Power supply system, parallel connection outlet, and control method for the power supply system

Abstract

This invention provides a power supply system, a parallel connection outlet, and a control method for the power supply system that facilitate connection to a distribution board, reduce installation difficulty, and lower costs. [Solution] In the power supply system (100), the integrated energy storage unit (10) is connected to the grid connection outlet (21) and the off-grid outlet (22) of the parallel connection outlet (20), the parallel connection outlet (20) is connected to the gasoline generator (400), and a bypass switch (24) is connected between the grid connection outlet (21) and the off-grid outlet (22). The power supply system is controlled to disconnect the bypass switch (24) when it is in an off-grid state and the load requirement is met, otherwise it starts the gasoline generator (400) and closes the bypass switch (24).

Description

Technical Field

[0001] This application relates to the technical field of power supply equipment, and more specifically, to a power supply system, a parallel connection socket, and a control method for a power supply system.

Background Art

[0002] To cope with power shortages caused by power outages, in households, users usually adopt both a power storage device and a gasoline generator as backup power sources for the main load. However, the inventor realizes that the power storage device is connected to the power grid through a system connection port and a distribution board, and requires wiring connection between the power storage device and the distribution board by a professional electrician. The gasoline generator needs to be connected to the distribution board through an automatic transfer switch (ATS), and similarly requires wiring connection between the automatic transfer switch and the distribution board by a professional electrician. Both of them rely on complex distribution board wiring work by professional electricians, not only resulting in high installation costs but also congesting the wiring of the distribution board. In addition, since the power storage device and the gasoline generator operate independently of each other, although the power storage device can seamlessly take over power supply during a power outage of the power grid, when the stored power of the power storage device is exhausted, the user needs to manually switch to the gasoline generator, and it takes about 10 seconds to start the gasoline generator. Therefore, it is inevitable that the load will experience a power outage during the switching process, which has a great impact on loads sensitive to power outages (such as computers). For this reason, related means have disadvantages such as being complex and expensive to install, the load experiencing a power outage during the switching process and requiring manual intervention, which significantly affects the user experience.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Embodiments of this application provide a power supply system, a parallel connection socket, and a control method for a power supply system to solve at least one of the above-mentioned technical problems.

Means for Solving the Problems

[0004] According to the power supply system of the present embodiment, the power supply system is used as a backup power source for household loads, and the power supply system is An integrated energy storage system including grid connection ports and off-grid ports, It includes a grid connection outlet, an off-grid outlet, a generator outlet, and a parallel connection outlet including a bypass switch, The grid connection port is connected to the grid connection socket via a first plug-in connector, and the grid connection socket is connected to the main distribution board on the power grid side. The off-grid port is connected to the off-grid socket via a second plug-in connector. The generator outlet is used to connect to the power supply port of a gasoline generator via a third plug-in connector, and both the off-grid outlet and the generator outlet are connected to the load-side sub-distribution panel. The bypass switch is connected between the grid connection outlet and the off-grid outlet. The power supply system is configured as follows: If the integrated energy storage unit is in an off-grid state and the power supplied to its off-grid port meets the load requirements of the sub-distribution panel, the bypass switch is disconnected. If the integrated energy storage unit is in an off-grid state and the power supplied to its off-grid port does not meet the load requirements of the sub-distribution board, the system controls the gasoline generator to start up. After the gasoline generator meets the starting conditions, the integrated energy storage unit switches from an off-grid state to a grid-connected state and closes the bypass switch. After the integrated energy storage unit switches to a grid-connected state, the system controls it to supply power to the load of the sub-distribution board via both the grid-connected port and the power supply port of the gasoline generator. [Effects of the Invention]

[0005] In the power supply system according to this invention, the parallel connection outlets can be pre-assembled and connected to the distribution board, making it easy to connect them to the distribution board when adding an integrated energy storage unit and a gasoline generator, thereby reducing the difficulty of installation and lowering costs. Furthermore, the parallel connection outlets enable automatic power switching, and finally, since both the integrated energy storage unit and the gasoline generator are connected to the distribution board via the parallel connection outlets, it is possible to make the wiring of the distribution board more orderly.

[0006] Additional aspects and advantages of the embodiments of the present application are partially shown in the following description, partially become apparent from that description, or are understood through the implementation of the embodiments of the present application. [Brief explanation of the drawing]

[0007] To more clearly explain the technical solutions of the embodiments of this application, the drawings that need to be used in the embodiments are briefly described below. It is clear that the drawings described below are only a few embodiments of this application, and those skilled in the art can obtain further drawings based on these without any creative work. [Figure 1] This is a schematic circuit diagram of a power supply system according to an embodiment of the present invention. [Figure 2] A schematic diagram of a power supply system according to an embodiment of the present invention. [Figure 3] A schematic circuit diagram of an integrated energy storage unit for a power supply system according to an embodiment of the present invention. [Figure 4] This is a schematic circuit diagram of a parallel connection outlet for a power supply system according to an embodiment of the present invention. [Figure 5] This is a flowchart of the power supply method according to the embodiment of the present invention. [Modes for carrying out the invention]

[0008] The embodiments of this application will be described in detail below. Examples relating to the embodiments are shown in the drawings, and the same or similar reference numerals consistently indicate the same or similar elements or elements having the same or similar function. The embodiments described below with reference to the drawings are illustrative and intended to illustrate the present application, and should not be construed as limiting the present application.

[0009] In the description of this application, it is important to understand that the directions or positional relationships indicated by terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "perpendicular," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise" are based on the directions or positional relationships shown in the drawings and are intended for ease of explanation and simplification of the description. They do not indicate or imply that the device or element being referred to has a specific direction or must be configured and operate in a specific direction, and therefore cannot be understood as a limitation of this application. In the description of this application, unless otherwise clearly and specifically limited, the concept of "multiple" refers to two or more.

[0010] In this description, terms such as “attachment,” “connection,” and “connection” should be understood broadly unless specifically defined and limited, for example, that connections may be fixed, detachably connected, or integrally connected; mechanically connected or electrically connected; directly connected or indirectly connected via an intermediate medium, or internal communication between two elements or an interaction relationship between two elements. A person skilled in the art will be able to understand the specific meaning of the aforementioned technical terms in this application, depending on the specific circumstances.

