Power supply module

Abstract

The utility model provides a power supply module, comprising a commercial power input end used for accessing a commercial power supply; the two energy storage input ends are respectively used for being connected with an energy storage power supply; the power supply switching device comprises a normally-open first change-over switch and a normally-open second change-over switch, the input end of the normally-open first change-over switch is connected with the energy storage input ends, and the input end of the normally-open second change-over switch is connected with the mains supply input end; and the power supply switching device is configured to controllably switch the opening and closing states of the normally-open first change-over switch and the normally-open second change-over switch, and selectively obtain power from the mains supply input end or the energy storage input end. The utility model has the advantages that flexible power supply selection can be provided, and the reliability of power supply is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, and in particular to a power supply module. Background Technology

[0002] In the current field of residential energy storage technology, the most common approach is to use external energy storage devices. This approach requires a professional electrician to modify the existing indoor power distribution system to enable dual switching between the energy storage power source and the mains power source. This process is not only cumbersome but also requires specialized technical knowledge and experience, increasing the user's installation costs and difficulties.

[0003] Specifically, external energy storage devices need to be physically connected to the user's home electrical distribution system. This usually involves modifying the existing circuitry, such as adding new wiring or replacing or adding switches. These operations are not only time-consuming and labor-intensive, but may also pose a potential threat to the user's home electrical safety unless performed by a qualified professional electrician.

[0004] Furthermore, traditional residential energy storage devices also have certain limitations in power switching. Because they rely on changes to the external power distribution system, the switching between the energy storage power supply and the mains power supply is often not fast or flexible enough, making it difficult to meet users' high requirements for the stability and reliability of power supply. Utility Model Content

[0005] One objective of this invention is to provide flexible power supply options and enhance the reliability of power supply.

[0006] A further objective of this invention is to provide additional power input options to enhance power supply continuity.

[0007] Specifically, this utility model provides a power supply module, comprising:

[0008] AC power input terminal, used for connecting to AC power supply;

[0009] Two energy storage input terminals, one for connecting to an energy storage power source; and

[0010] A power switching device includes a normally open first switching switch and a normally open second switching switch. The input terminal of the normally open first switching switch is connected to each of the energy storage input terminals, and the input terminal of the normally open second switching switch is connected to the mains input terminal. The power switching device is configured to controllably switch the open and closed states of the normally open first switching switch and the normally open second switching switch to selectively obtain power from the mains input terminal or any of the energy storage input terminals.

[0011] Optionally, the power supply module also includes:

[0012] Two normally open input switches, each corresponding to one of the energy storage input terminals, are provided. The input terminals of the normally open input switches are connected to their respective energy storage input terminals, and their output terminals are connected to the input terminals of the normally open first switch.

[0013] Optionally, the power supply module also includes:

[0014] Two power supply output terminals are provided, each of which is simultaneously connected to the output terminals of the normally open first switching switch and the normally open second switching switch, and is used to supply power to different electrical loads respectively.

[0015] Optionally, the power supply module also includes:

[0016] Two normally open output switching switches, each corresponding to one of the power supply output terminals, with the input terminal of each normally open output switching switch connected to its corresponding power supply output terminal and the output terminal connected to its corresponding electrical load.

[0017] Optionally, the power supply module also includes:

[0018] The main control coil, connected between the live and neutral wires of the energy storage power source, is used to sense the power status of the energy storage power source. When the energy storage power source is powered, the main control coil is energized; when the energy storage power source is de-energized, the main control coil is de-energized.

[0019] The control circuit is connected between the live wire and the neutral wire of the energy storage power supply, and is used to control the opening and closing states of the normally open first switch and the normally open second switch according to the power supply status of the main control coil.

[0020] Optionally, the control loop includes:

[0021] The first control circuit includes a normally open main control switch, a normally closed second control switch, and the first control coil connected in series; and

[0022] The second control loop is connected in parallel with the first control loop, and includes a normally closed main control switch, a normally closed first control switch and the second control coil connected in series.

[0023] The main control coil simultaneously controls the opening and closing actions of the normally open main control switch and the normally closed main control switch.

