Energy storage device and energy storage system

Abstract

The utility model provides an energy storage device and an energy storage system, and relates to the energy storage equipment technical field, the energy storage device comprises a cabinet body, and an energy storage current transformer, a main control module, a battery management system, a distribution box and a battery module arranged in the cabinet body, the cabinet body comprises a cabinet door, the cabinet body is provided with an opening, the cabinet door is arranged at one side of the opening of the cabinet body, and the cabinet door is provided with an opening. The cabinet body is opened and closed; the main control module is integrated in the energy storage converter, the battery management system is arranged on the energy storage converter, the energy storage converter comprises a control panel, the control panel is arranged on one side of the energy storage converter, and the direction of the control panel faces the opening; the AC side and the DC side of the energy storage converter are respectively connected with the distribution box and the battery module. According to the energy storage device, the battery management system is designed on the control panel of the energy storage converter, so that the maintenance difficulty of the energy storage device is reduced, and the compatibility and the flexibility of the energy storage device are improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, specifically to an energy storage device and energy storage system. Background Technology

[0002] Commercial and industrial energy storage devices are a combination of equipment capable of storing electrical energy and releasing it when needed, primarily used to meet the power demands of industrial and commercial sectors. Existing commercial and industrial energy storage devices typically integrate the battery management system main control board, main positive and negative contactors, and pre-charge circuit within a main control box. These components connect to external devices and communicate via interfaces on the main control box panel, forming the core control part of the energy storage device.

[0003] As customers demand higher space utilization rates for energy storage devices, some manufacturers are integrating the energy storage converter and main control box within the device. However, the energy storage converter in these devices often integrates or is closely connected to the battery management system (BMS), making seamless switching impossible when replacing or replacing BMS components. Typically, the energy storage converter needs to be disassembled, the corresponding BMS removed, and all wiring replaced before being reinstalled in the energy storage unit. Therefore, existing energy storage devices suffer from low scalability and maintainability, requiring significant manpower and resources for maintenance, leading to increased maintenance costs and risks. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides an energy storage device and energy storage system, which effectively solves the problems of low scalability and maintainability of existing energy storage devices, and the need to invest more manpower and material resources during maintenance, resulting in increased maintenance costs and risks.

[0005] In a first aspect, this utility model provides an energy storage device, which includes a cabinet and an energy storage converter, a main control module, a battery management system, a power distribution box, and a battery module disposed within the cabinet, wherein:

[0006] The cabinet includes a cabinet door, the cabinet has an opening, and the cabinet door is located on one side of the opening of the cabinet to open and close the cabinet;

[0007] The main control module is integrated inside the energy storage converter, the battery management system is set on the energy storage converter, and the energy storage converter includes a control panel, which is located on one side of the energy storage converter and faces the opening.

[0008] The AC side of the energy storage converter is connected to the distribution box, which is connected to the AC power grid. The DC side of the energy storage converter is connected to the battery module. A switch module is installed on the DC side of the energy storage converter. The main control module is connected to the switch module. The battery management system controls the switching on and off of the switch module.

[0009] Furthermore, the battery management system includes a wiring panel, which is disposed on the control panel of the energy storage converter. The wiring panel is located between the control panel and the opening, and the wiring direction of the wiring panel faces the opening.

[0010] Furthermore, the energy storage device also includes an energy management system and a switch. The switch is communicatively connected to the wiring panel of the battery management system, and the switch is also communicatively connected to the energy management system and the energy storage converter, respectively.

[0011] Furthermore, the energy storage device also includes a power selection module. The first input port of the power selection module is connected to an AC-DC converter, which is connected to the distribution box. The second input port of the power selection module is connected to a transformer module, which is connected to the battery module.

[0012] Furthermore, the energy storage device also includes a fire protection module and a water immersion detection module. The fire protection module and the water immersion detection module are respectively connected to the output port of the power selection module, and the fire protection module and the water immersion detection module are communicatively connected to the wiring panel of the battery management system.

