Power distribution assembly and power grid system

Abstract

This application discloses a power distribution component and a power grid system. The power distribution component includes a main control box, sub-control boxes, and a first line. The main control box is used for electrical connection to the mains power grid and for electrical connection to loads and / or household distribution boxes. The sub-control boxes are separately installed from the main control box and are used for electrical connection to energy storage devices. The first line electrically connects the sub-control boxes and the main control box, and power is transmitted between the sub-control boxes and the main control box through the first line. The sub-control boxes and the main control box communicate via power line carrier communication through the first line, eliminating the need for additional communication lines. The power distribution component integrates power supply and communication, and the main control box and sub-control boxes can be arranged separately without distance requirements, increasing the installation flexibility of the power distribution component and expanding the application scenarios and scope of use for the power distribution component and energy storage devices.

Description

Technical Field

[0001] This application relates to the field of power grid technology, and in particular to a power distribution component and power grid system. Background Technology

[0002] Currently, energy storage devices and power distribution components are increasingly being used in residential applications within power grid systems. For ease of use and installation safety, power distribution components are typically installed outdoors, while energy storage devices are generally not waterproof and require indoor installation. However, current power distribution components are installed as a single unit, which does not allow for outdoor installations or separate installations of power distribution components and energy storage devices over large distances. Utility Model Content

[0003] This application provides a power distribution component and a power grid system.

[0004] In a first aspect, this application provides a power distribution assembly. The power distribution assembly includes a main control box, a sub-control box, and the first line. The main control box is used for electrical connection to the mains power grid and for electrical connection to loads and / or household distribution boxes. The sub-control box is separately disposed from the main control box and is used for electrical connection to an energy storage device. The first line electrically connects the sub-control box and the main control box, and power transmission between the sub-control box and the main control box occurs via the first line. Communication between the sub-control box and the main control box occurs via the first line using power line carrier communication.

[0005] In some embodiments, the first line includes a ground wire, at least one live wire, and a neutral wire. The sub-control box and the main control box communicate via the neutral wire and any one of the live wires using power line carrier communication. The sub-control box and the main control box transmit power via the ground wire, all the live wires, and the neutral wire.

[0006] In some embodiments, the first line includes a ground wire, at least one live wire, and a neutral wire. The main control box includes a main PLC coupler, a main relay, a first switching power supply, and a main processor. The main PLC coupler includes a primary coil and a secondary coil, and the primary coil of the main PLC coupler is electrically connected to the neutral wire and any one of the live wires. The main relay is electrically connected to the ground wire, the neutral wire, and all the live wires. The first switching power supply is electrically connected to the primary coil of the main PLC coupler. The main processor is electrically connected to the secondary coils of the first switching power supply, the main relay, and the main PLC coupler, respectively.

[0007] In some embodiments, the main relay includes a first switch, a second switch, a first mains input terminal, a second mains input terminal, a first sub-control input terminal, a second sub-control input terminal, a first load output terminal, and a second load output terminal. The first switch is connected between the first mains input terminal and the first load output terminal. The first switch is also connected between the first sub-control input terminal and the first load output terminal. The second switch is connected between the second mains input terminal and the second load output terminal. The second switch is also connected between the second sub-control input terminal and the second load output terminal.

[0008] In some embodiments, the sub-control box includes a power supply, a sub-PLC coupler, a second switching power supply, and a sub-processor. The power supply is electrically connected to the energy storage device. The sub-PLC coupler includes a primary coil and a secondary coil. The secondary coil of the sub-PLC coupler is electrically connected to the primary coil of the main PLC coupler via the neutral wire and any one of the live wires. The second switching power supply is electrically connected to the primary coil of the sub-PLC coupler and the power supply, respectively. The sub-processor is electrically connected to the secondary coil of the sub-PLC coupler and the power supply, respectively, and is also electrically connected to the energy storage device.

[0009] Secondly, this application provides a power grid system, which includes the power distribution components described in any of the above embodiments.

[0010] In some embodiments, the power grid system further includes an energy storage device, a mains power grid, and loads and / or household distribution boxes. The energy storage device is electrically connected to the sub-control box. The mains power grid is electrically connected to the main relay of the main control box. The loads and / or household distribution boxes are electrically connected to the main relay of the main control box.

[0011] In some embodiments, the grounding wire of the first line, the grounding wire of the mains power grid, and the grounding wire of the load and / or the household distribution box are all connected, and the neutral wire of the first line, the neutral wire of the mains power grid, and the neutral wire of the load and / or the household distribution box are all connected.

[0012] In some embodiments, the power grid system further includes a second line, which includes a first wiring harness. The first wiring harness includes a power supply line, a communication line, and a signal line. The power supply line is connected to the power supply, and the signal line and the communication line are both connected to the subprocessor.

