A mobile energy storage system

Abstract

The present invention provides a mobile energy storage system. The mobile energy storage system provided by the present invention includes a plurality of energy storage modules. Each energy storage module includes a battery pack, a DC converter, an inverter, and a control unit. The DC converter is used to convert the first DC voltage output by the battery pack into a second DC voltage to supply power to the control unit. The inverter is used to convert the first DC voltage output by the battery pack into a first AC voltage to supply power to an external load, and is also used to convert the voltage of the power grid into the input voltage of the battery pack. The control unit is used to control whether the battery pack outputs power, and is also used to send a startup signal, a paralleling signal, and a shutdown signal to the inverter. The inverter is also used to startup after receiving the startup signal, start working after receiving the paralleling signal, and shutdown after receiving the shutdown signal. The mobile energy storage system of the present invention simplifies the mobile energy storage system and reduces the cost of mobile energy storage.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and particularly to a mobile energy storage system. Background Art

[0002] With the aggravation of environmental pollution, the implementation of the energy conservation and emission reduction strategy, and the further requirements of society for power supply reliability, mobile energy storage has emerged. At the same time, as users' demands for the output power and battery capacity of mobile energy storage systems continue to increase, a single energy storage system can no longer meet users' requirements, while large-power mobile energy storage systems are large in volume and not flexible enough, and traditional cascaded mobile energy storage solutions are complex in system and high in cost. Summary of the Invention

[0003] The purpose of the present invention is to provide a mobile energy storage system to solve the technical problems of complex system and high cost in the prior art.

[0004] The technical solution of the present invention is as follows: A mobile energy storage system is provided, which includes a plurality of energy storage modules. Each energy storage module includes a battery pack, a DC converter, an inverter, and a control unit. The plurality of energy storage modules communicate in parallel through their respective control units and respective inverters.

[0005] The DC converter is used to convert the first DC voltage output by the battery pack into a second DC voltage to supply power to the control unit.

[0006] The inverter is used to convert the first DC voltage output by the battery pack into a first AC voltage to supply power to an external load, and is also used to convert the voltage of the power grid into the input voltage of the battery pack.

[0007] The control unit is used to control whether the battery pack outputs, and is also used to send a startup signal, a parallel operation signal, and a shutdown signal to the inverter. The inverter is also used to start up after receiving the startup signal, start working after receiving the parallel operation signal, and shut down after receiving the shutdown signal.

[0008] Further, each energy storage module further includes an IO module and an emergency stop switch connected to the IO module. The DC converter is further used to input the second DC voltage to the IO module. The IO module is used to send the lightning protection fault signal or the emergency stop signal to the control unit correspondingly after detecting a lightning protection fault signal or the emergency stop switch is closed. The control unit is further used to send a shutdown signal to the inverter after receiving the lightning protection fault signal or the emergency stop signal to control the inverter to shut down.

[0009] Further, the inverter is also configured to receive the electric energy generated by the photovoltaic panel, and supply power to the battery pack and the external load by using the electric energy generated by the photovoltaic panel.

[0010] Further, the energy storage module further includes a first switch, a second switch, and a third switch. The inverter is connected to the photovoltaic panel, the power grid, and the external load respectively through the first switch, the second switch, and the third switch.

[0011] Further, the energy storage module further includes a first lightning arrester and a second lightning arrester. The first lightning arrester is connected between the inverter and the power grid, and the second lightning arrester is connected between the inverter and the external load.

[0012] Further, the energy storage module further includes an operation lamp and a fault lamp. The IO module is respectively connected to the operation lamp and the fault lamp. The IO module is further configured to control the fault lamp to light up after detecting that the emergency stop switch is closed, and the IO module is further configured to control the fault lamp to light up after detecting the lightning protection fault signal corresponding to the first lightning arrester and / or the second lightning arrester.

[0013] Further, the control unit is an EMS intelligent screen, which is configured to display the fault information of the battery pack and the fault information of the inverter, and is further configured to monitor the real-time operation data of the inverter, the real-time operation data of the battery pack, the real-time output data of the photovoltaic panel, and the real-time load data of the external load, and is further configured to record the historical operation data of the inverter, the historical operation data of the battery pack, the historical output data of the photovoltaic panel, and the historical load data of the external load.

