starts charging, if the pre-allocated power module of the gun is used in other cars, the PCU (power control board) will switch it back to the gun. The selection of switching relays is based on the distance from small to large, starting from the relay closest to the gun, giving priority to the relay with the corresponding identification of the gun, and then selecting the relay closest to the gun. This switching logic minimizes the frequent switching of the relay switching matrix, ensuring the continuity and stability of the charging process. By giving priority to the relays of this pile and the relays closest to this pile, the system can respond quickly and optimize the power transmission path, thereby improving charging efficiency and reliability.

[0047] During the pre-charge phase, the voltage is boosted simultaneously according to standard requirements. During the charging phase, the voltage and current of the power supply unit to be switched are adjusted based on the voltage and current requirements transmitted in the BCL (Battery Charging Level) message. This simultaneous voltage boost during the pre-charge phase ensures that the system reaches the required voltage level before actual charging, ensuring a smooth charging process. During the charging phase, the voltage and current are dynamically adjusted based on actual demand, providing precise power supply, optimizing charging results, and improving efficiency.

[0048] During the charging process, if the power modules corresponding to the preset guns are not in use, these modules will not be allocated again until charging is completed, at which point they will be released collectively. The module locking mechanism ensures that frequent power module switching occurs during the charging process, avoiding power fluctuations and system instability caused by frequent switching. This unified release mechanism improves system management efficiency and enables rapid recovery and preparation for the next charging task after charging is completed.

[0049] During the charging process, when the current demand changes, the current is calculated based on the number of modules in the switching group and adjusted accordingly. This dynamic adjustment mechanism ensures that the system can respond promptly and provide appropriate power supply when the current demand changes, avoiding current shortages or overloads during charging, and ensuring a safe and stable charging process.

[0050] See Figure 3 In one embodiment, when the charging module includes a second terminal, the second terminal is used to connect to multiple distribution units at the same time.

[0051] If the charging module includes a second terminal, or supercharger, it can be connected to multiple distribution units simultaneously. For example, if modules 1-11 need to be switched to supercharger 0, the PCU instructs relays 1.0-11.0 on SCU boards 1-11 to close, disconnecting all other relays. Meanwhile, the remaining superchargers are inactive, allowing the output current of all power modules to be switched to supercharger 0.

[0052] This design enables the system to flexibly dispatch multiple power modules, providing high power output by connecting multiple distribution units simultaneously. This can meet the needs of high-power fast charging, providing a maximum power output of 480KW, and improving charging efficiency and speed.

[0053] In one embodiment, for each distribution unit, the first connector and each second connector are connected by a copper busbar. The copper busbar has low resistance and excellent electrical conductivity, and can efficiently transmit large currents, reduce power loss, and improve power transmission efficiency. The copper busbar connection provides more reliable mechanical strength and electrical connection, ensuring the stability of the system under high power output conditions. The high conductivity of the copper busbar ensures that high-power current can be stably transmitted during the transmission process, avoiding power loss and heat problems caused by excessive resistance. In addition, the copper busbar has good heat dissipation performance and can effectively dissipate the heat generated during the transmission process, avoiding overheating problems. Good heat dissipation performance not only extends the service life of the system, but also improves the safety of the system and prevents electrical failures caused by overheating.

[0054] In one embodiment, the distribution module also includes an interlocking mechanism to prevent abnormal connection of the second connector. This mechanism prevents abnormalities in the second connector (relay) during connection, such as relay sticking or malfunctioning. This mechanism ensures normal system operation when switching mode is enabled, preventing power distribution errors or safety issues caused by relay failure.

[0055] After each SCU board is in switching mode, it must ensure that the relays are free of sticking or refusing to operate. This step ensures relay reliability and stability, preventing relays from remaining closed or refusing to close due to mechanical or electrical failures. This detection and prevention mechanism improves system reliability and safety. Furthermore, only one relay can be closed during operation on each SCU board. This restriction ensures a unique connection between the power supply unit and the charging terminal, avoiding power distribution conflicts and safety hazards caused by multiple connections. This mechanism improves system operational safety and ensures accurate and stable power transmission.