[0013] In some embodiments, the second line further includes a second wiring harness, which includes an energy storage grounding wire, at least one energy storage live wire, and an energy storage neutral wire. The energy storage grounding wire, energy storage live wire, and energy storage neutral wire are respectively connected to the grounding wire, live wire, and neutral wire of the first line.

[0014] In some embodiments, the second line further includes a second wiring harness, which includes an energy storage grounding wire, at least one energy storage live wire, and an energy storage neutral wire. The sub-control box also includes a sub-relay, which is electrically connected to the sub-processor. The energy storage live wires of the second wiring harness are all connected to the sub-relay, and the first line is connected to the sub-relay.

[0015] In the power distribution components and power grid system of this application, the main control box and the sub-control box are connected by a first line to realize power transmission and communicate via PLC, eliminating the need for additional communication lines. The power distribution components integrate power supply and communication. The main control box and the sub-control box can be arranged separately without distance requirements, increasing the installation flexibility of the power distribution components. The main control box can be installed in one location as needed, while the sub-control box and energy storage equipment can also be installed in another location as needed. Theoretically, power supply and communication can be achieved over a distance of kilometers, which is longer than that of general industrial communication methods, expanding the application scenarios and scope of use of the power distribution components and energy storage equipment.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of a power grid system according to some embodiments of this application;

[0019] Figure 2 This is a communication schematic diagram of the power distribution components of a power grid system according to some embodiments of this application;

[0020] Figure 3 This is a communication schematic diagram of a power distribution component according to other embodiments of this application;

[0021] Figure 4 This is a communication schematic diagram of a power grid system according to other embodiments of this application;

[0022] Figure 5 This is a communication schematic diagram of a power distribution component according to some embodiments of this application;

[0023] Figure 6This is a schematic diagram of a power grid system according to some other embodiments of this application;

[0024] Figure 7 This is a communication schematic diagram of a partial structure of a power grid system according to some embodiments of this application;

[0025] Figure 8 This application also provides a communication schematic diagram of a power grid system according to some other embodiments;

[0026] Figure 9 This is a communication diagram of a power grid system according to some embodiments of this application.

[0027] Explanation of key component designations:

[0028] Power grid system 1000; power distribution components 100; energy storage equipment 300; mains power grid 500; load 700;

[0029] Main control box 10; main PLC coupler 11; primary coil 111; secondary coil 113; main relay 13; first switch 131; second switch 132; first mains input terminal 133; second mains input terminal 134; first sub-control input terminal 135; second sub-control input terminal 136; first load output terminal 137; second load output terminal 138; first switching power supply 15; main processor 17; sub-control box 30; sub-PLC coupler 31; primary coil 311; secondary coil 313; power supply 33; second switching power supply 35; sub-processor 37; sub-relay 39; first line 50; second line 70; first wiring harness 71; power supply line 711; communication line 713; signal line 715; second wiring harness 73. Detailed Implementation

[0030] In the description of this application, some of the disclosed content has been illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The following description with reference to the accompanying drawings is exemplary and is only used to explain this application, and should not be construed as limiting this application.

[0031] This application discloses numerous different contents or examples for implementing different structures. To simplify the disclosure of this application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0032] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In the description of this application, it should be understood that the terms used to indicate orientation or positional relationship (such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc.) are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and understanding the corresponding embodiments, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to indicate orientation or positional relationship should not be construed as limitations on this application.

[0034] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] A power grid system is used for the distribution, storage, and use of electrical energy. Currently, energy storage devices and power distribution components are increasingly being used in residential applications. For user convenience and installation safety, power distribution components are typically installed outdoors, but energy storage devices are generally not waterproof and need to be installed indoors. However, current power distribution components are installed as a single unit, which does not allow for outdoor installations or separate installations of power distribution components and energy storage devices over large distances.

[0036] Please see Figure 1 ,or Figure 4 ,or Figure 6 ,or Figure 9The power grid system 1000 includes a power distribution component 100, an energy storage device 300, a mains power grid 500, and a load 700. The energy storage device 300, the mains power grid 500, the load 700, and / or the household distribution box are all electrically connected to the power distribution component 100.

[0037] Specifically, the mains grid 500 serves as one of the power supply sources in the power grid system 1000, providing electrical energy to the load 700. The energy storage device 300, capable of storing and releasing electrical energy, also serves as one of the power supply sources in the power grid system 1000. When charging, the energy storage device 300 can receive and store electrical energy from external sources (such as the mains grid 500 or photovoltaic panels). When discharging, the energy storage device 300 can output electrical energy to the load 700 or other devices in the power grid system 1000. The load 700 is the final user of electrical energy and includes various devices that consume electrical energy, such as industrial production equipment and household appliances. The household distribution box is used to distribute electrical energy to various electrical circuits within the household. The implementation method described below using the load 700 also applies to the household distribution box, and also to situations where both the load 700 and the household distribution box exist simultaneously; further details will not be repeated below.

