Energy storage system

Abstract

An energy storage system, comprising at least one sealing assembly which is internally provided with a flame-retardant medium, and a cooling and fire extinguishing apparatus which acts on the sealing assembly, wherein an energy storage unit is accommodated in the sealing assembly, and is immersed in the flame-retardant medium. The energy storage system has an effective fire protection capability by prioritizing prevention and combining prevention with extinguishment, reduces the fire risks of energy storage, and raises the fire safety level in energy storage, such that a sealing assembly in the energy storage system can be effectively protected, which is conducive to prolonging the service life of the energy storage system.

Description

Energy storage system Cross-reference to related applications

[0001] This application is based on Chinese Patent Application No. 2024104187398 entitled "Energy storage system" filed on April 8, 2024, and Chinese Patent Application No. 2024104193632 entitled "Energy storage system and its fire control method, device and computer equipment" filed on April 8, 2024, which are incorporated by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of energy storage, and in particular, to an energy storage system. BACKGROUND

[0003] With the development of energy storage technology, the types of energy storage devices are also increasing. Among them, the energy storage device usually includes multiple energy storage assemblies.

[0004] Considering that the components in the energy storage assembly are prone to thermal runaway under the conditions of short circuit, overcharge, overdischarge or thermal abuse, flammable gas or toxic gas is likely to be generated, which can easily lead to some safety problems. Therefore, how to reasonably set up the fire extinguishing system of the energy storage device is a problem to be solved. SUMMARY

[0005] In view of the above problems, the present application provides an energy storage system, which can solve the problem of how to reasonably set up the fire extinguishing system of the energy storage device in the related art.

[0006] In a first aspect, the present application provides an energy storage system, which includes at least one sealed assembly with built-in fire-retardant medium, and a cooling and fire extinguishing device acting on the sealed assembly; the sealed assembly contains an energy storage unit, and the energy storage unit is immersed in the fire-retardant medium.

[0007] In the embodiments of the present application, on the one hand, by immersing the energy storage unit in each sealed assembly in the fire-retardant medium, the combustion of thermal runaway smoke generated by the thermal runaway of the components in the sealed assembly can be effectively inhibited. On the other hand, by the way that the cooling and fire extinguishing device can output cooling and fire extinguishing medium to the sealed assembly, the sealed assembly that has thermal runaway can be extinguished and effectively cooled, which is conducive to blocking the thermal diffusion of the sealed assembly that has thermal runaway to its surroundings. Therefore, the energy storage system of the embodiments of the present application has effective fire extinguishing capability with prevention as the main and fire prevention and extinguishing combined, reduces the risk of energy storage fire, and improves the safety level of energy storage fire, so as to effectively protect the sealed assemblies in the energy storage system and improve the service life of the energy storage system.

[0008] In some embodiments, the energy storage system further comprises a fire-retardant firefighting device, the fire-retardant firefighting device comprises a first medium input pipe, the sealing assembly comprises a first input port connected with the first medium input pipe, so that the fire-retardant medium provided by the first medium input pipe can flow into the sealing assembly through the first input port, and the fire-retardant medium can be replenished on demand or dynamically, so that the combustion of thermal runaway smoke generated by the thermal runaway of the components in the sealing assembly can be effectively inhibited.

[0009] In some embodiments, the fire-retardant firefighting device further comprises a medium output pipe, and the sealing assembly further comprises a first output port connected with the medium output pipe, so that the fire-retardant medium in the sealing assembly can flow to the medium output pipe through the first output port, and the concentration of the fire-retardant medium can be ensured.

[0010] In some embodiments, the fire-retardant firefighting device further comprises a heat exchange assembly connected with the first input port and / or the first output port of the sealing assembly, so as to take away the heat in the fire-retardant medium flowing into the first input port and / or the heat in the fire-retardant medium discharged from the first output port, thereby reducing the temperature of the fire-retardant medium in the sealing assembly and improving the firefighting capability of the fire-retardant firefighting device.

[0011] In some embodiments, the cooling and fire extinguishing device comprises a second medium input pipe, and the sealing assembly comprises a second input port connected with the second medium input pipe, so that the cooling and fire extinguishing medium provided by the second medium input pipe can flow into the sealing assembly through the second input port, the thermal runaway of the sealing assembly can be extinguished and effectively cooled, thereby preventing failure and ensuring firefighting safety.

[0012] In some embodiments, the cooling and fire extinguishing device comprises a second medium input pipe connected with the first input port of the sealing assembly, so that the cooling and fire extinguishing medium provided by the second medium input pipe can flow into the sealing assembly through the first input port, and the thermal runaway of the sealing assembly can be extinguished and effectively cooled, thereby preventing the thermal runaway of the sealing assembly from further spreading heat to its surroundings. In addition, the cooling and fire extinguishing medium and the fire-retardant medium are transmitted in the sealing assembly through a shared pipeline, which has high integration, can reduce the volume of the sealing assembly, and can save costs.

[0013] In some embodiments, the cooling and fire extinguishing device further comprises a spray pipe arranged outside the sealing assembly, and the cooling and fire extinguishing medium is sprayed outside the sealing assembly through the spray pipe, so as to cool the outside of the sealing assembly, thereby preventing the thermal runaway of the sealing assembly from further spreading heat to its surroundings.

[0014] In some embodiments, the temperature-reducing fire extinguishing device further comprises a power assembly connected with the spray pipe, which can increase the kinetic energy of the temperature-reducing fire extinguishing medium output by the spray pipe, so that the spray pipe can spray the temperature-reducing fire extinguishing medium to a farther position, thereby increasing the fire-fighting range of the temperature-reducing fire extinguishing device.

[0015] In some embodiments, the energy storage system further comprises a fire-fighting controller connected with the fire-retardant fire extinguishing device and / or the temperature-reducing fire extinguishing device.

[0016] In the embodiments of the present application, the fire-fighting controller connected with the fire-retardant fire extinguishing device and / or the temperature-reducing fire extinguishing device can flexibly control the fire-retardant fire extinguishing device and / or the temperature-reducing fire extinguishing device, so as to realize the cooperative control of the fire-retardant fire extinguishing device and the temperature-reducing fire extinguishing device, thereby improving the fire-fighting capability of the energy storage system.