[0056] In one of the embodiments, the rated power of each power supply unit is the same. Specifically, this embodiment has 12 power supply units, and the rated power of each power supply unit is 40KW. The maximum current that can pass through each SCU board is 125A, and the maximum current of each relay is 125A; all copper bars are divided into supercharging copper bars and fast charging copper bars, the maximum current of fast charging copper bars is 350A, and the maximum current of supercharging copper bars is 750A. These parameter designs ensure the safety and efficiency of the system during power distribution and charging. The uniform rated power of the power supply unit and the current carrying capacity of the SCU board and relay play an important role in the design and operation of the charging system. At the same time, the distinction and rated current capacity of the fast charging copper bar and the supercharging copper bar help to meet the power transmission requirements under different charging needs.

[0057] See Figure 4In one embodiment, the present invention further provides a charging system comprising the power distribution device of the first aspect. This charging system inherits the technical features and functions of the aforementioned power distribution device, providing an efficient and safe charging solution for electric vehicles.

[0058] In this embodiment, the charging system is a national standard 480kW DC split charging station, consisting of a main power cabinet and charging terminals. The unit responsible for controlling the switching distribution matrix and power output is located in the main power cabinet. This cabinet contains the PCU (power control unit), TCU (main control unit), SCU (switch control unit), and power modules.

[0059] The PCU receives charging demand information from the charging control unit (CCU) in the charging terminal and calculates a power allocation plan based on the switching status of the charging module and the SCU. The SCU receives the power allocation plan issued by the PCU and executes switching. The power module executes the power output plan according to PCU instructions. The TCU in the main power cabinet primarily obtains the operating status of each hardware unit from the PCU and uploads it to the platform. The PCU, SCU, and power module can also be upgraded through the TCU. The TCU can be replaced with an ESP32 gateway to reduce costs.

[0060] In one embodiment, the charging system, when in operation, comprises the following steps:

[0061] After the vehicle to be charged is connected to the target charging terminal, the required power of the target charging terminal to be charged is determined based on the charging interaction message between the target charging terminal and the vehicle to be charged;

[0062] Determining a target power supply unit for providing power in the power supply module according to the required power;

[0063] A connection path between the target charging terminal and the target power supply unit is opened to charge the target charging terminal.

[0064] Specifically, in this embodiment, there are a total of 12 40KW power modules, which are switched to any charging terminal, i.e., charging gun, through each SCU board, i.e., a distribution unit.

[0065] After a vehicle is connected to a target charging terminal, the target charging terminal's required power is determined based on the charging messages exchanged between the target charging terminal and the vehicle. This step accurately determines the target charging terminal's required power by analyzing the charging messages. This ensures that each charging terminal receives the power it needs, preventing overcharging or undercharging and improving charging efficiency and safety.

[0066] Based on the power requirements of the target charging terminal, the power module determines the target power unit to provide power. This step intelligently selects the appropriate power unit based on the required power, optimizing power resource utilization. The twelve 40kW power modules can be flexibly combined to meet the needs of different charging terminals, improving the system's adaptability and flexibility.

[0067] The target charging terminal is connected to the target power unit to charge the target charging terminal. During this step, the power module can be dynamically switched to any charging terminal through the SCU (distribution unit). This process ensures efficient power transmission, reduces conversion losses, and improves overall charging efficiency through precise control.

[0068] In one embodiment, determining the required power of the target charging terminal to be charged based on the charging message interaction between the target charging terminal and the vehicle to be charged includes:

[0069] Obtain the maximum current and maximum voltage in the charging interaction message, and calculate the maximum required power of the target charging terminal based on the maximum current and maximum voltage.

[0070] By obtaining the maximum current and maximum voltage from the charging message, the system can accurately calculate the maximum power required by the target charging terminal. This precise calculation ensures that the system allocates sufficient power to each charging terminal, avoiding power shortages or oversupply, and improving charging efficiency. The charging system can dynamically adjust to the varying demands of each charge. This means that regardless of the specific requirements of the electric vehicle, the system can respond in real time and provide appropriate power support. This dynamic adaptability enables the system to provide optimal charging services for electric vehicles of different types and in varying states.