[0011] In this application, unless otherwise specified and limited, the description of a first feature as "above" or "below" a second feature may include direct contact between the first and second features, or it may include contact between them by other features, but not direct contact between the first and second features. Furthermore, the description of a first feature as "above," "above," and "on the top surface" of a second feature may mean that the first feature is just above and diagonally above the second feature, or it simply indicates that the horizontal height of the first feature is higher than that of the second feature. The description of a first feature as "below," "below," and "on the bottom surface" of a second feature may mean that the first feature is just below or diagonally below the second feature, or it simply indicates that the horizontal height of the first feature is lower than that of the second feature.

[0012] The following disclosure provides many different embodiments or examples to realize different structures of the present application. For the sake of simplification of the disclosure, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. The present application may repeat reference numbers and / or reference letters in different embodiments, but such repetition is for the purpose of simplification and clarity and does not in itself indicate relationships between the various embodiments and / or configurations discussed. The present application provides examples of various specific processes and materials, but those skilled in the art may be aware of the application of other processes and / or the use of other materials.

[0013] To cope with power shortages caused by blackouts, households typically employ both a battery storage system and a gasoline generator as backup power sources for their primary loads. However, the inventors are aware that battery storage systems are connected to the power grid via grid connection ports and distribution boards, requiring wiring connections between the battery storage system and the distribution board by a professional electrician. Gasoline generators need to be connected to the distribution board via an Auto Transfer Switch (ATS), similarly requiring wiring connections between the Auto Transfer Switch and the distribution board by a professional electrician. Both rely on complex distribution board wiring work by professional electricians, resulting in high installation costs and congested distribution board wiring. Furthermore, because battery storage systems and gasoline generators operate independently, while the battery storage system can seamlessly take over power supply during a power grid outage, users must manually switch to the gasoline generator when its storage capacity is depleted. Since the gasoline generator takes about 10 seconds to start up, a power outage inevitably occurs during the switching process, significantly impacting power-sensitive loads (such as computers). Therefore, related methods have drawbacks such as being complex and expensive to install, causing power outages during the switching process, and requiring manual intervention, which significantly impacts the user experience.

[0014] Referring to Figures 1 and 2, the power supply system 100 according to this embodiment of the application is used as a backup power source for household loads. The power supply system 100 comprises an integrated energy storage unit 10 and a parallel connection outlet 20. The integrated energy storage unit 10 includes a grid connection port 11 and an off-grid port 12. The parallel connection outlet 20 includes a grid connection outlet 21, an off-grid outlet 22, a generator outlet 23, and a bypass switch 24. The grid connection port 11 is connected to the grid connection outlet 21 via a first plug-in connector 60, and the grid connection outlet is connected to the main distribution board 300 on the power grid 200 side. The off-grid port 12 is connected to the off-grid outlet 22 via a second plug-in connector 70. The generator outlet 23 is connected to the power supply port of a gasoline generator 400 via a third plug-in connector 80. Both the off-grid outlet 22 and the generator outlet 23 are connected to the sub-distribution board on the load side. The power supply system 100 is configured as follows: When the integrated energy storage unit 10 is in an off-grid state and the power supplied to its off-grid port 12 satisfies the load requirements of the sub-distribution board 500, the bypass switch 24 is disconnected; when the integrated energy storage unit 10 is in an off-grid state and the power supplied to its off-grid port 12 does not satisfy the load requirements of the sub-distribution board 500, the gasoline generator 400 is controlled to start; after the gasoline generator 400 satisfies the start conditions, the integrated energy storage unit 10 switches from an off-grid state to a grid-connected state and the closed bypass switch 24 is switched; after the integrated energy storage unit 10 switches to a grid-connected state, the integrated energy storage unit 10 is controlled to supply power to the load of the sub-distribution board 500 via both the grid-connected port 11 and the power supply port of the gasoline generator 400.

[0015] In the power supply system 100 according to the present application, the parallel connection socket 20 can be pre-assembled and connected to the distribution board, facilitating the connection to the distribution board when adding the integrated power storage unit 10 and the gasoline generator 400, reducing the installation difficulty, cutting costs, and enabling the parallel connection socket 20 to achieve automatic power switching. Finally, both the integrated power storage unit 10 and the gasoline generator 400 are connected to the distribution board via the parallel connection socket 20, making it possible to make the wiring of the distribution board more orderly.

[0016] In some embodiments, the gasoline generator may be a diesel generator.

[0017] Specifically, grid-connected means that the power supply system 100 operates by directly connecting to the public power grid 200 (the national or regional power transmission network). When the power of the power supply system 100 cannot meet the load requirements of the household, the power grid 200 replenishes it. When the power meets the household load power requirements and there is surplus power, it is transported to the power grid 200. Off-grid means that the power system 100 operates independently and is not completely connected to the public power grid 200.

[0018] In an embodiment of the present application, the parallel connection socket 20 may be pre-fixed to the wall near the main distribution board 300. The grid-connected socket is permanently connected to the household main distribution board 300 via a buried cable and connected to the power grid 200. The off-grid socket 22 and the generator socket 23 are both connected to the sub-distribution board 500 responsible for the main load via a buried cable.

[0019] In an embodiment of the present application, the integrated power storage unit 10 can be inserted into the grid-connected socket 21 of the parallel connection socket 20 via the first plug-in connector 60, and the off-grid port 12 can be inserted into the off-grid socket 22 of the parallel connection socket 20 via the second plug-in connector 70. The gasoline generator 400 can be inserted into the generator socket 23 of the parallel connection socket 20 via the third plug-in connector 80 mounted on its output end as needed.

[0020] Taking the first plug connector 60 and the system connection insertion port 21 as an example, in one embodiment, the first plug connector 60 and the system connection insertion port 21 adopt a snap-lock structure, and the snap-lock structure is applicable to frequent plugging and unplugging scenarios. For example, an elastic snap can be provided on the outer shell of the first plug connector 60, and an engagement groove can be provided at a position corresponding to the system connection insertion port 21, and the snap is automatically locked after being plugged in.