[0014] Further, the energy storage module further includes a combiner box, which is used to connect multiple battery packs in parallel.

[0015] Further, the energy storage module further includes a battery switch indication unit, which includes a first indicator light and a fourth switch. The first indicator light is connected to the output end of the DC converter, and the fourth switch is connected to the battery pack.

[0016] Further, the energy storage module further includes an inverter AC output indication unit, which includes a second indicator light and a fifth switch. The second indicator light and the fifth switch are respectively connected to the inverter.

[0017] The beneficial effects of the present invention are as follows: enabling parallel communication among the multiple energy storage modules through their respective control units and respective inverters; enabling the DC converter to convert the first DC voltage output by the battery pack into a second DC voltage to supply power to the control unit; enabling the inverter to convert the first DC voltage output by the battery pack into a first AC voltage to supply power to an external load and convert the voltage of the power grid into the input voltage of the battery pack; the control unit controlling whether the battery pack outputs, sending start-up signals, parallel connection signals, and shutdown signals to the inverter, and the inverter starting up after receiving the start-up signal, starting to work after receiving the parallel connection signal, and shutting down after receiving the shutdown signal; enabling at least one energy storage module to work, thereby realizing the cascade of mobile energy storage, simplifying the mobile energy storage system, and reducing the cost of mobile energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings in the following description are only a part of the embodiments of the present invention, rather than all the embodiments. For those of ordinary skill in the art, without creative efforts, other drawings obtained based on these drawings belong to the scope of protection of this application.

[0019] Figure 1 FIG. 1 is a schematic diagram of the first structure of the mobile energy storage system provided by an embodiment of the present invention;

[0020] Figure 2 FIG. 2 is a schematic diagram of the second structure of the mobile energy storage system provided by an embodiment of the present invention;

[0021] Figure 3 FIG. 3 is a schematic diagram of the structure of the energy storage module provided by an embodiment of the present invention.

[0022] The meanings of the reference numerals in the drawings are as follows:

[0023] 100 - energy storage module; 110 - battery pack; 120 - control unit; 130 - inverter; 140 - power grid; 140 - DC converter; 160 - photovoltaic panel; 170 - IO module; 180 - merging box; 190 - EMS intelligent screen. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As used herein, the mention of "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0027] In the description of the embodiments of the present invention, unless otherwise specified, " / " means "or". For example, A / B can mean A or B; the "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality of" means two or more than two, and other quantifiers should be understood similarly. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention. And without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0028] Figure 1 is the first structural schematic diagram of the mobile energy storage system provided by the present invention. It should be noted that if there are substantially the same results, the mobile energy storage system of the present invention is not limited to Figure 1 the structure shown. As Figure 1 shown, the mobile energy storage system includes a plurality of energy storage modules 100. The energy storage module 100 includes a battery pack 110, a DC converter 150, an inverter 130, and a control unit 120. The plurality of energy storage modules 100 perform parallel communication with each other through their respective control units 120 and their respective inverters 130.

[0029] The DC converter 150 is used to convert the first DC voltage output by the battery pack 110 into a second DC voltage to supply power to the control unit 120;

[0030] The inverter 130 is used to convert the first DC voltage output by the battery pack 110 into a first AC voltage to supply power to an external load, and is also used to convert the voltage of the power grid 140 into the input voltage of the battery pack 110;

[0031] The control unit 120 is used to control whether the battery pack 110 outputs, and is also used to send a start signal, a parallel operation signal, and a shutdown signal to the inverter 130. The inverter 130 is also used to turn on after receiving the start signal, start working after receiving the parallel operation signal, and shut down after receiving the shutdown signal.

