Energy storage power supply system and on-grid and off-grid sockets

Abstract

This application discloses an energy storage power supply system and an on / off grid socket. The energy storage power supply system includes an integrated energy storage unit, an on / off grid socket, and a bypass switch. The integrated energy storage unit includes a grid-connected port and an off-grid port. The on / off grid socket forms a grid-connected socket and an off-grid socket. The grid-connected socket is connected to the grid-connected port via a first pluggable connector, and the off-grid socket is connected to the off-grid port via a second pluggable connector. The bypass switch is connected between the grid-connected socket and the off-grid socket. The bypass switch is configured to close when the integrated energy storage unit is operating in grid-connected mode, supplying power to the sub-distribution box with electricity from the grid. When a grid power outage is detected and the integrated energy storage unit switches to off-grid operation, the bypass switch opens, supplying power to the sub-distribution box with electricity from the integrated energy storage unit, maintaining power continuity during the switching process. The first and second pluggable connectors are configured to allow removal from the on / off grid socket. The energy storage power supply system of this application is beneficial for meeting more user needs.

Description

Technical Field

[0001] This application relates to the field of energy storage power supply equipment technology, and more specifically, to an energy storage power supply system and an on-grid / off-grid socket. Background Technology

[0002] Home energy storage systems are large-capacity, fixed energy storage devices that require professional installation and line modifications. Their core function is to store surplus or off-peak electricity from photovoltaic systems to improve energy self-sufficiency, save on electricity bills, and automatically and seamlessly switch to provide uninterrupted power to important or whole-house loads during grid outages.

[0003] Balcony photovoltaic-storage systems are miniaturized, modular, and plug-and-play energy storage devices that require no wiring modifications. Their core function is to generate electricity using balcony space to power low-power loads and reduce electricity costs. They are also portable (suitable for outdoor use). However, during a grid outage, the grid connection will stop supplying power, and the loads on the corresponding branch connected to the grid connection will also lose power. Users must manually switch the load plugs to the off-grid port to restore power, thus failing to provide uninterrupted power supply.

[0004] While professionally modifying the household wiring connecting the balcony solar energy storage system to the external network can achieve uninterrupted power supply, for safety reasons, users cannot arbitrarily alter the modified external wiring. This would cause the balcony solar energy storage system to lose its crucial portable attribute, meaning users could no longer unplug the system and take it outdoors. Therefore, current technology lacks a solution that can maintain the portability of the balcony solar energy storage system while ensuring uninterrupted power supply to the core load. Utility Model Content

[0005] This application provides an energy storage power supply system and an on / off grid socket to solve at least one of the aforementioned technical problems.

[0006] The energy storage power supply system according to the embodiments of this application includes:

[0007] Integrated energy storage unit, which includes grid-connected port and off-grid port;

[0008] Off-grid socket, wherein the off-grid socket is formed as follows:

[0009] A grid-connected socket is connected to the grid-connected port of the integrated energy storage unit via a first pluggable connector. The grid-connected socket is configured to be electrically connected to the main distribution box on the grid side.

[0010] Off-grid port, which is connected to the off-grid port of the energy storage unit via a second pluggable connector, and the off-grid port is configured to be electrically connected to the sub-distribution box on the core load side;

[0011] A bypass switch, wherein the bypass switch is connected between the grid-connected socket and the off-grid socket;

[0012] The bypass switch is configured to close when the energy storage unit is connected to the grid, and the power supplied by the grid is supplied to the sub-distribution box through the main distribution box and the bypass switch, and / or the power supplied by the energy storage unit is supplied to the sub-distribution box through the grid connection port, the first pluggable connector, the grid connection plug, the bypass switch and the off-grid socket;

[0013] The bypass switch is configured to disconnect when a grid power outage is detected and the energy storage unit switches to off-grid operation. The power provided by the energy storage unit supplies power to the sub-distribution box through the off-grid port, the second pluggable connector and the off-grid plug, and maintains the continuity of power supply to the sub-distribution box during the switching process.

[0014] The first and second pluggable connectors are configured to allow unplugging from the grid-connected socket to detach the energy storage unit from the grid-connected socket.

[0015] The energy storage power supply system provided in this application, on the one hand, achieves coordinated power supply between the grid and the integrated energy storage unit when connected to the grid, and a smooth transition between grid isolation and independent power supply of the integrated energy storage unit when disconnected from the grid, by setting a bypass switch, thus ensuring the flexibility and reliability of the energy storage power supply system. On the other hand, it achieves pluggable connection between the integrated energy storage unit and the distribution box through grid-connected and disconnected sockets and pluggable connectors, realizing "plug and play" while ensuring the original grid-connected and disconnected functions, which is convenient for installation, maintenance and replacement. At the same time, it is convenient for users to move the integrated energy storage unit to other places where power is needed, which helps to meet more user needs.

[0016] In some embodiments, the integrated energy storage unit further includes a power supply terminal, a first switch, a second switch, and an energy storage converter. The power supply terminal is connected to the grid-connected port via the first switch, and the power supply terminal is connected to the off-grid port via the second switch. The energy storage converter is configured to detect the grid voltage of the grid-connected port, and control the first switch to close and the second switch to open to connect the power supply terminal to the grid-connected port when the grid voltage is greater than a preset voltage, and control the second switch to close and the first switch to open to connect the power supply terminal to the off-grid port when the grid voltage is less than or equal to the preset voltage.

[0017] In this way, by detecting the grid voltage in real time and automatically switching the first / second switch through the energy storage converter, intelligent switching between grid-connected and off-grid working modes is realized, ensuring the continuity of power supply and response speed of core loads when the grid is abnormal.

