Energy storage system

Abstract

The energy storage system comprises a box body, a plurality of battery assemblies and a fire fighting assembly, the box body comprises side plates and end plates, the side plates are arranged on the two opposite sides of the box body in the width direction, the end plates are arranged on the two opposite sides of the box body in the length direction, and the side plates and the end plates are connected to define a containing cavity. The end plate is provided with a maintenance opening communicated with the containing cavity, the battery assemblies are arranged on the two sides, close to the side plate, in the containing cavity correspondingly, a channel is formed between the battery assemblies, and the fire fighting assembly is arranged in the channel, extends along the channel and is used for fire fighting and extinguishment of the battery assemblies. The technical problem that an existing energy storage system is difficult in fire protection and maintenance is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage device technical field especially relates to a kind of energy storage systems. BACKGROUND

[0002] With the rapid development of energy storage technology, energy storage systems are widely used in power, transportation, communication and other industries, providing important support for efficient use of energy. However, the existing energy storage systems still have many problems in layout. In order to save space and improve energy density, battery clusters are generally arranged densely.

[0003] The arrangement of battery clusters is too dense, which leads to difficulty in heat dissipation inside the system. As the heat generated during charging and discharging of the batteries accumulates, the densely arranged battery clusters cannot effectively dissipate heat, which may cause overheating. Overheating not only affects the service life and performance of the batteries, but also may cause fire, threatening the safety of personnel and equipment. Moreover, due to the dense layout, when a fire occurs, some areas are difficult to be covered by the fire extinguishing system, making it difficult to achieve effective fire extinguishing.

[0004] At the same time, the dense arrangement of battery clusters increases the difficulty of maintenance and repair. Battery systems may fail during long-term operation, such as battery short circuit, failure, etc. If the space between battery clusters is narrow, maintenance and replacement personnel not only face the problem of insufficient space, but also may cause damage to other system components due to misoperation during disassembly. More importantly, in the event of an emergency such as fire, the dense arrangement of battery clusters makes it extremely difficult to extinguish the fire, and fire personnel are difficult to quickly find the source of failure and effectively handle it.

[0005] Therefore, the existing energy storage system has the technical problem of difficult fire maintenance, which needs to be improved. UTILITY MODEL CONTENT

[0006] One purpose of the utility model is to provide an energy storage system, which aims to solve the technical problem of difficult fire maintenance of the existing energy storage system.

[0007] To achieve the above purpose, the utility model provides a scheme: an energy storage system, which comprises a box body, including side plates and end plates, the side plates are arranged on opposite sides in the width direction of the box body, the end plates are arranged on opposite sides in the length direction of the box body, the side plates and the end plates are connected to form a containing cavity, and the end plates are provided with maintenance openings communicating with the containing cavity; a plurality of battery assemblies are arranged near the two sides of the side plates in the containing cavity, and a passage is formed between the plurality of battery assemblies; a fire extinguishing assembly is arranged in the passage and extends along the passage, and the fire extinguishing assembly is used for fire extinguishing of the battery assemblies.

[0008] Optionally, the energy storage system further comprises a partition plate arranged in the accommodating cavity, two ends of the partition plate being connected with the box body; the accommodating cavity comprises a battery compartment and an electrical compartment, one side of the partition plate being the battery compartment, the battery compartment being used for placing the battery assembly, the other side of the partition plate being the electrical compartment, the electrical compartment being used for placing the power regulation and control equipment.

[0009] Optionally, the partition plate is provided with a communication port, the communication port communicating the battery compartment and the electrical compartment; the energy storage system further comprises an isolation door, the isolation door being connected with the partition plate to open or seal the communication port.

[0010] Optionally, the fire-fighting assembly comprises a detection circuit and a liquid fire extinguishing element, the detection circuit and the liquid fire extinguishing element being arranged along the extension direction of the channel, the detection circuit being used for detecting a fire and starting the liquid fire extinguishing element.

[0011] Optionally, the fire-fighting assembly further comprises a gas fire extinguishing element, the gas fire extinguishing element being arranged side by side with the liquid fire extinguishing element and at the same height, the gas fire extinguishing element and the liquid fire extinguishing element being started by the detection circuit.