[0013] Furthermore, the fire protection module includes a fire controller, a fire pipeline, a fire cylinder, and a sensor, wherein: the fire controller is connected to the output port of the power selection module, the fire controller is communicatively connected to the wiring panel of the battery management system, the fire controller is connected to the sensor and the fire cylinder respectively, the output port of the fire cylinder is connected to the fire pipeline, and a sprinkler head is installed at the output end of the fire pipeline.

[0014] Furthermore, the water immersion detection module includes a sensing cable, a water immersion transmitter, and an alarm, wherein: the sensing cable is located at the bottom of the energy storage device, the sensing cable is connected to the water immersion transmitter, the water immersion transmitter is connected to the output port of the power selection module, the water immersion transmitter is communicatively connected to the wiring panel of the battery management system, and the wiring panel of the battery management system is connected to the alarm.

[0015] Furthermore, the energy storage device also includes a liquid chiller and a dehumidifier, which are respectively connected to the distribution box and are respectively communicatively connected to the wiring panel of the battery management system.

[0016] Furthermore, the energy storage device also includes a meter module, which includes at least a metering meter, a backflow prevention meter, a gate meter, and a signal surge protector. The metering meter, the backflow prevention meter, and the gate meter are respectively connected to the energy management system through the signal surge protector.

[0017] Secondly, this utility model provides an energy storage system, which includes at least one energy storage device and a control device as described in the first aspect of this utility model, wherein the control device is communicatively connected to the energy storage device.

[0018] The energy storage device provided by this invention integrates the battery management system (BMS) into the control panel of the energy storage converter, simplifying the installation process and allowing for quick and easy insertion and connection of BMS models and from different manufacturers into the energy storage device. Furthermore, the BMS's wiring panel faces outwards, enabling convenient disconnection for individual operation during maintenance or replacement, reducing maintenance difficulty and downtime. External connections to the BMS allow for rapid deployment and upgrades of the battery system without altering the internal structure of the energy storage device, improving production efficiency. Simultaneously, it allows for the selection of different communication interfaces and protocols based on actual needs, enhancing the compatibility and flexibility of the energy storage device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the energy storage device provided in an embodiment of the present invention;

[0021] Figure 2 This is a first schematic diagram of the connection of the energy storage device provided in this embodiment of the utility model;

[0022] Figure 3 This is a second schematic diagram showing the connection of the energy storage device provided in this embodiment of the utility model;

[0023] Figure 4 This is a communication schematic diagram of the energy storage device provided in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the integrated base of the energy storage device in an embodiment of this utility model;

[0025] Figure 6 This is a connection diagram of the energy storage system provided in an embodiment of the present invention.

[0026] Explanation of key component symbols:

[0027] 100. Energy storage device; 110. Energy storage converter; 120. Main control module; 130. Battery management system; 140. Distribution box; 150. Battery module; 160. Switch; 170. Energy management system; 180. Power selection module; 190. AC-DC converter; 200. Transformer module; 210. Fire protection module; 212. Fire cylinder; 213. Fire protection pipeline; 214. Sensor; 220. Water immersion detection module; 230. Lighting module; 240. Liquid chiller; 250. Dehumidifier; 260. Energy storage converter fan; 270. Electricity meter module; 300. Integrated base; 400. Energy storage system; 500. Control equipment. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described clearly and completely below with reference to the accompanying drawings of the embodiments of this utility model. It should be noted that the described embodiments are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] Existing energy storage devices that integrate the energy storage converter and main control module cannot achieve seamless switching when replacing or replacing components of the battery management system because the energy storage converter integrates or is closely connected to it. Typically, it requires disassembling the energy storage converter, removing the corresponding battery management system, replacing all related wiring harnesses, and then reinstalling the energy storage converter back into the main control module. Therefore, existing energy storage devices have low scalability and maintainability, requiring significant manpower and resources for maintenance, leading to increased maintenance costs and risks.

