Fire-fighting energy storage control system capable of being started repeatedly

Abstract

The invention relates to the technical field of energy storage control, in particular to a fire-fighting energy storage control system capable of being started for multiple times, which comprises an energy storage direct current system, and a direct current circuit breaker and a DCDC module are sequentially arranged at the output end of the energy storage direct current system; an energy storage AC system; according to the fire-fighting energy storage control system capable of being started for multiple times, when the main power supply line is powered off, the energy storage system controller can control to start the standby battery system, so that the fire-fighting host can continuously work; a first inter-element connecting wire harness is arranged to perform voltage acquisition on the standby battery system, and data operation analysis of an energy storage system controller is matched to effectively control a normally open contact, so that the standby battery system is always full, and the reliability of fire-fighting power supply is improved; and when the normally closed contact and the normally open contact both break down, manual operation can be carried out through the manual self-holding button, so that the reliability of the fire extinguishing system during operation is improved.

Description

A fire-fighting energy storage control system that can be started multiple times Technical Field

[0001] This invention relates to the field of energy storage control technology, specifically to a fire-fighting energy storage control system that can be started multiple times. Background Technology

[0002] With social development and rising living standards, the diversity and complexity of electricity consumption patterns have significantly increased the pressure on traditional power systems, leading to higher demands for energy storage. Consequently, commercial and industrial energy storage devices have emerged. Over the past few years, energy storage equipment has undergone numerous iterations, resulting in increasingly stringent reliability requirements for auxiliary power supplies. Consequently, the technology of dual-power supply for auxiliary energy storage devices has matured. Generally, there are two methods for the internal DC 24V power supply of energy storage devices: Method 1, using a single AC / DC module; Method 2, using both AC / DC and DC / DC modules for simultaneous power supply. Under normal mains power conditions, the mains power supply takes priority; when the mains power fails or is under maintenance, the DC system power supply takes over.

[0003] However, in fire protection systems, the two power supply methods mentioned above can only guarantee the triggering of a fire-fighting sprinkler once. After the sprinkler is finished, the energy storage system will be completely powered off. Without power supply, the fire control panel and fire sensors cannot continuously monitor the environment after the fire is extinguished, and therefore cannot monitor the situation of fire re-ignition and carry out effective sprinkler fire extinguishing.

[0004] Furthermore, in a fire environment, the internal lithium battery system is highly susceptible to thermal runaway, which can lead to the release of large amounts of flammable gases. Therefore, in environments with lithium battery systems, there is a high probability of secondary or multiple reignitions after a fire is extinguished, reducing the reliability of the entire fire protection system. Thus, resolving the issue of continuous power supply to fire sensors and fire control panels after fire suppression systems have been implemented is urgently needed. Summary of the Invention

[0005] To address the aforementioned issues, a fire-fighting energy storage control system capable of multiple starts is provided. When the main power supply line fails, the energy storage system controller activates the backup battery system, allowing the fire control panel to continue operating. A component connection harness is installed to collect voltage data from the backup battery system, and this data, combined with the data analysis from the energy storage system controller, effectively controls the normally open contacts, ensuring the backup battery system is always fully charged, thus improving the reliability of fire-fighting power supply. Furthermore, in the event of a failure in both normally closed and normally open contacts, manual operation is possible via a self-holding button, further enhancing the reliability of the fire-fighting system operation.

[0006] To address the problems of existing technologies, this invention provides a fire-fighting energy storage control system capable of multiple starts, comprising: an energy storage DC system, the output of which is sequentially equipped with a DC circuit breaker and a DC-DC module; an energy storage AC system, the output of which is sequentially equipped with an AC circuit breaker and an AC-DC module; a fire alarm control panel, the input of which has two main power supply lines connected to the outputs of the DC-DC module and the AC-DC module respectively; and an energy storage system controller, disposed between the energy storage DC system, the energy storage AC system, and the fire alarm control panel, both of which have multiple current input terminals, and the current input terminals of the energy storage system controller and the fire alarm control panel are connected in parallel; the current input terminals of the energy storage system controller and the fire alarm control panel are also equipped with... A backup battery system capable of supplying power to both; the current input terminal of the backup battery system is connected to the main power supply line via a charging line, the charging line being equipped with a normally open contact controlled by the energy storage system controller; the current output terminal of the backup battery system is electrically connected to the current input terminals of the fire alarm control panel and the energy storage system controller via two parallel auxiliary power supply lines; the energy storage system controller has a built-in normally closed contact for controlling the switching between the main power supply line and the auxiliary power supply line of the fire alarm control panel; the energy storage system controller also has a built-in manual self-holding button connected in parallel with the normally closed contact; a component connection harness one is provided between the current input terminal and the current output terminal of the backup battery system and the energy storage system controller; a component connection harness two is provided between the energy storage system controller and the DC circuit breaker and the AC circuit breaker.