[0071] By predetermining the maximum power demand, the system can avoid safety issues such as overload and overheating. Only when the maximum demand of the charging terminal is clearly understood can the system better allocate resources to ensure that each component operates within a safe range. After determining the maximum power demand, the system can optimize the allocation of power units. This optimization not only improves charging efficiency but also extends the service life of the power units. By properly distributing the load, it avoids the situation where some power units are overused while others are idle.

[0072] In one embodiment, determining a target power supply unit for providing power in a power module according to required power includes:

[0073] According to the required power, the required number of power supply units is determined, and according to the idle status of the current power supply module, the target power supply unit for providing power is determined, and the target power supply unit is set to the pre-charge state.

[0074] Based on the calculated maximum power requirement of the target charging terminal, the system first determines how many power supply units are needed to meet this requirement. Assuming that the rated power of each power supply unit is 40KW, the number of power supply units required is:

[0075] Required number of power supply units = maximum required power / 40KW

[0076] After determining the required number of power supply units, the system checks the availability of the current power modules and selects a sufficient number of available units as target power supply units. This process ensures the system can flexibly respond to varying charging needs without overusing certain power supply units and wasting resources. After selecting the target power supply units, the system places them in a pre-charge state, ready to initiate charging at any time. In this pre-charge state, the power supply units can quickly respond to charging requests, reducing charging wait times.

[0077] In one embodiment, the charging system includes at least one power supply mode, and connects a connection path between a target charging terminal and a target power supply unit to charge the target charging terminal, including:

[0078] Determining a target charging method corresponding to a target charging mode of the charging system according to a preset mapping relationship between charging modes and charging methods;

[0079] According to the target charging method, a target power supply unit for supplying power is determined from all power supply units, and the target power supply unit is controlled to be connected to the corresponding target charging terminal.

[0080] The system first determines the most suitable target charging mode based on the current charging demand and the preset mapping relationship between charging modes and charging methods. Common charging modes include supercharge mode, fast charge mode, and equalization mode.

[0081] Each charging mode corresponds to a specific charging method. For example, supercharging mode may require multiple power supply units to work simultaneously to provide high power output, while fast charging mode selects some power supply units to work based on the number of idle power supply units, and equal charging mode evenly distributes the required power according to the number of charging terminals. Based on the determined target charging method, the system selects the target power supply unit from all power supply units for power supply. For example:

[0082] In supercharge mode, the system may select all available power units.

[0083] In fast charging mode, the system selects some power supply units based on the idle situation.

[0084] In the equalizing charging mode, the system divides the power supply units equally according to the number of charging terminals.

[0085] Once the target power units are determined, the system controls the connection of these power units to the target charging terminals to ensure a smooth charging process. The system needs to ensure the reliability and safety of the connection to avoid overload or failure during the charging process. By flexibly selecting the charging mode and power unit according to charging needs, the system can achieve efficient charging in different scenarios and maximize the use of power resources. The system can automatically adjust the charging mode according to actual conditions, adapt to different charging needs and environments, and provide flexible charging solutions. By determining the charging method through mapping relationships, the system can optimize resource allocation in multiple terminals and multiple scenarios, avoid resource waste, and improve overall efficiency. When controlling the connection of the power unit, the system ensures the reliability of the connection path, avoids overload or other safety hazards during the charging process, and improves the reliability and safety of the system.

[0086] In one embodiment, the power supply mode includes a supercharge mode, a fast charge mode, and an equalization charge mode. According to the target charging method, controlling the target power supply unit to connect to the corresponding target charging terminal includes:

[0087] When the target power supply mode is the supercharging mode, all power supply units of the power module are determined as target units, and the target power supply units are controlled to be connected to the corresponding target charging terminals;

[0088] When the target power supply mode is the fast charging mode, determining that the target power supply unit is an idle power supply unit, and controlling the target power supply unit to be connected to the corresponding target charging terminal;

[0089] When the target power supply mode is the equalizing charging mode, the power of the charging system is evenly distributed according to the number of target charging terminals, and a corresponding number of target power supply units are controlled to be connected to the corresponding target charging terminals according to the equalized power.