[0038] Distribution module 100 is used for distributing and regulating electrical energy. Electrical energy flows from the mains grid 500 into distribution module 100, and is then distributed by distribution module 100 to load 700 or energy storage device 300. Electrical energy can also flow from energy storage device 300 into distribution module 100, and then be distributed by distribution module 100 to load 700 or uploaded to mains grid 500. Distribution module 100 can switch between receiving electrical energy from mains grid 500 or energy storage device 300. It is understood that the power grid system 1000 includes at least the beneficial effects of distribution module 100 described below.

[0039] Please see Figure 1 This application provides a power distribution assembly 100. The power distribution assembly 100 includes a main control box 10, a sub-control box 30, and a first line 50. The main control box 10 is used for electrical connection to the mains power grid 500 and for electrical connection to a load 700 and / or a household distribution box. The sub-control box 30 is separately disposed from the main control box 10 and is used for electrical connection to an energy storage device 300. The first line 50 electrically connects the sub-control box 30 and the main control box 10, and power is transmitted between the sub-control box 30 and the main control box 10 via the first line 50. Communication between the sub-control box 30 and the main control box 10 is performed via the first line 50 using power line carrier communication.

[0040] Specifically, the power distribution assembly 100 of this application includes a main control box 10 and a sub-control box 30. The main control box 10 can receive electrical energy transmitted from the mains power grid 500 and transmit it to the load 700 so that the load 700 can operate normally. The electrical energy transmitted from the mains power grid 500 can also be used for the operation of the main control box 10 itself. The electrical energy transmitted from the mains power grid 500 can also be transmitted to the energy storage device 300 to charge the energy storage device 300. The sub-control box 30 is used to communicate with the energy storage device 300 and to perform current combining and communication merging and forwarding functions. When the energy storage device 300 is in the powered-on state, the sub-control box 30 can receive electrical energy (e.g., DC low-voltage electricity) transmitted from the energy storage device 300 and operate. That is, when the energy storage device 300 is operating, the sub-control box 30 can independently control the energy storage device 300.

[0041] The first line 50 is used for power transmission and communication between the sub-control box 30 and the main control box 10.

[0042] Regarding communication, when the mains power grid 500 supplies power to the main control box 10, the main control box 10 can communicate with the sub-control box 30 via the first line 50 using power line carrier (PLC) communication, thereby controlling the sub-control box 30 and indirectly controlling the energy storage device 300 through the sub-control box 30, as well as obtaining information from the sub-control box 30 and the energy storage device 300. When the energy storage device 300 supplies power to the sub-control box 30, the sub-control box 30 can communicate with the main control box 10 via the first line 50 using PLC communication, thereby transmitting information to the main control box 10 and enabling the energy storage device 300 and the sub-control box 30 to be controlled by the main control box 10. The control of the energy storage device 300 by the sub-control box 30 and the main control box 10 includes, but is not limited to, controlling the charging and discharging functions of the energy storage device 300. Users can also control the power distribution component 100 via an APP using Bluetooth and WiFi.

[0043] Regarding power transmission, when the energy storage device 300 is being charged, the mains power grid 500 outputs power to the main control box 10. The main control box 10 can output power to the sub-control box 30 through the first line 50. The power can be used not only for the sub-control box 30's own operation, but also transmitted through the sub-control box 30 to the energy storage device 300 for storage. When the energy storage device 300 is discharging, it outputs power to the sub-control box 30. The sub-control box 30 can output power from the energy storage device 300 to the main control box 10 through the first line 50. Then, the main control box 10 can use the power from the energy storage device 300 to operate, output power from the energy storage device 300 to the load 700, and upload power from the energy storage device 300 to the mains power grid 500. It should be noted that the power distribution component 100 of this application is compatible with different global mains power grids 500 and energy storage devices 300. During the compatibility process, attention should be paid to the voltage range of different energy storage devices 300 to ensure that the voltage of the energy storage device 300 matches the voltage of other components in the power grid system.

[0044] For example, the main control box 10 can be installed outdoors in a location that meets the safety regulations and customs requirements of some countries and regions. The sub-control box 30 and the energy storage device 300 can be installed in a basement or other locations at a greater distance that meet safety regulations, thus preventing the energy storage device 300 from getting wet outdoors and extending its lifespan.

[0045] The power distribution component 100 of this application solves the problem that traditional integrated power distribution components require installation close to energy storage devices, which are generally limited to indoor applications, resulting in high installation costs and inconvenience. For example, when traditional power distribution components require installation together with energy storage devices outdoors, the energy storage device needs a space with an IP rating or higher for waterproofing, leading to high costs. Alternatively, when traditional power distribution components are installed indoors and energy storage devices outdoors, holes need to be drilled in the wall, the power distribution unit and energy storage device need to be very close, and the integrated connection cable between the energy storage device and the distribution box needs to be customized, making installation complex.