[0018] In some embodiments, the energy storage converter is communicatively connected to the bypass switch and configured to control the bypass switch to close when the first switch is closed, and to control the bypass switch to open when the second switch is closed.

[0019] In this way, the automatic matching of bypass status and working mode is achieved through the linkage control of energy storage converter and bypass switch, avoiding the risk of power backflow in off-grid mode.

[0020] In some embodiments, the energy storage power supply system includes a current transformer (CT) switch and a photovoltaic power generation system. The photovoltaic power generation system is connected to the main distribution box, which is connected to the power grid via the CT switch. The energy storage converter is communicatively connected to the bypass switch and is configured to control the CT switch and the bypass switch to close when the first switch is closed, and to control the CT switch to open and the bypass switch to close when the second switch is closed.

[0021] In this way, by synchronously controlling the CT switch and bypass switch to close when connected to the grid and disconnecting the CT switch while keeping the bypass closed when disconnected from the grid, the photovoltaic power generation system is intelligently isolated from the grid, which helps to ensure the system safety and compliance during off-grid operation.

[0022] In some embodiments, the energy storage power supply system includes a current transformer (CT) switch and a photovoltaic power generation system. The photovoltaic power generation system is connected to the main distribution box, which is connected to the power grid via the CT switch. The bypass switch and the CT switch are communicatively connected to a remote user terminal. The bypass switch and the CT switch are configured to be controlled by the remote user terminal to open the CT switch and close the bypass switch when the second switch is closed.

[0023] In this way, the CT switch can be directly controlled to open and the bypass switch to close via a remote user terminal, which facilitates manual intervention to manage the grid connection status when the energy storage unit is working off-grid, thus enhancing the flexibility of system operation and emergency response capabilities.

[0024] In some embodiments, the energy storage converter is communicatively connected to the bypass switch and configured to detect the current and voltage signals at the power supply terminal, and control the bypass switch to close in the event of an abnormal current and voltage signal.

[0025] In this way, by monitoring abnormal signals at the power supply end and forcibly closing the bypass switch through the energy storage converter, rapid power supply switching in case of fault is achieved, which is beneficial to the power supply safety of core loads and equipment protection.

[0026] In some embodiments, the integrated energy storage device includes a photovoltaic module and a battery pack, the photovoltaic module and the battery pack being connected to the power supply terminal via a control circuit. The energy storage converter is configured to control the control circuit to supply power to the photovoltaic module and / or the battery pack at a constant current through the power supply terminal when the first switch is closed, and to control the control circuit to supply power to the photovoltaic module and / or the battery pack at a constant voltage through the power supply terminal when the second switch is closed.

[0027] In this way, by controlling the photovoltaic / battery pack to supply power in constant current (grid-connected) or constant voltage (off-grid) modes, dynamic matching of energy output characteristics and load demand is achieved, which is conducive to improving energy utilization efficiency and extending equipment life.

[0028] In some embodiments, the integrated energy storage unit further includes a main switch, and the power supply terminal is connected to the first switch and the second switch through the main switch.

[0029] In this way, the power input of the first / second switch is managed uniformly through the main switch, which facilitates the overall power outage maintenance of the energy storage unit and improves the safety and convenience of system maintenance.

[0030] In some embodiments, the first pluggable connector and the second pluggable connector are fixedly connected to the off-grid socket by means of snap-fit ​​or threaded connection.

[0031] In this way, by using snap-fit ​​or threaded fasteners to secure the connectors, the grid-connected and off-grid sockets and energy storage units can be quickly disassembled and assembled while complying with relevant regulations, facilitating equipment relocation, replacement, and on-site deployment.

[0032] In some embodiments, the grid-connected socket and the off-grid socket are respectively connected to the main distribution box and the sub-distribution box via independent lines.

[0033] In this way, by designing independent lines for grid-connected and off-grid sockets, mutual interference between grid-connected and off-grid circuits is avoided, which helps to ensure the stability and reliability of dual-path power supply.

[0034] Another embodiment of this application provides a grid-connected / off-grid socket for an energy storage power supply system, the energy storage power supply system including an integrated energy storage unit, the integrated energy storage unit including a grid-connected port and an off-grid port, and the grid-connected / off-grid socket including:

[0035] A grid-connected socket is connected to the grid-connected port of the integrated energy storage unit via a first pluggable connector. The grid-connected socket is configured to be electrically connected to the main distribution box on the grid side.

[0036] Off-grid port, which is connected to the off-grid port of the energy storage unit via a second pluggable connector, and the off-grid port is configured to be electrically connected to the sub-distribution box on the core load side;

[0037] A bypass switch, wherein the bypass switch is connected between the grid-connected socket and the off-grid socket;

[0038] The bypass switch is configured to close when the energy storage unit is connected to the grid, and the power supplied by the grid is supplied to the sub-distribution box through the main distribution box and the bypass switch, and / or the power supplied by the energy storage unit is supplied to the sub-distribution box through the grid connection port, the first pluggable connector, the grid connection plug, the bypass switch and the off-grid socket;

[0039] The bypass switch is configured to disconnect when a grid power outage is detected and the energy storage unit switches to off-grid operation. The power provided by the energy storage unit supplies power to the sub-distribution box through the off-grid port, the second pluggable connector and the off-grid plug, and maintains the continuity of power supply to the sub-distribution box during the switching process.

[0040] The first and second pluggable connectors are configured to allow unplugging from the grid-connected socket to detach the energy storage unit from the grid-connected socket.

[0041] Thus, by integrating a bypass switch and a dual-socket design, efficient path management of the grid-energy storage-load is achieved, facilitating seamless switching to off-grid power supply and maintaining load continuity when the grid is interrupted.