[0032] It should be noted that the multiple energy storage modules 100 perform parallel operation communication corresponding to each other through their respective control units 120 and respective inverters 130, which may include that the control unit 120 of the first energy storage module performs parallel operation communication with the control unit 120 of the second energy storage module, the inverter 130 of the first energy storage module performs parallel operation communication with the inverter 130 of the second energy storage module, the control unit 120 of the second energy storage module performs parallel operation communication with the control unit 120 of the third energy storage module, the inverter 130 of the second energy storage module performs parallel operation communication with the inverter 130 of the third energy storage module, and so on. The control unit 120 of the (N - 1)th energy storage module performs parallel operation communication with the control unit 120 of the Nth energy storage module, and the inverter 130 of the (N - 1)th energy storage module performs parallel operation communication with the inverter 130 of the Nth energy storage module, where N is the total number of energy storage modules. Any one of the energy storage modules 100 can perform parallel operation communication with other energy storage modules 100.

[0033] The above inverter 130 is a PCS (Power Conversion System, energy storage converter) inverter 130, which is an AC-DC energy conversion device of the above mobile energy storage system, has a 4G module, can remotely monitor data, and can supply power to an external load by connecting the power grid 140 to the AC input end of the inverter 130, and can also charge the battery pack 110 (storage battery).

[0034] As an optional implementation manner, the inverter 130 is further used to receive the electric energy generated by the photovoltaic panel 160 and use the electric energy generated by the photovoltaic panel 160 to supply power to the battery pack 110 and the external load.

[0035] In a specific embodiment, a second structural schematic diagram of the mobile energy storage system is shown as Figure 2As shown, if the power grid 140 is not connected to the inverter 130, the electric energy generated by the photovoltaic panel 160 (photovoltaic module) alone can be used to supply power to the battery pack 110. The photovoltaic panel 160 and the battery pack 110 can also be used to supply power to an external load. When the photovoltaic panel 160 cannot generate electric energy or the generated electric energy is insufficient, and the power grid 140 is not connected to the inverter 130, the battery pack 110 supplies power to the external load alone.

[0036] As an alternative embodiment, the energy storage module 100 further includes a first switch, a second switch, and a third switch. The inverter 130 is connected to the photovoltaic panel 160, the power grid 140, and the external load through the first switch, the second switch, and the third switch, respectively.

[0037] In the embodiment of the present invention, the on / off of the inverter 130 with the photovoltaic panel 160, the power grid 140, and the external load can be controlled respectively through the first switch, the second switch, and the third switch, so as to realize power supply to the external load in one or more ways using the battery pack 110, the photovoltaic panel 160, and the power grid 140.

[0038] In a specific embodiment, the first switch, the second switch, and the third switch can all be air switches. The structural schematic diagram of the energy storage module 100 is as Figure 3 shown Figure 3 The air switches (air switches) connected to the photovoltaic panel 160 and the power grid 140 in are the first switch and the second switch respectively, and the rightmost air switch is the third switch, which is connected to the external load.

[0039] As an alternative embodiment, as Figure 3 shown, the energy storage module 100 further includes a first lightning arrester and a second lightning arrester. The first lightning arrester is connected between the inverter 130 and the power grid 140, and the second lightning arrester is connected between the inverter 130 and the external load.

[0040] In the embodiment of the present invention, by connecting the first lightning arrester between the inverter 130 and the power grid 140, and connecting the second lightning arrester between the inverter 130 and the external load, the inverter 130 is protected, and the safety of the mobile energy storage system is improved.

[0041] As an alternative embodiment, the energy storage module 100 further includes an IO module 170 and an emergency stop switch connected to the IO module 170. The DC converter 150 is further configured to input the second DC voltage to the IO module 170. The IO module 170 is configured to send the lightning protection fault signal or the emergency stop signal to the control unit 120 correspondingly after detecting the lightning protection fault signal or the emergency stop switch is closed. The control unit 120 is further configured to control the inverter 130 to shut down after receiving the lightning protection fault signal or the emergency stop signal.

[0042] In the embodiment of the present invention, after detecting the lightning protection fault signal or the emergency stop switch is closed, a lightning protection fault signal or an emergency stop signal is sent to the control unit 120. After receiving the lightning protection fault signal or the like, the control unit 120 sends a shutdown signal to the inverter 130 to control the inverter 130 to shut down, so as to protect the inverter 130 and improve the safety of the mobile energy storage system.

[0043] In some embodiments, the IO module 170 sends an emergency stop signal to the control unit 120 after detecting the lightning protection fault signal of the first lightning arrester and / or the second lightning arrester and the emergency stop switch is closed. The control unit 120 also sends a shutdown signal to the inverter 130 after receiving the emergency stop signal to control the inverter 130 to shut down.