[0017] In some embodiments, the energy storage system further comprises a medium discharge assembly connected with the first output port of the sealing assembly, or the sealing assembly comprises a second output port, and the medium discharge assembly is connected with the second output port.

[0018] In the embodiments of the present application, by arranging the medium discharge assembly, the gas output by each sealing assembly can be discharged in the case of thermal runaway of any sealing assembly, so as to take away the sensible heat of the thermal runaway sealing assembly and the sensible heat of the thermal runaway flue gas, thereby reducing the wall surface temperature of the thermal runaway sealing assembly and reducing the radiation heat transfer between adjacent sealing assemblies, so as to reduce heat diffusion.

[0019] In some embodiments, the energy storage system further comprises a temperature-reducing fire extinguishing medium source connected with the temperature-reducing fire extinguishing device, so as to provide sufficient temperature-reducing fire extinguishing medium, thereby improving the fire-fighting capability of the temperature-reducing fire extinguishing device. In addition, by arranging the temperature-reducing fire extinguishing medium source, the length of the medium input pipe can be shortened, thereby facilitating rapid response to fire-fighting.

[0020] In some embodiments, the energy storage system further comprises a fire-retardant medium source connected with the fire-retardant fire extinguishing device, so as to provide sufficient fire-retardant medium, thereby improving the fire-fighting capability of the fire-retardant fire extinguishing device. In addition, by arranging the fire-retardant medium source, the length of the medium input pipe can be shortened, thereby facilitating rapid response to fire-fighting.

[0021] In some embodiments, the temperature-reducing fire extinguishing medium source is arranged outside the first preset distance range of the sealing assembly, so that the electronic devices in the temperature-reducing fire extinguishing medium source can normally operate, thereby ensuring the normal operation of the energy storage system.

[0022] In some embodiments, the fire-retardant medium source is arranged outside the first preset distance range of the sealing assembly, so that the electronic devices in the fire-retardant medium source can normally operate, thereby ensuring the normal operation of the energy storage system.

[0023] In some embodiments, the sealing assembly comprises at least one of an energy storage cabinet, an energy storage sub-module, a battery room, an energy storage container, an energy storage cabinet, an energy storage valve tower.

[0024] The above description is merely a summary of the application technical solutions, in order to more clearly understand the technical means of the application, and can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments, and are not meant to limit the application. Moreover, the same reference numerals in all the drawings represent the same or similar elements. In the drawings:

[0026] FIG. 1 is a front view structural schematic diagram of a high-voltage direct-hanging energy storage valve provided by an embodiment of the application;

[0027] FIG. 2 is a top view structural schematic diagram of a high-voltage direct-hanging energy storage valve provided by an embodiment of the application;

[0028] FIG. 3 is a structural schematic diagram of an electric cabinet provided by an embodiment of the application;

[0029] FIG. 4 is a structural schematic diagram of an energy storage system provided by some embodiments of the application;

[0030] FIG. 5 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0031] FIG. 6 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0032] FIG. 7 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0033] FIG. 8 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0034] FIG. 9 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0035] FIG. 10 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0036] FIG. 11 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0037] FIG. 12 is a structural schematic diagram of an energy storage system provided by another embodiment of the application;

[0038] Fig. 13 is a flow diagram of the fire-retardant medium of the electric cabinet according to an embodiment of the present application;

[0039] Fig. 14 is a flow diagram of the fire-retardant medium and the cooling and fire-extinguishing medium of the electric cabinet according to an embodiment of the present application;

[0040] Fig. 15 is a structural diagram of an energy storage system according to another embodiment of the present application;

[0041] Fig. 16 is a structural diagram of an energy storage system according to another embodiment of the present application;

[0042] Fig. 17 is a structural diagram of an energy storage system according to another embodiment of the present application;

[0043] Fig. 18 is a structural diagram of an energy storage system according to another embodiment of the present application;

[0044] Fig. 19 is a structural diagram of an energy storage system according to another embodiment of the present application;

[0045] Fig. 20 is a structural diagram of an energy storage system according to another embodiment of the present application;

[0046] Fig. 21 is a structural diagram of an energy storage system according to another embodiment of the present application;

[0047] Fig. 22 is a structural diagram of an energy storage system according to another embodiment of the present application. DETAILED DESCRIPTION

[0048] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0049] 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 the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "comprise" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two), unless otherwise explicitly specified.

[0051] With the development of energy storage technology, new high-voltage direct-hanging energy storage technology has the advantages of high modularization, good economic benefits, and high operation reliability by cascading energy storage modules into high voltage and directly hanging to AC power grid or DC power grid. The application of new high-voltage direct-hanging energy storage valves is increasing. Exemplarily, the high voltage involved in the embodiments of the present application can include but is not limited to 10KV and above voltage levels, and typical high-voltage voltage levels are, for example, 10KV, 35KV, 66KV, 500KV, 800KV, etc.

[0052] Generally, the high-voltage direct-hanging energy storage valve usually includes a plurality of energy storage assemblies, wherein the plurality of energy storage assemblies can be arranged in a multi-layer structure. Considering that the components (such as batteries, etc.) in the energy storage assemblies are prone to thermal runaway under conditions such as short circuit, overcharge, overdischarge, or thermal abuse, flammable gas (such as H2, hydrocarbon, CO, etc.) or toxic gas can be generated. If the thermal runaway gas of the battery reaches a certain concentration in the local space and encounters a fire source, a large-scale fire or even an explosion accident can occur, which poses a great challenge to the safety of the energy storage valve. Therefore, how to reasonably set up the fire extinguishing system of the energy storage device is a problem to be solved.

[0053] To solve the above problems, the present application provides a method for extinguishing fire of a sealed assembly in an energy storage system by suppressing the combustion of thermal runaway smoke generated by thermal runaway of components in the sealed assembly and outputting a cooling and fire extinguishing medium to the thermal runaway sealed assembly.