[0012] Optionally, the battery assembly comprises a plurality of battery clusters and a baffle, the plurality of battery clusters being arranged along the extension direction of the channel, the baffle being arranged between the battery clusters.

[0013] Optionally, the energy storage system further comprises a temperature control assembly, the temperature control assembly being in communication with the accommodating cavity, the temperature control assembly being used for regulating the temperature in the accommodating cavity.

[0014] Optionally, the temperature control assembly comprises an air conditioner and a ventilation duct, the ventilation duct being arranged in the accommodating cavity along the extension direction of the channel, the ventilation duct being provided with a ventilation port in communication with the accommodating cavity, the air conditioner being in communication with the ventilation duct, the air conditioner being used for conveying cold air / warm air to the ventilation duct.

[0015] Optionally, the number of ventilation ports is greater than or equal to two, and the ventilation ports are arranged at intervals along the extension direction of the channel.

[0016] Optionally, the box body is further provided with an air inlet and an air outlet, the air inlet and the air outlet being mutually opposite along the extension direction of the channel, and the air inlet and the air outlet being in a closed state under a normal condition and being openable under a thermal runaway condition.

[0017] The utility model discloses the beneficial effect lies in:

[0018] Compared with the existing energy storage system, the battery assembly is arranged near the side plate of the box body to form a channel, which avoids the problem of excessive density of the battery assembly, effectively improves the heat dissipation efficiency, and reduces the risk of thermal runaway. At the same time, the maintenance opening provided on the box body cooperates with the channel to provide sufficient operation space for the maintenance personnel, facilitating fault troubleshooting and component replacement, thereby improving the maintainability and efficiency of the system. In addition, the fire-fighting assembly provided in the channel can be quickly started when a fire occurs, fully covering the battery assembly for fire extinguishing, and protecting the system from fire hazards. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0020] Figure 1 is a structural schematic diagram of the energy storage system provided by the embodiment of the present application;

[0021] Figure 2 is a partial structure top view of the energy storage system provided by the embodiment of the present application;

[0022] Figure 3 is a partial structure schematic diagram of the energy storage system provided by the embodiment of the present application;

[0023] Figure 4 is a partial structure top view of the energy storage system provided by the embodiment of the present application;

[0024] Figure 5 is a structural schematic diagram of the fire-fighting assembly provided by the embodiment of the present application;

[0025] Figure 6 is a partial sectional view of the energy storage system channel extension direction provided by the embodiment of the present application;

[0026] Figure 7 is a structural schematic diagram of the ventilation pipeline provided by the embodiment of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 10, cabinet; 11, end plate; 111, maintenance opening; 12, side plate; 13, containing cavity; 131, battery compartment; 132, electrical compartment; 14, passage; 15, air inlet; 16, air outlet; 20, battery assembly; 21, battery cluster; 22, baffle; 30, fire-fighting assembly; 31, detection circuit; 32, liquid fire extinguishing element; 33, gas fire extinguishing element; 40, partition; 41, communication opening; 50, isolation door; 60, temperature control assembly; 61, air conditioner; 62, ventilation duct; 621, ventilation opening. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Please refer to Figures 1 to 3 , Figure 1 is a structural schematic diagram of the energy storage system provided by the embodiments of the present application, Figure 2 is a top view of part of the structure of the energy storage system provided by the embodiments of the present application, Figure 3 is a structural schematic diagram of part of the energy storage system provided by the embodiments of the present application.

[0031] The embodiments of the present application provide an energy storage system, which comprises a cabinet 10, a plurality of battery assemblies 20 and a fire-fighting assembly 30. The core of the energy storage system is to optimize the layout of the battery assemblies 20, to ensure efficient fire-fighting treatment in the case of emergency such as fire, on the premise of improving the safety and maintainability of the system.

[0032] Specifically, the cabinet 10 comprises side plates 12 and end plates 11. The side plates 12 are arranged on the opposite sides in the width direction of the cabinet 10, and the end plates 11 are arranged on the opposite sides in the length direction of the cabinet 10. The side plates 12 and the end plates 11 are connected to form a containing cavity 13. The containing cavity 13 provides sufficient space for the arrangement of the battery assemblies 20, and the end plates 11 are provided with maintenance openings 111 which are in communication with the containing cavity 13. The maintenance openings 111 enable the maintenance personnel of the system to more conveniently perform the inspection, maintenance and replacement of the battery assemblies 20.