[0044] As an alternative embodiment, the energy storage module 100 further includes an operation lamp and a fault lamp. The IO module 170 is respectively connected to the operation lamp and the fault lamp. The IO module 170 is further configured to control the fault lamp to light up after detecting that the emergency stop switch is closed. The IO module 170 is further configured to control the fault lamp to light up after detecting the lightning protection fault signal corresponding to the first lightning arrester and / or the second lightning arrester.

[0045] In a specific embodiment, as Figure 3 shown, the energy storage module 100 further includes an operation lamp (operation indicator lamp) and a fault lamp (fault indicator lamp). The IO module 170 is respectively connected to the operation lamp and the fault lamp. The IO module 170 can detect a lightning protection signal, that is, a lightning protection fault signal. When the energy storage module 100 has no fault, the IO module 170 controls the operation lamp to light up. When the energy storage module 100 has a fault, detects a lightning protection fault signal or receives an emergency stop signal, the IO module 170 controls the fault lamp to light up, and correspondingly sends the fault signal, the lightning protection fault signal or the emergency stop signal to the control unit 120. The control unit 120 can determine whether to cut off the power supply of the energy storage module 100 according to the fault level. Cutting off the power supply can be to turn off the inverter 130 and the battery pack 110.

[0046] As an alternative embodiment, the control unit 120 is an EMS intelligent screen 190, which is configured to display the fault information of the battery pack 110 and the fault information of the inverter 130, and is further configured to monitor the real-time operation data of the inverter, the real-time operation data of the battery pack, the real-time output data of the photovoltaic panel, and the real-time load data of the external load, and is also configured to record the historical operation data of the inverter, the historical operation data of the battery pack, the historical output data of the photovoltaic panel, and the historical load data of the external load.

[0047] In a specific embodiment, the EMS intelligent screen 190 can monitor and display the fault information of the battery pack 110 and the fault information of the inverter 130. The EMS intelligent screen 190 can monitor the battery pack 110 and the inverter 130, display fault information, save data, manage energy transmission, etc. The EMS intelligent screen 190 has local interface and web interface operations and has the OTA (Over-the-Air Technology) function.

[0048] In a specific embodiment, the real-time operation data of the inverter includes the real-time voltage and real-time current of the inverter. The real-time operation data of the battery pack includes the real-time voltage, real-time current, real-time SOC (State Of Charge), real-time power, real-time temperature of the single battery, and real-time voltage of the single battery of the battery pack. The real-time output data of the photovoltaic panel includes the real-time output voltage and real-time output current. The real-time load data of the external load includes the real-time voltage, real-time current, real-time frequency (voltage or current), and real-time power.

[0049] The historical operation data of the inverter includes the historical voltage and historical current of the inverter. The historical operation data of the battery pack includes the historical voltage, historical current, historical SOC (State Of Charge), historical power, historical temperature of the single battery, and historical voltage of the single battery of the battery pack. The historical output data of the photovoltaic panel includes the historical output voltage and historical output current. The historical load data of the external load includes the historical voltage, historical current, historical frequency (voltage or current), and historical power.

[0050] As an alternative embodiment, the energy storage module 100 further includes a merging box 180, which is configured to connect multiple battery packs 110 in parallel.

[0051] In a specific embodiment, as Figure 3 shown Figure 3In the figure, PACK is the battery pack 110, PACK 1 to PACK N respectively represent the 1st battery pack 110 to the Nth battery pack 110. After multiple battery packs 110 are connected in parallel through the merging box 180, the output end is connected to the input end of the inverter 130. Multiple battery packs 110 output through the inverter 130 from DC to AC. The DC-DC converter 150 is connected to the total positive and total negative poles of multiple battery packs 110. The DC-DC converter 150 can output a DC voltage of 24V or 12V to supply power to the control unit 120 and the IO module 170. The IO module 170 can be connected to the emergency stop switch, the fault lamp and the operation lamp.