[0046] In the power distribution component 100 of this application, the main control box 10 and the sub-control box 30 are connected through the first line 50 to realize power transmission and communicate via PLC, without the need for additional communication lines. The power distribution component 100 realizes integrated power supply and communication. The main control box 10 and the sub-control box 30 can be arranged separately without being restricted by distance, which improves the installation flexibility of the power distribution component 100. The main control box 10 can be installed in one location as needed, while the sub-control box 30 and the energy storage device 300 can also be installed in another location as needed. Theoretically, it can realize power supply and communication over a distance of kilometers. The communication distance is higher than that of general industrial communication methods, which expands the application scenarios and scope of use of the power distribution component 100 and the energy storage device 300.

[0047] Please see Figure 2 In some embodiments, the first line 50 includes a ground wire PE1, at least one live wire (first live wire L1 and second live wire L2), and a neutral wire N1. The sub-control box 30 and the main control box 10 communicate via the neutral wire and any one of the live wires (first live wire L1 or second live wire L2) using power line carrier communication. Power transmission between the sub-control box 30 and the main control box 10 occurs via the ground wire PE1, all the live wires (first live wire L1 and second live wire L2), and the neutral wire N1.

[0048] Specifically, the grounding wire PE1 of the first line 50 is used to connect the power distribution component 100 and the ground, serving to stabilize the potential, ensure electrical safety, prevent leakage in the power distribution component 100, and provide a reference potential for the transmission of electrical energy within the power distribution component 100. The live wire of the first line 50 is the main line for electrical energy transmission, and electrical energy can be transmitted from the mains grid 500 or the energy storage device 300 to the load 700 through the live wires (first live wire L1 and second live wire L2). When the energy storage device 300 is charging, electrical energy from the mains grid 500 can also be output to the energy storage device 300 through the live wires. When the energy storage device 300 is discharging, electrical energy from the energy storage device 300 can be uploaded to the mains grid 500. The neutral wire N of the first line 50 is used to cooperate with the live wires to form a current loop, ensuring that the current can flow normally. Furthermore, there are two live wires in this application, namely the first live wire L1 and the second live wire L2.

[0049] In terms of PLC communication, the sub-control box 30 and the main control box 10 communicate via the neutral line N1 and any one of the live wires. That is, PLC communication can be between the neutral line N1 and the first live wire L1, or between the neutral line N1 and the second live wire L2; it is not limited in this application. The following application uses the neutral line N1 and the second live wire L2 as an example of PLC communication, and other embodiments of this application also include at least the beneficial effects of using the neutral line N1 and the second live wire L2 as an example of PLC communication. The neutral line N1 is relatively stable with small potential fluctuations, providing a relatively stable signal transmission environment for PLC communication. Furthermore, the voltage difference between the live wire and the neutral line N1 facilitates the loading and detection of PLC signals, which is beneficial for the transmission and reception of PLC signals. Other combinations are also possible in other embodiments of this application. It should be noted that the first line 50 in the example above is a configuration of grounding wire PE1, first live wire L1, second live wire L2, and neutral wire N1 (i.e., L1, L2, N, and PE). However, in other embodiments of this application, the first line 50 is not limited to this type. For example, the type of the first line 50 can also be a standard configuration (a line configuration conforming to Chinese power system standards or specifications). The first line 50 may include A live wire, B live wire, C live wire, neutral wire N1, and grounding wire PE1. A live wire, B live wire, and C live wire represent three different phases of the live wires, i.e., the three phase wires of a three-phase power supply. When the type of the first line 50 is a standard configuration, the power distribution component 100 can arbitrarily select one or more of the A live wire, B live wire, and C live wire to cooperate with the neutral wire N1 for PLC communication.

[0050] Please see Figure 3 In some embodiments, the main control box 10 includes a main PLC coupler 11, a main relay 13, a first switching power supply 15, and a main processor 17. The main PLC coupler 11 includes a primary coil 111 and a secondary coil 113. The primary coil 111 of the main PLC coupler 11 is electrically connected to the neutral line N1 and any one of the live wires (the first live wire L1 or the second live wire L2). The main relay 13 is electrically connected to the ground line PE1, the neutral line N1, and all the live wires (the first live wire L1 and the second live wire L2). The first switching power supply 15 is electrically connected to the primary coil 111 of the main PLC coupler 11. The main processor 17 is electrically connected to the first switching power supply 15, the main relay 13, and the secondary coil 113 of the main PLC coupler 11, respectively.

[0051] Specifically, the main PLC coupler 11 is used to extract PLC communication signals from the first line 50. The primary coil 111 of the main PLC coupler 11 is electrically connected to both the neutral line N1 and the second live line L2, used to couple PLC signals onto the neutral line N1 and the second live line L2 to achieve PLC signal loading and transmission. The secondary coil 111 of the main PLC coupler 11 is used to receive and decouple PLC signals for subsequent PLC signal processing and control.