[0024] The first control coil simultaneously controls the opening and closing actions of the normally closed first control switch, the normally open input switching switch, and the normally open first switching switch;

[0025] The second control coil simultaneously controls the opening and closing actions of the normally closed second control switch and the normally open second switching switch.

[0026] Optionally, the power supply module also includes:

[0027] The backup input terminal has one end connected to both of the power supply output terminals and the other end connected to an external generator. It is configured to obtain power from the external generator and supply the obtained power to the electrical load through the two power supply output terminals respectively.

[0028] Optionally, the power supply module also includes:

[0029] The emergency device has multiple normally closed emergency switches, which are respectively installed between each of the energy storage input terminals and the input terminal of the normally open first switching switch, and between the mains power input terminal and the input terminal of the normally open second switching switch, for controlled simultaneous disconnection to cut off the power supply of the mains power source and the energy storage power source.

[0030] Optionally, the power supply module also includes:

[0031] The third control circuit is connected between the live wire and the neutral wire of the energy storage power supply. It includes a normally open emergency switch and an emergency control coil connected in series. The normally open emergency switch is configured to close in a controlled manner, so that the emergency control coil is energized and triggers each normally closed emergency switch to open automatically.

[0032] Optionally, the power supply module also includes:

[0033] Two inverters, each corresponding to one of the energy storage input terminals, are used to convert the DC power supply of the energy storage power supply into AC power supply. The input terminal of each inverter is connected to the energy storage power supply, and the output terminal is connected to its corresponding energy storage input terminal.

[0034] This utility model's power supply module, equipped with a mains input terminal and two energy storage input terminals, allows users to flexibly select a power source from either the mains input terminal or the two energy storage input terminals. The power switching device includes a normally open first switching switch and a normally open second switching switch. The input terminal of the normally open first switching switch is connected to each energy storage input terminal, and the input terminal of the normally open second switching switch is connected to the mains input terminal. Thus, by controlling the power switching device to close the normally open first switching switch and open the normally open second switching switch, power can be connected through either energy storage input terminal; conversely, opening the normally open first switching switch and closing the normally open second switching switch allows power to be connected through the mains input terminal. Compared to traditional energy storage devices that require modifications to the indoor power distribution system, this utility model's power supply module has a simpler design, eliminating the need for complex modifications to the existing circuitry. This not only reduces installation costs but also simplifies maintenance procedures.

[0035] Furthermore, the power supply module of this invention is equipped with a backup input terminal. One end of the backup input terminal is connected to both power output terminals simultaneously, and the other end is used to connect to an external generator. Therefore, when both the mains input terminal and the two energy storage input terminals fail, the backup input terminal can quickly connect to the power supply through the external generator, ensuring continuous power supply to the electrical load. This is particularly important for critical loads, as it can avoid losses or risks caused by power outages. By adding a backup input terminal, a redundant design for power input is achieved. Even if the mains power supply and energy storage power supply fail, operation can continue through the power supplied by the external generator, improving the overall power supply reliability.

[0036] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 This is a schematic diagram of a power supply device according to an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of an energy storage power supply control circuit according to an embodiment of the present invention.

[0040] Figure label:

[0041] 1. Controller; 2. Communication board; 10. Mains input terminal; 11. Energy storage input terminal; 21. Normally open first changeover switch; 22. Normally open second changeover switch; 23. Normally open input changeover switch; 24. Normally open output changeover switch; 30. Power supply output terminal; 41. Main control coil; 42. Normally open main control switch; 43. Normally closed second control switch; 44. First control coil; 45. Normally closed main control switch; 46. Normally closed first control switch; 47. Second control coil; 50. Backup input terminal; 61. Normally closed emergency switch; 62. Normally open emergency switch; 63. Emergency control coil; 70. Control input terminal; 81. Grounding wire; 82. Protector; 91. First circuit breaker; 92. Second circuit breaker; 93. Third circuit breaker. Detailed Implementation

[0042] Reference will now be made in detail to embodiments of the present invention, one or more of which are illustrated in the accompanying drawings. The various embodiments provided are intended to explain the present invention and not to limit it. In fact, various modifications and variations to the present invention will be apparent to those skilled in the art without departing from the scope or spirit of the invention. For example, a feature illustrated or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, the present invention is intended to cover such modifications and variations within the scope of the appended claims and their equivalents.