[0042] Additional aspects and advantages of embodiments 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 embodiments of this application. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0044] Figure 1 This is a circuit diagram of the energy storage power supply system according to an embodiment of this application;

[0045] Figure 2 This is a schematic diagram of the integrated energy storage unit of the energy storage power supply system according to the embodiments of this application;

[0046] Figure 3This is a circuit diagram of the integrated energy storage unit of the energy storage power supply system according to the embodiments of this application;

[0047] Figure 4 This is a circuit diagram of the grid-connected and off-grid socket of the energy storage power supply system according to the embodiments of this application;

[0048] Figure 5 This is a flowchart illustrating the control method of an energy storage power supply system according to certain embodiments of this application;

[0049] Figure 6 This is a flowchart illustrating the control method of an energy storage power supply system according to certain embodiments of this application;

[0050] Figure 7 This is a flowchart illustrating the control method of an energy storage power supply system according to certain embodiments of this application.

[0051] Key component symbols: Energy storage power supply system 100, integrated energy storage unit 10, grid-connected port 11, off-grid port 12, power supply terminal 13, first switch 14, second switch 15, energy storage converter 16, photovoltaic module 17, control circuit 18, DC / DC circuit 181, DC / AC circuit 182, battery pack 19, main switch 110, grid-connected / off-grid socket 20, grid-connected socket 21, off-grid socket 22, bypass switch 23, communication module 24, CT switch 30, photovoltaic power generation system 40, first pluggable connector 50, second pluggable connector 60, power grid 200, main distribution box 300, sub-distribution box 400, photovoltaic panel 500. Detailed Implementation

[0052] The embodiments of this application are described in detail below. Examples of these embodiments are shown 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 embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0053] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0054] In 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.

[0055] This disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described herein. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0056] Home energy storage systems are large-capacity, fixed energy storage devices that require professional installation and line modifications. Their core function is to store surplus or off-peak electricity from photovoltaic systems to improve energy self-sufficiency, save on electricity bills, and automatically and seamlessly switch to provide uninterrupted power to important or whole-house loads during grid outages.

[0057] Balcony photovoltaic-storage systems are miniaturized, modular, and plug-and-play energy storage devices that require no wiring modifications. Their core function is to generate electricity using balcony space to power low-power loads and reduce electricity costs. They are also portable (suitable for outdoor use). However, during a grid outage, the grid connection will stop supplying power, and the loads on the corresponding branch connected to the grid connection will also lose power. Users must manually switch the load plugs to the off-grid port to restore power, thus failing to provide uninterrupted power supply.

[0058] While professionally modifying the household wiring connecting the balcony solar energy storage system to the external network can achieve uninterrupted power supply, for safety reasons, users cannot arbitrarily alter the modified external wiring. This would cause the balcony solar energy storage system to lose its crucial portable attribute, meaning users could no longer unplug the system and take it outdoors. Therefore, current technology lacks a solution that can maintain the portability of the balcony solar energy storage system while ensuring uninterrupted power supply to the core load.

[0059] Please see Figure 1 and Figure 2 The energy storage power supply system 100 of this application includes an integrated energy storage unit 10 and an on / off grid socket 20. The integrated energy storage unit 10 includes a grid-connected port 11 and an off-grid port 12. The on / off grid socket 20 forms a grid-connected socket 21, an off-grid socket 22, and a bypass switch 23. The grid-connected socket 21 is connected to the grid-connected port 11 of the integrated energy storage unit 10 through a first pluggable connector 50, and is configured to be electrically connected to the main distribution box 300 on the grid 200 side. The off-grid socket 22 is connected to the off-grid port 12 of the integrated energy storage unit 10 through a second pluggable connector 60, and is configured to be electrically connected to the sub-distribution box 400 on the core load side. The bypass switch 23 is connected between the grid-connected socket 21 and the off-grid socket 22. The bypass switch 23 is configured to close when the integrated energy storage unit 10 is operating in grid-connected mode. The power supplied by the grid 200 is supplied to the sub-distribution box 400 through the main distribution box 300 and the bypass switch 23, and / or the power supplied by the energy storage unit 10 is supplied to the sub-distribution box 400 through the grid connection port 11, the first pluggable connector 50, the grid connection plug, the bypass switch 23 and the off-grid socket 22; the bypass switch 23 is configured to disconnect when the grid 200 is detected to be de-energized and the energy storage unit 10 switches to off-grid operation, and the power supplied by the energy storage unit 10 is supplied to the sub-distribution box 400 through the off-grid port 12, the second pluggable connector 60 and the off-grid plug, and the power supply to the sub-distribution box 400 is maintained during the switching process; the first pluggable connector 50 and the second pluggable connector 60 are configured to allow unplugging from the grid connection / off-grid socket 20 so that the energy storage unit 10 is disconnected from the grid connection / off-grid socket 20.

[0060] The energy storage power supply system 100 provided in this application, on the one hand, realizes the coordinated power supply of the grid 200 and the integrated energy storage unit 10 when connected to the grid, and the smooth transition between the grid 200 isolation and the independent power supply of the integrated energy storage unit 10 when disconnected from the grid, by setting a bypass switch 23, ensuring the flexibility and reliability of the energy storage power supply system 100. On the other hand, the integrated energy storage unit 10 and the distribution box are pluggable and pluggable by the grid-connected and disconnected socket 20 and the pluggable connector, realizing "plug and play" while ensuring the original grid-connected and disconnected functions, which is convenient for installation, maintenance and replacement. At the same time, it is convenient for users to move the integrated energy storage unit 10 to other places where power is needed, which is conducive to meeting more user needs.