[0052] The main relay 13 is electrically connected to the grounding wire PE1, the neutral wire N1, the first live wire L1 and the second live wire L2, and is used to control the on and off of the first live wire L1 and the second live wire L2, thereby controlling the transmission of electrical energy between the main control box 10 and the sub-control box 30.

[0053] The first switching power supply 15 is used to convert the input voltage transmitted from the energy storage device 300 to the main control box 10 via the sub-control box 30 into a stable DC output power supply. That is, the first switching power supply 15 can draw power from AC and convert it to DC power. For example, when the main processor 17 requires low-voltage DC power to operate, the first switching power supply 15 can obtain high-voltage AC power from the primary coil 111 of the main PLC coupler 11 and convert it into low-voltage DC power for use by the main processor 17. In addition, the first switching power supply 15 can also supply power to the primary coil 111 and secondary coil 113 of the main PLC coupler 11, ensuring the loading and transmission of PLC signals. Compared with traditional linear power supplies, the first switching power supply 15 has the advantages of small size, high efficiency, and low heat generation.

[0054] The main processor 17 is electrically connected to the first switching power supply 15, the main relay 13, and the secondary coil 113 of the main PLC coupler 11, and can control these components. More specifically, the main processor 17 can control the power of the first switching power supply 15. For example, when the power distribution component 100 needs to save energy, the main processor 17 can reduce the output power of the first switching power supply 15 to reduce energy consumption. When the main processor 17 detects an increase in the load 700 of the secondary coil 113 of the main PLC coupler 11, requiring more power to maintain the transmission strength of the PLC signal, the main processor 17 can increase the output of the first switching power supply 15 to ensure stable transmission of the PLC signal. The main processor 17 can receive and process the PLC signal decoupled from the secondary coil 113 of the main PLC coupler 11 to control the PLC signal. The main processor 17 can also send control signals to adjust the on / off state of the main relay 13 to manage power transmission. For example, when the power distribution component 100 detects an overload or fault in a live wire (e.g., the second live wire L2), the main processor 17 can send a control signal to control the main relay 13 to disconnect the connection of the second live wire L2. When it is necessary to restore power supply or switch the power transmission path, the main processor 17 can control the main relay 13 to reconnect the power transmission line (e.g., the first line 50). Exemplarily, the main processor 17 of this application is a microcontroller unit (MCU). The main processor 17 can also control the sub-control box 30, and indirectly control the energy storage device 300 through the sub-control box 30. Exemplarily, the main processor 17 can control the charging and discharging of the energy storage device 300.

[0055] Please see Figure 4 In some embodiments, the main relay 13 includes a first switch 131, a second switch 132, a first mains input terminal 133, a second mains input terminal 134, a first sub-control input terminal 135, a second sub-control input terminal 136, a first load output terminal 137, and a second load output terminal 138. The first switch 131 is connected between the first mains input terminal 133 and the first load output terminal 137. The first switch 131 is also connected between the first sub-control input terminal 135 and the first load output terminal 137. The second switch 132 is connected between the second mains input terminal 134 and the second load output terminal 138. The second switch 132 is also connected between the second sub-control input terminal 136 and the second load output terminal 138.

[0056] Specifically, the way the mains power grid 500 is electrically connected to the main relay 13 and the way the load 700 is electrically connected to the main relay 13 are the same as the way the sub-control box 30 is electrically connected to the main relay 13. That is, the mains power grid 500 has two live wires (first live wire S1 and second live wire S2), a neutral wire N2 and a ground wire PE2, and the load 700 has two live wires (first live wire F1 and second live wire F2), a neutral wire N3 and a ground wire PE3. Specifically, the first live wire S1 of the mains power grid 500 is electrically connected to the first mains power input terminal 133, and the second live wire S2 of the mains power grid 500 is electrically connected to the second mains power input terminal 134; the first live wire L1 of the first line 50 is electrically connected to the first sub-control input terminal 135, and the second live wire L2 of the first line 50 is electrically connected to the second sub-control input terminal 136; the first live wire F1 of the load 700 is electrically connected to the first load output terminal 137, and the second live wire F2 of the load 700 is electrically connected to the second load output terminal 138; the grounding wire PE1 of the first line 50, the grounding wire PE2 of the mains power grid 500, and the grounding wire PE3 of the load 700 are directly connected or selectively connected through the main relay 13; the neutral wire N1 of the first line 50, the neutral wire N2 of the mains power grid 500, and the neutral wire of the load 700 are directly connected or selectively connected through the main relay 13. Furthermore, the sub-control box 30 is electrically connected to the energy storage device 300. In this way, the power grid system 1000 can realize the electrical connection between the main control box 10, the mains power grid 500, the sub-control box 30, the energy storage device 300 and the load 700, thereby realizing the transmission of electrical energy and PLC communication within the power grid system 1000.

