AC controller of energy storage system and energy storage system

Abstract

The invention relates to an alternating current controller of an energy storage system and the energy storage system. The alternating current controller comprises a detection control device and a power loop. Wherein the detection control equipment comprises a communication control module and an electrical parameter module; the communication control module is used for communicating with the energy storage system and controlling the electrical parameter module to collect electrical parameters of the energy storage system; the power circuit comprises a circuit on-off switch and a secondary power distribution sub-circuit; the loop on-off switch is used for controlling connection or disconnection between the power loop and the energy storage system; the secondary power distribution sub-loop comprises a UPS module and a switching power supply used for supplying power to the energy storage system. The UPS module is used for distributing power for the energy storage system; according to the invention, the problems that the structure and the installation process of the energy storage system are complex and the requirement of compact space of the industrial and commercial energy storage system cannot be met are solved, the integration level of the energy storage system is improved, the frame structure of the industrial and commercial energy storage system is simplified, and the production and assembly time is greatly shortened.

Description

Technical Field

[0001] The present application relates to the field of AC control, and in particular to an AC controller and an energy storage system. Background Art

[0002] With the continuous advancement of technology and the continuous expansion of the market, many places have large electricity demand and high electricity costs. By configuring energy storage systems, energy optimization and cost reduction can be achieved. The AC control part of the industrial and commercial energy storage system can realize the power conversion, monitoring and management of the AC side of the energy storage system, ensuring that the energy storage system can efficiently, stably and safely exchange power with the power grid or load, and plays a key role in the energy storage system.

[0003] At present, the AC control part of industrial and commercial energy storage systems is usually composed of multiple independent modules, such as molded case circuit breakers, secondary distribution circuits, EMS (Energy Management System) controllers, etc. These modules have different functions, such as protecting circuits, distributing electric energy, monitoring system operating status, and ensuring system safety. However, this decentralized design method leads to a complex system structure. Communication and control between modules require additional lines and interfaces, which not only fails to meet the compact space requirements of industrial and commercial energy storage systems, increases the difficulty of installation, but also increases the risk of system failure.

[0004] Currently, no effective solution has been proposed in the related technology on how to improve the integration of the AC control part and simplify the structure to make it easy to install and maintain. Summary of the invention

[0005] The embodiment of the present application provides an AC controller for an energy storage system, including a detection control device and a power circuit;

[0006] The detection and control device includes a communication control module and an electrical parameter module;

[0007] The communication control module is connected to the electrical parameter module and the energy storage system, and is used to communicate with the energy storage system and control the electrical parameter module to collect electrical parameters of the energy storage system;

[0008] The power circuit includes a circuit on-off switch and a secondary distribution sub-circuit;

[0009] The circuit on-off switch is used to control the conduction or disconnection between the power circuit and the energy storage system; the secondary power distribution circuit includes a UPS module and a switching power supply for powering the energy storage system; the UPS module is used to distribute power to the energy storage system; the switching power supply includes a first switching power supply and a second switching power supply.

[0010] In some of these embodiments, the secondary power distribution circuit further includes a UPS front-end circuit and a UPS back-end circuit;

[0011] The UPS front-end loop includes a first power module and a first switch power supply, which is connected to the front end of the UPS module and the loop on-off switch and is used to distribute power to the first power module;

[0012] The UPS back-end loop includes a second power module and a second switching power supply, which are connected to the back end of the UPS module and the second power module, and are used to distribute power to the output of the UPS module and the second power module.

[0013] In some of the embodiments, the secondary power distribution circuit is further provided with a power supply interface, and the power supply interface is used for selecting a UPS module, and the UPS module is used for switching power supply for the energy storage system.

[0014] In some of the embodiments, the detection and control device is further provided with a heat dissipation module;

[0015] The heat dissipation module includes a temperature sensor, a heat dissipation switch component and a heat dissipation fan;

[0016] The temperature sensor collects the temperature signal in the AC controller; the heat dissipation switch component is connected to the heat dissipation fan to control the start or shut down of the heat dissipation fan; the heat dissipation fan is used to dissipate the heat of the AC controller.