[0021] In one embodiment, the first plug connector 60 and the system connection insertion port 21 can adopt a screw connection method, and the screw structure is suitable for long-term fixed connection scenarios. For example, an external thread is provided on the outer wall of the first plug connector 60, and an internal thread is provided on the inner wall of the system connection insertion port 21, and fixation is achieved by rotation.

[0022] In one embodiment, the first plug connector 60 and the system connection insertion port 21, the second plug connector 70 and the off-grid insertion port 22, and the third plug connector 80 and the generator insertion port 23 may choose the same fixing method or different fixing methods. Regarding the specific connection method, the user can select a suitable connector type according to the actual requirements, taking into account the installation efficiency and the reliability of operation, and will not be further described here.

[0023] In the embodiment of the present invention, the bypass switch 24 is built into the parallel connection outlet 20, and the grid connection outlet and the off-grid outlet 22 are connected to both ends of its contacts, respectively. If the commercial power supply fails while the power supply system 100 is operating, the integrated energy storage unit 10 switches to an off-grid state and supplies power to the sub-distribution board 500 via the off-grid port 12 and the off-grid outlet 22, and at this time the bypass switch 24 remains in the disconnected state. If the load demand of the sub-distribution board 500 suddenly increases (for example, if a user starts a high-power electric heater and a microwave oven at the same time) and exceeds the output capacity of the integrated energy storage unit 10, the gasoline generator 400 is started. After detecting a stable and required voltage at the generator outlet 23, the integrated energy storage unit 10 is switched from an off-grid state to a grid-connected state, and the bypass switch 24 is controlled to close. In some embodiments, the integrated energy storage unit 10 is switched from an off-grid state to a grid-connected state first, and then the bypass switch is controlled to close, or the integrated energy storage unit 10 is switched from an off-grid state to a grid-connected state at the same time as the bypass switch is controlled to close. After the switchover is complete, the grid-connected port 11 of the integrated energy storage unit 10 is connected to the sub-distribution board 500 via the grid-connected outlet 21 and the closed bypass switch 24, and at the same time, the gasoline generator 400 is also connected to the sub-distribution board 500 via the generator outlet 23, and both together provide sufficient power to the main load of the sub-distribution board 500.

[0024] Referring to Figures 1 to 4, in one embodiment, the power supply system 100 includes a control module, which is connected to a remote client terminal 600, and the control module is configured to control the integrated energy storage unit 10 to switch from an off-grid state to a grid-connected state, or from a grid-connected state to an off-grid state, based on commands transmitted from the remote client terminal 600.

[0025] Thus, although the integrated energy storage unit 10 supplies power in an off-grid state, if the load is excessive and the power demand is excessive, the user can proactively switch to a grid-connected state via the remote client terminal 600 to meet the load demand, and if high power is not required, it is also possible to switch back from the grid-connected state to the off-grid state.

[0026] In one embodiment, the power supply system 100 includes a control module, which comprises a first control module 13 located in the integrated energy storage unit 10 and a second control module 25 located in the parallel connection outlet 20. The first control module 13 and the second control module 25 are each connected to a remote client terminal 600. The first control module 13 is used to control the integrated energy storage unit 10, and the second control module 25 is used to control the parallel connection outlet 20.

[0027] In one embodiment, the control module comprises a first communication module 14 provided in the integrated energy storage unit 10 and a second communication module 26 provided in the parallel connection outlet 20. The first communication module 14 is connected to the first control module 13, and the first control module 13 is connected to the remote client terminal 600 by the first communication module 14. The second communication module 26 is connected to the second control module 25, and the second control module 25 is connected to the remote client terminal 600 by the second communication module 26.

[0028] Specifically, the control module can employ a microcontroller with a built-in wireless communication chip (e.g., Wi-Fi / 4G module) and establish a connection with the user's smartphone app or website via the TCP / IP protocol. When the user sends a "switch to grid-connected state" command via the terminal, the control module parses the command, generates a control signal, and adjusts between grid-connected and off-grid states. For example, if the household load is insufficient to meet the off-grid power supply of the integrated energy storage unit 10, the user can remotely trigger the control module via a remote client terminal 600 to connect to the gasoline generator 400 or the power grid 200, ensuring the continued operation of the load.

[0029] Referring to Figures 1 and 2, in one embodiment, the integrated energy storage unit 10 comprises a power terminal, a first switch 15, a second switch 16, and an energy storage power conditioner 17. The power terminal is connected to a grid connection port 11 via the first switch 15, and the power terminal is connected to an off-grid port 12 via the second switch 16. The power supply system 100 is configured to detect the voltage of the power grid 200 at the grid connection port 11 and the voltage of the fuel generator at the generator inlet 23. If the voltage of the power grid 200 is greater than a first preset voltage, or if the fuel generator If the voltage of the electrical equipment is greater than a second preset voltage, the energy storage power conditioner 17 controls the system to close the first switch 15 and disconnect the second switch 16, switching the integrated energy storage unit 10 to a grid-connected state. If the voltage of the power system 200 is less than or equal to the first preset voltage and the voltage of the fuel generator is less than or equal to the second preset voltage, the energy storage power conditioner 17 controls the system to close the second switch 16 and disconnect the first switch 15, switching the integrated energy storage unit 10 to an off-grid state.

[0030] In this way, when the integrated energy storage unit 10 is connected to the distribution board and the power grid 200 is supplying power normally, the power source terminal supplies power to household loads via the grid connection port 11, the integrated energy storage unit 10 realized in the distribution board, and the power grid 200. If the integrated energy storage unit 10 has met the power supply requirements for household loads and there is surplus power, it is transported to the power grid 200. In the event of a power outage or an abnormality in the power supply of the power grid 200, the power source terminal supplies power to household loads via the off-grid port 12 and the distribution board, not only making maximum use of the integrated energy storage unit 10 but also realizing uninterruptible power supply to the home.