[0033] The energy storage system comprises a plurality of battery assemblies 20, which are arranged in the accommodating cavity 13 of the box body 10 close to the two sides of the side plate 12. Since the side plate 12 is arranged in the length direction of the box body 10, the battery assemblies 20 are arranged close to the side plate 12, so that the space can be utilized to a large extent, and meanwhile, the battery assemblies 20 are prevented from being too dense, so that sufficient space is provided for heat dissipation and maintenance of the batteries.

[0034] Channels 14 are formed between the battery assemblies 20, and the channels 14 provide convenient channels for subsequent maintenance operations. Especially when the batteries need to be repaired or replaced, technicians can easily enter the channels 14 to perform necessary operations, so that operation difficulties caused by narrow space are avoided. Meanwhile, the channels 14 between the battery assemblies 20 are arranged with fire-fighting assemblies 30, and the fire-fighting assemblies 30 extend along the direction of the channels 14. The fire-fighting assemblies 30 are arranged to provide comprehensive fire-fighting protection for the battery assemblies 20, and once a fire occurs, the fire-fighting assemblies 30 can be quickly started and cover various areas of the battery assemblies 20 to perform fire extinguishing treatment. Such a layout ensures the timeliness and comprehensiveness of fire-fighting treatment, and improves the emergency response capability of the energy storage system when a fire occurs.

[0035] In the embodiment, unlike the dense battery arrangement commonly seen in the prior art, the battery assemblies 20 are arranged close to the side plate 12 of the box body 10, so that wide channels 14 are formed, which not only avoids excessive density of the battery assemblies 20 and reduces the risk of uneven heat dissipation, but also effectively provides operation space for maintenance personnel. In addition, the fire-fighting assemblies 30 arranged in the channels 14 can timely and comprehensively extinguish the fire when a fire occurs, so as to protect the safe operation of the battery system. Through optimization of the layout of the battery assemblies 20 and the design of the fire-fighting system, the utility model not only solves the difficult problems of the traditional energy storage system in fire-fighting and maintenance, but also improves the overall safety and maintainability of the system.

[0036] In some embodiments, please refer to Figure 4 , Figure 4 is a partial structure top view of the energy storage system provided by the utility model embodiment. The energy storage system further comprises a partition plate 40, which is arranged in the accommodating cavity 13 and connected to the box body 10 at both ends of the partition plate 40, so as to form a fixed structure. The partition plate 40 reasonably divides the space of the accommodating cavity 13, and divides the accommodating cavity 13 into two independent parts, namely a battery compartment 131 and an electrical compartment 132.

[0037] The battery compartment 131 and the electrical compartment 132 respectively undertake their respective functions, the battery compartment 131 is located at one side of the partition plate 40, and is specially used for placing the battery assembly 20. Opposite to the battery compartment 131 is the electrical compartment 132, which is located at the other side of the partition plate 40, and is mainly used for placing the power regulating device and other electrical components, such as an inverter, a control module, a protection circuit, a monitoring device and the like.

[0038] The material and thickness of the partition plate 40 can be selected according to actual needs, and a material with good mechanical strength and flame retardance is usually adopted to enhance the safety and stability of the system.

[0039] In the embodiment, by setting the partition plate 40 and dividing the containing cavity 13 into the battery compartment 131 and the electrical compartment 132, the functional partition of the battery assembly 20 and the power regulating device is realized. The partition plate 40 can effectively isolate the battery pack and the electrical device, prevent the influence of the battery pack failure on the electrical device, or the problem of the battery pack caused by the electrical device failure. At the same time, the partition plate 40 can also effectively reduce the influence of the electromagnetic interference of the electrical device on the battery.

[0040] In addition, the partition design makes the devices in the battery compartment 131 and the electrical compartment 132 can be independently maintained and inspected. When the battery assembly 20 is maintained, the operator can avoid interference with the power regulating device in the electrical compartment 132, and when the electrical device is maintained, the disassembly and influence of the battery pack can also be avoided.