[0054] Based on the above considerations, the energy storage system provided by the embodiments of the present application can effectively suppress the combustion of thermal runaway smoke generated by thermal runaway of components in the sealed assembly by immersing the energy storage units in each sealed assembly in the fire-retardant medium. On the other hand, the cooling and fire extinguishing device can output a cooling and fire extinguishing medium to the sealed assembly, which can extinguish the fire and effectively cool the thermal runaway sealed assembly, which is beneficial to block the thermal diffusion of the thermal runaway sealed assembly to its surroundings. Therefore, the energy storage system of the present application has effective fire extinguishing capability, which is mainly prevention and combined with prevention and extinguishing, reduces the risk of energy storage fire, and improves the safety level of energy storage fire extinguishing, thereby effectively protecting the sealed assemblies in the energy storage system and improving the service life of the energy storage system.

[0055] Exemplarily, the energy storage system involved in the embodiments of the present application can be but is not limited to any one of the following: an energy storage cabinet (or simply referred to as a cabinet) system (house storage), an energy storage container system, or a high-voltage direct-hanging energy storage valve system.

[0056] For example, the sealing assembly involved in the embodiments of the present application can include, but is not limited to, at least one of an energy storage electric box (or simply referred to as an electric box), an energy storage electric cabinet, an energy storage sub-module, a battery room in an energy storage electric cabinet, an energy storage container, a battery room in a container, and an energy storage valve tower. The energy storage sub-module can include, but is not limited to, a plurality of energy storage electric cabinets connected in series or / and in parallel.

[0057] For example, when the sealing assembly is an energy storage electric box or a battery room, the energy storage system can be an energy storage cabinet system.

[0058] For example, when the sealing assembly is a container, an energy storage electric cabinet, a battery room sealed in the container, or a battery room sealed in the energy storage electric cabinet, the energy storage system can be an energy storage container system.

[0059] For example, when the sealing assembly is an energy storage electric cabinet or an energy storage valve tower in which energy storage sub-modules are cascaded, the energy storage system can be a high-voltage direct-hanging energy storage valve system.

[0060] As an example, the sealing assembly in the embodiments of the present application can paste two sealing strips with different cross sections on the door frame through a door frame molding structure to realize linear contact sealing and surface contact sealing, respectively. Meanwhile, the door plate is installed using a hinge structure, which can be repeatedly installed and is convenient to maintain. The compression amount of the sealing strip is controlled within an effective range to offset the processing deformation amount of the door plate, while realizing sealing and ensuring the service life of the sealing strip.

[0061] It should be noted that the sealing assembly involved in the embodiments of the present application can also be a non-energy storage assembly. Correspondingly, the system containing the sealing assembly can be a non-energy storage system.

[0062] It should be noted that, for the convenience of explanation, the energy storage system in the following embodiments of the present application is taken as an example of a high-voltage direct-hanging energy storage valve system to exemplarily introduce and explain the related content of the energy storage system. It should be understood that when the energy storage system in the embodiments of the present application is other types of systems, the implementation principles and technical effects are similar.

[0063] For the convenience of understanding, the related content of the high-voltage direct-hanging energy storage valve is first exemplarily introduced and explained in the embodiments of the present application.

[0064] FIG. 1 is a front view structural schematic diagram of a high-voltage direct- hanging energy storage valve provided by an embodiment of the present application, and FIG. 2 is a top view structural schematic diagram of the high-voltage direct-hanging energy storage valve provided by the embodiment of the present application. As shown in FIGS. 1 and 2, the high-voltage direct-hanging energy storage valve can include at least one energy storage valve tower (one energy storage valve tower is exemplarily shown in the figures), each energy storage valve tower can include a plurality of cascaded energy storage sub-modules (three energy storage sub-modules are exemplarily shown in the figures), and each energy storage sub-module can include a plurality of electric cabinets (nine electric cabinets are exemplarily shown in FIG. 2) and a control cabinet. The control cabinet can include, but is not limited to, a power module for controlling the switching state of the plurality of electric cabinets, and a control module for controlling the energy storage state of the energy storage sub-module. The plurality of energy storage sub-modules can be connected in series and / or in parallel, and can be supported by insulating sub, and generally form a multi-layer structure (or referred to as an energy storage valve tower).

[0065] FIG. 3 is a structural schematic diagram of an electric cabinet provided by an embodiment of the present application. As shown in FIG. 3, each electric cabinet in the embodiment of the present application can include, but is not limited to, a plurality of electric boxes (eight electric boxes are exemplarily shown in the electric cabinet in FIG. 3).

[0066] Of course, the high-voltage direct-hanging energy storage valve in the embodiment of the present application can also adopt other structures, which are not limited in the embodiment of the present application.

[0067] In some embodiments, FIG. 4 is a structural schematic diagram of an energy storage system provided by some embodiments of the present application. As shown in FIG. 4, the energy storage system in the embodiment of the present application can include at least one sealing assembly 40 with built-in fire-retardant medium, and a cooling and fire extinguishing device 41 acting on the sealing assembly 40. In the embodiment of the present application, each sealing assembly 40 can have a built-in fire-retardant medium.

[0068] The fire-retardant medium in the embodiment of the present application refers to a medium that can suppress combustion. The fire-retardant medium can include, but is not limited to, a gaseous fire-retardant medium or a liquid fire-retardant medium. Exemplarily, in the case of a gaseous fire-retardant medium, the fire-retardant medium can include, but is not limited to, an inert gas (for example, nitrogen, etc.). Exemplarily, in the case of a liquid fire-retardant medium, the fire-retardant medium can include, but is not limited to, an insulation type phase change cooling medium.

[0069] It should be noted that the fire-retardant medium in the embodiment of the present application can also be a vacuum, or can be other medium that can make the oxygen concentration of each sealing assembly lower than a preset concentration threshold, which will not be exemplarily illustrated one by one in the embodiment of the present application.

[0070] Exemplarily, the sealing assembly 40 in the embodiment of the present application can accommodate an energy storage unit (i.e., the sealing assembly 40 can also be referred to as an energy storage assembly), and due to the built-in fire-retardant medium in the sealing assembly 40, the energy storage unit in the sealing assembly 40 can be immersed in the fire-retardant medium, so that the oxygen concentration in the sealing assembly and / or the oxygen concentration in the energy storage unit is lower than a preset concentration threshold, which can effectively inhibit the combustion of thermal runaway smoke generated by the thermal runaway of components in the sealing assembly (for example, components such as batteries in the energy storage unit). The preset concentration threshold can include but is not limited to the lower explosive limit of thermal runaway smoke. Exemplarily, the preset concentration threshold can include but is not limited to 12%, preferably, the preset concentration threshold can include but is not limited to 5%, or 2%.