[0052] As an alternative embodiment, the energy storage module 100 further includes a battery switch indication unit. The battery switch indication unit includes a first indicator lamp and a fourth switch. The first indicator lamp is connected to the output end of the DC-DC converter 150, and the fourth switch is connected to the battery pack 110.

[0053] It should be noted that after the fourth switch is turned on, the first indicator lamp lights up, indicating that the battery pack 110 starts to work. Figure 3 In the figure, the battery switch indicator lamp connected to the output end of the DC-DC converter 150 is the first indicator lamp, and the switch connected to the battery pack 110 is the fourth switch.

[0054] As an alternative embodiment, the energy storage module 100 further includes an inverter AC output indication unit. The inverter AC output indication unit includes a second indicator lamp and a fifth switch. The second indicator lamp and the fifth switch are respectively connected to the inverter 130.

[0055] In a specific embodiment, Figure 3 in the figure, the AC OUT indicator lamp (AC output indicator lamp) connected to the inverter 130 is the second indicator lamp, and the switch on the right side of the third switch and connected to the inverter 130 is the fifth switch. The EMS smart screen 190 (control unit 120) can be used to control the start of the inverter 130, or long-press the fifth switch button to close the fifth switch. When the inverter 130 starts, the operation lamp lights up, indicating that the inverter 130 has started. When the second indicator lamp lights up, it indicates that AC has been output, the output port of the inverter 130 is energized, and it can supply power to the outside normally.

[0056] In another specific embodiment, when the fifth switch is closed and then pressed again, the first indicator lamp, the second indicator lamp, the fault lamp and the operation lamp all go out, the DC is disconnected, the AC load and the AC input power supply are removed, and the power-down of the energy storage module 100 is completed.

[0057] In some embodiments, after the parallel connection wiring of multiple energy storage modules 100 is completed, the hardware parallel connection can be achieved. After different EMS intelligent screens 190 are powered on, parallel connection communication can be carried out through the parallel connection communication line to receive data from other EMS intelligent screens 190. Parallel connection communication can be carried out between different inverters 130 through the parallel connection communication line to obtain the status information of other inverters 130 (which can include operating status information, fault status information, etc.), and transmit the status information of other inverters 130 to the EMS intelligent screen 190 corresponding to the current inverter 130. The parallel connection communication line can be a CAN bus or a 485 communication bus. When parallel connection is required, the EMS intelligent screen 190 writes a parallel connection message to the inverter 130. After receiving the parallel connection message, the inverter 130 can monitor the inverter 130 information in another energy storage module 100 through the parallel connection communication line. The inverters 130 of different energy storage modules 100 are independently controlled by their respective EMS intelligent screens 190. When several energy storage modules 100 are required to supply power to a load simultaneously, the EMS intelligent screens 190 of these several energy storage modules 100 independently control their respective inverters 130 to supply power to the load.

[0058] The mobile energy storage system provided by the embodiment of the present invention enables parallel connection communication between the multiple energy storage modules 100 through their respective control units 120 and respective inverters 130; enables the DC converter 150 to convert the first DC voltage output by the battery pack 110 into a second DC voltage, and the second DC voltage powers the control unit 120; enables the inverter 130 to convert the first DC voltage output by the battery pack 110 into a first AC voltage, and the first AC voltage powers an external load and converts the voltage of the power grid 140 into the input voltage of the battery pack 110; the control unit 120 controls whether the battery pack 110 outputs, and sends a startup signal, a parallel connection signal, and a shutdown signal to the inverter 130. The inverter 130 powers on after receiving the startup signal, starts working after receiving the parallel connection signal, and powers off after receiving the shutdown signal; at least one energy storage module 100 can work, thereby realizing the cascade of mobile energy storage, simplifying the mobile energy storage system, and reducing the cost of mobile energy storage.

