Energy storage power supply, power supply method and household load standby power system

Abstract

The invention discloses an energy storage power supply, a power supply method and a household load standby power system. The energy storage power supply comprises a shell, a mains supply input socket, an oil engine input socket, a load output socket, a battery pack, an energy storage converter and a change-over switch circuit. The commercial power input socket is used for being connected with commercial power, the fuel engine input socket is used for being connected with a fuel generator, and the load output socket is used for being connected with an alternating-current load. The change-over switch circuit is used for controlling on-off among the commercial power input end, the energy storage converter end, the oil engine input end and the load output end; and the energy storage converter is configured to control the fuel generator to start if the SOC of the battery pack is smaller than a first preset value under the condition that the mains supply voltage is abnormal, and control the change-over switch circuit to communicate the fuel engine input end with the load output end, so that the alternating current output by the fuel generator is supplied to the alternating current load. According to the energy storage power supply, the reliability of coping with long-time power failure and the use convenience and experience of a user are greatly improved.

Description

Technical Field

[0001] This application relates to the field of energy storage equipment technology, and more specifically, to an energy storage power supply, a power supply method, and a household load backup power system. Background Technology

[0002] With the rapid iteration of new energy technologies and the continuous upgrading of outdoor economy and emergency support needs, mobile energy storage power supplies, due to their flexibility, portability, cleanliness, and environmental friendliness, have been widely used in scenarios such as home backup power, outdoor camping power, and emergency power supply. In recent years, users' demand for energy storage power supply capacity has shown a significant growth trend. To adapt to the power supply needs of high-power appliances (such as household refrigerators, air conditioners, and outdoor construction equipment), mobile energy storage power supplies with a capacity of 3 kWh or more have appeared on the market, which can meet the requirements of short- and medium-term emergency power supply and home backup power.

[0003] However, in home emergency power backup, if the mains power fails, appliances usually need to be manually switched to energy storage power, which cannot achieve uninterrupted power supply. Currently, intelligent transfer switches (STS) or automatic transfer switches (ATS) are needed to achieve automatic millisecond-level switching to ensure the continuous operation of critical appliances. However, these devices are expensive due to their integration of high-precision detection and high-speed switching modules, and installation requires modification of the home circuit, making construction complex and difficult.

[0004] On the other hand, many households also keep fuel generators on hand as a supplement, considering the limited range of portable energy storage power supplies and their inability to support prolonged power outages. However, in actual use, fuel generators and portable energy storage power supplies are often connected independently and in parallel, lacking system-level coordination and integration. This separate configuration not only causes equipment redundancy and complex wiring, but also presents problems such as inconvenient management and unintelligent switching. Users often need to operate and maintain two systems separately, making it impossible to achieve automatic energy distribution and optimized scheduling, and they may face risks such as switching delays, power outages, or equipment idling during power outages. Furthermore, the parallel operation without coordination reduces the overall utilization efficiency of backup power, increases operating costs and operational burdens, and limits the evolution of home emergency power supply systems towards automation and intelligence. Summary of the Invention

[0005] This application provides an energy storage power source, a power supply method, and a household load backup power system to solve at least one of the aforementioned technical problems.

[0006] The energy storage power source according to the embodiments of this application includes: shell; The housing includes an AC power input socket, a generator input socket, and a load output socket; the AC power input socket is used to connect to AC power, the generator input socket is used to connect to a fuel generator, and the load output socket is used to connect to a backup power device, which is connected to at least one AC load. The battery pack, energy storage converter, controller, and transfer switch circuit are disposed within the housing; The transfer switch circuit includes an AC power input terminal, an energy storage converter terminal, a generator input terminal, and a load output terminal. The AC power input terminal is connected to the AC power input socket, the energy storage converter terminal is connected to the battery pack via the energy storage converter, the generator input terminal is connected to the generator input socket, and the load output terminal is connected to the load output socket. The transfer switch circuit is used to control the on / off connection between the AC power input terminal, the energy storage converter terminal, the generator input terminal, and the load output terminal. The controller is configured to, in the event of an abnormal mains voltage: If the SOC of the battery pack is greater than or equal to the first preset value, the switching circuit is controlled to connect the energy storage converter terminal and the load output terminal, so that the DC power of the battery pack is converted into AC power by the energy storage converter and then supplied to the AC load. If the SOC of the battery pack is less than the first preset value, the fuel generator is started, and the transfer switch circuit is connected to the generator input terminal and the load output terminal, so that the AC power output by the fuel generator supplies power to the AC load through the generator input socket and the load output socket.

[0007] The energy storage power supply provided in this application integrates a transfer switch circuit within the power supply itself, which is pre-connected to the mains input, energy storage converter, generator input, and load output. During installation, it only requires connection to a mains outlet and the existing household backup power supply; no modifications to household wiring or professional installation are needed, significantly reducing installation costs and lowering the barrier to entry. During operation, the system automatically detects the mains power status and seamlessly switches to battery power in case of an anomaly, ensuring uninterrupted operation of core loads. Furthermore, in the event of a mains power failure and insufficient battery power, the system automatically starts the fuel generator and controls the transfer switch circuit to connect it to the power supply circuit, working in conjunction with the energy storage power supply to power the load. This not only significantly extends the overall system's operating time but also achieves organic integration and automatic scheduling of the two power sources through built-in intelligent management. Compared to traditional solutions where the generator and energy storage power supply are independent and cannot be coordinated, this design achieves truly intelligent collaborative backup power: the system can make dynamic decisions based on battery power, load power, and generator status, automatically switching, paralleling, or providing complementary power to the power sources without any manual intervention. This avoids the problems of equipment redundancy and complex connections, and ensures the continuity and stability of power supply, greatly improving the reliability in dealing with long-term power outages and the user's convenience and experience.

[0008] In some embodiments, the energy storage power supply includes a first pluggable connector and a second pluggable connector. The mains input socket is pluggably connected to the mains socket via the first pluggable connector, and the mains socket is connected to the mains power. The generator input socket is pluggably connected to the fuel generator via the second pluggable connector.

[0009] Thus, by using the first and second pluggable connectors, it is possible to connect to the mains socket and the fuel generator, which facilitates the use and installation of the energy storage power supply.

[0010] In some embodiments, the energy storage converter includes a bidirectional AC / DC converter and a controller connected to the bidirectional AC / DC converter. The switching circuit includes a first relay, a second relay, a third relay, and a fourth relay. The mains input terminal is connected to the bidirectional AC / DC converter in sequence through the second relay and the first relay. The load output terminal is connected to the bidirectional AC / DC converter in sequence through the third relay and the first relay. The generator input terminal is connected to the bidirectional AC / DC converter in sequence through the fourth relay, the third relay, and the first relay. The controller is connected to the first relay, the second relay, the third relay, and the fourth relay and is configured to control the on / off state of the first relay, the second relay, the third relay, and the fourth relay.

[0011] In this way, by setting up a circuit structure with a first relay, a second relay, a third relay, and a fourth relay, automatic switching between mains power, battery pack, and fuel generator is achieved, which helps to ensure the continuity and stability of power supply and avoid power outages.

[0012] In some embodiments, the mains input socket includes a single-phase mains input socket and a split-phase mains input socket. The second relay includes a first moving contact and a first stationary contact. The first moving contact is connected to the first relay and the third relay. The first stationary contact includes a first L1 contact, a first L2 contact, a first neutral contact, and a first ground contact. The first L1 contact is connected to the L1 live wire of the single-phase mains input socket and the L1 live wire of the split-phase mains input socket, respectively. The first L2 contact is connected to the L2 live wire of the split-phase mains input socket, respectively. The first neutral contact is connected to the neutral wire of the single-phase mains input socket and the neutral wire of the split-phase mains input socket, respectively. The first ground contact is connected to the ground wire of the single-phase mains input socket and the ground wire of the split-phase mains input socket, respectively.

[0013] In this way, by specifically defining the wiring methods for single-phase and split-phase input load output sockets, the equipment can be flexibly adapted to single-phase and split-phase mains power, making it easy to install and use in different power environments.

[0014] In some embodiments, the mains socket includes a single-phase mains socket and a split-phase mains socket. The first pluggable connector includes a single-phase input line and a split-phase input line. The single-phase input line includes a single-phase input plug and a single-phase output plug. The single-phase input plug is used for pluggable connection with the single-phase mains socket, and the single-phase output plug is used for pluggable connection with the single-phase mains input socket. The split-phase input line includes a split-phase input plug and a split-phase output plug. The split-phase input plug is used for pluggable connection with the split-phase mains socket, and the split-phase output plug is used for pluggable connection with the split-phase mains input socket.

[0015] In this way, the mains input socket can be connected to the mains via a single-phase input line or a split-phase input line, so that the energy storage power supply can serve as a backup power source for either single-phase or split-phase mains power.

[0016] In some embodiments, the maximum overcurrent value of the single-phase mains input socket and the single-phase input line is 30A, and the maximum overcurrent value of the split-phase mains input socket and the split-phase input line is 50A, 80A, 100, 120A, 150A or 200A.

[0017] Thus, the input lines of the energy storage power supply have strong overcurrent capacity, which helps to adapt to larger loads.

[0018] In some embodiments, the load output socket includes a single-phase output socket and a split-phase output socket, the third relay includes a second moving contact and a second stationary contact, the second stationary contact is connected to the first relay and the second relay respectively, the second moving contact includes a second L1 contact, a second L2 contact, a second neutral contact and a second ground contact, the second L1 contact is connected to the L1 live wire of the single-phase output socket and the L1 live wire of the split-phase output socket respectively, the second L2 contact is connected to the L2 live wire of the split-phase output socket, the second neutral contact is connected to the neutral wire of the single-phase output socket and the neutral wire of the split-phase output socket respectively, and the second ground contact is connected to the ground wire of the single-phase output socket and the ground wire of the split-phase output socket respectively.

[0019] In this way, by specifically defining the wiring methods for single-phase and split-phase output sockets, the equipment can be flexibly adapted to single-phase and split-phase mains power, making it easy to install and use in different power environments.

[0020] In some embodiments, the generator input socket includes a single-phase generator socket and a split-phase generator socket. The fourth relay includes a third moving contact and a third stationary contact. The third stationary contact is connected to the third relay. The third moving contact includes a third L1 contact, a third L2 contact, a third neutral contact, and a third ground contact. The third L1 contact is connected to the live wire of the single-phase generator socket and the L1 live wire of the split-phase generator socket, respectively. The third L2 contact is connected to the L2 live wire of the split-phase generator socket, respectively. The third neutral contact is connected to the neutral wire of the single-phase generator socket and the neutral wire of the split-phase generator socket, respectively. The third ground contact is connected to the ground wire of the single-phase generator socket and the ground wire of the split-phase generator socket, respectively.

[0021] In this way, by specifically defining the wiring methods for single-phase and split-phase generator sockets, the equipment can be flexibly adapted to single-phase and split-phase generators, making it easy to adapt to different types of generators.

[0022] In some embodiments, the controller is further configured to, in the event of an abnormal mains voltage, control the energy storage power supply to a voltage source mode if the fuel generator is not started, and control the fuel generator to a voltage source mode if the fuel generator is started, and control the energy storage power supply to a current source mode if the fuel generator is started.