[0071] It should be understood that the energy storage unit in the embodiment of the present application can be completely immersed in the fire-retardant medium, or can be partially immersed in the fire-retardant medium, for example, the components in the energy storage unit that are prone to thermal runaway can be completely immersed in the fire-retardant medium, and the entire energy storage unit does not need to be completely immersed in the fire-retardant medium.

[0072] It should be noted that the sealing assembly 40 in the embodiment of the present application can include at least one energy storage unit, wherein the energy storage unit can also be configured as a sealed unit.

[0073] Exemplarily, the sealing assembly in the embodiment of the present application can include but is not limited to at least one of an energy storage cabinet (or simply referred to as an electric cabinet), an energy storage cabinet, an energy storage sub-module, a battery room in an energy storage cabinet, an energy storage container, a battery room in a container, and an energy storage valve tower.

[0074] Exemplarily, the energy storage unit in the embodiment of the present application can include at least one of a battery, an energy storage cabinet, a battery room, and an energy storage sub-module.

[0075] Exemplarily, the energy storage cabinet, the energy storage sub-module, the battery room, the energy storage container, and the energy storage valve tower in the embodiment of the present application can have the energy storage unit as a cabinet (battery pack), i.e., the sealing assembly accommodates a plurality of cabinets, which can be suitable for large-capacity energy storage. The sealing assembly as the upper level of the cabinet (battery pack) can greatly reduce the cost of the fire extinguishing system and save the pipeline.

[0076] Exemplarily, in order to meet the installation and maintenance of the cabinet, the sealing assembly door plate size is large, and at the same time meets the performance of fireproof and explosion-proof of the sealing assembly, the larger the volume, the more difficult the sealing, and the sealing of the sealing assembly needs to be designed separately to ensure that it does not leak under a certain positive pressure and meets the prevention requirement that the oxygen concentration is less than the preset concentration threshold.

[0077] It should be understood that different sealing assemblies require different flow rates to meet the requirements of the sealing assembly for the concentration of the fire-retardant medium. For example, for multiple sealing assemblies, different flow resistances need to be designed so that the concentration of the fire-retardant medium of the multiple sealing assemblies can meet the balance requirement, and the short circuit of the air path of part of the sealing assemblies can be avoided to cause the lack of fire-retardant medium. For another example, for a single sealing assembly, the diffusion of the thermal runaway gas, the risk of explosion of the sealing assembly, and the replacement efficiency of the fire-retardant medium need to be calculated to achieve fire safety and efficiency improvement.

[0078] It should be noted that the environment in which the sealing assembly 40 in the embodiments of the present application (i.e., the outside of the sealing assembly 40) can also be provided with a fire-retardant medium, so that the oxygen concentration in the energy storage system can be lower than the preset concentration threshold, and the combustion of the thermal runaway smoke generated by the thermal runaway of the components in the sealing assembly can be effectively inhibited.

[0079] In a possible implementation manner, the fire-retardant medium built in the sealing assembly 40 can be a medium pre-set in the sealing assembly 40 in the production process.

[0080] In another possible implementation manner, the fire-retardant medium built in the sealing assembly 40 can be a medium output to the sealing assembly 40 by the fire-retardant fire-fighting device in the running process of the energy storage system.

[0081] Of course, the fire-retardant medium built in the sealing assembly 40 can also be a medium set by other manners.

[0082] It should be noted that the sealing assemblies in the embodiments of the present application can be arranged in a single layer or in multiple layers in the energy storage system.

[0083] For ease of understanding, the following embodiments of the present application take the fire-retardant medium as an example of the gaseous fire-retardant medium and the liquid fire-retardant medium to exemplarily introduce and describe the related content of the immersion manner of the fire-retardant medium.

[0084] For example, in the case that the fire-retardant medium is a gaseous fire-retardant medium, and the sealing assembly is an electric box, an electric cabinet, or an energy storage valve tower, the inside of the sealing assembly can be immersed in the fire-retardant medium.

[0085] For another example, in the case that the fire-retardant medium is a gaseous fire-retardant medium, and the sealing assembly is an electric box, the outside of the sealing assembly can be immersed in the fire-retardant medium.

[0086] For another example, in the case that the fire-retardant medium is a liquid fire-retardant medium, and the sealing assembly is an electric cabinet or an energy storage valve tower, the inside and the outside of the sealing assembly can be both immersed in the fire-retardant medium.

[0087] Exemplarily, the cooling and fire extinguishing device 41 can be configured to output the cooling and fire extinguishing medium to the partial sealing assembly 40 and / or each sealing assembly 40 in the case that any sealing assembly occurs thermal runaway.

[0088] The cooling and fire extinguishing medium in the embodiments of the present application refers to a medium that can cool and extinguish fire. Exemplarily, the cooling and fire extinguishing medium can include but is not limited to high-efficiency cooling substances, for example, compressed air foam, deionized water, insulation type coolants, etc. Yet another exemplary, the cooling and fire extinguishing medium can include but is not limited to ordinary cooling substances, for example, water and other liquids.

[0089] In a possible implementation, the cooling and fire extinguishing device 41 in the embodiments of the present application can be configured to output the cooling and fire extinguishing medium to the inside of the sealing assembly that occurs thermal runaway (or simply referred to as the thermal runaway sealing assembly) in the case that any sealing assembly occurs thermal runaway, so as to extinguish fire and effectively cool the thermal runaway sealing assembly, thereby facilitating to block the thermal runaway sealing assembly from thermal diffusion to its surroundings.

[0090] It should be noted that the cooling and fire extinguishing device 41 can also output the cooling and fire extinguishing medium to the inside of the adjacent sealing assembly of the thermal runaway sealing assembly. Of course, the cooling and fire extinguishing device 41 can also output the cooling and fire extinguishing medium to the inside of each sealing assembly.

[0091] It should be understood that the thermal runaway of any sealing assembly involved in the embodiments of the present application can include but is not limited to the thermal runaway of any component in the sealing assembly.