[0017] In some of these embodiments, the detection and control device is further provided with a fire protection module;

[0018] The fire fighting module includes a fire fighting controller and a fire fighting device; the fire fighting controller is connected to the energy storage system and is used to communicate with the energy storage system, and when an abnormality occurs in the energy storage system environment, controls the start or shut down of the fire fighting device.

[0019] In some embodiments, the power circuit is further provided with a surge protector, which is connected to the circuit on-off switch. When the power circuit generates a peak current or voltage, the surge protector shunts the power circuit.

[0020] In some embodiments, the electrical parameter module further includes a current sensor, and the current sensor is used for collecting the electrical parameters.

[0021] In some of the embodiments, the AC controller further includes a housing that accommodates the detection and control device and the power circuit; wherein the housing is installed in the energy storage system.

[0022] In some of the embodiments, the housing further has a built-in thermal aerosol fire extinguishing device.

[0023] In a second aspect, an embodiment of the present application provides an energy storage system, including an energy storage cabinet and an AC controller as described in the first aspect above.

[0024] Compared with the related art, the AC controller of the energy storage system provided in the embodiment of the present application includes a detection control device and a power circuit; the detection control device includes a communication control module and an electrical parameter module; the communication control module is connected to the electrical parameter module and the energy storage system, and is used to communicate with the energy storage system and control the electrical parameter module to collect the electrical parameters of the energy storage system; the power circuit includes a circuit on-off switch and a secondary distribution subcircuit; the circuit on-off switch is used to control the conduction or disconnection between the power circuit and the energy storage system; the secondary distribution subcircuit includes a UPS module and a switching power supply for supplying power to the energy storage system; the UPS module is used to distribute power to the energy storage system; the switching power supply includes a first switching power supply and a second switching power supply. Through the integrated design of each module, the functions of the AC power circuit, the secondary distribution circuit, the electrical parameter metering, the communication and control of each subsystem, etc. are integrated, which solves the problem that the structure and installation process of the energy storage system are complex and fail to meet the space compactness requirements of the industrial and commercial energy storage system, improves the integration of the energy storage system, simplifies the framework structure of the industrial and commercial energy storage system, and greatly shortens the production and assembly time.

[0025] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 is a structural diagram of an AC controller module according to an embodiment of the present application;

[0028] Figure 2 is a structural diagram of an AC controller system according to an embodiment of the present application;

[0029] Figure 3 is a spatial structure diagram of an AC controller according to an embodiment of the present application;

[0030] Figure 4 is a schematic diagram of the secondary power distribution principle according to an embodiment of the present application;

[0031] Figure 5is a front view of an AC controller according to an embodiment of the present application;

[0032] Figure 6 is a back view of an AC controller according to an embodiment of the present application;

[0033] Figure 7 is a side view of an AC controller according to an embodiment of the present application;

[0034] Figure 8 This is an appearance diagram of an AC controller according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the contents disclosed in the present application, some changes such as design, manufacturing or production based on the technical contents disclosed in the present application are only conventional technical means, and should not be understood as insufficient contents disclosed in the present application.

[0036] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0037] Unless otherwise defined, the technical terms or scientific terms involved in this application should be understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the" and the like involved in this application do not indicate a quantitative limitation, and may represent the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in this application are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in this application refers to greater than or equal to two. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships, for example, "A and / or B" can represent: A exists alone, A and B exist at the same time, and B exists alone. The terms "first", "second", "third" and the like involved in the present application are merely used to distinguish similar objects and do not represent a specific ordering of the objects.