[0023] Thus, in the event of abnormal mains voltage, the energy storage power supply can be switched to voltage source mode or current source mode according to the operating status of the fuel generator, which helps to stabilize the output voltage and improve the stability and efficiency of power supply.

[0024] In some embodiments, the controller is further configured to, in the event of an abnormal mains voltage, if the fuel generator has been started, acquire the voltage phase, amplitude, and frequency of the fuel generator and control the phase difference between the output voltage of the bidirectional AC / DC converter and the voltage of the fuel generator to not exceed ±2°, the amplitude difference between the output voltage of the bidirectional AC / DC converter and the voltage of the fuel generator to not exceed ±10%, and the frequency difference between the output voltage of the bidirectional AC / DC converter and the voltage of the fuel generator to not exceed ±0.5Hz.

[0025] In this way, by controlling the output voltage of the bidirectional AC / DC converter, voltage tracking of the fuel generator can be achieved, improving the intelligence of the energy storage power supply and helping to reduce users' electricity costs.

[0026] In some embodiments, the controller is further configured to, when the mains voltage is normal, control the transfer switch circuit to connect the mains input terminal to the load output terminal, and / or control the transfer switch circuit to connect the energy storage converter terminal to the load output terminal.

[0027] In this way, the energy storage power supply can work together with the mains power to supply power to the load when there is mains power.

[0028] In some embodiments, the controller is also configured to control the energy storage power source in current source mode when the mains power is available.

[0029] Thus, by switching the energy storage power supply to current source mode, it is beneficial to stabilize the output voltage and improve the stability and efficiency of power supply.

[0030] In some embodiments, the controller is further configured to acquire the voltage phase, amplitude, and frequency of the mains power and control the phase difference between the output voltage of the bidirectional AC / DC converter and the voltage of the mains power to not exceed ±2°, the amplitude difference between the output voltage of the bidirectional AC / DC converter and the voltage of the mains power to not exceed ±10%, and the frequency difference between the output voltage of the bidirectional AC / DC converter and the voltage of the mains power to not exceed ±0.5Hz.

[0031] In this way, by controlling the output voltage of the bidirectional AC / DC converter, mains power tracking can be achieved, improving the intelligence of the energy storage power supply and helping to reduce users' electricity costs.

[0032] In some embodiments, the controller is further configured to close the first and third relays and open the second relay in the event of an abnormal mains voltage or the fulfillment of a first predetermined condition, wherein the first predetermined condition includes the current time being during the peak power consumption period of the mains and the SOC of the battery pack being greater than or equal to a first preset value.

[0033] Thus, during peak hours when the mains power supply is available and the battery pack has sufficient charge, disconnecting the mains power and using only the battery pack for power supply can help reduce electricity costs and improve energy economy.

[0034] In some embodiments, the controller is further configured to, upon meeting a second predetermined condition, control the first relay, the second relay, and the third relay to close, so that the battery pack and the mains power simultaneously supply power to the AC load. The second predetermined condition includes that the current time is during the peak electricity consumption period of the mains power and that the SOC of the battery pack is greater than a second preset value and less than the first preset value.

[0035] In this way, when the mains power is at its peak and the battery pack is low, both mains power and the battery pack can be used to supply power, thus avoiding over-discharge of the battery pack and damage to it.

[0036] In some embodiments, the controller is further configured to, when the current time is during a low-consumption period of the mains power, control the first relay, the second relay, and the third relay to close, so that the mains power simultaneously supplies power to the battery pack and the AC load.

[0037] In this way, during off-peak hours, the AC load can be powered by mains electricity while the battery pack is being charged, thus saving on power supply costs.

[0038] In some embodiments, the energy storage power supply further includes a third pluggable connector, and the load output socket is connected to a backup power device via the third pluggable connector, the backup power device being connected to at least one of the AC loads.

[0039] Thus, the third pluggable connector is used to connect to the backup power device, which facilitates the use and installation of the energy storage power supply.

[0040] In some embodiments, the backup power device includes a manual transfer switch backup power device, and the load output socket is pluggably connected to the power receiving socket of the manual transfer switch backup power device via a third pluggable connector.

[0041] In this way, by adopting a manual transfer switch backup power device and connecting it to the energy storage power source through a third pluggable connector, it is possible to adapt to a low-cost, high-reliability backup power solution. This helps to reduce the purchase and maintenance costs of the entire home backup power system and makes it easier for users to install and wire the system themselves, further lowering the barrier to entry.

[0042] In some embodiments, the maximum overcurrent value of the mains input socket is 30A, 50A, 80A, 100A, 150A, or 200A; the maximum overcurrent value of the transfer switch circuit is 30A, 50A, 80A, 100A, 150A, or 200A; the maximum overcurrent value of the load output socket is 30A, 50A, 80A, 100A, 150A, or 200A; and the maximum overcurrent value of the generator input socket is 30A, 50A, 80A, 100A, 150A, or 200A.

[0043] Thus, the generator input socket of the energy storage power supply has a strong overcurrent capacity, which is conducive to adapting to larger loads.

[0044] In some embodiments, the energy storage power supply includes a socket panel with multiple AC sockets.

[0045] Thus, by placing the AC socket on the socket panel of the housing, users can quickly connect the load, improving the convenience of installation and use.

[0046] In some embodiments, the energy storage power source includes wheels, and the housing is disposed on the wheels.

[0047] Thus, by mounting the outer casing on the wheels, the energy storage power source can be easily moved, which helps to improve its portability.

[0048] The power supply method of the second embodiment of this application is used for the energy storage power supply described in any of the above claims. The energy storage power supply includes: a housing, a mains input socket, a generator input socket, and a load output socket disposed on the housing, a battery pack disposed within the housing, an energy storage converter, and a transfer switch circuit; the mains input socket is used to connect to mains power, the generator input socket is used to connect to a fuel generator, and the load output socket is used to connect to an AC load; the energy storage converter includes a bidirectional AC / DC converter and a converter controller connected thereto; the transfer switch circuit includes a mains input terminal, an energy storage converter terminal, a generator input terminal, and a load output terminal; the mains input terminal is connected to the mains input socket, the energy storage converter terminal is connected to the battery pack through the bidirectional AC / DC converter, the generator input terminal is connected to the generator socket, and the load output terminal is connected to the load output socket; the transfer switch circuit is used to control the on / off connection between the ports of the mains input terminal, the energy storage converter terminal, the generator input terminal, and the load output terminal; the method includes: When the mains power input terminal is abnormal, the SOC of the battery pack is obtained; If the SOC of the battery pack is greater than or equal to a first preset value, the switching circuit is controlled to connect the energy storage converter terminal and the load output terminal, so that the DC power of the battery pack is converted into AC power by the bidirectional AC-DC converter and then supplied to the AC load. If the SOC of the battery pack is less than the first preset value, the fuel generator is started, and the transfer switch circuit is connected to the generator input terminal and the load output terminal, so that the AC power output by the fuel generator supplies power to the AC load through the generator input socket and the load output socket.

[0049] In this way, when the mains power fails and the battery pack is low on power, the internal combustion engine can be started and the generator socket and output socket can be connected to assist the energy storage power supply in supplying power to the load, thereby providing a more stable and longer driving range and improving the user experience.

[0050] In some embodiments, controlling the start of the fuel generator and controlling the transfer switch circuit to connect the generator input terminal and the load output terminal, so that the AC power output by the fuel generator supplies power to the AC load through the generator input socket and the load output socket, including: Obtain the startup status of the fuel generator; When the fuel generator starts successfully, the generator input terminal is connected to the load output terminal. If the fuel generator fails to start, the energy storage converter terminal remains connected to the load output terminal.

[0051] In this way, by acquiring the starting status of the fuel generator in real time and intelligently controlling the connection between the generator socket and the output socket accordingly, a fault-tolerant mechanism is achieved that allows seamless switching to generator power supply when the generator starts successfully, and automatic maintenance of battery pack power supply when starting fails. This greatly improves the reliability and continuity of the power supply system and effectively avoids power outages caused by generator starting failure.

[0052] In some embodiments, the method further includes: Obtain the power supply status of the mains input terminal; When the mains input terminal is de-energized, the generator input terminal remains connected to the load output terminal, or the energy storage converter terminal remains connected to the load output terminal. When there is power at the mains input terminal, the fuel generator is turned off and the generator input terminal is disconnected from the load output terminal. At the same time, the mains input terminal and the energy storage converter terminal are connected to the load output terminal.

[0053] In this way, by monitoring the power supply status of the mains input terminal in real time and automatically controlling the start and stop of the fuel generator and the connection relationship between different power sources and output sockets based on this status, intelligent and fully automatic switching is achieved to maintain the existing reliable power supply when the mains voltage is abnormal and to automatically switch back to mains power supply and shut down the generator when the mains power is restored. This ensures the continuity of power supply to the load and is also conducive to saving fuel.

[0054] The third embodiment of this application of a household load backup power system includes: The energy storage power source described in any of the above items; A fuel generator, wherein the fuel generator is connected to the fuel input socket; and A backup power device is connected to the load output socket and to at least one of the AC loads.

[0055] In some embodiments, the backup power device includes a manual transfer switch backup power device, and the load output socket is connected to the power receiving socket of the manual transfer switch backup power device.

[0056] Thus, by using a manual transfer switch to connect the backup power device to the energy storage power source, it is easy for users to install and wire the device themselves, further reducing the barrier to entry.

[0057] In some embodiments, the manual transfer switch backup power device includes a power supply selection switch, which includes a backup power supply position. The power supply selection switch is configured to default to the backup power supply position so that the energy storage power supply is connected to the backup power device.

[0058] In this way, by connecting the mains power to the backup power device through the energy storage power supply, once the mains power fails, the automatic transfer switch inside the energy storage power supply will immediately act within milliseconds to cut off the mains power path, thereby achieving seamless power supply switching and ensuring the stable operation of the core loads of the household.

[0059] 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

[0060] 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: Figure 1 This is a circuit diagram of a household load backup power system according to an embodiment of this application; Figure 2 This is a schematic diagram of the energy storage power supply according to an embodiment of this application; Figure 3 This is a schematic diagram showing the connection between the energy storage power supply, the mains socket, and the backup power device according to an embodiment of this application; Figure 4 This is a schematic diagram of the connection between the energy storage power supply and the backup power device according to an embodiment of this application; Figure 5 This is a schematic flowchart of the power supply method for the energy storage power source according to the embodiments of this application; Figure 6 This is a circuit diagram of a household load backup power system according to an embodiment of this application; Figure 7 This is a schematic flowchart of the power supply method for the energy storage power source according to the embodiments of this application; Figure 8 This is a schematic flowchart of the power supply method for the energy storage power source according to an embodiment of this application.