[0061] For details, please refer to Figures 1 to 4 Grid-connected operation refers to the energy storage power supply system 100 being directly connected to the public power grid 200 (national or regional power transmission network) for operation. Off-grid operation refers to the energy storage power supply system 100 operating independently, without any connection to the public power grid 200.

[0062] In this embodiment, the integrated energy storage unit 10 is provided with a grid-connected port 11 and an off-grid port 12, which are respectively connected to the corresponding sockets of the grid-connected and off-grid socket 20 through a first pluggable connector 50 and a second pluggable connector 60. The grid-connected socket 21 is directly connected to the main distribution box 300 on the grid side 200, and the off-grid socket 22 is connected to the core load sub-distribution box 400. A bypass switch 23 is provided between the two to form a key energy path.

[0063] When the system is in grid-connected mode, the bypass switch 23 remains closed. At this time, power from the grid 200 can directly supply power to the load via the main distribution box 300—bypass switch 23—sub-distribution box 400. Simultaneously, the energy storage unit 10 can also supply power to the load via the grid-connected port 11—first pluggable connector 50—grid-connected socket 21—bypass switch 23—off-grid socket 22—sub-distribution box 400, achieving shared power supply from the grid 200 and the energy storage unit 10. When a grid 200 power outage is detected, the energy storage unit 10 switches to off-grid mode, and the bypass switch 23 immediately opens to cut off the grid 200 path. At this time, power from the energy storage unit 10 flows from the off-grid port 12—second pluggable connector 60—off-grid socket 22 to the sub-distribution box 400 to supply power to the load.

[0064] In the embodiments of this application, please refer to Figure 2 The first pluggable connector 50 and the second pluggable connector 60 are detachably connected to the grid-connected socket 20. Users can manually pull out the first pluggable connector 50 and the second pluggable connector 60 to disconnect the energy storage unit 10 from the grid-connected socket 20, which facilitates equipment maintenance or emergency relocation.

[0065] Please see Figure 1 and Figure 3In some embodiments, the integrated energy storage unit 10 further includes a power supply terminal 13, a first switch 14, a second switch 15, and an energy storage converter 16. The power supply terminal 13 is connected to the grid-connected port 11 via the first switch 14, and the power supply terminal 13 is connected to the off-grid port 12 via the second switch 15. The energy storage converter 16 is configured to detect the grid voltage 200 at the grid-connected port 11, and control the first switch 14 to close and the second switch 15 to open to connect the power supply terminal 13 and the grid-connected port 11 when the grid voltage 200 is greater than a preset voltage, and control the second switch 15 to close and the first switch 14 to open to connect the power supply terminal 13 and the off-grid port 12 when the grid voltage 200 is less than or equal to the preset voltage.

[0066] In this way, by using the energy storage converter 16 to detect the voltage of the grid 200 in real time and automatically switch the first switch 14 or the second switch 15, the intelligent conversion between grid-connected and off-grid working modes is realized, ensuring the continuity of power supply to the core load and the response speed when the grid 200 is abnormal.

[0067] Specifically, the Power Conversion System (PCS) 16 is one of the core components of the integrated energy storage unit 10, undertaking the crucial tasks of bidirectional energy conversion and control. Its main function is to establish an efficient, flexible, and safe "bridge" between the energy storage battery (DC) and the power grid 200 or the load (AC), enabling the management of power charging and discharging and the switching of operating modes.

[0068] In this embodiment, the energy storage converter 16 acts as a control center to continuously monitor the voltage of the grid-connected port 11. When the grid voltage 200 is detected to be higher than the preset voltage, the first switch 14 is closed and the second switch 15 is opened, so that the power supply terminal 13 delivers electrical energy to the grid-connected port 11 in a directional manner. When the grid voltage 200 is lower than or equal to the preset voltage, the first switch 14 is immediately opened and the second switch 15 is closed, so that the energy path is switched to the off-grid port 12.

[0069] As is easily understood, the preset voltage can be dynamically adjusted according to the quality of the local power grid 200, and frequent switching is avoided through a hysteresis comparator circuit. For example, if the voltage of the power grid 200 is 230V, then when the voltage reaches 207V, the first switch 14 can be closed and the second switch 15 can be opened to achieve grid connection.

[0070] In this embodiment, the power supply terminal 13 serves as the total energy outlet, and after passing through the main switch 110, it is split into two paths: one path is connected to the grid-connected port 11 via the first switch 14, and the other path is connected to the off-grid port 12 via the second switch 15.

[0071] In this embodiment, the energy storage unit 10 further includes a photovoltaic module 17, a control circuit 18, and a battery pack 19. The control circuit 18 includes a DC / DC circuit 181 and a DC / AC circuit 182. The photovoltaic module 17 is used to connect to the photovoltaic panel 500 installed externally. The battery pack 19 is connected to the DC / DC circuit 181. Both the photovoltaic module 17 and the DC / DC circuit 181 are connected to the DC / AC circuit 182, and are connected to the first switch 14 and the second switch 15 through the DC / AC circuit 182.

[0072] Please see Figure 5 This application also provides a control method for an energy storage power supply system 100. It should be noted that the steps shown may be executed in a logical order different from that shown in the flowchart. The method may include the following steps:

[0073] Step 001: When the energy storage power supply system is in grid-connected state, obtain the grid voltage at the first switch;

[0074] Step 002: When the mains voltage is less than or equal to the preset voltage, control the first switch and the bypass switch to disconnect;

[0075] Step 003: Switch the control power supply to voltage source output;

[0076] Step 004: Control the second switch to close so that the energy storage power supply system enters the off-grid state.