[0092] In another possible implementation, the cooling and fire extinguishing device 41 in the embodiments of the present application can be configured to output the cooling and fire extinguishing medium to the outside of each sealing assembly 40 in the case that any sealing assembly occurs thermal runaway.

[0093] In another possible implementation, the cooling and fire extinguishing device 41 in the embodiments of the present application can be configured to output the cooling and fire extinguishing medium to the inside of the thermal runaway sealing assembly and to the outside of each sealing assembly 40 in the case that any sealing assembly occurs thermal runaway. It should be noted that the cooling and fire extinguishing device 41 can also output the cooling and fire extinguishing medium to the inside of the adjacent sealing assembly of the thermal runaway sealing assembly.

[0094] In the following embodiments of the present application, the related content of the cooling and fire extinguishing device 41 outputting the cooling and fire extinguishing medium is further introduced and described.

[0095] In a possible implementation, in the case of thermal runaway of any of the sealed assemblies, the cooling and fire extinguishing device 41 can output the cooling and fire extinguishing medium based on the fire extinguishing control instruction input by the user or the fire extinguishing control instruction sent by other equipment.

[0096] In another possible implementation, in the case of thermal runaway of any of the sealed assemblies, the cooling and fire extinguishing device 41 can automatically output the cooling and fire extinguishing medium.

[0097] For example, the cooling and fire extinguishing device 41 can be provided with an automatic valve (for example, a pressure valve or an electric valve, etc.), and in the case of thermal runaway of any of the sealed assemblies, the automatic valve can be automatically opened, so that the cooling and fire extinguishing device 41 can output the cooling and fire extinguishing medium.

[0098] For another example, the cooling and fire extinguishing device 41 can be provided with an openable isolation assembly (for example, an isolation film capable of being opened, etc.), and in the case of thermal runaway of any of the sealed assemblies, the isolation assembly can be automatically opened, so that the cooling and fire extinguishing device 41 can output the cooling and fire extinguishing medium.

[0099] Of course, in the case of thermal runaway of any of the sealed assemblies, the cooling and fire extinguishing device 41 can also output the cooling and fire extinguishing medium in other ways.

[0100] To sum up, the energy storage system in the embodiment of the present application comprises at least one sealed assembly with built-in fire-retardant medium, and a cooling and fire extinguishing device acting on the sealed assembly; the sealed assembly contains an energy storage unit, and the energy storage unit is immersed in the fire-retardant medium. It can be seen that, in the embodiment of the present application, on the one hand, by immersing the energy storage unit in the fire-retardant medium in each sealed assembly, the combustion of the thermal runaway smoke generated by the thermal runaway of the components in the sealed assembly can be effectively inhibited. On the other hand, by the way that the cooling and fire extinguishing device can output the cooling and fire extinguishing medium to the sealed assembly, the fire extinguishing and effective cooling of the sealed assembly with thermal runaway can be performed, which is conducive to breaking the thermal diffusion of the sealed assembly with thermal runaway to its surroundings. Therefore, the energy storage system in the embodiment of the present application has effective fire-fighting capability of prevention as the main and combination of prevention and fire fighting, reduces the fire risk of energy storage, improves the fire safety level of energy storage, so as to effectively protect the sealed assemblies in the energy storage system, and is conducive to improving the service life of the energy storage system.

[0101] In some embodiments, FIG. 5 is a structural schematic diagram of an energy storage system provided by another embodiment of the present application. As shown in FIG. 5, the energy storage system in the embodiment of the present application can further comprise a fire-retardant fire-fighting device 42, wherein the fire-retardant fire-fighting device 42 can be configured to provide fire-retardant medium, so that each sealed assembly can be immersed in the fire-retardant medium of the fire-retardant fire-fighting device 42.

[0102] Exemplarily, the fire extinguishing device 42 in the embodiments of the present applicationapplicationcomprise, but is not limited to, a first medium input pipe 420, wherein the first medium input pipe 420applicationbe configured to provide the fire-retardant medium. The sealing assembly 40 in the embodiments of the present applicationapplicationcomprise, but is not limited to, a first input port (not shown in FIG. 5) connected with the first medium input pipe 420, so that the fire-retardant medium provided by the first medium input pipe 420applicationflow into the sealing assembly 40 through the first input port, so that the fire-retardant mediumapplicationbe replenished on demand or dynamically, thereby effectively suppressing the combustion of the thermal runaway smoke generated by the thermal runaway of the components in the sealing assembly.

[0103] In a possible implementation, the sealing assemblies 40 in the embodiments of the present applicationapplicationbe connected in series through a first medium transmission pipe (not shown in FIG. 5), and the first medium input pipe 420applicationbe connected with the first input port of the first sealing assembly in the series of sealing assemblies, so that the fire-retardant medium provided by the first medium input pipe 420applicationflow into the sealing assemblies 40, and the pipe cost of the first medium input pipe 420 can be saved. Exemplarily, the first input port of any intermediate sealing assembly in the series of sealing assembliesapplicationbe connected with the first output port of the adjacent previous sealing assembly through the first medium transmission pipe, and the first medium transmission pipeapplicationbe used to transmit the fire-retardant medium.

[0104] In another possible implementation, the first medium input pipe 420 in the embodiments of the present applicationapplicationbe connected with the first input port of each sealing assembly 40, so that the fire-retardant medium provided by the first medium input pipe 420applicationflow into the sealing assemblies 40 quickly.

[0105] Of course, the first medium input pipe 420applicationbe connected with the sealing assemblies 40 in other manners.

[0106] It should be understood that the other end of the first medium input pipe 420applicationbe connected with a fire-retardant medium source or other device capable of providing the fire-retardant medium, so that the obtained fire-retardant mediumapplicationbe transmitted into the sealing assemblies 40. Exemplarily, the fire-retardant medium sourceapplicationcomprise, but is not limited to, a fire-retardant medium source for storing the fire-retardant medium, or a fire-retardant medium source for generating the fire-retardant medium.