[0061] Explanation of reference numerals in the attached diagram: 1000 (Household load backup power system), 100 (energy storage power supply), 10 (casing), 11 (socket panel), 12 (mains input socket), 121 (single-phase mains input socket), 122 (split-phase mains input socket), 13 (load output socket), 131 (single-phase output socket), 132 (split-phase output socket), 14 (generator input socket), 141 (single-phase generator socket), 142 (split-phase generator socket), 15 (AC socket), 20 (battery pack), 30 (energy storage converter), 31 (controller), 32 (bidirectional AC / DC converter), 40 (changeover switch circuit), 41 (mains input terminal), 42 (energy storage converter terminal), 43 (load output terminal), 44 (generator input terminal), 45 (first relay), 46 (second relay), 461 (first moving contact), 462 (first stationary contact), 4621 (first L1 contact), 4622 (first L2 contact), 4623 (first neutral wire contact), 4624 (first ground wire contact), 47 (third relay), 47 (second moving contact). Point 471, second stationary contact 472, second L1 contact 4721, second L2 contact 4722, second neutral contact 4723, second ground contact 4724, fourth relay 48, third moving contact 481, third stationary contact 482, third L1 contact 4821, third L2 contact 4822, third neutral contact 4823, third ground contact 4824, wheel 50, first pluggable connector 60, single-phase input line 61, Single-phase input plug 611, Single-phase output plug 612, Phase split input line 62, Phase split input plug 621, Phase split output plug 622, Second pluggable connector 70, Third pluggable connector 80, Mains socket 200, Single-phase mains socket 210, Phase split mains socket 220, Backup power device 300, Manual transfer switch backup power device 310, Power receiving socket 320, Power selection switch 330, Fuel generator 400. Detailed Implementation

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] Please see Figures 1 to 4 This application provides a household load backup power system 1000, including an energy storage power supply 100, a fuel generator 400, and a backup power device 300. The energy storage power supply 100 includes a housing 10, a mains input socket 12, a generator input socket 14, and a load output socket 13 disposed on the housing 10, a battery pack 20, an energy storage converter 30, and a transfer switch circuit 40 disposed inside the housing 10. The mains input socket 12 is used to connect to the mains power, the generator input socket 14 is used to connect to the fuel generator 400, and the load output socket 13 is used to connect to the backup power device 300. The backup power device 300 is connected to at least one AC load. The transfer switch circuit 40 includes a mains input terminal 41, an energy storage converter terminal 42, a generator input terminal 44, and a load output terminal 43. The mains input terminal 41 is connected to the mains input socket 12, the energy storage converter terminal 42 is connected to the battery pack 20 via the energy storage converter 30, and the generator output terminal 43 is connected to the load output terminal 43. The input terminal 44 is connected to the generator input socket 14, and the load output terminal 43 is connected to the load output socket 13. The transfer switch circuit 40 is used to control the connection and disconnection between the mains input terminal 41, the energy storage converter terminal 42, the generator input terminal 44, and the load output terminal 43. The energy storage converter 30 is configured to, in the event of an abnormal mains voltage: if the SOC of the battery pack 20 is greater than or equal to a first preset value, control the transfer switch circuit 40 to connect the energy storage converter terminal 42 and the load output terminal 43, so that the DC power of the battery pack 20 is inverted into AC power by the energy storage converter 30 and then supplied to the AC load; if the SOC of the battery pack 20 is less than the first preset value, control the generator 400 to start, and control the transfer switch circuit 40 to connect the generator input terminal 44 and the load output terminal 43, so that the AC power output by the generator 400 is supplied to the AC load through the generator input socket 14 and the load output socket 13.

[0067] The energy storage power supply 100 provided in this application integrates a transfer switch circuit 40, which is pre-connected to the mains input terminal 41, the energy storage converter terminal 42, the generator input terminal 44, and the load output terminal 43. During installation, it only requires connection to the mains power and the existing household backup power device 300, eliminating the need for modifications to household wiring or professional installation, significantly reducing installation costs and the barrier to entry. During operation, the system automatically detects the mains power status and seamlessly switches to battery power in case of an anomaly, ensuring uninterrupted operation of core loads. Furthermore, in the event of a mains power failure and insufficient battery power, the system automatically starts the fuel generator 400 and controls the transfer switch circuit 40 to connect it to the power supply circuit, working in conjunction with the energy storage power supply 100 to power the load. This not only significantly extends the overall system runtime but also achieves organic integration and automatic scheduling of the two power sources through built-in intelligent management. Compared to traditional solutions where generators and energy storage power supplies are independent and cannot be coordinated, this design achieves truly intelligent collaborative power backup: the system can make dynamic decisions based on battery power, load power, and generator status, automatically switching, paralleling, or complementing power supplies without human intervention. This avoids the problems of equipment redundancy and complex connections, while ensuring the continuity and stability of power supply, greatly improving the reliability in dealing with long-term power outages and enhancing user convenience and experience.

[0068] Please see Figure 5 This application also provides a power supply method for the aforementioned energy storage power supply 100, the method comprising: Step 01: When there is an abnormality at the mains power input, obtain the SOC of the battery pack; Step 02: If the SOC of the battery pack is greater than or equal to the first preset value, control the conversion switch circuit to connect the energy storage converter terminal and the load output terminal, so that the DC power of the battery pack is converted into AC power by the bidirectional AC-DC converter and then supplied to the AC load. Step 03: If the SOC of the battery pack is less than the first preset value, control the fuel generator to start and control the transfer switch circuit to connect the generator input terminal and the load output terminal, so that the AC power output by the fuel generator can supply power to the AC load through the generator input socket and the load output socket.

[0069] Specifically, in this embodiment, the outer casing 10 of the energy storage power supply 100 is made of engineering plastic, with standardized mounting holes pre-drilled on its surface. The upper layer of the casing 10 has a circuit mounting cavity to accommodate the energy storage converter 30, the transfer switch circuit 40, and related control circuit boards. The lower layer has a battery mounting cavity to house the battery pack 20. The mains input socket 12, the generator input socket 14, and the load output socket 13 are embedded and mounted on the same side panel or different side panels of the casing 10.

[0070] The transfer switch circuit 40 is built into the housing 10 and pre-connected to other components. The controller 31 of the energy storage converter 30 is electrically connected to the control terminal of the transfer switch circuit 40 through the voltage detection module and monitors the mains voltage information of the mains input terminal 41 in real time. The mains voltage information includes, but is not limited to, voltage amplitude information and voltage frequency information.

[0071] In other embodiments, the controller 31 may also be a separately configured control module or a controller 31 configured on other modules.

[0072] In this embodiment, when the mains voltage information is normal, the controller 31 outputs a control signal to drive the switching element inside the transfer switch circuit 40 to activate, connecting the mains input terminal 41 and the load output terminal 43, at which time the mains power supplies AC load. When the mains voltage information is abnormal, the controller 31 responds quickly, driving the transfer switch circuit 40 to switch the energy storage converter terminal 42 to the connected state with the load output terminal 43. The DC power stored in the battery pack 20 is inverted into AC power by the energy storage converter 30 and then supplies AC load. If the remaining power of the battery pack 20 is less than a first preset value, the battery pack 20 is considered to have insufficient power, and the system switches to the generator input terminal 44 to the connected state with the load output terminal 43, supplying AC load by the fuel generator 400. The entire switching process has a short response time, enabling uninterrupted power supply and ensuring stable operation of the core household load. The first preset value can be preset to 80% based on the capacity and performance of the battery pack 20.

[0073] Please see Figure 1 and Figure 6 In some embodiments, the backup power device 300 includes a manual transfer switch backup power device 310, and the load output socket 13 is pluggably connected to the generator inlet box 320 of the manual transfer switch backup power device 310.

[0074] Thus, by using a manual transfer switch backup power device 310 to connect to the energy storage power supply 100, it is easy for users to install and wire the device themselves, further reducing the barrier to entry.

[0075] Specifically, in this embodiment, the backup power device 300 includes a manual transfer switch backup power device 310. The manual transfer switch (MTS) backup power device 310 is a device used in conjunction with a diesel generator, specifically a manual transfer switch that controls whether the power supply is from the mains or the diesel generator. The standard operating mode of the manual transfer switch backup power device 310 is that it is connected to the mains side by default, and the AC load is powered by the mains by default. Only after a mains power failure does the user manually start the generator and operate the switch to switch to the backup power side. The backup power supply is typically a fuel generator 400, thus achieving manual restoration of backup power after a power outage.

[0076] In this embodiment, the power receiving socket 320 is embedded in the surface of the housing 10 of the manual transfer switch backup power device 310. The power receiving socket 320 adopts a standardized socket design that matches the third pluggable connector 80. The load output socket 13 forms a detachable electrical connection with the power receiving socket 320 of the manual transfer switch backup power device 310 through the third pluggable connector 80.

[0077] Please see Figure 6 In some embodiments, the manual transfer switch backup power device 310 includes a power selection switch 330, which includes a backup power supply position. The power selection switch 330 is configured to default to the backup power supply position so that the energy storage power supply 100 is connected to the backup power device 300.

[0078] In this way, by connecting the mains power to the backup power device 300 through the energy storage power supply 100, once the mains power fails, the automatic transfer switch inside the energy storage power supply 100 will immediately act within milliseconds to cut off the mains power path, thereby achieving seamless power supply switching and ensuring the stable operation of the core loads of the household.

[0079] Specifically, in some embodiments, the power selection switch 330 of the manual transfer switch backup power device 310 is provided with a backup power supply position and a mains power supply position. When the power selection switch 330 is in the mains power supply position, the mains power can be directly connected to the backup power device 300. When the power selection switch 330 is in the backup power supply position, the energy storage power supply 100 can be connected to the backup power device 300.

[0080] In this embodiment, the energy storage power supply 100 is used in conjunction with the manual transfer switch backup power device 310, and the power selection switch 330 is set to the backup power supply position by default. When the mains power is normal, the mains power is directly and efficiently supplied to the backup power device 300 through the high-current bypass channel inside the energy storage power supply 100. At this time, the energy storage power supply 100 can be used as a smart junction box. Once the mains power fails, the transfer switch circuit 40 inside the energy storage power supply 100 can operate within milliseconds, cutting off the mains power path and seamlessly switching to the mode where the battery pack 20 supplies power to the load connected to the manual transfer switch backup power device MTS310 through the energy storage converter 30. It can be understood that for the user and the external MTS, since the MTS will always be on the backup power supply side, the switching process can be fully automatic and imperceptible.

[0081] Please see Figure 1 and Figure 2In some embodiments, the energy storage power supply 100 includes a first pluggable connector 60 and a second pluggable connector 70. The mains input socket 12 is pluggably connected to the mains socket 200 via the first pluggable connector 60, and the mains socket 200 is connected to the mains power. The generator input socket 14 is pluggably connected to the fuel generator 400 via the second pluggable connector 70.

[0082] Thus, the first pluggable connector 60 and the second pluggable connector 70 are used to connect to the mains socket 200 and the fuel generator 400, which facilitates the use and installation of the energy storage power supply 100.

[0083] In some embodiments, the first pluggable connector 60, the second pluggable connector 70, and the third pluggable connector 80 have essentially the same structure. Specifically, the first pluggable connector 60 and the second pluggable connector 70 have the same structure. The mains input socket 12 establishes a pluggable connection with the mains socket 200 through the first pluggable connector 60, and the generator input socket 14 is pluggably connected to the output end of the fuel generator 400 through the second pluggable connector 70.