[0077] Specifically, for example, the energy storage converter 16 can continuously compare the grid voltage 200 at the grid connection port 11 with the preset voltage. When the grid voltage 200 is less than or equal to the preset voltage and the duration is greater than 100ms, it determines that the grid 200 is faulty or the grid 200 is de-energized. Then, it immediately disconnects the first switch 14, controls the power supply terminal 13 to switch to the voltage source output mode, and finally closes the second switch 15 to achieve seamless switching.

[0078] Voltage source output refers to the power supply output terminal being forced to maintain a constant voltage (or change according to a set curve). Its output current is determined by the load impedance. Before switching to off-grid status, the power supply terminal must be controlled as a voltage source output to ensure the stability of system voltage and frequency and avoid equipment damage or system crash caused by sudden load changes.

[0079] For further details, please refer to Figure 5 In some embodiments, the control method further includes:

[0080] Step 001: When the energy storage power supply system is in an off-grid state, obtain the grid voltage at the first switch;

[0081] Step 005: When the mains voltage is greater than the preset voltage, control the second switch and the bypass switch to disconnect;

[0082] Step 006: Switch the power supply to current source output;

[0083] Step 007: Control the first switch and the bypass switch to close, so that the energy storage power supply system enters the grid-connected state.

[0084] Specifically, for example, the energy storage converter 16 continuously monitors the voltage of the grid-connected port 11 in the off-grid state. When the voltage recovers to a level greater than the preset voltage and the stabilization time exceeds 500ms, the switching is initiated: first, the second switch 15 is disconnected to cut off the off-grid path; then, the power supply terminal 13 is switched to the current source mode, the first switch 14 is controlled to close, and finally the bypass switch 23 is closed.

[0085] Current source output refers to the power supply output terminal being forced to maintain a constant current (or changing according to a set curve), and its output voltage is determined by the load impedance. When the energy storage system switches to grid-connected mode, the output mode needs to be changed from voltage source to current source. The core purpose is to ensure the safe startup of the system and the stable establishment of grid 200 parameters. In the embodiment of this application, when the energy storage power supply system 100 is connected to the grid, since the grid 200 uses voltage source output, only one voltage source can exist in the same power supply network at any given time; otherwise, a conflict will occur. To cooperate with the grid 200, the energy storage power supply system 100 needs to be adjusted to current source output.

[0086] Please see Figure 1 and Figure 3 In some embodiments, the energy storage converter 16 is communicatively connected to the bypass switch 23 and is configured to control the bypass switch 23 to close when the first switch 14 is closed, and to control the bypass switch 23 to open when the second switch 15 is closed.

[0087] In this way, through the linkage control of the energy storage converter 16 and the bypass switch 23, the automatic matching of the bypass state and the working mode is realized, avoiding the risk of power backflow in the off-grid mode.

[0088] In this embodiment, the off-grid socket 20 also includes a communication module 24. The energy storage converter 16 can communicate with the bypass switch 23 through the communication module 24. For example, the energy storage converter 16 can establish a real-time communication link with the bypass switch 23 through RS485 / CAN bus or Bluetooth connection.

[0089] Specifically, when the first switch 14 is closed (grid-connected mode), the energy storage converter 16 sends a closing command to the bypass switch 23. At this time, the bypass switch 23 is turned on to make the power grid 200-load path unobstructed. When the second switch 15 is closed (off-grid mode), the energy storage converter 16 sends a disconnect command, the bypass switch 23 is turned off, and the connection point between the power grid 200 and the load is physically isolated.

[0090] Please see Figure 1 and Figure 3 In some embodiments, the energy storage power supply system 100 includes a CT switch and a photovoltaic power generation system 40. The photovoltaic power generation system 40 is connected to the main distribution box 300, which is connected to the power grid 200 via the CT switch. The energy storage converter 16 is communicatively connected to the bypass switch 23 and is configured to control the CT switch and the bypass switch 23 to close when the first switch 14 is closed, and to control the CT switch to open and the bypass switch 23 to close when the second switch 15 is closed.

[0091] In this way, by synchronously controlling the CT switch and bypass switch 23 to close when connected to the grid and disconnecting the CT switch and keeping the bypass closed when disconnected from the grid, the photovoltaic power generation system 40 and the power grid 200 are intelligently isolated, which is conducive to ensuring the system safety and compliance when operating off-grid.

[0092] In some embodiments, the energy storage power supply system 100 may also include a photovoltaic power generation system 40, which is connected to the input terminal of the main distribution box 300. The main distribution box 300 is connected in series with the power grid 200 via a current transformer (CT) switch. The energy storage converter 16 is used to simultaneously control the bypass switch 23 and the CT switch.

[0093] Specifically, when the energy storage power supply system 100 is in grid-connected mode (first switch 14 is closed), the energy storage converter 16 simultaneously closes the bypass switch 23 and the CT switch, allowing the power from the photovoltaic power generation system 40 to be injected into the grid 200 or local loads. When the energy storage power supply system 100 is in off-grid mode (second switch 15 is closed), the energy storage converter 16 first disconnects the CT switch to physically disconnect the grid, and then closes the bypass switch 23, allowing the photovoltaic power generation system 40 to continue supplying power to the sub-distribution box 400 through the main distribution box 300—bypass switch 23—off-grid socket 22. Together with the integrated energy storage unit 10, it can supply power to the load of the sub-distribution box, thereby improving the power supply capacity in the off-grid state. Specifically, it can increase the power supply quantity and power in the off-grid state, thus providing users with a better backup power experience during power outages and grid disconnection.

[0094] Please see Figure 6 In some embodiments, to accomplish the above operations, the control method further includes:

[0095] Step 008: Obtain the status of the first switch and the second switch;

[0096] Step 009: With the first switch closed, control the CT switch and bypass switch to close;

[0097] Step 010: With the second switch closed, control the CT switch to open and the bypass switch to close.