[0107] In some embodiments, FIG. 6 is a structural schematic diagram of an energy storage system provided by another embodiment of the present application. On the basis of the above-mentioned embodiments, considering the circulating flow of the fire-retardant medium in the sealing assembly 40, the fire extinguishing device 42 in the embodiments of the present applicationapplicationfurther comprise a medium output pipe 421, and the sealing assembly 40applicationfurther comprise a first output port (not shown in FIG. 6) connected with the medium output pipe 421, so that the fire-retardant medium in the sealing assembly 40applicationflow into the medium output pipe 421 through the first output port, so as to realize the circulating flow of the fire-retardant medium, thereby being beneficial to guaranteeing the concentration of the fire-retardant medium.

[0108] It should be noted that, in the case that the fire-retardant medium in the sealing assembly 40 flows to the medium output pipe 421, the first medium input pipe 420 can input the fire-retardant medium into the sealing assembly 40, so that the energy storage unit in the sealing assembly can be continuously immersed in the fire-retardant medium.

[0109] In a possible implementation, the sealing assemblies 40 in the embodiments of the present application can be connected in series through the first medium transmission pipes, and the medium output pipe 421 can be connected with the first output port of the last sealing assembly in the series of sealing assemblies, so that, in the case that the fire-retardant medium in the sealing assemblies 40 can flow to the medium output pipe 421, the cost of the pipeline of the medium output pipe can be saved.

[0110] In another possible implementation, the medium output pipe 421 in the embodiments of the present application can be connected with the first output port of each sealing assembly 40, so that the fire-retardant medium in the sealing assemblies 40 can quickly flow to the medium output pipe 421.

[0111] Of course, the medium output pipe 421 can also be connected with the sealing assemblies 40 in other manners.

[0112] For example, the other end of the medium output pipe 421 in the embodiments of the present application can be connected with the first medium input pipe 420, so that the fire-retardant medium output by the medium output pipe 421 can flow to the first medium input pipe 420, and thus flow to the sealing assemblies 40 through the first medium input pipe 420 in a circulating manner. It should be noted that, in order to consider the quality of the fire-retardant medium provided by the first medium input pipe 420, the other end of the medium output pipe 421 can be connected with the first medium input pipe 420 through a filtering assembly, where the filtering assembly can filter out impurities in the fire-retardant medium.

[0113] For another example, the other end of the medium output pipe 421 in the embodiments of the present application can be connected with a fire-retardant medium source, so that the fire-retardant medium output by the medium output pipe 421 can be stored in the fire-retardant medium source. It should be noted that, in order to consider the quality of the fire-retardant medium stored in the fire-retardant medium source, the other end of the medium output pipe 421 can be connected with the fire-retardant medium source through a filtering assembly.

[0114] Of course, the medium output pipe 421 can also be indirectly connected with the first medium input pipe 420, or the fire-retardant medium source, through other assemblies (for example, a circulating assembly that can be used to provide circulating power, etc.).

[0115] Exemplarily, the electric box level sets the thermal runaway medium discharge pipeline and / or the explosion-proof structure, and the electric box level fire extinguishing configuration can be omitted. The cooling fire extinguishing device is needed to control the thermal runaway of the sealed assembly at the electric box level, and the thermal runaway is not diffused to the adjacent electric box of the sealed assembly, or the thermal runaway is controlled at the sealed assembly level, and the thermal runaway is not diffused to the adjacent sealed assembly, to balance the energy storage fire safety and economic loss.

[0116] In some embodiments, FIG. 7 is a structural schematic diagram of an energy storage system provided by another embodiment of the present application. On the basis of the above-mentioned embodiment, considering the temperature requirement of the fire-retardant medium in the sealed assembly 40, the fire-retardant fire extinguishing device 42 of the embodiment of the present application can further include a heat exchange assembly 422, wherein the heat exchange assembly 422 can be used to take away the heat of the fire-retardant medium in each sealed assembly. Exemplarily, the heat exchange assembly 422 can include but is not limited to an air conditioner or a fan.

[0117] The heat exchange assembly 422 in the embodiment of the present application can be connected with the first input port and / or the first output port of the sealed assembly 40, to take away the heat in the fire-retardant medium flowing into the first input port and / or the heat in the fire-retardant medium discharged from the first output port, so that the temperature of the fire-retardant medium in the sealed assembly can be reduced, and the fire extinguishing capacity of the fire-retardant fire extinguishing device can be improved.

[0118] In a possible implementation, in the case where each sealed assembly 40 in the embodiment of the present application is connected in series through the first medium transmission pipe, the heat exchange assembly 422 can be connected with the first input port of the first-end sealed assembly in the series connection sealed assembly, or connected with the first output port of the last-end sealed assembly in the series connection sealed assembly.

[0119] In another possible implementation, in the case where the first medium input pipe 420 in the embodiment of the present application is connected with the first input port of each sealed assembly 40 respectively, the heat exchange assembly 422 can be connected with the first medium input pipe 420. It should be understood that, in the case where the first medium input pipe 420 is connected with the medium output pipe 421, the heat exchange assembly 422 is also connected with the first output port of each sealed assembly 40 through the medium output pipe 421.

[0120] In another possible implementation, in the case where the medium output pipe 421 in the embodiment of the present application is connected with the first output port of each sealed assembly 40 respectively, the heat exchange assembly 422 can be connected with the medium output pipe 421. It should be understood that, in the case where the first medium input pipe 420 is connected with the medium output pipe 421, the heat exchange assembly 422 is also connected with the first input port of each sealed assembly 40 through the first medium input pipe 420.

[0121] In another possible implementation, the heat exchange assembly 422 can be connected to the first input port of each sealing assembly 40 through the first heat exchange pipe, or can be connected to the first output port of each sealing assembly 40 through the second heat exchange pipe.

[0122] Of course, the heat exchange assembly 422 can also be connected to the sealing assembly 40 in other manners.

[0123] In some embodiments, FIG. 8 is a structural schematic diagram of an energy storage system according to some other embodiments of the present application. On the basis of the above-mentioned embodiments, the cooling and fire extinguishing device 41 in the embodiments of the present application can include but is not limited to a second medium input pipe 410, wherein the second medium input pipe 410 can be configured to provide cooling and fire extinguishing medium, so as to extinguish fire and effectively cool the sealing assembly that has thermal runaway, which is beneficial to block the thermal diffusion of the sealing assembly that has thermal runaway to its surroundings, thereby preventing failure, firefighting action, and being beneficial to ensuring firefighting safety.