[0084] Please see Figure 1 and Figure 3 In some embodiments, the energy storage converter 30 includes a bidirectional AC / DC converter 32 and a controller 31 connected to the bidirectional AC / DC converter 32. The transfer switch circuit 40 includes a first relay 45, a second relay 46, a third relay 47, and a fourth relay 48. The mains input terminal 41 is connected to the bidirectional AC / DC converter 32 in sequence through the second relay 46 and the first relay 45. The load output terminal 43 is connected to the bidirectional AC / DC converter 32 in sequence through the third relay 47 and the first relay 45. The generator input terminal 44 is connected to the bidirectional AC / DC converter 32 in sequence through the fourth relay 48, the third relay 47, and the first relay 45. The controller 31 is connected to the first relay 45, the second relay 46, the third relay 47, and the fourth relay 48 and is configured to control the on / off state of the first relay 45, the second relay 46, the third relay 47, and the fourth relay 48.

[0085] Thus, by setting up a circuit structure with the first relay 45, the second relay 46, the third relay 47, and the fourth relay 48, automatic switching between mains power, battery pack 20, and fuel generator 400 is achieved, which helps to ensure the continuity and stability of power supply and avoid power outages.

[0086] In other words, in this embodiment, the controller 31 is part of the energy storage converter 30, which allows for component reuse and reduces costs. Of course, in other embodiments, the controller 31 can also be a separate device to achieve better functionality.

[0087] Specifically, in this embodiment, the bidirectional AC / DC converter 32 includes IGBT power modules, filter inductors, capacitors, and other components. These components are integrated through a printed circuit board (PCB). The controller 31 uses a microcontroller or DSP chip as the core control unit and is integrated on the same PCB. It is electrically connected to the power module of the bidirectional AC / DC converter 32 through copper foil lines on the PCB.

[0088] In this embodiment, the switching circuit 40 includes a first relay 45, a second relay 46, a third relay 47, and a fourth relay 48. The four relays can be electromagnetic relays, which have the ability to carry large currents and can be fixed to the mounting bracket inside the housing 10 of the energy storage power supply 100 by bolts. The contacts and coils of the relays are connected to the corresponding components by wires.

[0089] The AC input terminal 41 of the transfer switch circuit 40 is connected to the AC input terminal of the bidirectional AC / DC converter 32 via a wire, after being connected in series with the second relay 46 and the first relay 45. The load output terminal 43 is connected to the AC output terminal of the bidirectional AC / DC converter 32 via a wire, after being connected in series with the third relay 47 and the first relay 45. The generator input terminal 44 is connected to the bidirectional AC / DC converter 32 via a wire, after being connected in series with the fourth relay 48, the third relay 47 and the first relay 45. The generator input terminal 44 is also connected to the load output terminal 43 via a wire, after being connected in series with the fourth relay 48.

[0090] In this embodiment, the controller 31 can be connected to the first relay 45, the second relay 46, the third relay 47 and the fourth relay 48 via wired or wireless connection. The high and low level signals output by the controller 31 can control the on and off of each relay coil, thereby controlling the closing and opening of the relay contacts.

[0091] Please see Figure 3In some embodiments, the mains input socket 12 includes a single-phase mains input socket 121 and a split-phase mains input socket 122. The second relay 46 includes a first moving contact 461 and a first stationary contact 462. The first moving contact 461 is connected to the first relay 45 and the third relay 47. The first stationary contact 462 includes a first L1 contact 4621, a first L2 contact 4622, a first neutral contact 4623, and a first ground contact 4624. 1 is connected to the L1 live wire of the single-phase mains input socket 121 and the L1 live wire of the split-phase mains input socket 122 respectively. The first L2 contact 4622 is connected to the L2 live wire of the split-phase mains input socket 122. The first neutral contact 4623 is connected to the neutral wire of the single-phase mains input socket 121 and the neutral wire of the split-phase mains input socket 122 respectively. The first ground contact 4624 is connected to the ground wire of the single-phase mains input socket 121 and the ground wire of the split-phase mains input socket 122 respectively.

[0092] In this way, by specifically defining the wiring method of the single-phase and split-phase input load output socket 13, the equipment can be flexibly adapted to single-phase and split-phase mains power, making it easy to install and use in different power environments.

[0093] Specifically, in the embodiments of this application, the moving contact and the stationary contact are two metal contact points inside the relay that are responsible for connecting or disconnecting the circuit. The moving contact is a contact assembly in the relay or functional electrical appliance that realizes the connection or disconnection of the circuit through mechanical displacement, while the stationary contact is a fixed contact assembly that does not move with the actuator.

[0094] In some embodiments, the first moving contact 461 of the second relay 46 is connected to the common connection terminal of the first relay 45 and the third relay 47 via a wire to achieve conduction with the subsequent circuit; the first L1 contact 4621 is electrically connected to the L1 live wire terminal of the single-phase mains input socket 121 and the L1 live wire terminal of the split-phase mains input socket 122 via a wire; the first L2 contact 4622 is electrically connected to the L2 live wire terminal of the split-phase mains input socket 122 via a wire; the first neutral wire contact 4623 is electrically connected to the neutral wire terminal of the single-phase mains input socket 121 and the neutral wire terminal of the split-phase mains input socket 122 via a wire; and the first ground wire contact 4624 is electrically connected to the ground wire terminal of the single-phase mains input socket 121 and the ground wire terminal of the split-phase mains input socket 122 via a wire.

[0095] Specifically, when a household uses single-phase mains power, the user can insert the single-phase mains connector into the single-phase mains input socket 121. At this time, the first moving contact 461 of the second relay 46 engages with the first L1 contact 4621, the first neutral contact 4623, and the first ground contact 4624 to achieve single-phase mains power access. When a household uses split-phase mains power, the split-phase mains connector is inserted into the split-phase mains input socket 122. The first moving contact 461 of the second relay 46 engages with all stationary contacts to achieve complete access for the L1 and L2 live wires, as well as the neutral and ground wires.

[0096] Please see Figures 1 to 3 In some embodiments, the mains socket 200 includes a single-phase mains socket 210 and a split-phase mains socket 220. The first pluggable connector 60 includes a single-phase input line 61 and a split-phase input line 62. The single-phase input line 61 includes a single-phase input plug 611 and a single-phase output plug 612. The single-phase input plug 611 is used for pluggable connection with the single-phase mains socket 210, and the single-phase output plug 612 is used for pluggable connection with the single-phase mains input socket 121. The split-phase input line 62 includes a split-phase input plug 621 and a split-phase input plug 622. The split-phase input plug 621 is used for pluggable connection with the split-phase mains socket 220, and the split-phase output plug 622 is used for pluggable connection with the split-phase mains input socket 122.

[0097] Thus, the mains input socket 12 can be connected to the mains via a single-phase input line 61 or a split-phase input line 62, so that the energy storage power supply 100 can serve as a backup power source for either single-phase or split-phase mains power.

[0098] Specifically, in this embodiment, the mains socket 200 includes a common household single-phase mains socket 210 and a split-phase mains socket 220. The single-phase mains socket 210 is a standard three-hole socket with a rated voltage of 120V. The split-phase mains socket 220 is a special socket adapted for split-phase power supply, with L1 and L2 live wire sockets and neutral and ground wire sockets. The rated voltage is set according to regional standards, such as 240V split-phase voltage in North America.

[0099] In some embodiments, the first pluggable connector 60 includes two specifications: a single-phase input line 61 and a split-phase input line 62. The structures of the two input lines are basically the same. Specifically, the single-phase input plug 611 of the single-phase input line 61 is a standard three-prong plug, corresponding to the socket layout of the single-phase mains socket 210; the single-phase output plug 612 is a three-prong plug, corresponding to the single-phase mains input socket 121 of the energy storage power supply 100. The split-phase input plug 621 of the split-phase input line 62 is a multi-prong plug, matching the socket layout of the split-phase mains socket 220; the split-phase output plug 622 is a multi-prong plug, matching the split-phase mains input socket 122 of the energy storage power supply 100.

[0100] In this embodiment, the second pluggable connector 70 and the third pluggable connector 80 have a structure that is basically the same as that of the first pluggable connector 60, and will not be described in detail here.

[0101] In some embodiments, the maximum overcurrent value of the single-phase mains input socket 121 and the single-phase input line 61 is 30A, and the maximum overcurrent value of the split-phase mains input socket 122 and the split-phase input line 62 is 50A, 80A, 100A, 120A, 150A or 200A.

[0102] Thus, the input line of the energy storage power supply 100 has a strong overcurrent capacity, which is conducive to adapting to larger loads.

[0103] Specifically, in this embodiment, the maximum overcurrent value of the single-phase mains input socket 121 and the single-phase input line 61 is set to 30A, while the maximum overcurrent value of the split-phase mains input socket 122 and the split-phase input line 62 is set to various specifications, including 50A, 80A, 100A, 120A, 150A, or 200A. For example, the 30A single-phase input line 61 can meet the power supply requirements of single-phase loads with a rated power of less than 6kW (such as refrigerators, washing machines, air conditioners, etc.); the 50A split-phase input line 62 can meet the requirements of split-phase loads with a rated power of less than 12kW; and the 100A and above split-phase input lines 62 can be adapted to high-power household electrical appliances (such as electric water heaters, ovens, etc.) or scenarios where multiple loads operate simultaneously. This multi-specification overcurrent capacity design allows the energy storage power supply 100 to be flexibly configured according to the actual power requirements of the household load, avoiding component damage or power outages due to insufficient overcurrent capacity, and also improving the market applicability of the product, meeting the personalized needs of different families.

[0104] Please see Figures 1 to 3 In some embodiments, the load output socket 13 includes a single-phase output socket 131 and a split-phase output socket 132. The third relay 47 includes a second moving contact 471 and a second stationary contact 472. The second stationary contact 472 is connected to the first relay 45 and the second relay 46, respectively. The second moving contact 471 includes a second L1 contact 4721, a second L2 contact 4722, a second neutral contact 4723, and a second ground contact 4724. The second L1 contact 4721 is connected to the L1 live wire of the single-phase output socket 131 and the L1 live wire of the split-phase output socket 132, respectively. The second L2 contact 4722 is connected to the L2 live wire of the split-phase output socket 132, respectively. The second neutral contact 4723 is connected to the neutral wire of the single-phase output socket 131 and the neutral wire of the split-phase output socket 132, respectively. The second ground contact 4724 is connected to the ground wire of the single-phase output socket 131 and the ground wire of the split-phase output socket 132, respectively.

[0105] In this way, by specifically defining the wiring methods of single-phase and split-phase output sockets 132, the equipment can be flexibly adapted to single-phase and split-phase mains power, making it easy to install and use in different power environments.

[0106] Specifically, in this embodiment, the load output socket 13 is also integrated into the housing 10 of the energy storage power supply 100, and is arranged adjacent to the mains input socket 12. It includes a single-phase output socket 131 and a split-phase output socket 132. The single-phase output socket 131 is a standard three-hole socket structure; the split-phase output socket 132 is a multi-hole structure, with L1 and L2 live wire sockets and neutral and ground wire sockets, which can meet the power supply requirements of split-phase loads.