[0031] Specifically, in one embodiment, the integrated energy storage unit 10 includes a power terminal, a first switch 15, a second switch 16, and an energy storage power conditioner 17. The energy storage power conditioner 17 (Power Conversion System, PCS) is one of the core components of the integrated energy storage unit 10 and is responsible for the important task of bidirectional energy conversion and control. Its main role is to provide a highly efficient, flexible, and safe "bridge" between the battery (DC power) and the power grid 200 or load (AC power), and to manage power charging and discharging and switch operating modes. In the embodiment of the present invention, the energy storage power conditioner 17 controls the integrated energy storage unit 10 by a first control module 13, can communicate with a second communication module 26 by a first communication module 14, and controls the parallel connection outlet 20 by a second control module 25.

[0032] In one embodiment, the power supply terminal functions as a total energy output port, splitting the current into two paths: one connected to the grid connection port 11 via a first switch 15, and the other connected to the off-grid port 12 via a second switch 16. The energy storage power conditioner 17 monitors the voltage of the power grid 200 at the grid connection port 11 (e.g., 230V AC) and the fuel generator voltage at the generator inlet 23 (e.g., 230V AC output from a gasoline generator 400) in real time via a voltage sensor, and compares the voltage values ​​to a first preset voltage (e.g., 207V) and a second preset voltage (e.g., 210V). If the voltage of the power grid 200 is greater than 207V, or the fuel generator voltage is greater than 210V, the energy storage power conditioner 17 controls the system to close the first switch 15 and open the second switch 16, switching the integrated energy storage unit 10 to a grid-connected state and closing the bypass switch 24, so that the power grid 200 or the gasoline generator 400 can supply power to the load together with the integrated energy storage unit 10 via the grid-connected port 11. Conversely, it switches to an off-grid state, so that the integrated energy storage unit 10 can supply power to the load independently via the off-grid port 12.

[0033] Referring to Figure 1, in one embodiment, the power supply system 100 includes a third switch 30, and the main distribution board 300 is connected to the power grid 200 via the third switch 30, and is configured to control the third switch 30 to turn off when the voltage of the power grid 200 is less than or equal to a first preset voltage.

[0034] Thus, isolating the power system 200 using the third switch 30 when the voltage of the power system 200 drops is advantageous in preventing the low-voltage power system 200 from applying a reverse shock to the power supply system 100.

[0035] Specifically, in one embodiment, the third switch 30 can be an automatic circuit breaker with a voltage detection function. When the energy storage power conditioner 17 detects that the voltage of the power system 200 is less than 207V, the first communication module 14 sends a disconnection signal to the third switch 30, physically disconnecting the connection to the power system 200. In this way, it is possible to avoid reverse power supply to the fault path when the power system 200 is in a low-voltage state, and the power supply system 100 can be protected from the effects of voltage fluctuations. For example, if the voltage of the power system 200 drops sharply due to a lightning strike, the third switch 30 is quickly disconnected to prevent damage to the inverter 50 of the energy storage unit 10 from low-voltage current.

[0036] In one embodiment, the power supply system 100 includes a first photovoltaic power generation system 40, which is connected to a main distribution board 300, and the energy storage power conditioner 17 is connected to a bypass switch 24. The system is configured to control the bypass switch 24 to close when the first switch 15 is closed, and to control the bypass switch 24 to close when the second switch 16 is closed and the first photovoltaic power generation system 40 is started.

[0037] In this way, when connected to the grid, the integrated energy storage unit 10, the first solar power generation system 40, and the power grid 200 can all supply power to household loads. If the power output from the integrated energy storage unit 10 and the first solar power generation system 40 does not meet the household load requirements, the power grid will replenish it. If the power output from the integrated energy storage unit 10 and the first solar power generation system 40 meets the household load requirements and there is surplus power, it will be transported to the power grid 200. When off-grid, the integrated energy storage unit 10 will supply power to the main distribution board as a voltage source, providing a steady voltage to enable the first solar power generation system 40 to generate power. In this way, the integrated energy storage unit 10 and the first solar power generation system 40 can all supply power to household loads, and after going off-grid, they can provide more power to meet the household's backup power requirements after a power outage.

[0038] In conventional technology, the first photovoltaic power generation system 40, when power is supplied to the power grid 200, uses the power grid 200 as a voltage source to supply voltage to the first photovoltaic power generation system 40, driving the first photovoltaic power generation system 40 to generate electricity. However, when the power grid 200 experiences a power outage, the power grid 200 is unable to supply voltage, making it impossible to drive the first photovoltaic power generation system 40 to generate electricity. Consequently, the first photovoltaic power generation system stops operating after the power grid 200 experiences a power outage. In the embodiment of the present invention, after a power outage in the power grid 200, the integrated energy storage unit 10 switches from a grid-connected state to an off-grid state, and accordingly switches from a current source operation mode in the grid-connected state to a voltage source operation mode in the off-grid state. This continuously provides a stable voltage to the first photovoltaic power generation system 40, allowing the first photovoltaic power generation system 40 to operate and maintain power generation in conjunction. In this way, the first photovoltaic power generation system 40 can be kept operating and generating power continuously regardless of whether the power grid is energized or in a power outage state, providing the user with a longer backup power extension time and backup power after a power outage.

[0039] In one embodiment, the power supply system 100 includes a first solar power generation system 40, which is connected to the main distribution board 300 by an inverter 50. When the integrated energy storage unit 10 is in a grid-connected state (the first switch 15 is closed), the energy storage power conditioner 17 sends a closing command to the bypass switch 24, opening the bypass path between the main distribution board 300 and the sub-distribution board 500. When the integrated energy storage unit 10 switches to an off-grid state (the second switch 16 is closed) and starts the first solar power generation system 40, the energy storage power conditioner 17 controls the bypass switch 24 to close, and the first solar power generation system 40 supplies power to the sub-distribution board 500 via the main distribution board 300, forming a hybrid power supply mode between the integrated energy storage unit 10 and the first solar power generation system 40, increasing the system time extension capacity and increasing the reserve power supplied to household loads after a power outage.

[0040] Referring to Figure 1, in one embodiment, the power supply system 100 includes a first photovoltaic power generation system 40, which is connected to a main distribution board 300, and the bypass switch 24 is connected to a remote client terminal for communication, and is configured to be controlled and closed by the remote client terminal when the second switch 16 is closed and the first photovoltaic power generation system 40 is started.