[0007] Preferably, the normally open contact is located between the connection node of the inter-component connection harness of the backup battery system input terminal and the connection node of the current input terminal of the energy storage system controller connected in parallel with the charging line.

[0008] Preferably, diodes are installed between the two main power supply lines to isolate the backflow interference between the power supply circuits of the DC-DC module and the A-DC module.

[0009] Preferably, the input terminals of the two diodes are respectively connected to the output terminals of the DC-DC module and the AC-DC module, and the output terminals of the two diodes are respectively connected to the two main power supply lines of the fire alarm control panel input terminal.

[0010] Preferably, the fire control panel has multiple output terminals, and each of the multiple output terminals is correspondingly equipped with a fire sensor and a fire extinguishing spray device. The input terminal of the fire sensor is electrically connected to the output terminal of the fire control panel. The logic verification process of the fire control panel includes the steps of cross-verification of the fire sensor signal and determination of the duration of the fire signal.

[0011] Preferably, the fire sensors include, but are not limited to, smoke sensors, temperature sensors, toxic gas detection sensors, and combustible gas detection sensors.

[0012] Preferably, the energy storage system controller presets the delay disconnection time of the DC circuit breaker and the AC circuit breaker through the matching controller software, and the delay time range is set to 1-10 seconds.

[0013] Preferably, the charging voltage setting value and undervoltage protection value of the backup battery system are adjusted by the energy storage system controller and supporting software; the manual self-holding button adopts a mechanical self-holding structure, which remains closed after being pressed to maintain emergency power supply.

[0014] Preferably, the energy storage system controller is selected from one or more of the following: BA controller, EMS energy management system, and BCU battery control unit; both the first and second inter-component connection harnesses are made of flame-retardant and high-temperature resistant materials, and each connection node is provided with an insulating protective structure.

[0015] Preferably, the input terminal of the DC circuit breaker is electrically connected to the output terminal of the energy storage DC system, and the output terminal of the DC circuit breaker is electrically connected to the input terminal of the DC-DC module; the input terminal of the AC circuit breaker is electrically connected to the output terminal of the energy storage AC system, and the output terminal of the AC circuit breaker is electrically connected to the input terminal of the AC-DC module.

[0016] The advantages of this invention compared to the prior art are: 1. When the main power supply line is cut off, the energy storage system controller will activate the backup battery system, so that the fire control panel can continue to work, avoiding the loophole that the DC circuit breaker and AC circuit breaker are disconnected after a thermal runaway event, which would prevent the monitoring and fire extinguishing support for fire re-ignition from being provided.

[0017] 2. Set up a pair of interconnecting wiring harnesses between components to collect voltage data from the backup battery system, and use this data in conjunction with the energy storage system controller to effectively control the normally open contacts, ensuring that the backup battery system is always fully charged, thereby improving the reliability of fire protection power supply.

[0018] 3. When both normally closed and normally open contacts fail, manual operation can be performed via the manual self-holding button, providing redundancy for the entire automatic power supply and automatic charging, and improving the reliability of the fire protection system during operation. Attached Figure Description

[0019] Figure 1 is a schematic diagram of a fire-fighting energy storage control system that can be started multiple times.

[0020] Figure 2 is a schematic diagram of the automatic charging logic of the backup battery system of a fire-fighting energy storage control system that can be started multiple times.