[0032] Example 1

[0033] This utility model provides an energy storage device that effectively solves the problems of low scalability and maintainability of existing energy storage devices, which require a lot of manpower and material resources for maintenance, resulting in increased maintenance costs and risks. Figure 1 This is a schematic diagram of the energy storage device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the energy storage device includes a cabinet and related electrical components installed inside the cabinet. The cabinet includes a door and has an opening. The door is located on one side of the opening of the cabinet to open and close the cabinet. Figure 2 This is a first schematic diagram of the connection of the energy storage device provided in this embodiment of the utility model, as shown below. Figure 2 As shown, the energy storage device 100 includes an energy storage converter 110, a main control module 120, a battery management system 130, a distribution box 140, and a battery module 150, all housed within a cabinet.

[0034] The main control module 120 is integrated inside the energy storage converter 110. The main control module 120 includes, but is not limited to, main positive and main negative contactors, fuses, pre-charge circuits, and battery management system main control boards. The energy storage converter 110 includes a control panel, which is located in a panel slot on one side of the energy storage converter 110, facing the opening of the cabinet.

[0035] The battery management system 130 includes a wiring panel, which is mounted on the control panel of the energy storage converter 110, specifically within a panel slot of the energy storage converter 110. The wiring panel is positioned between the control panel and an opening in the cabinet, with the wiring direction facing the opening. This wiring panel has multiple standard communication interfaces, including but not limited to CAN bus, RS485, LIN bus, and Ethernet interfaces. The selection of the communication interface can be based on factors such as data transmission rate, stability, and reliability. The energy storage converter 110 and the battery management system 130 are connected via a CAN bus, and an independent switch is provided between them.

[0036] The AC side of the energy storage converter 110 is connected to a distribution box 140, which is connected to an AC power grid. In this embodiment, the AC power grid is a three-phase four-wire AC power grid. The DC side of the energy storage converter 110 is connected to a battery module 150, which includes multiple battery packs. A switch module is installed on the DC side of the energy storage converter 110, and a main control module 120 is connected to this switch module. A battery management system 130 controls the switching of the switch module. The switch module includes, but is not limited to, contactors, disconnectors, or circuit breakers. The battery management system 130 and the battery module 150 are connected via a CAN bus. The battery management system 130 periodically collects various data from the battery module (such as voltage, current, temperature, SOC, and SOH) and transmits the collected data to the entire energy storage device 100 through a communication interface. Simultaneously, the battery management system 130 also receives control commands and data requests from other devices and parses these commands and requests.

[0037] By integrating key components within the main control module 120 into the energy storage converter 110, and through optimized internal layout and structural design, space utilization is maximized. Simultaneously, designing the battery management system 130 within the control panel of the energy storage converter 110 simplifies the installation process, allowing for quick and easy insertion and connection of battery management systems of different models and manufacturers into the energy storage device. The wiring panel of the battery management system 130 faces outwards, enabling convenient disconnection and individual operation when maintenance or replacement is required, reducing maintenance difficulty and downtime.

[0038] As a further technical solution of this utility model Figure 3 This is a second schematic diagram showing the connection of the energy storage device provided in this embodiment of the utility model. Figure 4 This is a communication schematic diagram of the energy storage device provided in an embodiment of the present invention, as shown below. Figure 3 and Figure 4As shown, the energy storage device 100 also includes an energy management system 170 and a switch 160. The energy management system 170 and the switch 160 are connected via a LIN bus. The energy management system 170 is responsible for the energy scheduling, optimization, and monitoring of the entire energy storage device, and can adjust the charging and discharging plan of the energy storage device in real time according to grid demand, battery status, and energy storage strategy. The switch 160 is responsible for data exchange and communication between the various systems. The switch 160 is connected to the LIN bus interface on the wiring panel of the battery management system 130 via the LIN bus. The switch 160 acquires data from the battery modules 150 collected by the battery management system 130 in real time and transmits it to the energy management system 170 or other devices that need this data. The switch 160 is also connected to the energy storage converter 110 via the LIN bus. The energy management system 170 can send charging and discharging commands to the energy storage converter 110 through the switch 160, and the energy storage converter 110 reports its operating status and the charging and discharging status of the battery pack to the switch 160.