[0038] This embodiment provides an AC controller for an energy storage system, such as Figure 1 , the AC controller of this embodiment includes a detection control device and a power circuit;

[0039] Detection and control equipment, including communication control module and electrical parameter module;

[0040] In some embodiments, for example, Figure 2The communication control module is a CMU module (Communication Management Unit), which connects the electrical parameter module and the energy storage system, and is used to communicate with the energy storage system and control the electrical parameter module to collect the electrical parameters of the energy storage system. The CMU module can communicate with the fire protection system, BMS system (Battery Management System) and other systems in real time through RS485 communication to obtain the real-time status of each subsystem. It can monitor the status of components such as molded case circuit breakers and lightning arresters through the DI interface (Digital Interface) to ensure the safety and stability of system operation. It can also control components such as status indicators and cooling fans through the DO interface (Digital Output). In addition, the communication control module can also integrate multiple communication interfaces such as RS232 interface and Ethernet interface to communicate with other devices. The electrical parameter module can include electrical components such as current transformers, AC fuses and digital power meters, so as to collect, record and upload electrical parameters such as current, voltage, charge / discharge power of the energy storage system to ensure the safety and stability of the energy storage system.

[0041] Power circuit, including circuit on-off switch and secondary distribution circuit;

[0042] The circuit on-off switch is used to control the conduction or disconnection between the power circuit and the energy storage system. For example, the circuit on-off switch can use a 4P molded case circuit breaker and a rotary handle to manually switch the disconnection and conduction states of the AC power circuit. When the lines and equipment in the distribution line are overloaded, short-circuited, or undervoltage occurs, the molded case circuit breaker can provide protection for the lines and equipment;

[0043] The secondary distribution subcircuit includes a UPS module and a switching power supply for powering the energy storage system;

[0044] UPS (Uninterruptible Power Supply) is an uninterruptible power supply system. The UPS module is used to distribute power to the energy storage system. When power outages, voltage fluctuations, frequency instability or waveform distortion occur, the UPS module can quickly switch to its internal reserve battery pack or other backup power source to continue to power the load equipment, thereby ensuring the normal operation of the equipment and protecting data from loss;

[0045] The switching power supply includes a first switching power supply and a second switching power supply. Figure 4The UPS module is connected to the switching power supply. The first switching power supply may include a 24V power supply-1, and the second switching power supply may include a 12V power supply and a 24V power supply-2. The UPS module can distribute power to each module of the energy storage system according to different conditions of the power-on circuit.

[0046] Through the above-mentioned settings, by centrally arranging the detection and control equipment and the power circuit in the AC controller, the secondary distribution circuit, electrical parameter measurement, communication and control of each subsystem and other functions are integrated, thereby improving the integration of the distribution and control parts of the energy storage system, and simplifying the framework structure of the industrial and commercial energy storage system. Compared with the background technology in which multiple independent modules are composed of the AC control part, each module is responsible for different functions such as protecting the circuit, distributing electric energy, monitoring the operating status of the system, etc., the present application greatly improves the overall substitutability of the AC control part, which not only reduces the production and assembly time, but also reduces the difficulty of subsequent maintenance.

[0047] This embodiment also provides an AC controller, wherein the secondary distribution sub-circuit further includes a UPS front-end circuit and a UPS back-end circuit; the UPS front-end circuit includes a first power module and a first switching power supply, connected to the front end of the UPS module and the circuit on-off switch, for distributing power to the first power module;

[0048] In some embodiments, such as Figure 4 , the first power module may include a liquid cooling system, a UPS module, a maintenance socket, etc., and the first switch power supply includes a 24V power supply-1 (PS1), wherein the 24V power supply-1 supplies power to the cooling system;

[0049] The UPS back-end loop includes a second power module and a second switch power supply, which is connected to the back end of the UPS module and the second power module, and is used to distribute power to the output of the UPS module and the second power module.