[0021] The diagram is labeled as follows: 1. Energy storage DC system; 1a. DC circuit breaker; 1b. DC-DC module; 2. Energy storage AC system; 2a. AC circuit breaker; 2b. AC-DC module; 3. Fire alarm control panel; 3a. Fire sensor; 3b. Fire extinguishing spray device; 4. Energy storage system controller; 4a. Normally closed contact; 4b. Manual self-holding button; 4c. Inter-component connection harness two; 5. Backup battery system; 5a. Inter-component connection harness one; 5b. Normally open contact; 6. Diode. Detailed Implementation

[0022] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0023] Referring to Figure 1, a fire-fighting energy storage control system that can be started multiple times includes: an energy storage DC system 1, wherein a DC circuit breaker 1a and a DC-DC module 1b are sequentially installed at the output end of the energy storage DC system 1.

[0024] It should be noted that the DC-DC module 1b is a DC-to-DC module, which can convert the energy storage DC system 1 into a DC voltage compatible with the fire alarm control panel 3, and features voltage stabilization, anti-interference, and high-efficiency conversion. The DC circuit breaker 1a is used to automatically disconnect power in the event of a thermal runaway event.

[0025] Referring to Figure 1, the energy storage AC system 2 has an AC circuit breaker 2a and an AC-CDC module 2b sequentially installed at its output end.

[0026] It should be noted that the AC-DC module 2b is an AC-to-DC module, which can convert the AC power in the energy storage AC system 2 into a stable DC power supply required by the fire protection system. At the same time, it can realize functions such as voltage regulation, filtering, and voltage stabilization to ensure the normal operation of DC electrical equipment such as the fire control panel 3.

[0027] Referring to Figure 1, the fire control panel 3 has two main power supply lines at its input terminal, which are respectively connected to the output terminals of the DC-DC module 1b and the A-DC module 2b.

[0028] It should be noted that during use, when the DC circuit breaker 1a and the AC circuit breaker 2a are closed, both the energy storage DC system 1 and the energy storage AC system 2 can supply power to the fire alarm control panel 3.

[0029] When the mains power is normal, the fire control panel 3 is powered by the ACDC module 2b circuit first. When the mains power is interrupted due to fault or maintenance, the fire control panel 3 is powered by the DCDC module 1b circuit.

[0030] Referring to Figure 1, the energy storage system controller 4 is located between the energy storage DC system 1, the energy storage AC system 2, and the fire alarm control panel 3. Both the energy storage system controller 4 and the fire alarm control panel 3 have multiple current input terminals, and the current input terminals of the energy storage system controller 4 and the fire alarm control panel 3 are connected in parallel.

[0031] It should be noted that when the DC circuit breaker 1a and the AC circuit breaker 2a are not disconnected, the energy storage system controller 4 can obtain operating power from the main power supply line.

[0032] Referring to Figures 1 and 2, the current input terminals of the energy storage system controller 4 and the fire alarm control panel 3 are also equipped with a backup battery system 5 that can supply power to both. The current input terminal of the backup battery system 5 is connected to the main power supply line through a charging line, and the charging line is equipped with a normally open contact 5b controlled by the energy storage system controller 4. The current output terminal of the backup battery system 5 is electrically connected to the current input terminals of the fire alarm control panel 3 and the energy storage system controller 4 respectively through two parallel auxiliary power supply lines.

[0033] It should be noted that the backup battery system 5 works in conjunction with the energy storage system controller 4. When the DC circuit breaker 1a and the AC circuit breaker 2a are disconnected, the backup battery system 5 can supply power to the energy storage system controller 4 and the fire alarm control panel 3.

[0034] Furthermore, before the DC circuit breaker 1a and the AC circuit breaker 2a are disconnected, and if the backup battery system 5 has insufficient power or does not meet the set standard of the energy storage system controller 4, the energy storage system controller 4 will control the normally open contact 5b to close, and the main power supply line will supplement the backup battery system 5 with power as a backup.

[0035] As shown in Figures 1 and 2, the energy storage system controller 4 has a normally closed contact 4a built in it to control the switching between the main power supply line and the auxiliary power supply line of the fire alarm host 3.

[0036] It should be noted that when the DC circuit breaker 1a and the AC circuit breaker 2a are disconnected, the energy storage system controller 4 will close the normally closed contact 4a, and the backup battery system 5 will connect to the power supply between itself and the fire control panel 3 to supply power to the fire control panel 3.

[0037] As shown in Figures 1 and 2, the energy storage system controller 4 also has a built-in manual self-holding button 4b connected in parallel with the normally closed contact 4a.