[0039] The communication connection between the energy storage converter 110, battery management system 130, switch 160, and energy management system 170 is achieved through switch 160. Switch 160 acts as a communication hub, responsible for data exchange and command transmission between the various energy storage devices 100. This connection method not only improves the overall performance and reliability of the device but also facilitates its expansion and maintenance.

[0040] Optionally, the energy storage device 100 also includes a meter module 270, which is responsible for metering, monitoring, and transmitting data. The meter module 270 includes, but is not limited to, a metering meter, a backflow prevention meter, and a gate meter. These meters communicate with the energy management system 170 via a surge protector and an RS485 bus. The metering meter measures and records energy consumption; the backflow prevention meter monitors the direction of energy flow between the power grid and the energy storage device to prevent backflow; the gate meter is typically installed at the boundary between the power grid and the energy storage device to measure the amount of energy exchanged between them; and the surge protector protects the meter module 270 from external electromagnetic interference such as lightning and power surges, ensuring the stability and security of data communication.

[0041] In this embodiment of the invention, the energy storage device 100 further includes a power selection module 180. The power selection module 180 has a voltage detection unit internally. The first input port of the power selection module 180 is connected to an AC-DC converter 190, which is connected to a distribution box 140. A circuit breaker can be installed on the connection line. The second input port of the power selection module 180 is connected to a transformer module 200, which is connected to a battery module 150. A circuit breaker can also be installed on this connection line. The mains power from the three-phase four-wire AC grid and the power from the battery module are input to the power selection module 180. The voltage of the mains power from the three-phase four-wire AC grid, after being converted by the AC-DC converter 190, is higher than the voltage of the battery module 150 after being converted by the transformer module 200. The voltage detection unit detects the two voltages and prioritizes the output of the power source with the higher voltage. Therefore, when mains power is available, it is used first; when mains power is unavailable, the battery module provides the power.

[0042] Optionally, the energy storage device 100 also includes a fire-fighting module 210, which is connected to the output port of the power selection module 180. The fire-fighting module 210 is also connected to the CAN bus interface on the wiring panel of the battery management system 130 via a CAN bus, enabling timely reporting of the situation and receiving control commands in the event of a fire. The fire-fighting module 210 includes a fire controller, a fire-fighting gas cylinder 212, a fire-fighting pipeline 213, and sensors 214. Specifically, the fire controller is connected to the output port of the power selection module 180, and its CAN bus is connected to the CAN bus interface on the wiring panel of the battery management system 130. The fire controller is connected to both the sensors 214 and the fire-fighting gas cylinder 212. The sensors 214 include, but are not limited to, temperature sensors, smoke sensors, and combustible gas sensors. The fire-fighting gas cylinder 212 includes, but is not limited to, cylinders containing aerosol, carbon dioxide extinguishing agent, and heptafluoropropane extinguishing agent. The output port of the fire-fighting gas cylinder 212 is connected to the fire-fighting pipeline 213, and a sprinkler head is installed at the output end of the fire-fighting pipeline 213.

[0043] Optionally, the energy storage device 100 also includes a water immersion detection module 220. This module is connected to the output port of the power selection module 180 and also connects to the CAN bus interface on the wiring panel of the battery management system 130 via a CAN bus to achieve real-time detection of humidity and water leakage inside the energy storage device 100. The water immersion detection module 220 includes a sensing cable, a water immersion transmitter, and an alarm. The sensing cable is evenly and densely laid across the entire bottom surface inside the energy storage device 100. The sensing cable is connected to the water immersion transmitter, which is connected to the output port of the power selection module 180. The water immersion transmitter is also communicatively connected to the wiring panel of the battery management system 130, and the wiring panel of the battery management system 130 is connected to the alarm. The water immersion detection module 220 utilizes the principle of liquid conductivity. When water leaks from the energy storage device 100 and drips onto the sensing cable, the sensing cable will short-circuit, resulting in a change in current. The change in current is received by the water immersion transmitter and transmitted to the battery management system 130. At the same time, the battery management system 130 controls the alarm to sound an alarm, which can be an audible and visual alarm, thereby alerting staff that a water leak has occurred.