[0043] The following reference Figures 1 to 2 This description refers to the power supply module of an embodiment of the present invention. The terms "inner," "outer," "upper," "lower," "top," "bottom," "lateral," and "longitudinal," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for ease of description and simplification. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. To illustrate the structure of the device, some of the accompanying drawings of the present invention are shown in perspective.

[0044] In the description of this embodiment, it should be understood that the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0045] In the description of this embodiment, the terms "one embodiment," "some embodiments," "some examples," "one example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. 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.

[0046] Figure 1 This is a schematic diagram of a power supply device according to an embodiment of the present invention. Figure 2 This is a schematic diagram of an energy storage power supply control circuit according to an embodiment of the present invention.

[0047] like Figures 1 to 2As shown, the power supply module includes a mains input terminal 10, two energy storage input terminals 11, and a power switching device. The mains input terminal 10 is used to connect to a mains power source, and the two energy storage input terminals 11 are used to connect to energy storage power sources. The power switching device includes a normally open first switching switch 21 and a normally open second switching switch 22. The input terminal of the normally open first switching switch 21 is connected to each energy storage input terminal 11, and the input terminal of the normally open second switching switch 22 is connected to the mains input terminal 10. The power switching device is configured to controllably switch the open and closed states of the normally open first switching switch 21 and the normally open second switching switch 22 to selectively obtain power from the mains input terminal 10 or the energy storage input terminal 11.

[0048] This utility model's power supply module, equipped with a mains input terminal 10 and two energy storage input terminals 11, allows users to flexibly select a power source from either the mains input terminal 10 or the two energy storage input terminals 11. The power switching device includes a normally open first switching switch 21 and a normally open second switching switch 22. The input terminal of the normally open first switching switch 21 is connected to each energy storage input terminal 11, and the input terminal of the normally open second switching switch 22 is connected to the mains input terminal 10. Thus, by controlling the power switching device, closing the normally open first switching switch 21 and opening the normally open second switching switch 22 allows power to be connected via any energy storage input terminal 11; conversely, opening the normally open first switching switch 21 and closing the normally open second switching switch 22 allows power to be connected via the mains input terminal 10. Compared to traditional energy storage devices that require modifications to the indoor power distribution system, this utility model's power supply module has a simpler design, eliminating the need for complex modifications to the existing circuitry. This not only reduces installation costs but also simplifies maintenance procedures.

[0049] In this embodiment, the two energy storage input terminals 11 can be independently connected to two identical energy storage power sources. When one energy storage power source fails, the other can continue to supply power, thus ensuring the continuity and stability of power supply. This is particularly important for applications requiring highly reliable power supply.

[0050] In an optional embodiment, the power supply module further includes two inverters, each corresponding to an energy storage input terminal 11. The input terminal of each inverter is connected to the energy storage power supply, and the output terminal is connected to its corresponding energy storage input terminal 11, for converting the DC power of the energy storage power supply into AC power.

[0051] In other words, each energy storage power source undergoes DC-to-AC conversion via an independent inverter, ensuring the independence and stability of the power conversion process. Even if one inverter or energy storage power source fails, the other inverter and its corresponding energy storage power source can continue to operate, providing power to the load.

[0052] Because the power supply module uses two independent inverters and energy storage power supplies, the power supply strategy can be flexibly adjusted according to load demand or power status. For example, when the load is light, one inverter and its corresponding energy storage power supply can be used to save energy; when the load is heavy or higher reliability is required, two inverters and their corresponding energy storage power supplies can be used simultaneously.