[0050] In some embodiments, such as Figure 4 The second power module may include a high-voltage box and spare terminals, etc. The second switch power supply includes a 12V power supply (PS2) and a 24V power supply-2 (PS3), wherein the 12V power supply is used to power the CMU module, and the 24V power supply-2 is used to power the fire protection module;

[0051] Figure 4 : is a schematic diagram of the secondary power distribution. In some embodiments, the secondary power distribution circuit may also include a miniature circuit breaker, a modular socket, a switching power supply and a matching power supply terminal. Figure 4 The specific connection is as follows: the front end of the UPS module is connected to the socket XS2, the miniature circuit breaker QF12, and then to the liquid cooling system, the 24V power supply-1 (PS1) and the maintenance socket XS1. The liquid cooling system is located in the communication part of the energy storage cabinet (see Figure 2), the front end of the liquid cooling system is connected to the miniature circuit breaker QF11, which is used to control the start and shut down of the liquid cooling system; the front end of the 24V power supply-1 is connected to the miniature circuit breaker QF13, which is used to control the start and shut down of the 24V power supply-1. The entire UPS front end circuit is connected to the miniature circuit breaker QF21 and the 220V AC power supply in turn. The rear end of the UPS module is connected to the high-voltage box, 12V power supply (PS2), 24V power supply-2 (PS3), and spare terminals. Among them, the high-voltage box is connected to the miniature circuit breaker QF14, and the miniature circuit breaker QF14 is used to control the start and shutdown of the high-voltage box; the 12V power supply is connected to the miniature circuit breaker QF15, and the miniature circuit breaker QF15 is used to control the start and shutdown of the 12V power supply; the 24V power supply-2 is connected to the miniature circuit breaker QF16, and the miniature circuit breaker QF16 is used to control the start and shutdown of the 24V power supply-2; the spare terminal is connected to the miniature circuit breaker QF17, and the miniature circuit breaker QF17 is used to control the start and shutdown of the spare terminal.

[0052] Through the design of the secondary power distribution circuit, power is supplied to the liquid cooling system, fire protection module, CMU module, etc. In some embodiments, the secondary power distribution circuit also uses multiple 1P miniature circuit breakers to independently protect and control each circuit, which not only realizes the power supply function, but also makes the control of each subsystem more refined.

[0053] In some of the embodiments, the secondary distribution electronic circuit is also provided with a power supply interface, which may include a modular socket and a through-board terminal. The UPS module has a large size and high heat generation, but has the characteristics of optional functions. By connecting the power supply interface to the UPS module, structural compatibility of the optional UPS module can be achieved, so that the product can select the UPS module according to project requirements without considering issues such as structural changes and module heat dissipation.

[0054] In some of the embodiments, the detection and control device is further provided with a heat dissipation module;

[0055] The heat dissipation module includes a temperature sensor, a heat dissipation switch component and a heat dissipation fan;

[0056] The temperature sensor collects the temperature signal in the AC controller and feeds it back to the CMU module. The CMU module is connected to the heat dissipation switch component and controls the state of the heat dissipation switch component based on the temperature signal. The heat dissipation switch component is connected to the heat dissipation fan to control the start or shut down of the heat dissipation fan. The heat dissipation fan is used to dissipate heat from the AC controller. For example, the heat dissipation switch component can use an intermediate relay. The temperature sensor monitors the temperature of the internal space of the AC controller. When the temperature of the monitoring area reaches the preset value, the temperature signal is fed back to the CMU module. The CMU module controls the intermediate relay to start, and the intermediate relay controls the heat dissipation fan to start, so as to achieve heat dissipation in the monitoring area. The heat dissipation module realizes temperature monitoring and heat dissipation control of the AC controller.

[0057] In some of these embodiments, the detection and control device is further provided with a fire protection module;

[0058] The fire protection module includes a fire protection controller and a fire extinguisher; the fire protection controller is connected to the energy storage system and is used to communicate with the energy storage system. When an abnormality occurs in the energy storage system environment, the fire protection controller controls the start or shut down of the fire extinguisher; for example, the fire protection controller can communicate with the composite detector in each PACK package through CAN communication (Controller Area Network) to realize real-time monitoring and analysis of the environment of each PACK package. When an abnormality occurs in the environment in the PACK package, warning information is sent and fire protection equipment is controlled according to the preset warning level. The fire protection module realizes real-time monitoring and analysis of fire-related environmental information and controls the use of fire protection equipment, ensuring the safety and stability of the operation of the energy storage system.