[0044] The inclusion of the fire protection module 210 and the water immersion detection module 220 significantly enhances the safety performance of the energy storage device 100. These two modules can monitor and respond to potential safety hazards such as fire and water immersion in real time, ensuring the stable operation of the energy storage device in harsh environments. Furthermore, integration with systems such as the battery management system 130 enables comprehensive monitoring and management of the energy storage device, improving the overall intelligence level and operational efficiency of the device.

[0045] Optionally, the energy storage device 100 also includes a lighting module 230, which is connected to the output of the power selection module 180. During the installation, maintenance, and repair of the energy storage device 100, the lighting module 230 can provide necessary lighting to ensure that workers can work smoothly even in low-light conditions. Simultaneously, through specific light colors or flashing patterns, the lighting module 230 can also serve as a safety warning device, alerting workers to potential dangers or abnormal situations.

[0046] Optionally, the energy storage device 100 also includes a liquid cooler 240, which is connected to the distribution box 140. The liquid cooler 240 is mainly used for cooling the energy storage device 100, removing the heat generated by the battery and other energy storage components during operation through liquid circulation. Simultaneously, the liquid cooler 240 is connected to the RS485 bus interface on the wiring panel of the battery management system 130 via an RS485 bus, enabling data exchange and command transmission with the battery management system 130. The battery management system can monitor the temperature of the energy storage components in real time and adjust the operating status of the liquid cooler 240 as needed to ensure that the temperature of the energy storage components remains within a safe range, thereby improving the efficiency and stability of the energy storage system and extending the service life of the energy storage components.

[0047] Optionally, the energy storage device 100 also includes a dehumidifier 250, which is connected to the distribution box 140 to control the humidity inside the energy storage device and prevent equipment corrosion, short circuits, and other malfunctions caused by excessive humidity. Simultaneously, the dehumidifier 250 is connected to the RS485 bus interface on the wiring panel of the battery management system 130 via an RS485 bus. The battery management system 130 can monitor the humidity inside the energy storage device 100 in real time and adjust the operating status of the dehumidifier 250 as needed to ensure that the humidity inside the energy storage device 100 is always maintained within a suitable range.

[0048] Optionally, the energy storage device 100 also includes an energy storage converter fan 260, which is connected to the distribution box 140. The energy storage converter fan 260 is connected to the energy storage converter 110 through an independent switch. The energy storage converter 110 generates a lot of heat during operation. The main function of the energy storage converter fan 260 is to remove the heat through air convection, ensuring that the energy storage converter 110 can operate at a suitable temperature and avoid performance degradation or damage due to overheating.

[0049] In a preferred embodiment of this utility model, the energy storage device 100 is provided with an integrated base 300 at its bottom. Figure 5 This is a schematic diagram of the integrated base of the energy storage device in an embodiment of this utility model, as shown below. Figure 5 As shown, the energy storage device 100 can be directly installed and wired on a flat ground using the integrated base 300, eliminating the need for the traditional energy storage device to be installed and fixed after a foundation is laid. Alternatively, the integrated base 300 can be removed or not removed to install and fix the device directly on the existing foundation.

[0050] In summary, the energy storage device provided by this embodiment integrates the battery management system (BMS) into the control panel of the energy storage converter, simplifying the installation process and allowing for quick and easy insertion and connection of BMS models and from different manufacturers into the energy storage device. Furthermore, the outward-facing wiring panel of the BMS facilitates easy disconnection and separate operation during maintenance or replacement, reducing maintenance difficulty and downtime. External connections to the BMS enable rapid deployment and upgrades of the battery system without altering the internal structure of the energy storage device, improving production efficiency. Simultaneously, it allows for the selection of different communication interfaces and protocols based on actual needs, enhancing the compatibility and flexibility of the energy storage device.

[0051] Example 2

[0052] Based on the same technical concept, this utility model embodiment also provides an energy storage system. Figure 6 This is a connection diagram of the energy storage system provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the energy storage system 400 includes at least one energy storage device 100 as described in Embodiment 1 and a control device 500. The control device 500 is communicatively connected to the energy storage device 100 and includes, but is not limited to, electronic devices such as computers, mobile phones, and tablets.