[0053] In an optional embodiment, the power supply module further includes two normally open input switching switches 23, each corresponding to an energy storage input terminal 11. The input terminals of the normally open input switching switches 23 are all connected to their respective corresponding energy storage input terminals 11, and the output terminals are all connected to the input terminals of the normally open first switching switch 21. The opening and closing actions of the two normally open input switching switches 23 and the normally open first switching switch 21 are all synchronously controlled by the first control coil 44.

[0054] In other words, when the first control coil 44 is energized, both normally open input switching switches 23 and the normally open first switching switch 21 close simultaneously. At this time, the energy storage power supply provides power to the electrical load simultaneously through its corresponding normally open input switching switch 23 and normally open first switching switch 21.

[0055] By introducing a normally open input switching switch 23, a more flexible power switching function is achieved. When one energy storage power source fails or is low on power, it can quickly switch to another energy storage power source to ensure continuous power supply to the electrical load.

[0056] The operation of the two normally open input switching switches 23 and the normally open first switching switch 21 is synchronously controlled by the first control coil 44, which greatly simplifies the system's control logic. Only the energization and de-energization of the first control coil 44 need to be controlled to achieve synchronous opening and closing of all switches, reducing system complexity and operational difficulty.

[0057] In an optional embodiment, the power supply module further includes two power supply output terminals 30, each of which is simultaneously connected to the output terminals of the normally open first switching switch 21 and the normally open second switching switch 22, and is used to supply power to different electrical loads respectively.

[0058] By adding two power output terminals 30, the power supply module can simultaneously provide power to two different electrical loads. This design meets diverse power needs, making the system more flexible and practical. The two power output terminals 30 are simultaneously connected to the output terminals of the normally open first switch 21 and the normally open second switch 22. This connection method ensures that the power output terminal 30 can receive power regardless of which switch is closed.

[0059] In an optional embodiment, the power supply module further includes two normally open output switching switches 24, each of which corresponds to a power supply output terminal 30. The input terminal of each normally open output switching switch 24 is connected to its corresponding power supply output terminal 30, and the output terminal is connected to its corresponding electrical load.

[0060] Once the normally open output switch 24 is closed, the power supply output terminal 30 can supply power to the corresponding electrical loads through the switch. This method allows the power supply module to distribute power to different electrical loads as needed, flexibly controlling which electrical loads receive power, and helps to turn specific electrical loads off or on when needed to save energy or avoid overload.

[0061] In an optional embodiment, the power supply module further includes a main control coil 41 and a control circuit. The main control coil 41 is connected between the live wire and the neutral wire of the energy storage power supply to sense the power status of the energy storage power supply. When the energy storage power supply is powered, the main control coil 41 is energized; when the energy storage power supply is de-energized, the main control coil 41 is de-energized. The control circuit, connected between the live wire and the neutral wire of the energy storage power supply, is used to control the opening and closing states of the normally open first switching switch 21 and the normally open second switching switch 22 according to the energization and de-energization status of the main control coil 41.

[0062] For example, when the main control coil 41 is energized, it indicates that the energy storage power source is powered. At this time, the control circuit controls the normally open first switching switch 21 to close and the normally open second switching switch 22 to open. Thus, when the energy storage power source is powered, it can be used preferentially for power supply; when the energy storage power source is de-energized or malfunctions, it can automatically switch to mains power supply. This design improves the reliability and stability of the system, providing strong support for the continuous operation of electrical loads.

[0063] In one optional embodiment, the control loop includes a first control loop and a second control loop. The first control loop includes a normally open main control switch 42, a normally closed second control switch 43, and a first control coil 44 connected in series. The second control loop is connected in parallel with the first control loop and includes a normally closed main control switch 45, a normally closed first control switch 46, and a second control coil 47 connected in series. The main control coil 41 simultaneously controls the opening and closing of the normally open main control switch 42 and the normally closed main control switch 45. The first control coil 44 simultaneously controls the opening and closing of the normally closed first control switch 46, the normally open input switching switch 23, and the normally open first switching switch 21. The second control coil 47 simultaneously controls the opening and closing of the normally closed second control switch 43 and the normally open second switching switch 22.