[0038] It should be noted that, in order to improve the power supply reliability of the fire start-up, a manual self-holding button 4b is configured. When the normally closed contact 4a becomes stuck or other faults occur, the manual self-holding button 4b can be manually closed to ensure the continuous power supply to the fire control panel 3 and the energy storage system controller 4, providing monitoring and fire extinguishing support for secondary or multiple fire re-ignition.

[0039] Referring to Figures 1 and 2, the backup battery system 5 is provided with an inter-component connection harness 5a between the current input terminal and the current output terminal and the energy storage system controller 4, and the energy storage system controller 4 is provided with an inter-component connection harness 4c between the DC circuit breaker 1a and the AC circuit breaker 2a.

[0040] It should be noted that, in order to prevent the backup battery system 5 from self-discharging due to prolonged inactivity, which could lead to power failure of the backup battery system 5, a connecting harness 5a is added to collect the voltage of the backup battery system 5.

[0041] After the collected voltage information is calculated by the internal system of the energy storage system controller 4, when the voltage of the backup battery system 5 is lower than the voltage set by the energy storage system controller 4, the energy storage system controller 4 will close the normally open contact 5b to connect the backup battery system 5 to the main power supply line and charge the backup battery system 5.

[0042] Once the voltage reaches the voltage value set by the energy storage system controller 4, the normally open contact 5b is disconnected, which ensures that the backup battery system 5 is always in a normal fully charged state.

[0043] It should be added that when the fire control panel 3 is performing fire extinguishing work, it will feed back the fire signal and action signal to the energy storage system controller 4. After receiving the fire feedback, the energy storage system controller 4 will delay disconnecting the DC circuit breaker 1a and the AC circuit breaker 2a in order to prevent the fire from affecting and spreading to the external power supply circuit. At that time, the two fire power supplies of the energy storage DC system 1 and the energy storage AC system 2 will be in a state of complete power failure.

[0044] Referring to Figures 1 and 2, the normally open contact 5b is located between the connection node of the inter-component connection harness 5a at the input terminal of the backup battery system 5 and the charging line, and the connection node of the current input terminal of the energy storage system controller 4 connected in parallel with the charging line.

[0045] It should be noted that when the normally open contact 5b is open, the main power supply line can supply power to the energy storage system controller 4.

[0046] As shown in Figure 1, diodes 6 are installed between the two main power supply lines to isolate the reverse interference between the power supply circuits of DC-DC module 1b and ACDC module 2b.

[0047] The input terminals of the two diodes 6 are respectively connected to the output terminals of the DC-DC module 1b and the AC-DC module 2b, and the output terminals of the two diodes 6 are respectively connected to the two main power supply lines of the input terminal of the fire alarm control panel 3.

[0048] It should be noted that diode 6 has unidirectional conduction characteristics, which can block the reverse current of the main power supply circuit, thereby completely isolating the two power supply circuits, avoiding mutual backflow interference, and ensuring smooth switching between the main and backup circuits.

[0049] Referring to Figure 1, the fire control panel 3 has multiple output terminals, and each of the multiple output terminals is equipped with a fire sensor 3a and a fire extinguishing spray device 3b. The input terminal of the fire sensor 3a is electrically connected to the output terminal of the fire control panel 3. The logic verification process of the fire control panel 3 includes the steps of cross-verification of the signals of the fire sensor 3a and determination of the duration of the fire signal.

[0050] It should be noted that the fire extinguishing spray device includes a fire gas cylinder, a fire control solenoid valve, and a fire sprinkler mechanism. The fire sprinkler mechanism is connected to the fire gas cylinder through a fire pipeline, and the fire control solenoid valve is installed on the fire pipeline.

[0051] When the fire sensor 3a collects fire information, it will transmit the fire information to the fire control panel 3. After the fire control panel 3 confirms that a fire has occurred through logic verification, it will control the activation of the fire control solenoid valve, open the fire pipeline, and guide the extinguishing gas or agent inside the fire cylinder from the fire pipeline to the nozzle of the fire sprinkler system to spray and extinguish the fire.

[0052] The fire sensor 3a includes, but is not limited to, smoke sensors, temperature sensors, toxic gas detection sensors, and combustible gas detection sensors.