[0057] The first switch 131 can control the electrical connection between the first live wire S1 of the mains power grid 500 and / or the first live wire L1 of the first line 50 and the first live wire F1 of the load 700. The second switch 132 can control the electrical connection between the second live wire S2 of the mains power grid 500 and / or the second live wire L2 of the first line 50 and the second live wire F2 of the load 700. Thus, the main relay 13 can control and switch the connection between the mains power grid 500 or the sub-control box 30 and the load 700 by controlling the opening and closing of the first switch 131 and the second switch 132, thereby switching the power transmission between the mains power grid 500 and the load 700, as well as the power transmission between the energy storage device 300 and the load 700.

[0058] When the first switch 131 and the second switch 132 are closed, the first switch 131 controls the electrical connection between the first live wire S1 of the mains grid 500 and the first live wire F1 of the load 700, and the second switch 132 controls the electrical connection between the second live wire S2 of the mains grid 500 and the second live wire F2 of the load 700. Electrical energy from the mains grid 500 can flow in from the first mains input terminal 133 and the second mains input terminal 134, and be transmitted to the load 700 through the first load output terminal 137 and the second load output terminal 138. When the energy storage device 300 is charging, electrical energy from the mains grid 500 can also flow in from the first mains input terminal 133 and the second mains input terminal 134, and be transmitted to the energy storage device 300 through the first sub-control input terminal 135 and the second sub-control input terminal 136.

[0059] When the first switch 131 and the second switch 132 are closed, the first switch 131 controls the electrical connection between the first live wire L1 of the first line 50 and the first live wire F1 of the load 700, and the second switch 132 controls the electrical connection between the second live wire L2 of the first line 50 and the second live wire F2 of the load 700. The electrical energy of the energy storage device 300 can then flow through the sub-control box 30 from the first sub-control input terminal 135 and the second sub-control input terminal 136, and be transmitted to the load 700 through the first load output terminal 137 and the second load output terminal 138. When the energy storage device 300 is discharging, the electrical energy of the energy storage device 300 can also flow through the sub-control box 30 from the first sub-control input terminal 135 and the second sub-control input terminal 136, and be uploaded to the mains power grid 500 through the first mains input terminal 133 and the second mains input terminal 134.

[0060] When the first switch 131 and the second switch 132 are closed, the energy stored in the energy storage device 300 and the mains power grid 500 can be simultaneously transferred to the load 700 while the energy storage device 300 is discharging. The energy stored in the energy storage device 300 can also be transferred to the mains power grid 500 while discharging. The energy stored in the energy storage device 300 can also be transferred to the mains power grid 500 while charging. When the first switch 131 and / or the second switch 132 are open, neither the energy stored in the energy storage device 300 nor the mains power grid 500 can be transferred to the load 700, and there is no mutual transfer of energy between the energy storage device 300 and the mains power grid 500 (i.e., the energy storage device 300 cannot charge or discharge).

[0061] Please see Figure 5In some embodiments, the sub-control box 30 includes a sub-PLC coupler 31, a power supply 33, a second switching power supply 35, and a sub-processor 37. The power supply 33 is electrically connected to the energy storage device 300. The sub-PLC coupler 31 includes a primary coil 311 and a secondary coil 313. The secondary coil 313 of the sub-PLC coupler 31 is electrically connected to the primary coil 111 of the main PLC coupler 11 via a neutral line N1 and any one of the live wires (first live wire L1 and second live wire L2). The second switching power supply 35 is electrically connected to the primary coil 311 of the sub-PLC coupler 31 and the power supply 33, respectively. The sub-processor 37 is electrically connected to the secondary coil 313 of the sub-PLC coupler 31 and the power supply 33, respectively, and is also electrically connected to the energy storage device 300.

[0062] Specifically, the sub-PLC coupler 31 is used to extract PLC communication signals from the first line 50. The primary coil 311 of the sub-PLC coupler 31 is electrically connected to both the neutral line N1 and the second live line L2, used to couple PLC signals onto the neutral line N1 and the second live line L2 to achieve PLC signal loading and transmission. The secondary coil 313 of the sub-PLC coupler 31 is used to receive and decouple PLC signals for subsequent PLC signal processing and control.

[0063] The power supply 33 is used to convert the input voltage transmitted from the energy storage device 300 to the sub-control box 30 into a stable DC output power. That is, the power supply 33 can draw power from AC and convert it to DC power. For example, if the sub-processor 37 requires low-voltage DC power to operate, the power supply 33 can obtain high-voltage AC power from the energy storage device 300 and convert it to low-voltage DC power for use by the sub-processor 37. In addition, the power supply 33 can also ensure the loading and transmission of PLC signals for other components in the sub-control box 30.