[0064] In an optional embodiment, the power supply module further includes a backup input terminal 50, one end of which is connected to two power output terminals 30 simultaneously, and the other end is used to connect to an external generator, configured to obtain power through the external generator and supply the obtained power to the electrical load through the two power output terminals 30 respectively.

[0065] When both the mains input terminal 10 and the two energy storage input terminals 11 fail, the backup input terminal 50 can quickly connect to the power supply through an external generator, ensuring continuous power supply to the electrical load. This is especially important for critical loads, as it can prevent losses or risks caused by power outages. By adding the backup input terminal 50, a redundant design for the power input is achieved. Even if the mains power supply and energy storage power supply fail, operation can continue through the power supplied by the external generator, improving overall power supply reliability.

[0066] In an optional embodiment, the power supply module further includes an emergency device having a plurality of normally closed emergency switches 61, which are respectively disposed between each energy storage input terminal 11 and the input terminal of the normally open first switching switch 21, and between the mains input terminal 10 and the input terminal of the normally open second switching switch 22, for controlled simultaneous disconnection to cut off the power supply of the mains power and the energy storage power.

[0067] The normally closed emergency switch 61 is closed under normal circumstances, ensuring a stable supply of mains power and energy storage power. However, in emergencies such as power failures, equipment overheating, short circuits, or other situations requiring immediate power disconnection to prevent damage or danger, these switches can be controlled to open simultaneously. This design allows for the rapid disconnection of all power sources, including mains power and energy storage power, effectively preventing equipment damage, fires, or other safety accidents that could result from continued current flow.

[0068] In addition, a normally closed emergency switch 61 can be added to the backup input terminal 50 and the two power output terminals 30. This normally closed emergency switch 61 and other normally closed emergency switches 61 can be opened simultaneously in a controlled manner to cut off the power supply of the external generator in an emergency.

[0069] In an optional embodiment, the power supply module further includes a third control circuit connected between the live wire and the neutral wire of the energy storage power supply. The third control circuit includes a normally open emergency switch 62 and an emergency control coil 63 connected in series. The normally open emergency switch 62 is configured to close in a controlled manner, so that the emergency control coil 63 is energized and triggers each normally closed emergency switch 61 to open automatically.

[0070] Under normal operating conditions, the energy storage power supply provides power to the electrical load, the normally open emergency switch 62 remains open, and the emergency control coil 63 is not energized. All normally closed emergency switches 61 remain closed, maintaining normal circuit connection. In an emergency, the operator presses the normally open emergency switch 62, energizing the emergency control coil 63 and triggering all normally closed emergency switches 61 to automatically open, thereby cutting off the input of the energy storage power supply and the mains power supply, preventing current from continuing to flow through potentially damaged circuits.

[0071] In an optional embodiment, the power supply module further includes a controller 1, a communication board 2, and a control input terminal 70. The communication board 2 is integrated on the controller 1. One end of the control input terminal 70 is connected to the controller 1 to receive control signals from the controller 1, and the other end is connected to two power supply output terminals 30 to transmit control signals to the output terminals of the power supply module, so as to realize the monitoring and adjustment of the power supply output.

[0072] In an optional embodiment, the power supply module may further include a grounding wire 81 and a protector 82. One end of the grounding wire 81 is connected between the mains input terminal 10 and the input terminal of the second switching switch, and the other end is connected to the ground. The protector 82 is connected in series with the grounding wire 81.

[0073] A first circuit breaker 91 is installed between the mains input terminal 10 and the input terminal of the normally open first switching switch 21; a second circuit breaker 92 is installed between the standby input terminal 50 and the two power output terminals 30; and a third circuit breaker 93 is installed between the control input terminal 70 and the two power output terminals 30.

[0074] When an abnormality occurs at the mains input terminal 10 (such as overload, short circuit, etc.), the first circuit breaker 91 can quickly disconnect the circuit to protect subsequent circuits and equipment from damage. When an abnormality occurs at the backup input terminal 50 or when it is necessary to switch back to the mains input, the second circuit breaker 92 can ensure safe isolation between the backup input and the power supply output. It also provides necessary protection during backup power supply. The third circuit breaker 93 is mainly used to protect the circuit between the control input terminal 70 and the power supply output terminal 30. When an abnormality occurs at the control input terminal 70 (such as control signal error, interference, etc.), it can disconnect the connection between the control signal and the power supply output terminal 30 to prevent unnecessary interference or damage to the power supply output terminal 30.