[0053] Referring to Figure 1, the energy storage system controller 4 presets the delay disconnection time of DC circuit breaker 1a and AC circuit breaker 2a through the supporting controller software, and the delay time range is set to 1-10 seconds.

[0054] Referring to Figure 1, the charging voltage setting value and undervoltage protection value of the backup battery system 5 are adjusted by the energy storage system controller 4 and the supporting software; the manual self-holding button 4b adopts a mechanical self-holding structure, which remains closed after being pressed to maintain emergency power supply.

[0055] It should be noted that the rated charging voltage and undervoltage protection threshold of different specifications of backup batteries have inherent differences. By flexibly adjusting the parameters through the controller and software, there is no need to replace the hardware to adapt to different batteries. It can be compatible with a variety of backup battery specifications, reducing the cost and difficulty of selecting and replacing system components.

[0056] The software precisely sets the charging voltage to prevent overcharging and undervoltage protection to prevent over-discharging, fundamentally solving the problem of battery life degradation caused by self-discharge and unreasonable charging and discharging parameters, and ensuring that the battery remains in a healthy state for a long time.

[0057] The mechanical self-holding structure has the advantage of being able to be turned on with a single press. Once pressed, it can remain closed without the need for continuous manual holding, which solves the problem of panic at the fire scene and the inability to operate the button for a long time. At the same time, it simplifies the operation steps, allowing non-professionals to quickly switch on and off the emergency power supply.

[0058] The button's mechanical self-holding mechanism and the controller's built-in normally closed contact form a parallel redundant structure. Even in the event of controller failure, normally closed contact sticking or failing to close, or power failure in the control circuit, the button with the mechanical structure can still work independently, ensuring the backup power circuit is connected. This creates a dual guarantee of automatic priority for electrical control and manual backup for mechanical control, eliminating the risk of the backup power circuit failing to connect due to electrical control failure.

[0059] Furthermore, the mechanical self-holding mechanism relies on mechanical latches and springs to maintain the state, without complex circuits or software logic. Daily maintenance only requires a simple check of the button's reset status, eliminating the need for professional maintenance and making it suitable for the long-term operation and low-maintenance requirements of energy storage fire protection systems.

[0060] Referring to Figure 1, the energy storage system controller 4 is selected from one or more of the following: BA controller, EMS energy management system, and BCU battery control unit; the inter-component connection harness 5a and the inter-component connection harness 4c are both made of flame-retardant and high-temperature resistant materials, and each connection node is provided with an insulating protective structure.

[0061] It should be noted that the inter-component connection harness 5a and the inter-component connection harness 4c, as the core channels for system power transmission and control signal interaction, are the weakest links most vulnerable to damage under fire conditions. The flame-retardant and high-temperature resistant materials and the insulation protection structure of each connection node enhance the performance of the harness in terms of materials and structure, directly solving the technical pain point that the harness is easily ignited and short-circuited in high-temperature and open-flame environments, leading to signal or power transmission interruption.

[0062] Referring to Figure 1, the input terminal of the DC circuit breaker 1a is electrically connected to the output terminal of the energy storage DC system 1, and the output terminal of the DC circuit breaker 1a is electrically connected to the input terminal of the DC-DC module 1b; the input terminal of the AC circuit breaker 2a is electrically connected to the output terminal of the energy storage AC system 2, and the output terminal of the AC circuit breaker 2a is electrically connected to the input terminal of the AC-DC module 2b.