[0098] In this way, by synchronously controlling the CT switch and the bypass switch 23 according to the switch status, the automatic coordination of the photovoltaic system's connection status with the grid 200 during mode switching is realized, ensuring system compliance and safety.

[0099] Specifically, for example, when the first switch 14 is detected to be closed (grid-connected mode), the energy storage converter 16 sends a closing command to the CT switch controller, and the CT switch closes to connect the photovoltaic power generation system 40 to the grid 200; at the same time, the bypass switch 23 is closed to establish a local power supply path. When the second switch 15 is closed (off-grid mode), a tripping command is first sent to the CT switch, and after the CT switch status feedback is in the open position, the bypass switch 23 is closed to form an off-grid microgrid 200.

[0100] Please see Figure 1 and Figure 3 In some embodiments, the energy storage power supply system 100 includes a CT switch and a photovoltaic power generation system 40. The photovoltaic power generation system 40 is connected to the main distribution box 300. The main distribution box 300 is connected to the power grid 200 through the CT switch. The bypass switch 23 and the CT switch are communicatively connected to a remote user terminal. The bypass switch 23 and the CT switch are configured to be controlled by the remote user terminal to open the CT switch and close the bypass switch 23 when the second switch 15 is closed.

[0101] In this way, the CT switch can be directly controlled to open and the bypass switch 23 to close via a remote user terminal, which facilitates manual intervention to manage the grid connection status when the energy storage unit 10 is working off-grid, thereby enhancing the flexibility of system operation and emergency response capabilities.

[0102] In some embodiments, the remote control dimension of the energy storage power supply system 100 may also be extended to enhance operational flexibility.

[0103] Specifically, for example, the bypass switch 23 and the CT switch can be equipped with a Wi-Fi / 4G communication module 24 to establish a connection with the remote user terminal. When the energy storage converter 16 switches to off-grid mode (the second switch 15 is closed), it automatically sends a status alarm to the user terminal. The user can manually trigger the "off-grid operation command," and the remote user terminal can send a trip command to the CT switch and a closing command to the bypass switch 23 via the MQTT protocol.

[0104] In some embodiments, the instruction transmission delay should be less than 500ms, and the execution status should be fed back to the terminal interface in real time.

[0105] In some embodiments, remote user terminals include, but are not limited to, mobile phones, computers, apps, cloud platforms, etc.

[0106] Please see Figure 1 and Figure 3In some embodiments, the energy storage converter 16 is communicatively connected to the bypass switch 23 and is configured to detect the current and voltage signals of the power supply terminal 13 and control the bypass switch 23 to close in the event of abnormal current and voltage signals.

[0107] In this way, by monitoring abnormal signals at the power supply terminal 13 and forcibly closing the bypass switch 23 through the energy storage converter 16, rapid power supply switching in case of fault is achieved, which is beneficial to the power supply safety of the core load and equipment protection.

[0108] In some embodiments, the energy storage converter 16 is communicatively connected to the bypass switch 23 to provide abnormal protection for the power supply terminal 13.

[0109] Specifically, for example, the energy storage converter 16 acquires the voltage and current waveforms of the power supply terminal 13 in real time at a sampling frequency of 20kHz. It analyzes the harmonic distortion rate using FFT (e.g., THD > 8% indicates an anomaly), calculates the effective value using RMS (e.g., overvoltage 130% / undervoltage 70% threshold), and detects the three-phase imbalance using dq transformation (e.g., > 10% triggers protection). When any parameter exceeds the limit, the converter immediately sends a forced closing command to the bypass switch 23. At this time, regardless of the system mode, the bypass switch 23 will be open, allowing the grid power 200 to directly take over the load power supply.

[0110] Furthermore, in some embodiments, if the abnormality of the power supply terminal 13 is a transient fault (e.g., duration < 200ms), the bypass will be automatically released after the parameters return to normal; if it is a permanent fault, the bypass state will be maintained and a fault code will be reported.

[0111] In some embodiments, the integrated energy storage unit 10 includes a photovoltaic module 17 and a battery pack 19, which are connected to a power supply terminal 13 via a control circuit 18. The energy storage converter 16 is configured to control the control circuit 18 to supply power to the photovoltaic module 17 and / or battery pack 19 through the power supply terminal 13 at a constant current when the first switch 14 is closed, and to control the control circuit 18 to supply power to the photovoltaic module 17 and / or battery pack 19 through the power supply terminal 13 at a constant voltage when the second switch 15 is closed.

[0112] In this way, by controlling the photovoltaic / battery pack 19 to supply power in constant current (grid-connected) or constant voltage (off-grid) modes, dynamic matching of energy output characteristics and load demand is achieved, which is conducive to improving energy utilization efficiency and extending equipment life.

[0113] Specifically, in some embodiments, when the energy storage power supply system 100 is in grid-connected mode, the energy storage converter 16 controls the DC / DC circuit 181 and the DC / AC circuit 182 to operate in constant current mode, and the current setpoint is adjusted in real time according to the grid 200 dispatch command or electricity price strategy, so that the photovoltaic / cell output power accurately matches the demand; when the energy storage power supply system 100 is in off-grid mode, the energy storage converter 16 controls the DC / DC circuit 181 and the DC / AC circuit 182 to switch to constant voltage mode, and the load sharing of multiple sources in parallel is achieved through droop control.

[0114] Please see Figure 1 and Figure 3 In some embodiments, the energy storage unit 10 also includes a main switch 110, and the power supply terminal 13 is connected to the first switch 14 and the second switch 15 through the main switch 110.