[0124] In a possible implementation, the second medium input pipe 410 in the embodiments of the present application can be connected to the first input port (not shown in FIG. 8) of the sealing assembly 40, so that the cooling and fire extinguishing medium provided by the second medium input pipe 410 can flow into the sealing assembly through the first input port.

[0125] For example, each sealing assembly 40 in the embodiments of the present application can be connected in series through a first medium transmission pipe (not shown in FIG. 8), and the second medium input pipe 410 can be connected to the first input port of the first sealing assembly in the series connection, so that the cooling and fire extinguishing medium provided by the second medium input pipe 410 can flow into each sealing assembly 40, and the pipe cost of the second medium input pipe 410 can be saved. It should be understood that the first medium transmission pipe can be used to transmit the fire-retardant medium and / or the cooling and fire extinguishing medium.

[0126] In the embodiments of the present application, each sealing assembly 40 can be connected to the fire-retardant firefighting device and the cooling and fire extinguishing device through the same medium transmission pipe, which can further save the pipe cost of the energy storage system.

[0127] For another example, the second medium input pipe 410 in the embodiments of the present application can be connected to the first input port of each sealing assembly 40, so that the cooling and fire extinguishing medium provided by the second medium input pipe 410 can quickly and accurately flow into each sealing assembly 40 that needs to be cooled and extinguished.

[0128] It can be seen that, in the present implementation, the cooling and fire extinguishing medium and the fire-retardant medium are transmitted in the sealing assembly through a common pipe, which has high integration, can reduce the volume of the sealing assembly, and can save costs.

[0129] In another possible implementation, the sealing assembly 40 in the embodiment of the present application can include a second input port (not shown in FIG. 8) connected with the second medium input pipe 410. The second medium input pipe 410 in the embodiment of the present application can be connected with the second input port of the sealing assembly 40, so that the cooling and fire extinguishing medium provided by the second medium input pipe 410 can flow into the sealing assembly through the second input port.

[0130] Exemplarily, the sealing assemblies 40 in the embodiment of the present application can be connected in series through a second medium transmission pipe (not shown in FIG. 8). The second medium input pipe 410 can be connected with the second input port of the first sealing assembly in the series connection of the sealing assemblies, so that the cooling and fire extinguishing medium provided by the second medium input pipe 410 can flow into the sealing assemblies 40, and the pipe cost of the second medium input pipe 410 can be saved. Exemplarily, the second input port of any intermediate sealing assembly in the series connection of the sealing assemblies can be connected with the second output port of the adjacent previous sealing assembly through the second medium transmission pipe. It should be understood that the first medium transmission pipe can be used to transmit the fire-retardant medium, and the second medium transmission pipe can be used to transmit the cooling and fire extinguishing medium.

[0131] It can be seen that, in the implementation, the sealing assemblies can be connected with the fire-retardant fire-fighting device and the cooling and fire extinguishing device through different medium transmission pipes, so that the output of the fire-retardant medium by the fire-retardant fire-fighting device and the output of the cooling and fire extinguishing medium by the cooling and fire extinguishing device can be more flexibly controlled, thereby facilitating the improvement of the fire-fighting effect of the energy storage system.

[0132] Exemplarily, the second medium input pipe 410 in the embodiment of the present application can be connected with the second input port of each sealing assembly 40, so that the cooling and fire extinguishing medium provided by the second medium input pipe 410 can quickly and accurately flow into the sealing assemblies 40 that need to be cooled and fire extinguished.

[0133] It should be understood that the other end of the second medium input pipe 410 can be connected with a cooling and fire extinguishing medium source or other equipment that can provide the cooling and fire extinguishing medium, so that the obtained cooling and fire extinguishing medium can be transmitted into the sealing assembly 40. Exemplarily, the cooling and fire extinguishing medium source can include, but is not limited to, a cooling and fire extinguishing medium source for storing the cooling and fire extinguishing medium, or a cooling and fire extinguishing medium source for generating the cooling and fire extinguishing medium.

[0134] In some embodiments, FIG. 9 is a structural schematic diagram of an energy storage system according to some other embodiments of the present application. In some cases, a cooling and fire extinguishing device 41 according to some embodiments of the present application can further include a spray pipe 411 arranged outside the sealed assembly, and the cooling and fire extinguishing medium can be sprayed outside the sealed assembly by the spray pipe 411 to cool the outside of the sealed assembly, thereby facilitating the blocking of further heat diffusion of the thermal runaway sealed assembly to its surroundings.

[0135] For example, each sealed assembly can be provided with a corresponding spray pipe 411, and different spray pipes 411 can be connected to a third medium transmission pipe (not shown in FIG. 9).

[0136] It should be understood that the other end of the third medium transmission pipe can be connected to the second medium input pipe, the cooling and fire extinguishing medium source, or other devices that can provide the cooling and fire extinguishing medium, so that the obtained cooling and fire extinguishing medium can be sprayed outside the sealed assembly by the spray pipe 411.

[0137] For another example, each sealed assembly can be provided with a corresponding spray pipe 411, and the other end of each spray pipe 411 can be connected to the second medium input pipe, the cooling and fire extinguishing medium source, or other devices that can provide the cooling and fire extinguishing medium.

[0138] In one possible implementation, the cooling and fire extinguishing medium output by the cooling and fire extinguishing device 41 to the outside of the sealed assembly can be the same as the cooling and fire extinguishing medium output to the inside of the sealed assembly.

[0139] In another possible implementation, considering that the amount of cooling and fire extinguishing medium output by the cooling and fire extinguishing device 41 to the inside of the sealed assembly is small and the fire extinguishing requirement is high, and the amount of cooling and fire extinguishing medium output by the cooling and fire extinguishing device 41 to the outside of the sealed assembly is large, the cooling and fire extinguishing medium output by the cooling and fire extinguishing device 41 to the outside of the sealed assembly can be different from the cooling and fire extinguishing medium output to the inside of the sealed assembly. For example, the cooling and fire extinguishing medium output by the cooling and fire extinguishing device to the inside of the sealed assembly can be a high-efficiency cooling substance, and the cooling and fire extinguishing medium output by the cooling and fire extinguishing device to the outside of the sealed assembly can be water or other ordinary cooling substances.