[0063] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A fire-fighting energy storage control system capable of multiple starts, characterized in that, include: A DC energy storage system (1) is provided with a DC circuit breaker (1a) and a DC-DC module (1b) in sequence at its output end; an AC energy storage system (2) is provided with an AC circuit breaker (2a) and an AC-DC module (2b) in sequence at its output end; a fire alarm control panel (3) is provided with two main power supply lines at its input end that are respectively connected to the output end of the DC-DC module (1b) and the output end of the AC-DC module (2b); an energy storage system controller (4) is provided between the DC energy storage system (1), the AC energy storage system (2), and the fire alarm control panel (3). Both the energy storage system controller (4) and the fire alarm control panel (3) have multiple current input terminals, and the current input terminals of the energy storage system controller (4) and the fire alarm control panel (3) are connected in parallel; the current input terminals of the energy storage system controller (4) and the fire alarm control panel (3) are also provided with a backup battery system that can supply power to both of them. 5); The current input terminal of the backup battery system (5) is connected to the main power supply line through a charging line, and the charging line is equipped with a normally open contact (5b) controlled by the energy storage system controller (4); The current output terminal of the backup battery system (5) is electrically connected to the current input terminal of the fire control panel (3) and the energy storage system controller (4) through two parallel auxiliary power supply lines; The energy storage system controller (4) is equipped with a normally closed contact (4a) for controlling the switching between the main power supply line and the auxiliary power supply line of the fire control panel (3); The energy storage system controller (4) is also equipped with a manual self-holding button (4b) connected in parallel with the normally closed contact (4a); The current input terminal and the current output terminal of the backup battery system (5) are both equipped with an inter-component connection harness one (5a) between the energy storage system controller (4) and the DC circuit breaker (1a) and the AC circuit breaker (2a), and an inter-component connection harness two (4c) is equipped between the energy storage system controller (4) and the DC circuit breaker (1a) and the AC circuit breaker (2a).

2. The fire-fighting energy storage control system capable of multiple starts according to claim 1, characterized in that, The normally open contact (5b) is located between the connection node of the inter-component connection harness (5a) of the backup battery system (5) and the charging line and the connection node of the current input terminal of the energy storage system controller (4) and the charging line in parallel.

3. The fire-fighting energy storage control system capable of multiple starts according to claim 1, characterized in that, A diode (6) is installed between the two main power supply lines to isolate the reverse interference between the power supply circuits of the DC-DC module (1b) and the A-DC module (2b).

4. A fire-fighting energy storage control system capable of multiple starts according to claim 3, characterized in that, The input terminals of the two diodes (6) are respectively connected to the output terminals of the DC-DC module (1b) and the A-DC module (2b), and the output terminals of the two diodes (6) are respectively connected to the two main power supply lines of the input terminal of the fire control panel (3).

5. A fire-fighting energy storage control system capable of multiple starts according to claim 4, characterized in that, The fire control panel (3) has multiple output terminals, and each of the multiple output terminals is equipped with a fire sensor (3a) and a fire extinguishing spray device (3b). The input terminal of the fire sensor (3a) is electrically connected to the output terminal of the fire control panel (3). The logic verification process of the fire control panel (3) includes the steps of cross-verification of the signal of the fire sensor (3a) and determination of the duration of the fire signal.

6. A fire-fighting energy storage control system capable of multiple starts according to claim 5, characterized in that, The fire sensors (3a) include, but are not limited to, smoke sensors, temperature sensors, toxic gas detection sensors and combustible gas detection sensors.

7. A fire-fighting energy storage control system capable of multiple starts according to claim 6, characterized in that, The energy storage system controller (4) presets the delay disconnection time of the DC circuit breaker (1a) and the AC circuit breaker (2a) through the matching controller software, and the delay time range is set to 1-10 seconds.

8. A fire-fighting energy storage control system capable of multiple starts according to claim 7, characterized in that, The charging voltage setting value and undervoltage protection value of the backup battery system (5) are adjusted by the energy storage system controller (4) and the supporting software; the manual self-holding button (4b) adopts a mechanical self-holding structure, which remains closed after being pressed to maintain emergency power supply.

9. A fire-fighting energy storage control system capable of multiple starts according to claim 8, characterized in that, The energy storage system controller (4) is selected from one or more of the BA controller, EMS energy management system, and BCU battery control unit; the first component connection harness (5a) and the second component connection harness (4c) are both made of flame-retardant and high-temperature resistant material, and each connection node is provided with an insulating protection structure.

10. A fire-fighting energy storage control system capable of multiple starts according to claim 4, characterized in that, The input terminal of the DC circuit breaker (1a) is electrically connected to the output terminal of the energy storage DC system (1), and the output terminal of the DC circuit breaker (1a) is electrically connected to the input terminal of the DC-DC module (1b); the input terminal of the AC circuit breaker (2a) is electrically connected to the output terminal of the energy storage AC system (2), and the output terminal of the AC circuit breaker (2a) is electrically connected to the input terminal of the AC-DC module (2b).

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