[0064] The second switching power supply 35 is used to receive AC power transmitted from the main control box 10 to the sub-control box 30, and convert the AC power into DC power to be transmitted to the power supply 33. Then, the power is transmitted through the power supply 33 to the sub-processor 37 and other components of the sub-control box 30 to ensure that the sub-control box 30 can obtain power from the energy storage device 300 or the mains power grid 500 connected to the main control box 10.

[0065] The sub-processor 37 is electrically connected to the power supply 33 and the secondary coil 313 of the sub-PLC coupler 31, respectively, and can control these components. More specifically, the sub-processor 37 can control the power of the power supply 33. For example, when the power distribution component 100 needs to save energy, the sub-processor 37 can reduce the output power of the power supply 33 to reduce energy consumption. When the sub-processor 37 detects an increase in the load 700 of the primary coil 311 of the sub-PLC coupler 31, requiring more electrical energy to maintain the transmission strength of the PLC signal, the sub-processor 37 can increase the output of the power supply 33 to ensure stable transmission of the PLC signal. The sub-processor 37 can receive and process the PLC signal decoupled from the secondary coil 313 of the sub-PLC coupler 31 to control the PLC signal. Exemplarily, the sub-processor 37 of this application is an MCU. The sub-processor 37 can also control the energy storage device 300 and can also be controlled by the main processor 17. Exemplarily, the sub-processor 37 can control the charging and discharging of the energy storage device 300.

[0066] Please see Figure 6 In some embodiments, the power grid system 1000 further includes a second line 70, which includes a first wiring harness 71. The first wiring harness 71 includes a power supply line 711, a communication line 713, and a signal line 715. The power supply line 711 is connected to the power supply 33, and the signal line 715 and the communication line 713 are both connected to the subprocessor 37.

[0067] Specifically, one end of the power supply line 711 is connected to the energy storage device 300, and the other end is connected to the power supply 33, providing power support for the components within the sub-processor 37 and other sub-control boxes 30. One end of the communication line 713 is connected to the sub-processor 37, and the other end is connected to the energy storage device 300. The communication line 713 can transmit control commands from the sub-processor 37 to the energy storage device 300 to achieve control and monitoring of the energy storage device 300. Control commands include, but are not limited to, charging commands, discharging commands, or feedback fault information. The communication line 713 can also indirectly transmit control commands from the main processor 17 to the energy storage device through the sub-processor 37. The communication line 713 can also transmit information from the energy storage device 300 to the sub-processor 37, and transmit information from the energy storage device 300 to the main processor 17. The signal line 715, i.e., the I / O line, is connected to the sub-processor 37 at one end and to various sensors and actuators of the energy storage device 300 at the other end. Signal line 715 is used to collect and transmit operating parameters of energy storage device 300 (such as power, temperature, etc.) and send control signals to actuators, thereby assisting subprocessor 37 in monitoring the operating status of energy storage device 300.

[0068] Please see Figure 6In some embodiments, the mains power grid 500 is electrically connected to the main relay 13 of the main control box 10. The load 700 and / or the household distribution box are also electrically connected to the main relay 13 of the main control box 10. Thus, the main relay 13 can control the on / off state of the mains power grid 500 and the load 700 relative to the main control box 10, and can also indirectly control the on / off state of the mains power grid 500 and the load 700 relative to the sub-control box 30 and the energy storage device 300, thereby controlling the power transmission between the mains power grid 500 and the load 700 and other components of the power grid system 1000.

[0069] Please see Figure 7 and Figure 8 In some embodiments, the second line 70 further includes a second wiring harness 73, which includes an energy storage grounding wire PE4, at least one energy storage live wire, and an energy storage neutral wire N4. The grounding wire PE1, the energy storage live wire, and the energy storage neutral wire N4 of the second wiring harness 73 are respectively connected to the grounding wire PE1, the live wire, and the neutral wire of the first line 50.

[0070] Specifically, the energy storage grounding wire PE4 is connected to the grounding wire PE1 of the first line 50 to ensure that the potential of the energy storage device 300 is consistent with the grounding potential of the power grid system 1000. The energy storage live wire is connected to the live wire of the first line 50, forming the main channel for power transmission, enabling power to be transmitted from the energy storage device 300 to the sub-control box 30, and from the sub-control box 30 to the main control box 10, the mains power grid 500, and the load 700, thus realizing the power supply from the energy storage device 300 to the power grid system 1000, and the power from the mains power grid 500 can also be transmitted to the energy storage device 300. More specifically, the energy storage live wire includes a first energy storage live wire C1 and a second energy storage live wire C2. The first energy storage live wire C1 is connected to the first live wire L1 of the first line 50, and the second energy storage live wire C2 is connected to the second live wire L2 of the first line 50. The energy storage neutral line N4 is connected to the neutral line N1 of the first line 50, and together with the live wire, they form a current loop to ensure the normal flow of current.