[0107] In this embodiment, the second moving contact 471 of the second relay 46 is connected to the common connection terminal of the first relay 45 and the third relay 47 via a wire to achieve conduction with the preceding circuit; the second L1 contact 4721 is electrically connected to the live wire terminal of the single-phase output socket 131 and the L1 live wire terminal of the split-phase output socket 132 via a wire; the second L2 contact 4722 is electrically connected to the L2 live wire terminal of the split-phase output socket 132 via a wire; the second neutral wire contact 4723 is electrically connected to the neutral wire terminal of the single-phase output socket 131 and the neutral wire terminal of the split-phase output socket 132 via a wire; and the second ground wire contact 4724 is electrically connected to the ground wire terminal of the single-phase output socket 131 and the ground wire terminal of the split-phase output socket 132 via a wire.

[0108] In this embodiment, when powering a single-phase load, the user can insert the second pluggable connector 70 into the single-phase output socket 131, and the controller 31 controls the second moving contact 471 of the second relay 46 to engage with the second L1 contact 4721, the second neutral contact 4723, and the second ground contact 4724 to achieve the output of single-phase AC power; when powering a split-phase load, the user inserts the second pluggable connector 70 into the split-phase output socket 132, and the controller 31 controls the second moving contact 471 of the second relay 46 to engage with all stationary contacts to achieve the complete output of split-phase AC power.

[0109] Please see Figures 1 to 3In some embodiments, the generator input socket 14 includes a single-phase generator socket 141 and a split-phase generator socket 142. The fourth relay 48 includes a third moving contact 481 and a third stationary contact 482. The third stationary contact 482 is connected to the third relay 47. The third moving contact 481 includes a third L1 contact 4821, a third L2 contact 4822, a third neutral contact 4823, and a third ground contact 4824. The third L1 contact 4821... 821 is connected to the live wire of single-phase generator socket 141 and the L1 live wire of split-phase generator socket 142 respectively. The third L2 contact 4822 is connected to the L2 live wire of split-phase generator socket 142. The third neutral contact 4823 is connected to the neutral wire of single-phase generator socket 141 and the neutral wire of split-phase generator socket 142 respectively. The third ground contact 4824 is connected to the ground wire of single-phase generator socket 141 and the ground wire of split-phase generator socket 142 respectively.

[0110] In this way, by specifically defining the wiring method of the single-phase and split-phase generator socket 142, the equipment can be flexibly adapted to single-phase and split-phase fuel generators 400, making it easy to adapt to different types of generators.

[0111] Specifically, in some embodiments, the third moving contact 481 of the fourth relay 48 is connected to the common connection terminal of the third relay 47 via a wire to achieve conduction with the subsequent circuit; the third L1 contact 4821 is electrically connected to the L1 live wire terminal of the single-phase generator socket 141 and the L1 live wire terminal of the split-phase generator socket 142 via a wire; the third L2 contact 4822 is electrically connected to the L2 live wire terminal of the split-phase generator socket 142 via a wire; the third neutral contact 4823 is electrically connected to the neutral wire terminal of the single-phase generator socket 141 and the neutral wire terminal of the split-phase generator socket 142 via a wire; and the third ground contact 4824 is electrically connected to the ground wire terminal of the single-phase generator socket 141 and the ground wire terminal of the split-phase generator socket 142 via a wire.

[0112] Specifically, when a household uses a single-phase fuel generator 400, the third moving contact 481 of the fourth relay 48 engages with the third L1 contact 4821, the third neutral contact 4823, and the third ground contact 4824 to connect the single-phase fuel generator 400; when a household uses a split-phase fuel generator 400, the third moving contact 481 of the fourth relay 48 engages with all stationary contacts to achieve complete connection of the L1 and L2 live wires, as well as the neutral and ground wires.

[0113] In some embodiments, the controller 31 is also configured to, in the event of an abnormal mains voltage, control the energy storage power supply 100 to a voltage source mode if the fuel generator 400 is not started, and control the fuel generator 400 to a current source mode if the fuel generator 400 is started.

[0114] Thus, in the event of abnormal mains voltage, the energy storage power supply 100 can be switched to voltage source mode or current source mode according to the operating status of the fuel generator 400, which helps to stabilize the output voltage and improve the stability and efficiency of power supply.

[0115] In some embodiments, the switching between voltage source mode and current source mode is controlled by controller 31. Specifically, controller 31 uses a voltage detection module to detect abnormal mains voltage and the start-up status of fuel generator 400. The voltage detection module determines the start-up status by collecting the output voltage signal of fuel generator 400.

[0116] In some embodiments, the starting status of the fuel generator 400 can also be determined by detecting the rotational speed signal.

[0117] When an abnormal mains voltage is detected and the fuel generator 400 is not started, the controller 31 outputs a voltage source mode control signal to enable the energy storage converter 30 to output a stable AC voltage. At this time, the energy storage power supply 100 acts as a voltage source to supply power to the load. When the fuel generator 400 is detected to be started, the controller 31 outputs a signal to control the excitation regulation module of the fuel generator 400 to enable the fuel generator 400 to output a stable voltage. At the same time, it outputs a current source mode control signal, and the energy storage converter 30 switches to current source mode. By controlling the magnitude and phase of the output current, it supplies power in coordination with the fuel generator 400.

[0118] Please see Figure 7 In some embodiments, step 03 includes: 031: Obtain the startup status of the fuel generator; 032: When the fuel generator starts successfully, connect the generator input terminal to the load output terminal; 033: In the event of a failure to start the fuel generator, keep the energy storage converter connected to the load output.

[0119] In this way, by acquiring the starting status of the fuel generator 400 in real time and intelligently controlling the connection between the generator socket and the output socket accordingly, a fault-tolerant mechanism is achieved that seamlessly switches to generator power supply when the generator starts successfully, and automatically maintains power supply from the battery pack 20 when the generator fails to start. This greatly improves the reliability and continuity of the power supply system and effectively avoids power outages caused by generator starting failure.

[0120] Specifically, in this embodiment, the controller 31 detects the starting status of the fuel generator 400 through the voltage detection module to determine whether the generator has started. During the starting process of the fuel generator 400, the voltage detection module collects relevant signals in real time and transmits them to the controller 31. The controller 31 determines the starting status of the fuel generator 400 based on the collected signals: if the output voltage reaches the rated voltage, the start is considered successful; if the start time exceeds the preset time and the output voltage still does not reach the rated voltage, the start is considered unsuccessful.

[0121] In this embodiment, when startup is successful, the controller 31 outputs a control signal to the transfer switch circuit 40, connecting the generator input terminal 44 with the load output terminal 43. When startup fails, the controller 31 continues to output a control signal to the transfer switch circuit 40, keeping the relays corresponding to the energy storage converter terminal 42 and the load output terminal 43 in an engaged state, allowing the bidirectional AC / DC converter 32 to continue operating, and the battery pack 20 to continuously supply power to the load.

[0122] In some embodiments, when startup fails, the controller 31 can also output an alarm signal to the user terminal to remind the user that the fuel generator 400 has failed to start.

[0123] In some embodiments, the controller 31 is further configured to, in the event of an abnormal mains voltage, if the fuel generator 400 has been started, acquire the voltage phase, amplitude, and frequency of the fuel generator 400 and control the output voltage of the bidirectional AC / DC converter 32 to have a phase difference of no more than ±2° with respect to the voltage of the fuel generator 400, an amplitude difference of no more than ±10% with respect to the voltage of the fuel generator 400, and a frequency difference of no more than ±0.5Hz with respect to the voltage of the fuel generator 400.

[0124] In this way, by controlling the output voltage of the bidirectional AC / DC converter 32, voltage tracking of the fuel generator 400 can be achieved, improving the intelligence of the energy storage power supply 100 and helping to reduce the user's electricity costs.

[0125] Specifically, the controller 31 can acquire the voltage phase, amplitude, and frequency information of the fuel generator 400 in real time through a voltage sampling circuit, which can be connected in parallel to the generator input terminal 44 of the transfer switch circuit 40. The controller 31 controls the phase difference between the output voltage of the bidirectional AC / DC converter 32 and the output voltage of the fuel generator 400 to not exceed ±2°, the amplitude difference to not exceed ±10%, and the frequency difference to not exceed ±0.5Hz. In some embodiments, the controller 31 controls the phase difference between the output voltage of the bidirectional AC / DC converter 32 and the output voltage of the fuel generator 400 to be ±1°, the amplitude difference to be ±8%, ±6%, ±4%, or ±2%, and the frequency difference to be ±0.5Hz, ±0.4Hz, ±0.3Hz, ±0.2Hz, and ±0.1Hz. In this embodiment, the controller 31 should control the output voltage of the bidirectional AC / DC converter 32 to be substantially the same as the phase, amplitude, and frequency of the voltage of the fuel generator 400, that is, the phase difference is 0°, the amplitude difference can be 0%, and the frequency difference can be 0Hz.

[0126] This high-precision voltage tracking ensures a high degree of voltage matching between the bidirectional AC / DC converter 32 and the fuel generator 400, preventing inrush currents caused by excessive voltage parameter differences, protecting the load equipment and the components of the energy storage power supply 100, and enabling seamless switching to avoid power outages or voltage fluctuations affecting the load. Simultaneously, precise voltage regulation also improves the charging efficiency of the battery pack 20, increasing charging speed and safety, and further reducing user electricity costs.

[0127] Please see Figures 1 to 3 In some embodiments, the controller 31 is also configured to control the transfer switch circuit 40 to connect the mains input terminal 41 and the load output terminal 43 when the mains voltage is normal, and / or to control the transfer switch circuit 40 to connect the energy storage converter terminal 42 and the load output terminal 43.

[0128] In this way, the energy storage power supply 100 can supply power to the load together with the mains power when there is mains power.

[0129] Specifically, in some embodiments, when the mains voltage is detected to be within the normal range, the controller 31 can output a control signal to the transfer switch circuit 40. When the controller 31 controls the transfer switch circuit 40 to connect only the mains input terminal 41 and the load output terminal 43, the mains power directly supplies power to the load through the transfer switch circuit 40. At this time, the energy storage power supply 100 is in standby mode, and the battery pack 20 is float-charged through the mains power. When the controller 31 controls the transfer switch circuit 40 to connect both the mains input terminal 41 and the load output terminal 43, and the energy storage converter terminal 42 and the load output terminal 43, the mains power and the energy storage power supply 100 work together to supply power to the load. At this time, the controller 31 collects the load current signal through the voltage detection module and allocates the power supply ratio of the mains power and the energy storage power supply 100 according to the load current to ensure stable power supply. The energy storage converter terminal 42 operates in inverter mode during the collaborative power supply process, converting the DC power of the battery pack 20 into AC power with the same frequency and phase as the mains power, realizing seamless parallel power supply with the mains power.

[0130] In some embodiments, the controller 31 is also configured to control the energy storage power supply 100 in current source mode when there is mains power.

[0131] Thus, by switching the energy storage power supply 100 to current source mode, it is beneficial to stabilize the output voltage and improve the stability and efficiency of power supply.

[0132] Specifically, in some embodiments, after the controller 31 determines that the mains power is in a normal supply state, it outputs a current source mode control signal to control the energy storage power supply 100 to operate in current source mode. In current source mode, the output current of the energy storage power supply 100 is dynamically adjusted by the controller 31 according to the load demand and the mains power supply capacity. Specifically, the controller 31 calculates the amount of current that the energy storage power supply 100 needs to supplement by collecting the total load current signal and the mains output current signal, and then adjusts the output current by controlling the duty cycle of the PWM modulation signal of the inverter module. At this time, the mains power acts as the main power supply, and the energy storage power supply 100 acts as the auxiliary power supply, with both working together to supply power to the load.