[0090] When the target power supply mode is Supercharge mode, all power units in the power module are identified as target units and connected to the corresponding target charging terminals (superchargers). In this mode, all power units are centralized to the superchargers, achieving maximum power output, meeting the needs of high-power vehicles requiring fast charging, with a maximum output of up to 480 kW. When Supercharge mode is activated, all other charging guns, even those currently charging, cease operation, ensuring the highest priority and charging efficiency for the superchargers. By concentrating resources to power the superchargers, the system can complete high-power charging tasks in a short period of time, improving charging efficiency and user experience.

[0091] When the target power supply mode is fast charging mode, the target power unit is determined to be an idle power unit and is controlled to connect to the corresponding target charging terminal. In fast charging mode, the system dynamically allocates resources based on idle power units, improving system flexibility and resource utilization. This mode can quickly respond to the charging needs of different vehicles, providing moderate power output and improving system adaptability. By utilizing idle power units for fast charging, the system can efficiently utilize existing resources, reduce waiting time, and improve charging efficiency.

[0092] When the target power supply mode is equalizing, the charging system's power is evenly distributed according to the number of target charging terminals, and the corresponding number of target power units is controlled to connect to the corresponding target charging terminals based on the equalized power. In equalizing mode, the total power is evenly distributed according to the number of charging terminals, ensuring that each charging terminal receives appropriate power output, improving the balance and fairness of the system. It can dynamically adjust power distribution based on the actual number of charging terminals, adapting to various charging scenarios and providing stable charging services.

[0093] In one embodiment, when the target power supply mode is the fast charging mode, controlling the idle target power supply unit to connect to the corresponding target charging terminal includes:

[0094] When the target charging terminal is connected to the vehicle to be charged, control at least one power supply unit to connect to the target charging terminal. If the power supply unit corresponding to the target charging terminal is occupied by other charging terminals, control the power supply unit corresponding to the target charging terminal to reconnect to the target charging terminal.

[0095] When there is an idle power supply unit, the number of second terminals in the charging system is detected. If a second terminal exists, the idle power supply unit is preferentially connected to the second terminal. If no second terminal exists, the idle power supply unit is preferentially connected to the first terminal with the highest power consumption utilization rate.

[0096] When the power consumption utilization rates of several first terminals are equal, the idle power supply unit is preferentially connected to the first terminal that starts charging first.

[0097] Specifically in this embodiment, the fast charging mode includes the following three operating conditions:

[0098] Each charging station (including supercharging stations) is guaranteed to have at least one available module when a vehicle is charging. If the module associated with a charging station is switched to another station, the module must be switched back to the station when the charging station is plugged in. This ensures that each charging terminal has at least one available module to meet basic charging needs and avoid situations where no power module is available. The system dynamically adjusts power module allocation to ensure that a power module is promptly restored when a charging station is plugged in, improving charging reliability.

[0099] If there are idle power modules in the matrix, supercharging guns are prioritized. If there are no supercharging guns, the guns with the highest power utilization are prioritized. When idle power modules are available, supercharging guns are prioritized to meet high power demands and optimize resource utilization. If there are no supercharging guns, the guns with the highest power utilization are prioritized to ensure efficient resource allocation and meet maximum power demands.

[0100] If utilization rates are equal, the idle module is allocated to the charging gun that started charging first. When power consumption utilization rates are equal, the needs of the charging gun that started charging first are prioritized to ensure fair resource allocation and improve overall system efficiency. Prioritizing the needs of users who start charging first reduces waiting time, improves user satisfaction, and enhances the charging experience.

[0101] It should be noted that in this embodiment, when the charging gun is fully equipped, each power module is pre-assigned to a specific gun. At any time, if a specific gun needs to use it, the power module dedicated to that gun will be immediately switched back to that gun. When multiple power modules are connected to a gun, they must be grouped together, and the newly added power module must be in the same group as the previously connected module.

[0102] A pre-binding and instant switchback mechanism ensures that charging guns can quickly access their dedicated power modules when needed, improving system resource utilization efficiency. A multi-module grouping strategy ensures that multiple power modules work together, improving the stability and efficiency of high-power output and rapidly meeting charging needs. This reduces user wait time, improves the responsiveness and reliability of charging services, and enhances user satisfaction. Through rational group management and module collaboration, the system maintains stable operation even with multiple modules switched on and off, providing consistent and efficient power output.