[0041] Further, please refer to Figure 3 , Figure 3 is a partial structure schematic diagram of the energy storage system provided by the embodiment of the utility model. In order to enhance the flexibility and operability of the energy storage system, and give consideration to the safety isolation and effective communication between the battery compartment 131 and the electrical compartment 132, the partition plate 40 is provided with a communication port 41, and the communication port 41 connects the battery compartment 131 and the electrical compartment 132. The communication port 41 allows the battery compartment 131 and the electrical compartment 132 to realize the communication of fluid, gas or power and the like under certain conditions.

[0042] At the same time, in order to prevent unnecessary mutual interference, the energy storage system is also designed with an isolation door 50, which is connected with the partition plate 40, and can be opened or sealed to the communication port 41 according to needs, so as to ensure that the battery compartment 131 and the electrical compartment 132 can be physically isolated or connected as necessary.

[0043] In this embodiment, the communication port 41 allows the battery compartment 131 and the electrical compartment 132 to be connected to each other in certain cases, facilitating the integration and cooperation of the internal energy storage system. The isolation door 50 is connected with the partition plate 40 and can open or close the communication port 41 as needed to control the connection or isolation between the battery compartment 131 and the electrical compartment 132. In the normal working state, the isolation door 50 can close the communication port 41 to maintain the independence of the battery compartment 131 and the electrical compartment 132, preventing electromagnetic interference or gas from affecting the sensitive power regulation equipment in the electrical compartment 132. In special cases, the isolation door 50 can be opened to connect the battery compartment 131 and the electrical compartment 132.

[0044] Further, please refer to Figure 2 and Figure 5 , Figure 2 is a partial structure top view of an energy storage system provided by the embodiment of the utility model, Figure 5 is a structure schematic view of a fire-fighting assembly 30. In order to improve the safety of the energy storage system, in this embodiment, the fire-fighting assembly 30 includes a detection circuit 31 and a liquid fire extinguishing element 32, which work together to quickly respond and perform fire extinguishing operations in the early stage of a fire, ensuring the safe operation of the energy storage system.

[0045] The detection circuit 31 extends along the channel 14 and covers various areas of the battery pack, and can respond in a timely manner when a fire occurs. The detection circuit 31 is mainly used for real-time monitoring of fire signs, especially overheat, short circuit or other potential fire hazards that may occur during the charging and discharging process of the battery assembly 20. The detection circuit 31 is generally composed of temperature sensors, smoke detectors or thermocouples, etc., which can sensitively monitor the temperature change and harmful gas concentration inside the system.

[0046] The liquid fire extinguishing element 32 is the fire extinguishing execution part in the fire-fighting system, which closely cooperates with the detection circuit 31 to immediately start and extinguish the fire when the fire sign is detected. The liquid fire extinguishing element 32 mainly includes the storage, distribution pipeline and injection device of the fire extinguishing liquid. The liquid fire extinguishing element 32 extends along the channel 14 and covers multiple areas of the battery compartment 131 and the electrical compartment 132, ensuring that the battery pack and electrical equipment can be fully extinguished.

[0047] In this embodiment, when the detection circuit 31 detects abnormal temperature, smoke or gas concentration, the detection circuit 31 can transmit the early signal of the fire in real time to provide timely data support for the fire extinguishing system. Once the fire is confirmed, the detection circuit 31 will start the liquid fire extinguishing element 32, and the liquid fire extinguishing agent is sprayed to the fire source area through the injection device to quickly suppress the fire. The fire extinguishing system can accurately spray to the fire source and prevent the flame from further spreading.

[0048] The cooperation of the detection line 31 and the liquid fire extinguishing element 32 enables the energy storage system to quickly detect the fire source at the initial stage of the fire and extinguish the fire, so as to ensure that the fire is suppressed at the initial stage and avoid the spread of the fire to cause heavy losses. Moreover, the entire fire extinguishing process is completed by the automatic system, so as to avoid the delay or misoperation of manual operation and improve the response speed and fire extinguishing precision of the system.