[0041] Thus, through remote control, when off-grid, the integrated energy storage unit 10 supplies power to the main distribution board 300 as a voltage source, providing a steady voltage to power the solar power generation system. In this way, both the integrated energy storage unit and the first solar power generation system can supply power to the household load. After going off-grid, the integrated energy storage unit 10 and the first solar power generation system 40 form a hybrid power supply mode, increasing the system's time extension capability and providing greater power to meet the household's backup power requirements after a power outage.

[0042] In one embodiment, a 4G communication module can be built into the bypass switch 24, and the user can send a "close bypass switch 24" command to the bypass switch 24 via a smartphone app. For example, when the energy storage unit 10 is off-grid and the solar power generation system is started, the user can remotely trigger the closing of the bypass switch 24, causing the first solar power generation system 40 to supply power to the sub-distribution board 500 via the main distribution board 300, while simultaneously charging the battery pack 19 of the energy storage unit 10, thus forming a mutually supplemental power supply route between the first solar power generation system 40 and the energy storage unit 10.

[0043] In one embodiment, the energy storage power conditioner 17 is connected to a bypass switch 24 for communication and is configured to detect voltage information at the power supply terminal and to control the bypass switch 24 to close if the voltage information is abnormal.

[0044] In this way, if there is a malfunction in the integrated energy storage unit 10, the main distribution board 300 and the sub-distribution board 500 can be connected via the parallel connection outlet 20.

[0045] In one embodiment, the energy storage power conditioner 17 monitors the power supply terminal output current in real time using a current sensor, and if it detects a sudden change in current (e.g., exceeding 20% ​​of the rated value) or if voltage harmonics exceed a standard (e.g., THD > 5%), it immediately sends a closing command to the bypass switch 24 and controls the integrated energy storage unit to stop outputting. For example, if the output voltage of the integrated energy storage unit 10 becomes unstable due to a failure of the battery pack 19, the integrated energy storage unit stops outputting, and the bypass switch 24 closes after receiving the closing command, directly connecting the main distribution board 300 to the sub-distribution board 500 and supplying power directly from the power grid 200 or gasoline generator 400, thereby avoiding power interruption to the load.

[0046] Referring to Figures 1 and 3, in one embodiment, the parallel connection outlet 20 is equipped with a manual switch 27, and the grid connection outlet is connected to the off-grid outlet 22 via the manual switch 27.

[0047] In this way, by increasing the number of manual switches 27, the bypass switch 24 can be switched if the bypass switch 24 is faulty.

[0048] In one embodiment, the manual switch 27 is a mechanical toggle switch mounted on the surface of the parallel connection outlet 20. If the bypass switch 24 is unable to operate due to an electronic component failure, the user can manually toggle the switch to connect the grid connection outlet to the off-grid outlet 22, thereby establishing a physical connection between the main distribution board 300 and the sub-distribution board 500. For example, in an emergency where system failure needs to be automatically controlled, the manual switch 27 maintains the basic power supply, ensuring the normal operation of basic household loads (e.g., lighting).

[0049] In other embodiments, the manual switch 27 can also be installed disconnected from the parallel connection outlet 20.

[0050] Referring to Figures 1 and 3, in one embodiment, the integrated energy storage unit 10 comprises an MPPT module 18 and a battery pack 19, the MPPT module 18 and the battery pack 19 are connected to the power supply terminal by a control circuit 110, and the energy storage power conditioner 17 controls the control circuit 110 to supply power to the MPPT module 18 and / or battery pack 19 via the power supply terminal with a constant current when the first switch 15 is closed, and controls the control circuit 110 to supply power to the MPPT module 18 and / or battery pack 19 with a constant current when the second switch 16 is closed. pressure It is configured to control the power supply via the power terminal.

[0051] In this way, a power supply mode that dynamically adjusts the MPPT module 18 and the battery pack 19 can be realized.

[0052] Specifically, the control circuit 110 includes a DC / DC circuit 111 and a DC / AC circuit 112, the MPPT module 18 is connected to an externally mounted second photovoltaic system 700, the battery pack 19 is connected to the DC / DC circuit 111, both the MPPT module 18 and the DC / DC circuit 111 are connected to the DC / AC circuit 112, which in turn connects to the first switch 15 and the second switch 16.

[0053] In one embodiment, when the first switch 15 is closed (grid-connected state), the MPPT module 18 generates solar power using the maximum power point tracking method and inputs the amount of energy to the power supply terminal, and the battery pack 19 discharges using a constant current method with a DC / DC power conditioner. When the second switch 16 is closed (off-grid state), the control circuit 110 switches to "constant voltage mode", and the battery pack 19 outputs a constant voltage (e.g., 220V) to ensure the stability of the load voltage.

[0054] Referring to Figure 5, in one embodiment, a control method for the power supply system 100 is further included, wherein the energy storage power conditioner 17 of the power supply system 100 is used to switch the power supply, and the control method is When the integrated energy storage unit is connected to the grid, step 001 is to acquire the power grid voltage, Step 002: If the power system voltage is less than a first preset voltage, the first switch and the bypass switch are disconnected and the second switch is closed. Step 003 involves obtaining the power request from the load side and the remaining charge of the integrated energy storage unit. Step 004 controls the system to start the gasoline generator if the power of the integrated energy storage unit is less than the required power, or if the remaining charge of the integrated energy storage unit is less than a preset value. The procedure includes step 005, which involves closing the first switch and the bypass switch and disconnecting the second switch after the gasoline generator has met the starting conditions.

[0055] In this way, the parallel connection outlet 20 enables connection between the integrated energy storage unit 10 and the gasoline generator 400 and the distribution board, reducing the difficulty of installation, thereby reducing costs and enabling automatic power switching.