[0133] In some embodiments, the controller 31 is further configured to acquire the voltage phase, amplitude, and frequency of the mains power and control the phase difference between the output voltage of the bidirectional AC / DC converter 32 and the mains power voltage to not exceed ±2°, the amplitude difference between the output voltage of the bidirectional AC / DC converter 32 and the mains power voltage to not exceed ±10%, and the frequency difference between the output voltage of the bidirectional AC / DC converter 32 and the mains power voltage to not exceed ±0.5Hz.

[0134] In this way, by controlling the output voltage of the bidirectional AC / DC converter 32, mains power tracking can be achieved, improving the intelligence of the energy storage power supply 100 and helping to reduce users' electricity costs.

[0135] Specifically, similar to the voltage tracking of the fuel generator 400, the controller 31 can acquire the phase, amplitude, and frequency information of the mains voltage in real time through a voltage sampling circuit, which can be connected in parallel to the mains input terminal 41 of the transfer switch circuit 40. The controller 31 controls the output voltage of the bidirectional AC / DC converter 32 to have a phase difference of no more than ±2°, an amplitude difference of no more than ±10%, and a frequency difference of no more than ±0.5Hz with respect to the mains voltage. In some embodiments, the phase difference can be ±1°, the amplitude difference can be ±8%, ±6%, ±4%, or ±2%, and the frequency difference can be ±0.5Hz, ±0.4Hz, ±0.3Hz, ±0.2Hz, and ±0.1Hz. In this embodiment, the controller 31 should control the output voltage of the bidirectional AC / DC converter 32 to have essentially the same phase, amplitude, and frequency as the mains voltage, that is, a phase difference of 0°, an amplitude difference of 0%, and a frequency difference of 0Hz.

[0136] Through this high-precision mains power tracking, when the energy storage power supply 100 is in grid-connected power supply or switching process, it can ensure that the output voltage of the bidirectional AC / DC converter 32 is highly matched with the mains voltage, avoiding inrush current caused by excessive voltage parameter differences, and protecting the load equipment and the components of the energy storage power supply 100 itself. In the cooperative power supply mode during peak mains power hours, the mains power and the power supply of the battery pack 20 can be smoothly superimposed; during the switching process when the mains power returns to normal or abnormal, seamless switching can be achieved, avoiding the impact of power interruption or voltage fluctuation on the load. At the same time, precise voltage regulation is also conducive to improving the charging efficiency of the battery pack 20. When charging during off-peak mains power hours, the bidirectional AC / DC converter 32 can output a matching charging voltage, improving charging speed and safety, and further reducing the user's electricity costs.

[0137] Please see Figures 1 to 3 In some embodiments, the controller 31 is further configured to close the first relay 45 and the third relay 47 and open the second relay 46 when the mains voltage is abnormal or when a first predetermined condition is met. The first predetermined condition includes that the current time is during the peak power consumption period of the mains and the SOC of the battery pack 20 is greater than or equal to a first preset value.

[0138] Thus, during peak mains power hours and when battery pack 20 has sufficient charge, disconnecting the mains power and using only battery pack 20 for power supply helps reduce electricity costs and improve energy economy.

[0139] Specifically, in this embodiment, when the mains voltage is abnormal or a first predetermined condition is met, the controller 31 outputs a control signal to energize the coils of the first relay 45 and the third relay 47, closing their contacts, while simultaneously de-energizing the coil of the second relay 46, opening its contacts. The first predetermined condition includes the current time being during peak mains power consumption and the SOC of the battery pack 20 being greater than or equal to a first preset value. The peak power consumption period can be preset to 8:00-11:00 and 18:00-21:00 daily.

[0140] Through this control logic, when the mains power is at its peak and the battery pack 20 has sufficient power, the mains power is disconnected and only the battery pack 20 is used for power supply. This avoids using high-priced mains power during peak hours, effectively reducing the user's electricity costs. At the same time, it makes reasonable use of the electrical energy stored in the battery pack 20, improving energy economy.

[0141] Please see Figures 1 to 3 In some embodiments, the controller 31 is further configured to control the first relay 45, the second relay 46 and the third relay 47 to close when a second predetermined condition is met, so that the battery pack 20 and the mains power supply simultaneously supply power to the AC load. The second predetermined condition includes that the current time is during the peak power consumption period of the mains power and the SOC of the battery pack 20 is greater than a second preset value and less than a first preset value.

[0142] In this way, when the mains power is at its peak and the battery pack 20 is low on power, both mains power and the battery pack 20 can be used to supply power, thus preventing the battery pack 20 from being over-discharged and damaged.

[0143] Specifically, in this embodiment, the controller 31 is further configured to simultaneously close the first relay 45, the second relay 46, and the third relay 47 when a second predetermined condition is met, so that the battery pack 20 and the mains power supply simultaneously supply AC load. The second predetermined condition includes the current time being during peak mains power consumption and the SOC of the battery pack 20 being greater than a second preset value and less than a first preset value. The second preset value can be preset to 30% based on the minimum protection charge of the battery pack 20, while the first preset value remains 80%. At this time, the bidirectional AC / DC converter 32 operates in a coordinated power supply state, and the controller 31 can allocate the power supply ratio between the mains power and the battery pack 20 according to the load power demand and the battery SOC value, ensuring that the discharge current of the battery pack 20 does not exceed the rated value.

[0144] For example, when the load power is high and the battery pack 20's SOC is around 50%, the mains power supplies 60% of the load power, while the battery pack 20 supplies 40%. When the load power is low, the power supply ratio of the battery pack 20 can be appropriately reduced. Through this coordinated power supply mode, when the mains power is at its peak and the battery pack 20's charge is insufficient, the power supply demand of the load can be met, while preventing the battery pack 20 from being damaged due to over-discharge, thus extending the battery pack 20's lifespan. At the same time, compared to using mains power entirely, it can still reduce electricity costs to some extent.

[0145] In some embodiments, the controller 31 is connected to the bidirectional AC / DC converter 32 and is configured to control the output power of the bidirectional AC / DC converter 32.

[0146] In this way, by enabling the controller 31 to communicate with the bidirectional AC / DC converter 32 and control its output power, the precise adjustment and management of the inverter output power of the energy storage power supply 100 is realized. This is beneficial for dynamically adjusting the power supply capacity according to the load demand and for realizing energy optimization control under different working modes.

[0147] In some embodiments, the controller 31 establishes a communication connection with the bidirectional AC / DC converter 32 to achieve precise adjustment and management of its output power, adapting to different load demands and operating modes, and improving the flexibility and rationality of energy utilization. Specifically, the controller 31 has a built-in power control algorithm that calculates the target output power of the bidirectional AC / DC converter 32 based on parameters such as the current operating mode (e.g., backup power mode, collaborative power supply mode, or charging mode), load power demand, and battery SOC value, and transmits the power control command to the bidirectional AC / DC converter 32 through the communication bus.

[0148] Furthermore, the bidirectional AC / DC converter 32 has a built-in power detection module that detects its own output power in real time and feeds back the actual power information to the controller 31 through the communication bus. The controller 31 adjusts the control commands according to the feedback information to form a power closed-loop control.

[0149] For example, in backup power mode, the output power can be dynamically adjusted according to the actual power demand of the load, avoiding energy waste caused by power redundancy; in collaborative power supply mode, the power supply of the mains power and the battery pack 20 can be precisely allocated to ensure power supply balance; in charging mode, the charging power can be adjusted according to the battery's SOC value to improve charging efficiency and protect the battery. At the same time, it facilitates energy optimization control in different working modes, improving the intelligence level and energy economy of the entire household load backup power system 1000.

[0150] Please see Figures 1 to 3In some embodiments, the controller 31 is also configured to close the first relay 45, the second relay 46 and the third relay 47 when the current time is during a low period of mains power consumption, so that the mains power can simultaneously supply power to the battery pack 20 and the AC load.

[0151] In this way, when the mains power is at its lowest, the AC load is powered by the mains power while the battery pack 20 is charged, thus saving on power supply costs.

[0152] Specifically, in this embodiment, when the current time is during a low-power period, the controller 31 controls three relays to close, allowing the mains power to simultaneously supply power to both the battery pack 20 and the AC load. This control mode utilizes low-cost mains power during off-peak hours to charge the battery pack 20, reducing charging costs. Simultaneously, the charging process does not affect the normal operation of the load, avoiding the occupancy of power supply to the load during standalone charging. Furthermore, compared to recharging the battery pack 20 after it is completely depleted, timely charging during off-peak hours prevents over-discharge of the battery pack 20, further protecting it and extending its lifespan.

[0153] In some embodiments, controller 31 communicates with bidirectional AC / DC converter 32, and controller 31 is also configured to control the input power of bidirectional AC / DC converter 32 according to the power demand of the load.

[0154] In this way, by controlling the input power of the bidirectional AC / DC converter 32 according to the power demand of the load, intelligent regulation of the battery charging power is realized when the mains power is supplied. This is beneficial to prioritize the continuity and stability of the load power supply and facilitates efficient and safe replenishment of the battery during off-peak hours.

[0155] Specifically, in this embodiment, when the current time is during a low-power period of the mains electricity, the controller 31 prioritizes the power supply needs of the load. When the load power is large, the charging power of the battery pack 20 is automatically reduced; when the load power is small, the charging power is increased to ensure that the total power consumption of the mains electricity does not exceed the preset safety threshold.

[0156] For example, when the load power demand suddenly increases, the controller 31 quickly reduces the input power of the bidirectional AC / DC converter 32 to prioritize ensuring that the load receives sufficient power; when the load power demand decreases, the controller 31 gradually increases the input power to accelerate the charging speed of the battery pack 20. In this way, the optimal allocation of mains power is achieved, ensuring both the continuity and stability of the load power supply, and charging the battery pack 20 with the maximum safe power within the allowable range of load power, thereby improving charging efficiency.

[0157] Please see Figures 1 to 3In some embodiments, the energy storage power supply 100 further includes a third pluggable connector 80, through which the load output socket 13 is connected to the backup power device 300, which is connected to at least one AC load.

[0158] Thus, the third pluggable connector 80 is used to connect to the backup power device 300, which facilitates the use and installation of the energy storage power supply 100.

[0159] Specifically, in some embodiments, the energy storage power supply 100 also includes a third pluggable connector 80. The third pluggable connector 80 adopts the same standardized structure as the first and second pluggable connectors 70 to ensure universality and facilitate unified procurement and replacement by users. The rated current and rated voltage of the connector are matched with the parameters of the load output socket 13 to meet the power supply needs of household loads.

[0160] Optionally, in some embodiments, the third pluggable connector 80 may be an aviation plug, which has higher connection reliability and anti-interference performance, and is suitable for scenarios with high requirements for connection stability. In some embodiments, the third pluggable connector 80 can also be a common household three-hole pluggable connector, which helps to reduce costs.