[0049] In some embodiments, in order to improve the fire extinguishing efficiency of the energy storage system and the diversity of the fire extinguishing mode, the gas fire extinguishing element 33 is added on the basis of the original liquid fire extinguishing element 32. The gas fire extinguishing element 33 is an important part of the fire extinguishing assembly 30, and mainly releases fire extinguishing gas to quickly extinguish the fire source. Unlike the traditional liquid fire extinguishing system, the gas fire extinguishing system can effectively reduce the oxygen concentration around the fire source by using chemical gas or gas mixture, so as to inhibit the combustion process of the flame and achieve the purpose of fire extinguishing.

[0050] The fire extinguishing system has both liquid and gas fire extinguishing means, and can flexibly cope with different fire scenes. The gas fire extinguishing element 33 and the liquid fire extinguishing element 32 are arranged side by side and at the same height, so as to ensure the synergistic effect of the two during fire extinguishing, and also can be started through the same detection line 31, so as to realize the unified management and control of the system.

[0051] In the embodiment, the gas fire extinguishing element 33 and the liquid fire extinguishing element 32 are arranged side by side and at the same height. By utilizing the complementarity of the two fire extinguishing modes, the best fire extinguishing means can be flexibly selected according to the specific situation of the fire.

[0052] Specifically, the gas fire extinguishing is suitable for the fire extinguishing of electrical equipment or precision instruments and will not cause damage to the equipment, while the liquid fire extinguishing is suitable for the fire occurring in an area with large heat source and wide area. The two are arranged side by side, so that the gas or liquid fire extinguishing can be flexibly selected according to the specific nature of the fire, so as to ensure the efficiency of the fire extinguishing process.

[0053] Meanwhile, by arranging the gas fire extinguishing element 33 and the liquid fire extinguishing element 32 side by side, the space can be effectively utilized, so as to ensure that the fire extinguishing equipment can maximize the coverage range in the limited space, reduce the occupied space and improve the fire extinguishing effect.

[0054] In some embodiments, please refer to Figure 6 , Figure 6 is a partial sectional view of the energy storage system channel 14 extending direction provided by the embodiment of the utility model. The battery assembly 20 comprises a plurality of battery clusters 21 and baffles 22. The battery clusters 21 are arranged along the extending direction of the channel 14, and the baffles 22 are arranged between the battery clusters 21, which aims to optimize the heat dissipation performance of the battery assembly 20 and improve the battery safety by physical isolation and reasonable layout, and provide better convenience for subsequent maintenance and management.

[0055] In this embodiment, by arranging the battery clusters 21 along the direction of the channel 14, the space of the energy storage system can be effectively utilized, avoiding waste of space. In addition, the arrangement of the battery clusters 21 helps to maintain the air flow in the channel 14 of the energy storage system, thereby optimizing the heat dissipation efficiency.

[0056] The baffle 22 not only plays a physical isolation role between the battery clusters 21, but also helps to regulate the heat transfer between the battery clusters 21. By preventing direct contact between the battery clusters 21, the risk of battery short circuit, overheating or fire is reduced. The baffle 22 can effectively isolate the electrical and thermal conduction between the battery clusters 21, reducing the impact on the surrounding battery clusters 21 when a single battery cluster 21 fails.

[0057] In some embodiments, in order to improve the stability and performance of the energy storage system, especially in the case of long-time and high-load operation, the energy storage system further comprises a temperature control assembly 60, which is in communication with the containing cavity 13 and is designed to regulate the temperature in the containing cavity 13 in real time. The introduction of the temperature control assembly 60 improves the safety and reliability of the energy storage system by managing the operating temperature of the battery assembly 20 and other electronic components, prolonging the service life of the system.

[0058] The temperature control assembly 60 is usually composed of temperature sensors, temperature control regulators (such as fans, heating devices), control modules and heat transfer equipment, etc. The temperature sensor is responsible for real-time monitoring of temperature changes in the containing cavity 13. The temperature control regulator is mainly responsible for adjusting the temperature. Common regulators include fans, liquid cooling systems, heat exchangers, etc. When the temperature sensor detects that the temperature exceeds the preset range, the temperature control regulator will start the corresponding cooling or heating device.