[0056] For example, when the integrated energy storage unit 10 is connected to the grid, the energy storage power conditioner 17 collects the voltage of the power grid 200 once every 0.1 seconds using a voltage sensor. If the voltage of the power grid 200 is detected to be less than 207V for three consecutive times (for example, due to a power outage), the first switch 15 and the bypass switch 24 are immediately disconnected, the second switch 16 is closed, and the integrated energy storage unit 10 is switched off-grid to supply power. At this time, the system monitors the power demand on the load side (for example, 5kW) using a current sensor and simultaneously reads the SOC value of the battery pack 19 (for example, 20% remaining charge). If the power request exceeds the rated power of the integrated energy storage unit 10 (e.g., 4kW), or if the SOC is less than 15%, the automatic start module of the gasoline generator 400 (e.g., built-in relay) triggers the ignition of the generator. After the generator's output voltage stabilizes (e.g., 230V ± 5%), the first switch 15 and the bypass switch 24 are closed, and the second switch 16 is opened, allowing the integrated energy storage unit 10 and the gasoline generator 400 to supply power.

[0057] The present invention further provides a computer-readable storage medium used for storing computer programs. The computer-readable storage medium is applicable to a computer device, and the computer program causes the computer device to execute the corresponding flow in the control method of the power supply system in the embodiment of the present invention, which will not be described again here for brevity.

[0058] The present invention further provides a computer program product which includes computer instructions, which are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, the processor executes the computer instructions, and causes the computer device to execute the corresponding flow in the control method of the power supply system in the embodiment of the present invention, which will not be described again here for the sake of brevity.

[0059] The present invention further provides a computer program which includes computer instructions, which are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, the processor executes the computer instructions, and causes the computer device to execute the corresponding flow in the control method of the power supply system in the embodiment of the present invention, which will not be described again here for the sake of brevity.

[0060] It should be understood that the processor of the present application may be an integrated circuit chip and has signal processing capability. In the implementation process, each step of the above method embodiment can be completed by hardware integrated logic circuits or software-form instructions in the processor. The above processor may 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 device, discrete gate or transistor logic device, or discrete hardware component. Each method, step and logic block diagram disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor, or the processor may be any conventional processor, etc. The steps of the combined method disclosed in the embodiments of the present application can be directly implemented to be completed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can reside in a mature storage medium in this field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, or registers. The storage medium resides in memory, and the processor reads the information in memory and combines it with the hardware to complete the steps of the method described above.

[0061] To ensure clarity, the memory in the embodiments of this application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory may 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. Volatile memory may be random access memory (RAM), which is used as an external cache. By a non-restrictive, illustrative description, multiple forms of RAM may be used, such as Static Random Access Memory (Static RAM, abbreviated as "SRAM"), Dynamic Random Access Memory (DRAM, abbreviated as "DRAM"), Synchronous Dynamic Random Access Memory (Synchronous DRAM, abbreviated as "SDRAM"), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, abbreviated as "DDR SDRAM"), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, abbreviated as "ESDRAM"), Synchlink Dynamic Random Access Memory (Synchlink DRAM, abbreviated as "SLDRAM"), and Direct Memory Bus Random Access Memory (Direct Rambus RAM, abbreviated as "DR RAM"). It should be noted that the memory of the systems and methods described herein includes, but is not limited to, these and any other suitable types of memory.

[0062] Those skilled in the art will recognize that each of the exemplary units and algorithmic steps described in the embodiments disclosed herein can be combined to be implemented in electronic hardware, or in a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software will depend on the specific application and design constraints of the proposed technology. Those skilled in the art may implement the functions described in different ways for each specific application, but such implementations are not considered to be beyond the scope of the present invention.

[0063] Those skilled in the art will understand that, for the sake of convenience and brevity of explanation, the specific operating processes of the systems, apparatus, and units described above can be found by referring to the corresponding processes in the embodiments of the above methods, and will not be described again here.

[0064] In embodiments of the present application, the terms “module” or “unit” refer to a computer program or part of a computer program having a planned function, which works together with other relevant parts to achieve a planned objective, and which is achieved in whole or in part by using software, hardware (e.g., processing circuits or memory) or a combination thereof. Similarly, one processor (or more processors or memory) is used to implement one or more modules or units. Each module or unit may be part of an overall module or unit that has the function of that module or unit.

[0065] It should be understood that in some embodiments of this application, the disclosed devices and methods can be implemented in other ways. The above-described device embodiments are merely illustrative, and for example, the division of the units is only logic function division, and there may be other division methods in actual implementation, for example, multiple units or assemblies may be combined, or integrated into another system, or some features may be ignored or not implemented. Also, the couplings, direct couplings, or communication connections between each other that are shown or considered may be indirect couplings or communication connections by some interfaces, devices, or units, and may be electrical, mechanical, or other forms of connections.

[0066] The units described above as separating members may or may not be physically separated, and the members shown as units may or may not be physical units; that is, they may be located in one place or distributed among multiple network units. Depending on the actual needs, some or all of these units can be selected to achieve the objectives of this embodiment.

[0067] Furthermore, each functional unit in each embodiment of the present application may be integrated into a single processing unit, each unit may exist physically independently, or two or more units may be integrated into a single unit.

[0068] The aforementioned functions can be implemented in the form of a software function unit and, when sold or used as an independent product, can be stored on a single computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application, in their essential or prior art-contributing portions, or portions thereof, can be expressed in the form of a software product, the computer software product being stored on a single storage medium, and containing some instructions for a single computer device (such as a personal computer, server, or network device) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage mediums are various media capable of storing program code, such as U disks, mobile hard disks, read-only memory (ROM), random access memory (RAM), disks, or CDs.

[0069] In this specification, the reference terms “several embodiments,” “one embodiment,” “several examples,” “exemplary embodiments,” “examples,” “specific examples,” or “several examples” mean that the specific features, structures, materials, or properties described with reference to such embodiments or examples are included in at least one embodiment or example of the Application. In this specification, the general expressions of the above terms do not necessarily apply to the same embodiments or examples. In addition, the specific features, structures, materials, or properties described may be incorporated in an appropriate manner in any one or more embodiments or examples.

[0070] Furthermore, terms such as "first" and "second" are merely descriptive and cannot be considered to indicate or imply relative importance, or to imply a number that explicitly reveals a technical feature. Therefore, features limited to "first" and "second" may explicitly or implicitly indicate that the embodiment includes one or more such features. In the description of this disclosure, unless otherwise explicitly and specifically limited, the concept of "multiple" refers to at least two, for example, two, three.