[0053] The energy storage system provided in this embodiment of the utility model can monitor the operating status of the energy storage device in real time through the control equipment. At the same time, it allows different communication interfaces and protocols to be selected according to actual needs, thereby improving the compatibility and flexibility of the energy storage device. The control equipment can flexibly schedule the energy storage device according to the grid demand and market conditions, which helps to balance the grid load and improve the overall energy utilization efficiency.

[0054] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An energy storage device, characterized by, The energy storage device comprises a cabinet body and an energy storage converter, a master control module, a battery management system, a distribution box and a battery module arranged in the cabinet body, wherein: The cabinet body comprises a cabinet door arranged at one side of an opening of the cabinet body to open and close the cabinet body; The master control module is integrated inside the energy storage converter, the battery management system is arranged on the energy storage converter, the energy storage converter comprises a control panel arranged at one side of the energy storage converter, and the control panel is directed towards the opening; The AC side of the energy storage converter is connected to the distribution box, the distribution box is connected to an AC power grid, the DC side of the energy storage converter is connected to the battery module, the DC side of the energy storage converter is provided with a switch module, the master control module is connected to the switch module, and the battery management system controls the on-off of the switch module.

2. The energy storage device of claim 1, wherein, The battery management system comprises a wiring panel, the battery management system is arranged on the control panel of the energy storage converter, the wiring panel is arranged between the control panel and the opening, and the wiring direction of the wiring panel is directed towards the opening.

3. The energy storage device of claim 2, wherein, The energy storage device further comprises an energy management system and a switch, the switch is communicatively connected to the wiring panel of the battery management system, and the switch is further communicatively connected to the energy management system and the energy storage converter.

4. The energy storage device of claim 2, wherein, The energy storage device further comprises a power selection module, a first input port of the power selection module is connected to an AC-DC converter, the AC-DC converter is connected to the distribution box, a second input port of the power selection module is connected to a voltage conversion module, and the voltage conversion module is connected to the battery module.

5. The energy storage device of claim 4, wherein, The energy storage device further comprises a fire-fighting module and a water immersion detection module, the fire-fighting module and the water immersion detection module are respectively connected to an output port of the power selection module, and the fire-fighting module and the water immersion detection module are communicatively connected to the wiring panel of the battery management system.

6. The energy storage device of claim 5, wherein, The fire-fighting module comprises a fire-fighting controller, a fire-fighting pipeline, a fire-fighting gas cylinder and a sensor, wherein: the fire-fighting controller is connected to the output port of the power selection module, the fire-fighting controller is communicatively connected to the wiring panel of the battery management system, the fire-fighting controller is connected to the sensor and the fire-fighting gas cylinder respectively, an output port of the fire-fighting gas cylinder is connected to the fire-fighting pipeline, and an output end of the fire-fighting pipeline is provided with a spray head.

7. The energy storage device of claim 5, wherein, The water immersion detection module comprises an induction cable, a water immersion transmitter and an alarm, wherein: the induction cable is arranged at the bottom of the energy storage device, the induction cable is connected to the water immersion transmitter, the water immersion transmitter is connected to the output port of the power selection module, the water immersion transmitter is communicatively connected to the wiring panel of the battery management system, and the wiring panel of the battery management system is connected to the alarm.

8. The energy storage device of claim 5, wherein, The energy storage device further comprises a liquid cooling machine and a dehumidifier, and the liquid cooling machine and the dehumidifier are respectively connected to the distribution box and communicatively connected to the wiring panel of the battery management system.

9. The energy storage device of claim 3, wherein, The energy storage device also includes an electricity meter module, which includes at least a metering electricity meter, a backflow prevention electricity meter, a gate meter, and a signal surge protector. The metering electricity meter, the backflow prevention electricity meter, and the gate meter are respectively connected to the energy management system through the signal surge protector.

10. An energy storage system characterized by, The energy storage system includes at least one energy storage device as described in any one of claims 1-9 and a control device, wherein the control device is communicatively connected to the energy storage device.

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