[0059] In this embodiment, the main task of the temperature control assembly 60 in the energy storage system is to monitor and adjust the temperature in the containing cavity 13, ensuring that the entire system operates within an appropriate temperature range. Both excessively high and low temperatures can have a negative impact on battery performance, lifespan and safety.

[0060] The temperature control assembly 60 can adjust according to the set threshold value. When the temperature in the containing cavity 13 is too high, the temperature control assembly 60 can start the refrigeration mechanism (such as fans, liquid cooling systems, etc.) to reduce the temperature; conversely, when the temperature is too low, the heating device can be started to keep the system temperature within the ideal range.

[0061] At the same time, the adjustment mechanism of the temperature control assembly 60 can be adjusted according to the environmental temperature and the load change of the energy storage system, meeting the temperature control requirements while avoiding energy waste. For example, the fan or liquid cooling system can be turned on according to actual needs, reducing unnecessary energy consumption.

[0062] In some embodiments, the temperature control assembly 60 specifically includes an air conditioner 61 and a ventilation duct 62. The air conditioner 61 is mainly responsible for providing cold air or warm air, and according to the real-time temperature condition in the containing cavity 13, it delivers appropriate air temperature to the containing cavity 13 through the connection with the ventilation duct 62. The air conditioner 61 can automatically adjust the output temperature according to the preset temperature range or the actual temperature fluctuation, ensuring that the temperature in the system always remains within a safe range. The ventilation duct 62 serves as the air delivery channel 14 of the temperature control assembly 60, and is arranged along the extension direction of the channel 14 of the containing cavity 13, and is provided with ventilation openings 621 connected with the containing cavity 13, so as to ensure that the air can cover all the battery assemblies 20, electronic components and other areas that need temperature regulation.

[0063] In the present embodiment, by combining the air conditioner 61 and the ventilation duct 62, the temperature control capability of the energy storage system is effectively improved. The air conditioner 61 adjusts the temperature in the containing cavity 13 by providing cold air or warm air, and the ventilation duct 62 ensures that the cold air or warm air can be uniformly distributed to each battery cluster 21 and equipment area, thereby realizing accurate temperature control management.

[0064] When the temperature in the containing cavity 13 is too high, the air conditioner 61 starts the cooling mode to deliver cold air to the ventilation duct 62, and the cold air is guided to each battery cluster 21, electronic components and other positions in the containing cavity 13 through the ventilation duct 62, so as to quickly reduce the temperature in the cavity. When the temperature is too low, the air conditioner 61 switches to the heating mode to provide warm air to be delivered to the containing cavity 13 through the ventilation duct 62, so as to ensure that the temperature of the system will not be lower than the minimum working temperature of the battery and other key equipment.

[0065] Further, please refer to Figure 7 , Figure 7 is a structural schematic view of the ventilation duct 62 provided by the embodiment of the utility model. In order to realize more uniform and efficient air circulation, the number and layout of the ventilation openings 621 are further optimized in the present embodiment. Specifically, the number of ventilation openings 621 is set to be greater than or equal to two, and these ventilation openings 621 are arranged at intervals along the extension direction of the channel 14, so as to realize uniform distribution and circulation of air, improve the coverage effect of cold air or warm air, and avoid the phenomenon of local overheating or overcooling.

[0066] In the present embodiment, by arranging multiple ventilation openings 621, air can enter the containing cavity 13 from multiple positions at the same time. When the air conditioner 61 delivers cold air or warm air, the air flow can more uniformly cover each area in the containing cavity 13, avoiding the temperature imbalance phenomenon caused by a single ventilation opening 621. The ventilation openings 621 are arranged at intervals along the extension direction of the channel 14, which can maximize the avoidance of dead angles or stagnant areas of air. Avoiding the temperature unevenness caused by poor air flow in some areas.