[0071] Although embodiments of the present application have been described, these embodiments are illustrative and should not be understood as limiting the present application. Those skilled in the art will know that various changes, modifications, substitutions, and variations are possible within the scope of the present application, and the scope of the present application is limited by the claims and their equivalents.

Claims

1. A power supply system, wherein the power supply system is used as a backup power source for household loads, and the power supply system is An integrated energy storage system including grid connection ports and off-grid ports, It includes a grid connection outlet, an off-grid outlet, a generator outlet, and a parallel connection outlet including a bypass switch, The grid connection port is connected to the grid connection socket via a first plug-in connector, and the grid connection socket is connected to the main distribution board on the power grid side. The off-grid port is connected to the off-grid socket via a second plug-in connector. The generator outlet is used to connect to the power supply port of a gasoline generator via a third plug-in connector, and both the off-grid outlet and the generator outlet are connected to the load-side sub-distribution panel. The bypass switch is connected between the grid connection outlet and the off-grid outlet. The aforementioned power supply system is If the integrated energy storage unit is in an off-grid state and the power supplied to its off-grid port meets the load requirements of the sub-distribution panel, the bypass switch is disconnected. A power supply system configured to control the gasoline generator to start if the integrated energy storage unit is in an off-grid state and the power supplied to its off-grid port does not meet the load requirements of the sub-distribution board, after the gasoline generator has met the start conditions, the integrated energy storage unit switches from an off-grid state to a grid-connected state and closes the bypass switch, and after the integrated energy storage unit has switched to a grid-connected state, it controls the integrated energy storage unit to supply power to the load of the sub-distribution board via both the grid-connected port and the power supply port of the gasoline generator.

2. The power supply system according to claim 1, comprising a control module, the control module being connected to a remote client terminal, the control module being configured to control the integrated energy storage unit to switch from an off-grid state to a grid-connected state, or from a grid-connected state to an off-grid state, based on a command transmitted by the remote client terminal, the control module comprising a first communication module provided in the integrated energy storage unit and a second communication module provided in the parallel connection outlet, and the control module being connected to the remote client terminal of the second communication module by the first communication module.

3. The power supply system according to claim 1, wherein the integrated energy storage unit further comprises a power terminal, a first switch, a second switch, and an energy storage power conditioner, the power terminal is connected to the grid connection port via the first switch, the power terminal is connected to the off-grid port via the second switch, and the power supply system is configured to detect the power grid voltage of the grid connection port and the fuel generator voltage of the generator inlet, and if the power grid voltage is greater than a first preset voltage, or if the fuel generator voltage is greater than a second preset voltage, the power storage power conditioner controls to close the first switch and disconnect the second switch, thereby switching the integrated energy storage unit to a grid-connected state, and if the power grid voltage is less than or equal to a first preset voltage and the fuel generator voltage is less than or equal to a second preset voltage, the power storage power conditioner controls to close the second switch and disconnect the first switch, thereby switching the integrated energy storage unit to an off-grid state.

4. The power supply system according to claim 3, wherein the power supply system comprises a third switch, the main distribution board is connected to the power system via the third switch, and is configured to control the third switch to disconnect when the power system voltage is less than or equal to the first preset voltage.

5. The power supply system according to claim 3, comprising a first solar power generation system, the first solar power generation system being connected to the main distribution board, the energy storage power conditioner being communicated to the bypass switch, and the energy storage power conditioner being configured to control the bypass switch to close when the first switch is closed, and to control the bypass switch to close when the second switch is closed and the first solar power generation system is started, the parallel connection outlet being equipped with a manual switch, and the grid connection outlet being connected to the off-grid outlet via the manual switch.

6. The power supply system according to claim 3, comprising a first solar power generation system, the first solar power generation system being connected to the main distribution board, the bypass switch being connected to a remote client terminal for communication, and configured to be controlled by the remote client terminal to close the second switch and start the first solar power generation system, the parallel connection outlet being equipped with a manual switch, and the grid connection outlet being connected to the off-grid outlet via the manual switch.

7. The power supply system according to claim 3, wherein the energy storage power conditioner is connected to the bypass switch for communication, detects voltage information at the power supply terminal, and is configured to control the bypass switch to close if the voltage information is abnormal, the parallel connection outlet is equipped with a manual switch, and the grid connection outlet is connected to the off-grid outlet via the manual switch.

8. The power supply system according to claim 3, wherein the integrated energy storage unit comprises an MPPT module and a battery pack, the MPPT module and the battery pack are connected to the power terminal by a control circuit, the energy storage power conditioner is configured to control the control circuit to supply power to the MPPT module and / or the battery pack at a constant current through the power terminal when the first switch is closed, and to control the control circuit to supply power to the MPPT module and / or the battery pack at a constant voltage through the power terminal when the second switch is closed, and the power supply system further comprises a second photovoltaic power generation system, the second photovoltaic power generation system is connected to the MPPT module.

9. The power supply system according to claim 1, wherein the first plug-in connector and the second plug-in connector are fixedly connected to the parallel connection outlet by a snap or screw coupling method.

10. A parallel connection outlet is used in a power supply system, the power supply system comprises an integrated energy storage unit, the integrated energy storage unit includes a grid connection port and an off-grid port, the parallel connection outlet includes a grid connection outlet, an off-grid outlet, a generator outlet and a bypass switch, the grid connection port is connected to the grid connection outlet via a first plug-in connector, the grid connection outlet is connected to the main distribution board on the power grid side, the off-grid port is connected to the off-grid outlet via a second plug-in connector, the generator outlet is used to connect to the power supply port of a gasoline generator via a third plug-in connector, both the off-grid outlet and the generator outlet are connected to a sub-distribution board on the load side, and the bypass switch is connected between the grid connection outlet and the off-grid outlet. The parallel connection outlet is configured such that, when the integrated energy storage unit is off-grid and the power supplied to its off-grid port satisfies the load requirements of the sub-distribution board, the bypass switch is disconnected; when the integrated energy storage unit is off-grid and the power supplied to its off-grid port does not satisfy the load requirements of the sub-distribution board, the gasoline generator is started; after the gasoline generator has met the starting conditions, the integrated energy storage unit switches from an off-grid state to a grid-connected state and the bypass switch is closed, so that the integrated energy storage unit supplies power to the load of the sub-distribution board through both the grid-connected port and the power supply port of the gasoline generator.