[0103] In one embodiment, before the connection path between the target charging terminal and the target power supply unit is opened and the target charging terminal is charged, the target power supply unit is in a no-load state.

[0104] Specifically in this embodiment, when the module has not started output, if the charging power of a certain gun requires multiple modules, SCU switching is required. The SCU relay must be switched into place (all relays that do not output are disconnected) before the corresponding module can start to output voltage. When the output voltage is ≥60V, it is strictly forbidden to switch the SCU relay.

[0105] When a module is charging and needs to be switched on and off, the output current of the module needs to be reduced to 0, and then the relay of the module needs to be disconnected. After the switch is in place, the module can restart the output current. As long as the voltages at both ends of the relay are equal, the module does not need to be shut down.

[0106] In addition, in some special cases, when the SCU is powered off, the relays are not switched; after the SCU is powered on again, all relays need to be tested for on / off status. If the relays are on and the module is not in the working output state, the relays should be disconnected.

[0107] In one embodiment, after obtaining the maximum current and maximum voltage in the charging interaction message and calculating and determining the maximum required power of the target charging terminal, the method further includes:

[0108] Record the working status of the power supply unit and distribution unit. If there is any abnormality, isolate the abnormal power supply unit or distribution unit and upload the abnormal information.

[0109] Specifically, anomalies may include power unit anomalies and SCU relay adhesion anomalies. If a power module in the power matrix experiences an anomaly, the system will record the anomaly and report it to the corresponding CCU. The CCU will disable the charging function of the current charging gun and display an anomaly notification to the user. Simultaneously, the system notifies the platform through the main control unit (TCU) for subsequent processing.

[0110] When a relay in an SCU becomes stuck, the system stops using the power supply unit corresponding to the SCU and the charging cable corresponding to the affected relay. The affected charging cable and power module are marked as unusable and an abnormality message is displayed on the terminal. The system also reports the abnormality to the platform for further processing and repair.

[0111] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A power distribution device, characterized in that: include: A power module, a distribution module and a charging module, wherein the distribution module is connected to the power module and the charging module respectively, the power module includes a plurality of power supply units, and the charging module includes a plurality of charging terminals; wherein, The allocation module is used to determine a target power supply unit for providing power in the power supply module based on the required power of the target charging terminal to be charged, and to connect the target charging terminal to the target power supply so as to charge the target charging terminal through the target power supply; the target power supply includes at least one power supply unit.

2. The device according to claim 1, characterized in that The distribution module includes the same number of distribution units as the power supply units; the distribution unit includes a first connector for directly connecting the power supply unit and the charging terminal; and a plurality of second connectors for indirectly connecting the power supply unit and the charging terminal.

3. The device according to claim 2, characterized in that The first connector and the second connector both include a power source identifier and a terminal identifier. The power source identifier is used to connect to the power source unit corresponding to the power source identifier during a charging operation, and the terminal identifier is used to connect to the charging terminal corresponding to the terminal identifier during a charging operation.

4. The device according to claim 3, characterized in that The charging terminal includes a first terminal and a second terminal according to different rated powers, and the charging module is configured to determine whether to connect to the first terminal or the second terminal according to the required power.

5. The device according to claim 4, characterized in that The charging module groups the charging terminals according to the terminal identifiers; when the charging terminals are all first terminals, the charging module sequentially connects each charging terminal to the allocation unit according to the group identifiers.

6. The device according to claim 3, characterized in that In the case where the charging module includes a second terminal, the second terminal is used to connect to multiple distribution units at the same time.

7. The device according to claim 2, characterized in that For each distribution unit, the first connecting member and each of the second connecting members are connected via a copper busbar.

8. The device according to claim 2, characterized in that The distribution module further includes an interlocking structure, which is used to prevent abnormal connection of the second connecting member.

9. The device according to claim 1, characterized in that The rated power of each power supply unit is the same.

10. A charging system, characterized in that: The invention comprises the power distribution device according to any one of claims 1 to 9.

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