[0115] In this way, the power input of the first / second switch 15 is managed uniformly through the main switch 110, which facilitates the overall power-off maintenance of the energy storage unit 10 and improves the safety and convenience of system maintenance.

[0116] In some embodiments, the open position of the main switch 110 may also be equipped with a mechanical interlock device to ensure that the first and second switches 15 cannot be closed during maintenance. The switch status is fed back to the converter in real time through auxiliary contacts, forming a "closing permission" logic AND gate: the first / second switches 15 can only be operated when the main switch 110 is closed and there is no fault.

[0117] Please see Figure 7 In some embodiments, the control method further includes:

[0118] Step 011: When the energy storage power supply system is in grid-connected state, obtain the total voltage and total current at the main switch;

[0119] Step 012: When the total voltage or total current is abnormal, control the bypass switch to close; otherwise, obtain the off-grid voltage of the second switch.

[0120] Step 013: When the off-grid voltage is abnormal, control the bypass switch to close; otherwise, control the bypass switch to open.

[0121] In this way, by detecting abnormal voltage and current of the main switch 110 and off-grid voltage, intelligent interlocking control of the bypass switch 23 is achieved, which is beneficial to maintaining the power supply to the core load when equipment fails.

[0122] Specifically, for example, in grid-connected mode, the energy storage converter 16 samples the three-phase voltage and current at the main switch 110 at a frequency of 1kHz to calculate the actual power, reactive power, and frequency deviation parameters. If any parameter exceeds the tolerance, the bypass switch 23 is immediately closed to transfer the load to the grid 200 for power supply. If the parameters are normal, the voltage harmonic distortion rate at the off-grid port 12 is detected, and if abnormal, the bypass switch 23 is closed to establish a backup path.

[0123] In some embodiments, the first pluggable connector 50 and the second pluggable connector 60 are fixedly connected to the off-grid socket 20 by a snap-fit ​​or threaded connection.

[0124] In this way, by using snap-fit ​​or threaded fasteners to secure the connectors, the grid-connected socket 20 and the integrated energy storage unit 10 can be quickly assembled and disassembled while complying with relevant regulations, facilitating equipment relocation, replacement, and on-site deployment.

[0125] Specifically, for example, the first pluggable connector 50 and the second pluggable connector 60 can be provided with a rotating latching mechanism with the socket. That is, after the first pluggable connector 50 and / or the second pluggable connector 60 are inserted into the socket, rotating clockwise will press the contacts through the cam, and rotating in the opposite direction will automatically pop them open.

[0126] In some embodiments, the grid-connected socket 21 and the off-grid socket 22 are respectively connected to the main distribution box 300 and the sub-distribution box 400 via independent lines.

[0127] Thus, by designing independent circuits for the grid-connected socket 21 and the off-grid socket 22, mutual interference between the grid-connected and off-grid circuits is avoided, which helps to ensure the stability and reliability of dual-path power supply.

[0128] Specifically, in this embodiment, the independent lines connecting the grid-connected socket 21 and the off-grid socket 22 to the main distribution box 300 and the sub-distribution box 400 adopt a fully independent channel architecture. For example, the wiring from the grid-connected socket 21 to the main distribution box 300 is 6mm thick. 2 Flame-retardant copper cable (gray sheath) is routed separately through metal conduit; the same specification cable (yellow sheath) is used from off-grid outlet 22 to sub-distribution box 400, with a minimum spacing of 300mm between them. The cable shielding layer is grounded at both ends to reduce electromagnetic interference. Sub-distribution box 400 is equipped with independent dual busbars: the main busbar connects to the cable at grid-connected outlet 21, and the spare busbar connects to the cable at off-grid outlet 22, with the two connected via a mechanical interlock switch. This design ensures that even in extreme situations such as cable damage and short circuits, the grid-connected and off-grid circuits remain completely isolated, eliminating the risk of fault propagation.

[0129] Please see Figure 1 and Figure 4 In another embodiment of this application, a grid-connected socket 20 is also provided, the structure of which has been described in detail in the energy storage power supply system 100, and will not be repeated here.

[0130] This application also provides a computer-readable storage medium for storing a computer program. This computer-readable storage medium can be applied to a computer device, and the computer program causes the computer device to execute the corresponding processes in the control method of the energy storage power supply system in the embodiments of this application; for the sake of brevity, these will not be elaborated further here.

[0131] This application also provides a computer program product including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the corresponding flow in the control method of the energy storage power supply system in the embodiments of this application. For simplicity, further details are omitted here.

[0132] This application also provides a computer program comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the corresponding flow in the control method of the energy storage power supply system of this application. For brevity, further details are omitted here.

[0133] It should be understood that the processor in this application may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method embodiments can be completed by integrated logic circuits in the processor's hardware or by instructions in software form. The processor described above can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor reads information from the memory and, in conjunction with its hardware, completes the steps of the above method.

[0134] It is understood that the memory in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory used in the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0135] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0136] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0137] In this application embodiment, the terms "module" or "unit" refer to a computer program or part of a computer program that has a predetermined function and works with other related parts to achieve a predetermined goal, and can be implemented wholly or partially using software, hardware (such as processing circuitry or memory), or a combination thereof. Similarly, a processor (or multiple processors or memory) can be used to implement one or more modules or units. Furthermore, each module or unit can be part of an overall module or unit that includes the functionality of that module or unit.

[0138] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0139] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0140] In addition, the functional units in this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0141] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer or a server) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0142] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are 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.

[0143] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0144] 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, the scope of which is defined by the claims and their equivalents.