[0067] In some embodiments, please refer toFigure 3 , Figure 3 is a partial structure schematic diagram of the energy storage system. In order to improve the safety of the energy storage system under high temperature or thermal runaway condition, the box body 10 is also provided with a two-way ventilation system of the air inlet 15 and the air outlet 16. The air inlet 15 and the air outlet 16 are arranged along the extension direction of the channel 14 and are mutually away from each other. In the normal working state, the air inlet 15 and the air outlet 16 are in a closed state, so as to prevent external pollutants from entering the system or the air flow of the temperature control system from being unstable due to the opening of the ventilation port 621. When the system appears thermal runaway condition, the air inlet 15 and the air outlet 16 can be automatically or manually opened, and the smoke or harmful gas generated in the box body 10 is quickly discharged, so as to reduce the influence of the fire or the battery thermal runaway on the system safety.

[0068] In the embodiment, by arranging the air inlet 15 and the air outlet 16, when the smoke and the toxic gas are released due to overheating or fire, the rapid exchange of the air flow in the box body 10 is ensured, the smoke and the harmful gas can be quickly taken away, the risk of fire spreading in the system is reduced, and the accumulation of the toxic smoke in the box body 10 is prevented. The air inlet 15 and the air outlet 16 can be connected with the fan to improve the gas flow efficiency.

[0069] It should be noted that all the directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0070] It should be further noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element through a middle element.

[0071] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of the technical solutions appears contradictory or unachievable, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope required by the present application.

[0072] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the inventive concept of the present application, as described in the present application specification and drawings, is included in the patent protection scope of the present application.

Claims

1. An energy storage system, characterized by, The energy storage system comprises: a box body comprising side plates arranged on opposite sides in the width direction of the box body and end plates arranged on opposite sides in the length direction of the box body, the side plates and the end plates being connected to form a containing cavity, and the end plates being provided with maintenance openings communicating with the containing cavity; a plurality of battery assemblies arranged in the containing cavity close to the two sides of the side plates, a channel being formed between the plurality of battery assemblies; a fire-fighting assembly arranged in the channel and extending along the channel, the fire-fighting assembly being used for fire-fighting of the battery assemblies.

2. An energy storage system according to claim 1, wherein, The energy storage system further comprises a partition plate arranged in the containing cavity, two ends of the partition plate being connected to the box body. The containing cavity comprises a battery compartment and an electrical compartment, one side of the partition plate being the battery compartment for placing the battery assemblies, and the other side of the partition plate being the electrical compartment for placing power regulation equipment.

3. An energy storage system according to claim 2, wherein, The partition plate is provided with a communication opening communicating the battery compartment and the electrical compartment. The energy storage system further comprises an isolation door connected to the partition plate to open or seal the communication opening.

4. The energy storage system of claim 1, wherein, The fire-fighting assembly comprises a detection circuit and a liquid fire extinguishing element, both the detection circuit and the liquid fire extinguishing element being arranged along the extension direction of the channel, the detection circuit being used for detecting fire and starting the liquid fire extinguishing element.

5. An energy storage system according to claim 4, wherein, The fire-fighting assembly further comprises a gas fire extinguishing element arranged side by side with the liquid fire extinguishing element and at the same height, both the gas fire extinguishing element and the liquid fire extinguishing element being started by the detection circuit.

6. An energy storage system according to any one of claims 1-5, wherein, The battery assembly comprises a plurality of battery clusters arranged along the extension direction of the channel and a baffle arranged between the battery clusters.

7. An energy storage system according to any one of claims 1-5, wherein, The energy storage system further comprises a temperature control assembly communicating with the containing cavity, the temperature control assembly being used for regulating the temperature in the containing cavity.

8. An energy storage system according to claim 7, wherein, The temperature control assembly comprises an air conditioner and a ventilation duct, the ventilation duct being arranged in the containing cavity along the extension direction of the channel and provided with ventilation openings communicating with the containing cavity, the air conditioner communicating with the ventilation duct, and the air conditioner being used for delivering cold air / warm air to the ventilation duct.

9. An energy storage system according to claim 8, wherein, The number of ventilation openings is greater than or equal to two, and the ventilation openings are arranged at intervals along the extension direction of the channel.

10. An energy storage system according to any one of claims 1-5, wherein, The box body is further provided with an air inlet and an air outlet, the air inlet and the air outlet being opposite to each other along the extension direction of the channel, and the air inlet and the air outlet being in a closed state under normal conditions and being openable under thermal runaway conditions.

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