[0059] In some embodiments, the power circuit is also provided with a surge protector (i.e. Figure 2 The SPD in the circuit breaker QF1 is connected to the surge protector. When the electrical circuit suddenly generates a peak current or voltage due to external interference, the surge protector can conduct and shunt in a very short time, thereby realizing the surge protection function of the energy storage system against indirect lightning and direct lightning effects or other instantaneous overvoltages, avoiding damage to other equipment in the circuit caused by surges.

[0060] In some of the embodiments, for example, the electrical parameter module in the AC controller may also include electrical components such as current sensors, AC fuses, and digital power meters, which can collect, record, and transmit electrical parameters such as current, voltage, and charge / discharge power of the energy storage system, thereby cooperating with each module to enable the AC controller to operate normally.

[0061] In some embodiments, the AC controller further includes a housing containing the detection and control device and the power circuit; wherein the housing is installed in the energy storage system. Figure 8 The AC controller has a rectangular appearance, and the shell is made of plastic-sprayed aluminum-zinc plate.

[0062] In some embodiments, the housing is also equipped with a thermal aerosol fire extinguishing device. For example, the thermal aerosol fire extinguishing device is installed on the top cover of the AC controller, and the fuse spirally covers the top cover to achieve fire protection inside the AC controller.

[0063] In some of the embodiments, the energy storage system of the embodiments of the present application includes an energy storage cabinet and an AC controller as described in any of the above embodiments.

[0064] Figure 3 is a spatial structure diagram of an AC controller according to an embodiment of the present application, such as Figure 3 As shown, the circuit on-off switch 401 is overlapped on the inner side of the dynamic connector through a copper busbar to realize the connection between the incoming and outgoing lines of the AC power circuit; the surge protector 402 is led to the incoming side of the circuit on-off switch 401 through a wire to realize the surge protection function; secondary distribution sub-circuits are arranged in the 403 area, the top of the 404 area and the top of the 405 area to realize the distribution power supply function; a fire protection module is arranged at the bottom of the 404 area to realize the monitoring and fire protection functions; a CMU module is arranged at the bottom of the 405 area to realize the communication and control functions between the modules; electrical parameter modules are arranged on the right side of 401 and the right side of 403 to realize the collection, recording and uploading functions of electrical parameters; a heat dissipation module is arranged on the right side of the 402 area to realize the temperature monitoring and heat dissipation control functions.

[0065] Figure 5 , Figure 6 as well as Figure 7 It is a schematic diagram of the AC controller terminal blocks according to the embodiment of the present application, 406 is a front view of the AC controller, 407 is a back view of the AC controller, and 408 is a back view of the AC controller. Areas 406, 407, 408, etc. are all provided with electrical components such as modular sockets and through-board terminals. These components constitute external connection interfaces such as UPS power supply interface and fire communication interface to realize the connection of power supply, communication, control and other functions of modules such as electrical parameter modules, heat dissipation modules and fire protection modules.

[0066] like Figure 2 As shown, the energy storage cabinet includes a power circuit part inside the energy storage cabinet, an AC controller, and an AC input part outside the energy storage cabinet.

[0067] The power circuit in the energy storage cabinet includes LUC liquid cooling unit, BMS battery management system, and PCS energy storage converter. The LUC liquid cooling unit uses liquid coolant (such as water, ethylene glycol, etc.) to absorb and take away the heat generated by the equipment, and then dissipates the heat into the environment to achieve the purpose of cooling, which is used to cool the energy storage cabinet. The BMS battery management system performs status monitoring, balancing control, thermal management, safety management, energy control, and data communication on the batteries in the energy storage cabinet, thereby ensuring the safe, reliable, and efficient operation of the battery system. The PCS energy storage converter consists of a bidirectional converter and a control unit, which can control the charging and discharging process of the battery and perform AC / DC conversion. When the AC controller requires the energy storage system to discharge, the PCS energy storage converter converts the DC power in the energy storage battery into AC power and outputs it to the AC controller; when the AC controller requires the energy storage system to charge, the PCS energy storage converter converts the AC power in the AC controller into DC power and stores it in the energy storage battery. The power circuit part in the energy storage cabinet is connected to the communication control module and the power circuit part in the AC controller.