[0059] When powered by the mobile energy storage system provided by the embodiments of the present invention, there is no need to use various types of energy storage devices to adapt to different load requirements. The mobile energy storage system provided by the embodiments of the present invention uses a two-level architecture, namely the battery pack 110 and the management and control unit 120, which can realize the transmission of parallel operation status information. The system is simple and cost-saving. Each energy storage module 100 operates in parallel without interference. The inverter 130 and the control unit 120 can independently control the operation of their respective energy storage modules 100, and the use of another energy storage module 100 will not be affected by the failure of one energy storage module 100. After the parallel communication lines between the energy storage modules 100 are connected, the control units of the energy storage modules 100 respectively send parallel operation signals to the corresponding inverters. Through the parallel operation of the energy storage modules 100, various power requirements can be met, making mobile power supply more convenient. Moreover, both the control unit 120 and the inverter 130 have the OTA function, and the cloud platform monitors data, which is convenient to operate and has better safety. The control unit 120 and the inverter 130 can monitor the information of other energy storage modules 100 except themselves through parallel communication. The control unit 120 issues a parallel operation instruction to the inverter 130. After receiving the parallel operation instruction, the inverter 130 provides electrical energy for external loads.

[0060] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0061] The above embodiments only represent the preferred embodiments of the present application, and the description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. A mobile energy storage system, characterized in that, It includes multiple energy storage modules. Each energy storage module includes a battery pack, a DC converter, an inverter, a control unit, a first switch, a second switch, and a third switch. The multiple energy storage modules communicate in parallel through their respective control units and respective inverters. The inverter is connected to a photovoltaic panel, the power grid, and an external load through the first switch, the second switch, and the third switch respectively; The DC converter is used to convert the first DC voltage output by the battery pack into a second DC voltage to supply power to the control unit; The inverter is used to convert the first DC voltage output by the battery pack into a first AC voltage to supply power to the external load, and is also used to convert the voltage of the power grid into the input voltage of the battery pack. The inverter is also used to receive the electric energy generated by the photovoltaic panel and use the electric energy generated by the photovoltaic panel to supply power to the battery pack and the external load; The control unit is used to control whether the battery pack outputs, and is also used to send a startup signal, a parallel operation signal, and a shutdown signal to the inverter. The inverter is also used to start up after receiving the startup signal, start working after receiving the parallel operation signal, and shut down after receiving the shutdown signal; The control unit is an EMS intelligent screen. The EMS intelligent screen is used to display the fault information of the battery pack and the fault information of the inverter, and is also used to monitor the real-time operation data of the inverter, the real-time operation data of the battery pack, the real-time output data of the photovoltaic panel, and the real-time load data of the external load. It is also used to record the historical operation data of the inverter, the historical operation data of the battery pack, the historical output data of the photovoltaic panel, and the historical load data of the external load.

2. The mobile energy storage system according to claim 1, wherein The energy storage module further includes an IO module and an emergency stop switch connected to the IO module. The DC converter is also used to input the second DC voltage to the IO module. The IO module is used to send the lightning protection fault signal or the emergency stop signal to the control unit correspondingly after detecting the lightning protection fault signal or the closure of the emergency stop switch; The control unit is also used to send a shutdown signal to the inverter after receiving the lightning protection fault signal or the emergency stop signal to control the inverter to shut down.

3. The mobile energy storage system according to claim 1, wherein The energy storage module further includes a first lightning arrester and a second lightning arrester. The first lightning arrester is connected between the inverter and the power grid, and the second lightning arrester is connected between the inverter and the external load.

4. The mobile energy storage system according to claim 3, wherein The energy storage module further includes an operation lamp and a fault lamp. The IO module is respectively connected to the operation lamp and the fault lamp. The IO module is also used to control the fault lamp to light up after detecting the closure of the emergency stop switch. The IO module is also used to control the fault lamp to light up after detecting the lightning protection fault signal corresponding to the first lightning arrester and / or the second lightning arrester.

5. The mobile energy storage system according to claim 1, wherein The energy storage module further includes a merging box, and the merging box is used to connect multiple battery packs in parallel.

6. The mobile energy storage system according to claim 1, wherein The energy storage module further includes a battery switch indication unit, and the battery switch indication unit includes a first indicator light and a fourth switch. The first indicator light is connected to the output end of the DC converter, and the fourth switch is connected to the battery pack.

7. The mobile energy storage system according to claim 1, wherein The energy storage module further includes an inverter AC output indication unit, and the inverter AC output indication unit includes a second indicator light and a fifth switch. The second indicator light and the fifth switch are respectively connected to the inverter.

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