[0071] Please see Figure 9 In some embodiments, the sub-control box 30 also includes a sub-relay 39, which is electrically connected to the sub-processor 37. The energy storage fire wire of the second wiring harness 73 is connected to the sub-relay 39, and the first line 50 is connected to the sub-relay 39.

[0072] Specifically, the relay 39 is electrically connected to the first energy storage live wire C1 and the second energy storage live wire C2, and can control the on / off state of the first energy storage live wire C1 and the second energy storage live wire C2, thereby controlling the transmission of electrical energy between the energy storage device 300 and the control box 30. The processor 37 can also send control signals to adjust the on / off state of the relay 39 to manage the transmission of electrical energy. For example, when the power distribution component 100 detects an overload or fault in a live wire (e.g., the second energy storage live wire C2), the processor 37 can send a control signal to control the relay 39 to disconnect the connection of the second energy storage live wire C2; ​​when it is necessary to restore power supply or switch the power transmission path, the processor 37 can control the relay 39 to reconnect the second wiring harness 73.

[0073] In the description of this specification, the references to terms such as "some embodiments," "in one example," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Any process or method description in the flowchart or otherwise herein can be understood as representing a component, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order according to the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0075] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A power distribution component, characterized in that, include: The main control box is used for electrical connection to the mains power grid and for electrical connection to loads and / or household distribution boxes; The sub-control box is set separately from the main control box and is used for electrical connection with the energy storage device; and The first line electrically connects the sub-control box and the main control box, through which power is transmitted between the sub-control box and the main control box, and through which communication is performed in the form of power line carrier.

2. The power distribution component according to claim 1, characterized in that, The first line includes a grounding wire, at least one live wire, and a neutral wire. The sub-control box and the main control box communicate via the neutral wire and any one of the live wires using power line carrier communication. The sub-control box and the main control box transmit power via the grounding wire, all the live wires, and the neutral wire.

3. The power distribution component according to claim 1, characterized in that, The first line includes a ground wire, at least one live wire, and a neutral wire; the main control box includes: The main PLC coupler includes a primary coil and a secondary coil, wherein the primary coil of the main PLC coupler is electrically connected to the neutral line and any one of the live wires; The main relay is electrically connected to the ground wire, the neutral wire, and all the live wires. The first switching power supply is electrically connected to the primary coil of the main PLC coupler; and The main processor is electrically connected to the secondary coils of the first switching power supply, the main relay, and the main PLC coupler, respectively.

4. The power distribution component according to claim 3, characterized in that, The main relay includes: First switch and second switch; First AC power input terminal and second AC power input terminal; The first sub-control input terminal and the second sub-control input terminal; and First load output terminal and second load output terminal; The first switch is connected between the first mains input terminal and the first load output terminal, and the first switch is also connected between the first sub-control input terminal and the first load output terminal; the second switch is connected between the second mains input terminal and the second load output terminal, and the second switch is also connected between the second sub-control input terminal and the second load output terminal.

5. The power distribution component according to claim 3, characterized in that, The control box includes: A power supply is electrically connected to the energy storage device; A sub-PLC coupler includes a primary coil and a secondary coil. The secondary coil of the sub-PLC coupler is electrically connected to the primary coil of the main PLC coupler through the neutral line and any one of the live wires. The second switching power supply is electrically connected to the primary coil of the sub-PLC coupler and the power supply, respectively; and The sub-processor is electrically connected to the secondary coil of the sub-PLC coupler and the power supply, respectively. The sub-processor is also electrically connected to the energy storage device.

6. A power grid system, characterized in that, include: The power distribution component according to any one of claims 1 to 5.

7. The power grid system according to claim 6, characterized in that, The power grid system also includes: The energy storage device is electrically connected to the sub-control box; The mains power grid is electrically connected to the main relay of the main control box; and The load and / or household distribution box is electrically connected to the main relay of the main control box.

8. The power grid system according to claim 7, characterized in that, The grounding wire of the first line, the grounding wire of the mains power grid, and the grounding wire of the load and / or the household distribution box are all connected. The neutral wire of the first line, the neutral wire of the mains power grid, and the neutral wire of the load and / or the household distribution box are all connected.

9. The power grid system according to claim 7, characterized in that, The power grid system also includes a second line, which includes a first wiring harness. The first wiring harness includes a power supply line, a communication line, and a signal line. The power supply line is connected to the power supply of the sub-control box, and the signal line and the communication line are both connected to the sub-processor of the sub-control box.

10. The power grid system according to claim 9, characterized in that, The second line also includes a second wiring harness, which includes an energy storage grounding wire, at least one energy storage live wire, and an energy storage neutral wire. The energy storage grounding wire, energy storage live wire, and energy storage neutral wire are respectively connected to the grounding wire, live wire, and neutral wire of the first line; or, The sub-control box also includes a sub-relay, which is electrically connected to the sub-processor. The energy storage fire wire of the second wiring harness is connected to the sub-relay, and the first line is connected to the sub-relay.

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