Claims

1. An energy storage power supply system, characterized by, include: Integrated energy storage unit, which includes grid-connected port and off-grid port; Off-grid socket, wherein the off-grid socket is formed as follows: A grid-connected socket is connected to the grid-connected port of the integrated energy storage unit via a first pluggable connector. The grid-connected socket is configured to be electrically connected to the main distribution box on the grid side. Off-grid port, which is connected to the off-grid port of the energy storage unit via a second pluggable connector, and the off-grid port is configured to be electrically connected to the sub-distribution box on the core load side; A bypass switch, wherein the bypass switch is connected between the grid-connected socket and the off-grid socket; The bypass switch is configured to close when the energy storage unit is connected to the grid, and the power supplied by the grid is supplied to the sub-distribution box through the main distribution box and the bypass switch, and / or the power supplied by the energy storage unit is supplied to the sub-distribution box through the grid connection port, the first pluggable connector, the grid connection plug, the bypass switch and the off-grid socket; The bypass switch is configured to disconnect when a grid power outage is detected and the energy storage unit switches to off-grid operation. The power provided by the energy storage unit supplies power to the sub-distribution box through the off-grid port, the second pluggable connector and the off-grid plug, and maintains the continuity of power supply to the sub-distribution box during the switching process. The first and second pluggable connectors are configured to allow unplugging from the grid-connected socket to detach the energy storage unit from the grid-connected socket.

2. The energy storage power supply system of claim 1, wherein, The integrated energy storage unit also includes a power supply terminal, a first switch, a second switch, and an energy storage converter. The power supply terminal is connected to the grid-connected port via the first switch, and the power supply terminal is connected to the off-grid port via the second switch. The energy storage converter is configured to detect the grid voltage of the grid-connected port, and when the grid voltage is greater than a preset voltage, control the first switch to close and the second switch to open to connect the power supply terminal to the grid-connected port. When the grid voltage is less than or equal to the preset voltage, control the second switch to close and the first switch to open to connect the power supply terminal to the off-grid port.

3. The energy storage power supply system of claim 2, wherein, The energy storage converter is communicatively connected to the bypass switch and is configured to control the bypass switch to close when the first switch is closed, and to control the bypass switch to open when the second switch is closed.

4. The energy storage power supply system of claim 2, wherein, The energy storage power supply system includes a current transformer (CT) switch and a photovoltaic power generation system. The photovoltaic power generation system is connected to the main distribution box, which is connected to the power grid via the CT switch. The energy storage converter is communicatively connected to the bypass switch and is configured to control the CT switch and the bypass switch to close when the first switch is closed, and to control the CT switch to open and the bypass switch to close when the second switch is closed.

5. The energy storage power supply system of claim 2, wherein, The energy storage power supply system includes a current transformer (CT) switch and a photovoltaic power generation system. The photovoltaic power generation system is connected to the main distribution box, and the main distribution box is connected to the power grid through the CT switch. The bypass switch and the CT switch are communicatively connected to a remote user terminal. The bypass switch and the CT switch are configured such that when the second switch is closed, the remote user terminal controls the CT switch to open and the bypass switch to close.

6. The energy storage power supply system of claim 2, wherein, The energy storage converter is communicatively connected to the bypass switch and is configured to detect the current and voltage signals at the power supply terminal, and control the bypass switch to close when the current and voltage signals are abnormal.

7. The energy storage power supply system of claim 2, wherein, The integrated energy storage unit includes photovoltaic modules and a battery pack. The photovoltaic modules and the battery pack are connected to the power supply terminal through a control circuit. The energy storage converter is configured to control the control circuit to supply power to the photovoltaic modules and / or the battery pack through the power supply terminal at a constant current when the first switch is closed, and to control the control circuit to supply power to the photovoltaic modules and / or the battery pack through the power supply terminal at a constant voltage when the second switch is closed.

8. The energy storage power supply system of claim 2, wherein, The energy storage unit also includes a main switch, and the power supply is connected to the first switch and the second switch through the main switch.

9. The energy storage power supply system of claim 1, wherein, The first pluggable connector and the second pluggable connector are fixedly connected to the off-grid socket by means of snap-fit ​​or threaded connection.

10. The energy storage power supply system of claim 1, wherein, The grid-connected socket and the off-grid socket are respectively connected to the main distribution box and the sub-distribution box via independent lines.

11. A parallel and off-grid socket for an energy storage power supply system, the energy storage power supply system comprising an energy storage all-in-one machine, the energy storage all-in-one machine comprising a grid-connected port and an off-grid port, characterized in that, The grid-connected / off-grid socket includes: A grid-connected socket is connected to the grid-connected port of the integrated energy storage unit via a first pluggable connector. The grid-connected socket is configured to be electrically connected to the main distribution box on the grid side. Off-grid port, which is connected to the off-grid port of the energy storage unit via a second pluggable connector, and the off-grid port is configured to be electrically connected to the sub-distribution box on the core load side; A bypass switch, wherein the bypass switch is connected between the grid-connected socket and the off-grid socket; The bypass switch is configured to close when the energy storage unit is connected to the grid, and the power supplied by the grid is supplied to the sub-distribution box through the main distribution box and the bypass switch, and / or the power supplied by the energy storage unit is supplied to the sub-distribution box through the grid connection port, the first pluggable connector, the grid connection plug, the bypass switch and the off-grid socket; The bypass switch is configured to disconnect when a grid power outage is detected and the energy storage unit switches to off-grid operation. The power provided by the energy storage unit supplies power to the sub-distribution box through the off-grid port, the second pluggable connector and the off-grid plug, and maintains the continuity of power supply to the sub-distribution box during the switching process. The first and second pluggable connectors are configured to allow unplugging from the grid-connected socket to detach the energy storage unit from the grid-connected socket.

Images