11. The power supply system comprises a control module, the control module comprises a first control module provided in the integrated energy storage unit and a second control module provided in the parallel connection outlet, the first control module and the second control module are communicated to a remote client terminal, the first control module and the second control module are configured to control the integrated energy storage unit to switch from an off-grid state to a grid-connected state, or from a grid-connected state to an off-grid state, the control module further comprises a first communication module provided in the integrated energy storage unit and a second communication module provided in the parallel connection outlet, the first communication module is connected to the first control module, the first control module is communicated to the remote client terminal by the first communication module, the second communication module is connected to the second control module, and the second control module is communicated to the remote client terminal by the second communication module, the parallel connection outlet according to claim 10.

12. The integrated energy storage unit further comprises a power terminal, a first switch, a second switch, and an energy storage power conditioner, the power terminal is connected to the grid connection port via the first switch, the power terminal is connected to the off-grid port via the second switch, the power supply system detects the power grid voltage of the grid connection port and the fuel generator voltage of the generator inlet, and if the power grid voltage is greater than a first preset voltage, or if the fuel generator voltage is greater than a second preset voltage, the energy storage power conditioner controls the first switch to close and the second switch to close, switching the integrated energy storage unit to a grid connection state, and if the power grid voltage is less than or equal to the first preset voltage and the fuel generator voltage is less than or equal to the second preset voltage, the energy storage power conditioner The parallel connection outlet according to claim 10, wherein the conditioner is configured to control the second switch to close and the first switch to disconnect, thereby switching the integrated energy storage unit to an off-grid state, the power supply system comprises a first solar power generation system, the first solar power generation system is connected to the main distribution board, the energy storage power conditioner is communicated to the bypass switch, and the energy storage power conditioner is configured to control the bypass switch to close when the first switch is closed, and to control the bypass switch to close when the second switch is closed and the first solar power generation system is started, the parallel connection outlet comprises a manual switch, and the grid connection outlet is connected to the off-grid outlet via the manual switch.

13. The integrated energy storage unit further comprises a power terminal, a first switch, a second switch, and an energy storage power conditioner, the power terminal is connected to the grid connection port via the first switch, and the power terminal is connected to the off-grid port via the second switch, the power supply system detects the power grid voltage of the grid connection port and the fuel generator voltage of the generator inlet, and if the power grid voltage is greater than a first preset voltage, or if the fuel generator voltage is greater than a second preset voltage, the energy storage power conditioner controls the first switch to close and the second switch to close, switching the integrated energy storage unit to a grid connection state, and if the power grid voltage is less than or equal to the first preset voltage, the fuel generator voltage The parallel connection outlet according to claim 10, wherein when the voltage is less than or equal to a second preset voltage, the energy storage power conditioner is configured to control the second switch to close and the first switch to disconnect, thereby switching the integrated energy storage unit to an off-grid state, the power supply system comprises a first solar power generation system, the first solar power generation system is connected to the main distribution board, the bypass switch is connected to a remote client terminal for communication and is configured to be controlled and closed by the remote client terminal when the second switch is closed and the first solar power generation system is started, the parallel connection outlet comprises a manual switch, and the grid connection outlet is connected to the off-grid outlet via the manual switch.

14. The integrated energy storage unit further comprises a power terminal, a first switch, a second switch, and an energy storage power conditioner, wherein the power terminal is connected to the grid connection port via the first switch, and the power terminal is connected to the off-grid port via the second switch, and the power supply system detects the power grid voltage of the grid connection port and the fuel generator voltage of the generator inlet, and if the power grid voltage is greater than a first preset voltage, or if the fuel generator voltage is greater than a second preset voltage, the energy storage power conditioner controls the first switch to close and the second switch to close, switching the integrated energy storage unit to a grid-connected state, and the power grid voltage The parallel connection outlet according to claim 10, wherein if the voltage is less than or equal to a first preset voltage and the fuel generator voltage is less than or equal to a second preset voltage, the energy storage power conditioner is configured to close the second switch and disconnect the first switch, thereby switching the energy storage unit to an off-grid state, the energy storage power conditioner is configured to communicate with the bypass switch, detect voltage information at the power supply terminal, and control the bypass switch to close if the voltage information is abnormal, the parallel connection outlet further includes a manual switch, and the grid connection outlet is connected to the off-grid outlet via the manual switch.

15. A control method for a power supply system, used for a power storage power conditioner of the power supply system, the power supply system comprises a power storage unit and a parallel connection outlet, the power storage unit comprises a power terminal, a first switch, a second switch, a power storage power conditioner, a grid connection port and an off-grid port, the parallel connection outlet comprises a grid connection outlet, an off-grid outlet, a generator outlet and a bypass switch, the grid connection port is connected to the grid connection outlet via a first plug-in connector, the grid connection outlet is connected to the main distribution board on the power grid side, The off-grid port is connected to the off-grid outlet via a second plug-in connector, the generator outlet is used to connect to the power supply port of a gasoline generator via a third plug-in connector, both the off-grid outlet and the generator outlet are connected to a sub-distribution panel on the load side, the bypass switch is connected between the grid connection outlet and the off-grid outlet, the power supply terminal is connected to the grid connection port via the first switch, the power supply terminal is connected to the off-grid port via the second switch, and the control method is, If the integrated energy storage unit is connected to the grid, the steps include acquiring the power grid voltage, If the power system voltage is less than a first preset voltage, the first switch and the bypass switch are disconnected and the second switch is closed. The steps include obtaining the power request from the load side and the remaining charge of the integrated energy storage unit, The steps include controlling the system to start the gasoline generator if the power of the integrated energy storage unit is less than the required power, or if the remaining charge of the integrated energy storage unit is less than a preset value, A method for controlling a power supply system, comprising the step of closing the first switch and the bypass switch and disconnecting the second switch after the gasoline generator has met the startup conditions.

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