[0161] In some embodiments, the maximum overcurrent value of the mains input socket 12 is 30A, 50A, 80A, 100A, 150A, or 200A.

[0162] Thus, the AC input socket 12 of the energy storage power supply 100 has a strong overcurrent capacity, which is conducive to adapting to larger loads.

[0163] Specifically, the maximum overcurrent value of the AC power input socket 12 is set in various specifications, including 30A, 50A, 80A, 100A, 150A or 200A, and different specifications of AC power input socket 12 correspond to different internal structures.

[0164] The AC power input socket 12 has strong overcurrent capacity and can adapt to AC power input requirements of different power levels. For example, the 30A AC power input socket 12 is suitable for low-power household load scenarios and can meet the total power requirements of daily household appliances (such as refrigerators, televisions, computers, etc.); the 50A to 80A AC power input socket 12 is suitable for medium-power scenarios and can be adapted to high-power single loads or multiple loads operating simultaneously, such as air conditioners and electric water heaters; the 100A and above AC power input socket 12 is suitable for high-power split-phase load scenarios and can meet the needs of multiple high-power devices operating simultaneously in large homes such as villas.

[0165] In some embodiments, the maximum overcurrent value of the switching circuit 40 is 30A, 50A, 80A, 100A, 150A, or 200A.

[0166] Thus, the switching circuit 40 of the energy storage power supply 100 has a strong overcurrent capability, which is beneficial for adapting to larger loads.

[0167] Specifically, in some embodiments, the maximum overcurrent value of the changeover switch circuit 40 is set to various specifications such as 30A, 50A, 80A, 100A, 150A or 200A. For example, the changeover switch circuit 40 with a 30A specification uses a relay with a 30A rated current, the 50A specification uses a relay with a 50A rated current, and the 100A and above specifications use a contactor instead of a relay to ensure that the current carrying capacity of each component is consistent and to avoid local components becoming overcurrent bottlenecks.

[0168] In some embodiments, the maximum overcurrent value of the load output socket 13 is 30A, 50A, 80A, 100A, 150A, or 200A.

[0169] Thus, the load output socket 13 equipped with the energy storage power supply 100 has a strong overcurrent capacity, which is conducive to adapting to larger loads.

[0170] Specifically, in some embodiments, the maximum overcurrent value of the load output socket 13 is matched with the overcurrent specifications of the mains input socket 12 and the changeover switch circuit 40, and is also set to various specifications such as 30A, 50A, 80A, 100A, 150A or 200A.

[0171] In some embodiments, the load output socket 13 has a strong overcurrent capacity and can adapt to household loads of different power. For example, a 30A load output socket 13 can meet the power supply needs of small and medium power household appliances in daily life; a 50A to 80A load output socket 13 can be adapted to high-power loads such as air conditioners and electric water heaters; and a 100A and above load output socket 13 can meet the needs of multiple high-power devices operating simultaneously in large houses such as villas.

[0172] In some embodiments, the maximum overcurrent value of the generator input socket 14 is 30A, 50A, 80A, 100A, 150A or 200A.

[0173] Thus, the generator input socket 14 equipped with the energy storage power supply 100 has a strong overcurrent capacity, which is conducive to adapting to larger loads.

[0174] Specifically, in some embodiments, the maximum overcurrent value of the generator input socket 14 is matched with the overcurrent specifications of the mains input socket 12, the changeover switch circuit 40, and the load output socket 13, and is also set to various specifications such as 30A, 50A, 80A, 100A, 150A, or 200A.

[0175] In some embodiments, the generator input socket 14 has a strong overcurrent capacity, which can adapt to household loads of different power. For example, a 30A generator input socket 14 can meet the power supply needs of small and medium power household appliances; a 50A to 80A generator input socket 14 can be adapted to high-power loads such as air conditioners and electric water heaters; and a 100A and above generator input socket 14 can meet the needs of multiple high-power devices operating simultaneously in large households such as villas.

[0176] Please see Figure 4 In some embodiments, the energy storage power supply 100 includes a socket panel 11 disposed on the housing 10 and including a plurality of AC sockets 15.

[0177] Thus, by placing the AC socket 15 on the socket panel 11 of the housing, it is easy for users to quickly connect the load, improving the convenience of installation and use.

[0178] Specifically, in this embodiment, a socket panel 11 integrating multiple AC sockets 15 is provided on the energy storage power supply 100. The layout of the AC sockets 15 adopts a matrix or linear arrangement to ensure that sufficient space is reserved between each AC socket 15 for plugging and unplugging, and to avoid mutual interference between adjacent plugs.

[0179] In this embodiment of the application, the socket panel 11 is fixed to the outer shell 10 of the energy storage power supply 100 by bolts. A sealing ring is provided between the socket panel 11 and the outer shell 10 to improve the dustproof and waterproof performance. The surface of the socket panel 11 is printed with a clear load output socket 13 mark for easy identification by the user.

[0180] In this embodiment, by integrating multiple load output sockets 13 onto the socket panel 11, users can connect multiple household loads simultaneously without the need for additional power strips, reducing wiring clutter and improving tidiness. Furthermore, the load output sockets 13 integrated onto the socket panel 11 are typically single-phase output sockets 131, primarily designed for outdoor use with low power consumption up to 2400W.

[0181] Please see Figure 4 In some embodiments, the energy storage power supply 100 includes wheels 50, and the housing 10 is disposed on the wheels 50.

[0182] Thus, by mounting the outer casing 10 on the wheels 50, the energy storage power supply 100 can be moved easily, which helps to improve the portability of the energy storage power supply 100.

[0183] Specifically, in this embodiment, by providing wheels 50 on the outer casing 10 of the energy storage power supply 100, the portability of the product is improved, allowing users to flexibly move the energy storage power supply 100 according to the load location or usage needs. Specifically, there are four wheels 50, arranged in a rectangle at the four corners of the bottom of the outer casing 10 to ensure stable support. Each wheel 50 is connected to the outer casing 10 via a bracket, and the bracket is bolted to the mounting base at the bottom of the outer casing 10. Ball bearings are installed inside the wheels 50 to reduce rolling resistance.

[0184] In some embodiments, the single-phase AC input socket 121 is a standard flat-pin socket. This interface is suitable for connecting to the most common single-phase AC power for routine charging of the energy storage unit inside the device.

[0185] In some embodiments, the split-phase AC input socket 122 is a NEMA 14-50 socket. This interface can be used to connect a split-phase AC power supply (e.g., 240V split-phase) that provides higher power to enable rapid charging of the energy storage unit.

[0186] In some embodiments, the single-phase output socket 131 is a NEMA L14-30R specification socket. This interface is a snap-fit ​​connector that provides a 30-amp level single-phase AC output, ensuring a stable and reliable connection, and is suitable for driving single-phase high-power loads such as chainsaws and large lighting equipment.

[0187] In some embodiments, the split-phase output socket 132 is a NEMA 14-50 socket. This interface provides a complete split-phase AC output, capable of powering specialized equipment requiring 240V voltage, such as large welding machines, electric vehicle charging adapters, etc.

[0188] In some embodiments, the single-phase generator inlet 141 is a 30A generator inletbox for connecting a single-phase output gasoline or diesel generator.

[0189] In some embodiments, the split-phase generator socket 142 is a 50A generator inletbox for connecting a high-power split-phase output generator. This design allows the device to act as a buffer and stabilizing unit between the generator and the load, improving power quality and protecting downstream equipment.

[0190] In some embodiments, the socket panel 11 integrates at least one AC socket 15, which includes a NEMA 5-20 socket. This interface is a standard household socket specification, used to provide convenient 120V AC power to various common low-voltage single-phase electrical devices (such as laptops, lamps, small appliances, etc.). In some embodiments, the AC socket 15 may also include a single-phase socket and / or a split-phase socket, which can be used for electrical connection to the backup power device 300 to supply power to loads connected to the backup power device 300.

[0191] Please see Figure 8 In some embodiments, the method further includes: Step 04: Obtain the power supply status at the AC power input terminal; Step 05: When the mains input is disconnected, keep the generator input connected to the load output, or keep the energy storage converter connected to the load output. Step 06: When there is power at the mains input terminal, turn off the fuel generator and disconnect the generator input terminal from the load output terminal, while simultaneously connecting the mains input terminal and the energy storage converter terminal to the load output terminal.

[0192] In this way, by monitoring the power supply status of the mains input terminal 41 in real time and automatically controlling the start and stop of the fuel generator 400 and the connection relationship between different power sources and output sockets based on this status, intelligent fully automatic switching is achieved, which maintains the existing reliable power supply when the mains voltage is abnormal and automatically switches back to mains power supply and shuts down the generator when the mains power is restored. This ensures the continuity of power supply to the load and is also conducive to saving fuel.

[0193] Specifically, in some embodiments, the voltage detection module collects the power supply status signal of the mains input terminal 41 in real time and transmits the detection signal to the controller 31 every preset time (e.g., 1 second). The controller 31 analyzes the detection signal to determine whether the mains input terminal 41 is powered: if the voltage, frequency and phase are all within the normal range, it is determined that the mains input terminal 41 is powered; if they are all zero or outside the normal range, it is determined that the mains input terminal 41 is de-energized.

[0194] When the mains input terminal 41 is de-energized, the controller 31 maintains the previous control state. That is, if the generator was previously powered, the generator input terminal 44 is kept connected to the load output terminal 43, and the fuel generator 400 continues to run; if the battery pack 20 was previously powered, the energy storage converter terminal 42 is kept connected to the load output terminal 43, and the battery pack 20 continues to supply power, ensuring that the load power supply is not interrupted.

[0195] When the mains input terminal 41 is powered, the controller 31 immediately outputs a shutdown command to the fuel generator 400, stopping the fourth relay 48 from engaging and the fuel generator 400 from running. At the same time, the controller 31 outputs a control signal to the changeover switch circuit 40, controlling the relays corresponding to the fuel generator input terminal 44 and the load output terminal 43 to disconnect, and controlling the relays corresponding to the mains input terminal 41 and the energy storage converter terminal 42 and the load output terminal 43 to engage.

[0196] 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.

[0197] 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.

[0198] 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 source, characterized in that, include: shell; The mains input socket, the generator input socket, and the load output socket are provided on the housing; The mains input socket is used to connect to mains power, the generator input socket is used to connect to a fuel generator, the load output socket is used to connect to a backup power device, and the backup power device is connected to at least one AC load. The battery pack, energy storage converter, controller, and transfer switch circuit are disposed within the housing; The transfer switch circuit includes an AC power input terminal, an energy storage converter terminal, a generator input terminal, and a load output terminal. The AC power input terminal is connected to the AC power input socket, the energy storage converter terminal is connected to the battery pack via the energy storage converter, the generator input terminal is connected to the generator input socket, and the load output terminal is connected to the load output socket. The transfer switch circuit is used to control the on / off connection between the AC power input terminal, the energy storage converter terminal, the generator input terminal, and the load output terminal. The controller is configured to, in the event of an abnormal mains voltage: If the SOC of the battery pack is greater than or equal to the first preset value, the switching circuit is controlled to connect the energy storage converter terminal and the load output terminal, so that the DC power of the battery pack is converted into AC power by the energy storage converter and then supplied to the AC load. If the SOC of the battery pack is less than the first preset value, the fuel generator is started, and the transfer switch circuit is connected to the generator input terminal and the load output terminal, so that the AC power output by the fuel generator supplies power to the AC load through the generator input socket and the load output socket.

2. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply includes a first pluggable connector and a second pluggable connector. The mains power input socket is pluggably connected to the mains power socket through the first pluggable connector, and the mains power socket is connected to the mains power. The generator input socket is detachably connected to the fuel generator via the second pluggable connector.

3. The energy storage power supply according to any one of claims 2, characterized in that, The energy storage converter includes a bidirectional AC / DC converter and a controller connected to the bidirectional AC / DC converter. The switching circuit includes a first relay, a second relay, a third relay, and a fourth relay. The mains input terminal is connected to the bidirectional AC / DC converter in sequence through the second relay and the first relay. The load output terminal is connected to the bidirectional AC / DC converter in sequence through the third relay and the first relay. The generator input terminal is connected to the bidirectional AC / DC converter in sequence through the fourth relay, the third relay, and the first relay. The controller is connected to the first relay, the second relay, the third relay, and the fourth relay and is configured to control the on / off state of the first relay, the second relay, the third relay, and the fourth relay.

4. The energy storage power supply according to claim 3, characterized in that, The mains input socket includes a single-phase mains input socket and a split-phase mains input socket. The second relay includes a first moving contact and a first stationary contact. The first moving contact is connected to the first relay and the third relay. The first stationary contact includes a first L1 contact, a first L2 contact, a first neutral contact, and a first ground contact. The first L1 contact is connected to the L1 live wire of the single-phase mains input socket and the L1 live wire of the split-phase mains input socket. The first L2 contact is connected to the L2 live wire of the split-phase mains input socket. The first neutral contact is connected to the neutral wire of the single-phase mains input socket and the neutral wire of the split-phase mains input socket. The first ground contact is connected to the ground wire of the single-phase mains input socket and the ground wire of the split-phase mains input socket.

5. The energy storage power supply according to claim 4, characterized in that, The mains socket includes a single-phase mains socket and a split-phase mains socket. The first pluggable connector includes a single-phase input line and a split-phase input line. The single-phase input line includes a single-phase input plug and a single-phase output plug. The single-phase input plug is used for pluggable connection with the single-phase mains socket, and the single-phase output plug is used for pluggable connection with the single-phase mains input socket. The split-phase input line includes a split-phase input plug and a split-phase output plug. The split-phase input plug is used for pluggable connection with the split-phase mains socket, and the split-phase output plug is used for pluggable connection with the split-phase mains input socket.

6. The energy storage power supply according to claim 5, characterized in that, The maximum overcurrent value of the single-phase mains input socket and the single-phase input line is 30A, and the maximum overcurrent value of the split-phase mains input socket and the split-phase input line is 50A, 80A, 100, 120A, 150A or 200A.

7. The energy storage power supply according to claim 3, characterized in that, The load output socket includes a single-phase output socket and a split-phase output socket. The third relay includes a second moving contact and a second stationary contact. The second stationary contact is connected to the first relay and the second relay respectively. The second moving contact includes a second L1 contact, a second L2 contact, a second neutral contact, and a second ground contact. The second L1 contact is connected to the L1 live wire of the single-phase output socket and the L1 live wire of the split-phase output socket respectively. The second L2 contact is connected to the L2 live wire of the split-phase output socket respectively. The second neutral contact is connected to the neutral wire of the single-phase output socket and the neutral wire of the split-phase output socket respectively. The second ground contact is connected to the ground wire of the single-phase output socket and the ground wire of the split-phase output socket respectively.

8. The energy storage power supply according to claim 3, characterized in that, The generator input socket includes a single-phase generator socket and a split-phase generator socket. The fourth relay includes a third moving contact and a third stationary contact. The third stationary contact is connected to the third relay. The third moving contact includes a third L1 contact, a third L2 contact, a third neutral contact, and a third ground contact. The third L1 contact is connected to the live wire of the single-phase generator socket and the L1 live wire of the split-phase generator socket, respectively. The third L2 contact is connected to the L2 live wire of the split-phase generator socket, respectively. The third neutral contact is connected to the neutral wire of the single-phase generator socket and the neutral wire of the split-phase generator socket, respectively. The third ground contact is connected to the ground wire of the single-phase generator socket and the ground wire of the split-phase generator socket, respectively.

9. The energy storage power supply according to claim 3, characterized in that, The controller is also configured to, in the event of an abnormal mains voltage, control the energy storage power supply to a voltage source mode if the fuel generator has not started, and control the energy storage power supply to a current source mode if the fuel generator has started.

10. The energy storage power supply according to claim 9, characterized in that, The controller is also configured to, in the event of an abnormal mains voltage, if the fuel generator has been started, acquire the voltage phase, amplitude, and frequency of the fuel generator and control the phase difference between the output voltage of the bidirectional AC / DC converter and the voltage of the fuel generator to not exceed ±2°, the amplitude difference between the output voltage of the bidirectional AC / DC converter and the voltage of the fuel generator to not exceed ±10%, and the frequency difference between the output voltage of the bidirectional AC / DC converter and the voltage of the fuel generator to not exceed ±0.5Hz.

11. The energy storage power supply according to claim 3, characterized in that, The controller is also configured to, when the mains voltage is normal, control the transfer switch circuit to connect the mains input terminal to the load output terminal, and / or control the transfer switch circuit to connect the energy storage converter terminal to the load output terminal.

12. The energy storage power supply according to claim 11, characterized in that, The controller is also configured to control the energy storage power source to a current source mode when the mains power is available.

13. The energy storage power supply according to claim 12, characterized in that, The controller is further configured to acquire the voltage phase, amplitude, and frequency of the mains power and control the phase difference between the output voltage of the bidirectional AC / DC converter and the voltage of the mains power to not exceed ±2°, the amplitude difference between the output voltage of the bidirectional AC / DC converter and the voltage of the mains power to not exceed ±10%, and the frequency difference between the output voltage of the bidirectional AC / DC converter and the voltage of the mains power to not exceed ±0.5Hz.

14. The energy storage power supply according to claim 11, characterized in that, The controller is further configured to, in the event of an abnormal mains voltage or the fulfillment of a first predetermined condition, control the first relay and the third relay to close, and the second relay to open, wherein the first predetermined condition includes the current time being during the peak power consumption period of the mains and the SOC of the battery pack being greater than or equal to a first preset value.

15. The energy storage power supply according to claim 11, characterized in that, The controller is further configured to, under a second predetermined condition, control the first relay, the second relay, and the third relay to close, so that the battery pack and the mains power supply simultaneously supply power to the AC load. The second predetermined condition includes that the current time is during the peak power consumption period of the mains power and the SOC of the battery pack is greater than a second preset value and less than the first preset value.

16. The energy storage power supply according to claim 11, characterized in that, The controller is also configured to, when the current time is during a low-consumption period of the mains power, control the first relay, the second relay, and the third relay to close, so that the mains power simultaneously supplies power to the battery pack and the AC load.

17. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply also includes a third pluggable connector, and the load output socket is connected to a backup power device via the third pluggable connector. The backup power device is connected to at least one of the AC loads.

18. The energy storage power supply according to claim 17, characterized in that, The backup power device includes a manual transfer switch backup power device, and the load output socket is pluggably connected to the power receiving socket of the manual transfer switch backup power device via a third pluggable connector.

19. The energy storage power supply according to claim 1, characterized in that, The maximum overcurrent value of the mains power input socket is 30A, 50A, 80A, 100A, 150A or 200A; The maximum overcurrent value of the switching circuit is 30A, 50A, 80A, 100A, 150A or 200A; The maximum overcurrent value of the load output socket is 30A, 50A, 80A, 100A, 150A or 200A; The maximum overcurrent value of the generator input socket is 30A, 50A, 80A, 100A, 150A or 200A.

20. The energy storage power supply according to claim 1, characterized in that, The energy storage power supply includes a socket panel, on which multiple AC sockets are provided.

21. The energy storage power supply according to claim 1, characterized in that, The energy storage power source includes wheels, and the housing is mounted on the wheels.

22. A power supply method for the energy storage power supply according to any one of claims 1-21, characterized in that, The energy storage power supply includes: a housing, an AC power input socket, a generator input socket, and a load output socket disposed on the housing, a battery pack disposed within the housing, an energy storage converter, and a transfer switch circuit; the AC power input socket is used to connect to AC power, the generator input socket is used to connect to a fuel generator, and the load output socket is used to connect to an AC load; the energy storage converter includes a bidirectional AC / DC converter and a converter controller connected thereto; the transfer switch circuit includes an AC power input terminal, an energy storage converter terminal, a generator input terminal, and a load output terminal; the AC power input terminal is connected to the AC power input socket, the energy storage converter terminal is connected to the battery pack through the bidirectional AC / DC converter, the generator input terminal is connected to the generator socket, and the load output terminal is connected to the load output socket; the transfer switch circuit is used to control the on / off connection between the ports of the AC power input terminal, the energy storage converter terminal, the generator input terminal, and the load output terminal; the method includes: When the mains power input terminal is abnormal, the SOC of the battery pack is obtained; If the SOC of the battery pack is greater than or equal to a first preset value, the switching circuit is controlled to connect the energy storage converter terminal and the load output terminal, so that the DC power of the battery pack is converted into AC power by the bidirectional AC-DC converter and then supplied to the AC load. If the SOC of the battery pack is less than the first preset value, the fuel generator is started, and the transfer switch circuit is connected to the generator input terminal and the load output terminal, so that the AC power output by the fuel generator supplies power to the AC load through the generator input socket and the load output socket.

23. The power supply method according to claim 22, characterized in that, Controlling the start of the fuel generator and controlling the transfer switch circuit to connect the generator input terminal and the load output terminal, so that the AC power output by the fuel generator supplies power to the AC load through the generator input socket and the load output socket, including: Obtain the startup status of the fuel generator; When the fuel generator starts successfully, the generator input terminal is connected to the load output terminal. If the fuel generator fails to start, the energy storage converter terminal remains connected to the load output terminal.

24. The power supply method according to claim 22, characterized in that, The method further includes: Obtain the power supply status of the mains input terminal; When the mains input terminal is de-energized, the generator input terminal remains connected to the load output terminal, or the energy storage converter terminal remains connected to the load output terminal. When there is power at the mains input terminal, the fuel generator is turned off and the generator input terminal is disconnected from the load output terminal. At the same time, the mains input terminal and the energy storage converter terminal are connected to the load output terminal.

25. A household load backup power system, characterized in that, include: The energy storage power source according to any one of claims 1-24; A fuel generator, wherein the fuel generator is connected to the fuel input socket; and A backup power device is connected to the load output socket and to at least one of the AC loads.

26. The household load backup power system according to claim 25, characterized in that, The backup power device includes a manual transfer switch backup power device, and the load output socket is connected to the power receiving socket of the manual transfer switch backup power device.

27. The household load backup power system according to claim 26, characterized in that, The manual transfer switch backup power device includes a power supply selection switch, which includes a backup power supply position. The power supply selection switch is configured to default to the backup power supply position so that the energy storage power supply is connected to the backup power device.

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