[0068] The AC input part outside the energy storage cabinet includes a SW switch and an AC input part, wherein the SW switch is a network device used for forwarding electrical signals, which can provide an exclusive electrical signal path for any two network nodes connected to the switch. The SW switch is connected to the communication control module of the AC controller, so that when multiple modules are connected through the switch, they can independently transmit data without interfering with each other, so as to ensure the smoothness of the signal path of the communication control module; the AC input part is connected to the power circuit part of the AC controller, and AC power is input to the power circuit part. The AC power passes through the circuit on-off switch QF1 and the secondary distribution sub-circuit in turn, and then output to the PCS energy storage converter in the power circuit part of the energy storage cabinet, thereby realizing the charging and discharging process.

[0069] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0070] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0071] Those skilled in the art should understand that the technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An AC controller for an energy storage system, characterized in that: Including detection and control equipment and power circuit; The detection and control device includes a communication control module and an electrical parameter module; The communication control module is connected to the electrical parameter module and the energy storage system, and is used to communicate with the energy storage system and control the electrical parameter module to collect electrical parameters of the energy storage system; The power circuit includes a circuit on-off switch and a secondary distribution sub-circuit; The circuit on-off switch is used to control the conduction or disconnection between the power circuit and the energy storage system; the secondary power distribution circuit includes a UPS module and a switching power supply for powering the energy storage system; the UPS module is used to distribute power to the energy storage system; the switching power supply includes a first switching power supply and a second switching power supply.

2. The AC controller according to claim 1, characterized in that: The secondary power distribution circuit includes a UPS front-end circuit and a UPS back-end circuit; The UPS front-end loop includes a first power module and a first switch power supply, which is connected to the front end of the UPS module and the loop on-off switch and is used to distribute power to the first power module; The UPS back-end loop includes a second power module and a second switching power supply, which are connected to the back end of the UPS module and the second power module, and are used to distribute power to the output of the UPS module and the second power module.

3. The AC controller according to claim 1, characterized in that: The secondary distribution circuit is provided with a power supply interface, and the power supply interface is used for selecting a UPS module, and the UPS module is used for switching power supply for the energy storage system.

4. The AC controller according to claim 1, characterized in that: The detection and control device is provided with a heat dissipation module; The heat dissipation module includes a temperature sensor, a heat dissipation switch component and a heat dissipation fan; The temperature sensor collects the temperature signal in the AC controller; the heat dissipation switch component is connected to the heat dissipation fan to control the start or shut down of the heat dissipation fan; the heat dissipation fan is used to dissipate the heat of the AC controller.

5. The AC controller according to claim 1, characterized in that: The detection and control equipment is provided with a fire protection module; The fire fighting module includes a fire fighting controller and a fire fighting device; the fire fighting controller is connected to the energy storage system and is used to communicate with the energy storage system, and when an abnormality occurs in the energy storage system environment, controls the start or shut down of the fire fighting device.

6. The AC controller according to claim 1, characterized in that: The power circuit is provided with a surge protector, which is connected to the circuit on-off switch. When the power circuit generates a peak current or voltage, the surge protector shunts the power circuit.

7. The AC controller according to claim 1, characterized in that: The electrical parameter module includes a current sensor, and the current sensor is used for collecting the electrical parameters.

8. The AC controller according to claim 1, characterized in that: The AC controller also includes a housing that accommodates the detection and control device and the power circuit; wherein the housing is installed in the energy storage system.

9. The AC controller according to claim 8, characterized in that: The housing is also equipped with a thermal aerosol fire extinguishing device.

10. An energy storage system, characterized in that: It comprises an energy storage cabinet and an AC controller as claimed in any one of claims 1 to 9.

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