[0075] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A power supply module, characterized in that, include: AC power input terminal, used for connecting to AC power supply; Two energy storage input terminals are used to connect to the energy storage power supply; as well as A power switching device includes a normally open first switching switch and a normally open second switching switch. The input terminal of the normally open first switching switch is connected to each of the energy storage input terminals, and the input terminal of the normally open second switching switch is connected to the mains input terminal. The power switching device is configured to controllably switch the open and closed states of the normally open first switching switch and the normally open second switching switch to selectively obtain power from the mains input terminal or any of the energy storage input terminals.

2. The power supply module according to claim 1, characterized in that, Also includes: Two normally open input switches, each corresponding to one of the energy storage input terminals, are provided. The input terminals of the normally open input switches are connected to their respective energy storage input terminals, and their output terminals are connected to the input terminals of the normally open first switch.

3. The power supply module according to claim 2, characterized in that, Also includes: Two power supply output terminals are provided, each of which is simultaneously connected to the output terminals of the normally open first switching switch and the normally open second switching switch, and is used to supply power to different electrical loads respectively.

4. The power supply module according to claim 3, characterized in that, Also includes: Two normally open output switching switches, each corresponding to one of the power supply output terminals, with the input terminal of each normally open output switching switch connected to its corresponding power supply output terminal and the output terminal connected to its corresponding electrical load.

5. The power supply module according to claim 4, characterized in that, Also includes: The main control coil, connected between the live and neutral wires of the energy storage power source, is used to sense the power status of the energy storage power source. When the energy storage power source is powered, the main control coil is energized; when the energy storage power source is de-energized, the main control coil is de-energized. The control circuit is connected between the live wire and the neutral wire of the energy storage power supply, and is used to control the opening and closing states of the normally open first switch and the normally open second switch according to the power supply status of the main control coil.

6. The power supply module according to claim 5, characterized in that, The control loop includes: The first control circuit includes a normally open main control switch, a normally closed second control switch, and a first control coil connected in series; and The second control loop is connected in parallel with the first control loop, and includes a normally closed main control switch, a normally closed first control switch and a second control coil connected in series. The main control coil simultaneously controls the opening and closing actions of the normally open main control switch and the normally closed main control switch. The first control coil simultaneously controls the opening and closing actions of the normally closed first control switch, the normally open input switching switch, and the normally open first switching switch; The second control coil simultaneously controls the opening and closing actions of the normally closed second control switch and the normally open second switching switch.

7. The power supply module according to claim 3, characterized in that, Also includes: The backup input terminal has one end connected to both of the power supply output terminals and the other end connected to an external generator. It is configured to obtain power from the external generator and supply the obtained power to the electrical load through the two power supply output terminals respectively.

8. The power supply module according to claim 3, characterized in that, Also includes: The emergency device has multiple normally closed emergency switches, which are respectively installed between each of the energy storage input terminals and the input terminal of the normally open first switching switch, and between the mains power input terminal and the input terminal of the normally open second switching switch, for controlled simultaneous disconnection to cut off the power supply of the mains power source and the energy storage power source.

9. The power supply module according to claim 8, characterized in that, Also includes: The third control circuit is connected between the live wire and the neutral wire of the energy storage power supply. It includes a normally open emergency switch and an emergency control coil connected in series. The normally open emergency switch is configured to close in a controlled manner, so that the emergency control coil is energized and triggers each normally closed emergency switch to open automatically.

10. The power supply module according to claim 1, characterized in that, Also includes: Two inverters, each corresponding to one of the energy storage input terminals, are used to convert the DC power supply of the energy storage power supply into AC power supply. The input terminal of each inverter is connected to the energy storage power supply, and the output terminal is connected to its corresponding energy storage input terminal.

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