[0140] Further, in order to flexibly control the spraying direction of the cooling and fire extinguishing medium, the end of the spray pipe 411 according to some embodiments of the present application can be provided with a spray head (not shown in FIG. 9), wherein the spray head can be used to spray the cooling and fire extinguishing medium at a specific angle and pressure, so that each sealed assembly can be uniformly sprayed with the cooling and fire extinguishing medium.

[0141] In some embodiments, FIG. 10 is a structural schematic diagram of an energy storage system according to some embodiments of the present application. In order to improve the coverage of the sprayed cooling and fire extinguishing medium, the cooling and fire extinguishing device 41 according to some embodiments of the present application can further include a power assembly 412 connected to the spray pipe 411. For example, the power assembly 412 can be arranged between the cooling and fire extinguishing medium source or other device capable of providing the cooling and fire extinguishing medium and the spray pipe 411 (for ease of description, the power assembly is arranged between the cooling and fire extinguishing medium source and the spray pipe 411).

[0142] The power assembly according to some embodiments of the present application can drive the cooling and fire extinguishing medium in the cooling and fire extinguishing medium source to output the cooling and fire extinguishing medium to the outside of the sealing assembly through the spray pipe 411 in the case of thermal runaway of any sealing assembly. It can be seen that, according to some embodiments of the present application, the power assembly arranged between the cooling and fire extinguishing medium source and the spray pipe 411 can increase the kinetic energy of the cooling and fire extinguishing medium output by the spray pipe 411, so that the spray pipe 411 can spray the cooling and fire extinguishing medium to a relatively far position, which is beneficial to increase the fire extinguishing range of the cooling and fire extinguishing device.

[0143] Further, in order to improve the control flexibility of the spray pipe, the cooling and fire extinguishing device 41 according to some embodiments of the present application can further include an electric valve arranged between the cooling and fire extinguishing medium source or other device capable of providing the cooling and fire extinguishing medium and the spray pipe 411.

[0144] The electric valve according to some embodiments of the present application can control whether the spray pipe 411 outputs the cooling and fire extinguishing medium. It should be noted that the electric valve according to some embodiments of the present application can be used to control whether the pipeline is opened to flow through the cooling and fire extinguishing medium, and the default state thereof can be a closed state. In the case that the electric valve is in the closed state, the spray pipe 411 does not output the cooling and fire extinguishing medium; in the case that the electric valve is in the open state, the spray pipe 411 can output the cooling and fire extinguishing medium.

[0145] It can be seen that, according to some embodiments of the present application, the electric valve arranged between the cooling and fire extinguishing medium source and the spray pipe can more flexibly control the spray pipe.

[0146] Of course, the cooling and fire extinguishing device 41 according to some embodiments of the present application can further include other assemblies.

[0147] In some embodiments, FIG. 11 is a structural schematic diagram of an energy storage system according to some embodiments of the present application. The energy storage system according to the embodiments of the present application can further include a fire control controller 43 based on the above-mentioned embodiments. The fire control controller 43 can be connected to the fire-retardant fire-fighting device 42 and / or the cooling fire-fighting device 41. The fire control controller 43 can control the fire-retardant fire-fighting device 42 to output fire-retardant medium, and / or control the cooling fire-fighting device 41 to output cooling fire-fighting medium in the case where it is determined that thermal runaway occurs in any sealed assembly.

[0148] In the embodiments of the present application, the fire control controller connected to the fire-retardant fire-fighting device 42 and / or the cooling fire-fighting device 41 can flexibly control the fire-retardant fire-fighting device 42 and / or the cooling fire-fighting device 41, so as to realize the cooperative control of the fire-retardant fire-fighting device and the cooling fire-fighting device, and facilitate to improve the fire-fighting capability of the energy storage system.

[0149] In a possible implementation manner, the fire control controller 43 can be connected to the fire-retardant fire-fighting device 42 and the cooling fire-fighting device 41 respectively, that is, the fire control controller 43 is a common fire control controller of the fire-retardant fire-fighting device 42 and the cooling fire-fighting device 41. The fire control controller 43 can control the fire-retardant fire-fighting device 42 to output fire-retardant medium, and control the cooling fire-fighting device 41 to output cooling fire-fighting medium in the case where it is determined that thermal runaway occurs in any sealed assembly.

[0150] For example, the fire control controller 43 can determine whether thermal runaway occurs in any sealed assembly based on the detection information of the thermal runaway detection assembly. The thermal runaway detection assembly can be used to determine whether thermal runaway occurs in any sealed assembly by monitoring the gas composition discharged by each sealed assembly.

[0151] For another example, the fire control controller 43 can determine that thermal runaway occurs in any sealed assembly by receiving thermal runaway indication information sent by other devices (for example, a control device of the energy storage system, etc.). The thermal runaway indication information can include but is not limited to the identification information of the sealed assembly in which thermal runaway occurs in the energy storage system.

[0152] Of course, the fire control controller 43 can also determine the sealed assembly in which thermal runaway occurs in other manners.

[0153] In the embodiments of the present application, the fire-retardant fire-fighting device 42 and the cooling fire-fighting device 41 can realize fire-fighting linkage through the common fire control controller, so as to facilitate to further improve the fire-fighting capability of the energy storage system.

[0154] In another possible implementation, the fire control device 43 can be connected with the fire extinguishing device 42. In this case, the fire control device 43 can control the fire extinguishing device 42 to output the fire-retardant medium. It should be noted that the cooling fire extinguishing device 41 can be connected with other fire control devices or other devices (for example, a control device of the energy storage system).

[0155] In another possible implementation, the fire control device 43 can be connected with the cooling fire extinguishing device 41. In this case, the fire control device 43 can control the cooling fire extinguishing device 41 to output the cooling fire extinguishing medium when it is determined that any of the sealed assemblies is in thermal runaway. It should be noted that the fire-retardant fire extinguishing device 42 can be connected with other fire control devices or other devices (for example, a control device of the energy storage system).

[0156] In the embodiments of the present application, the fire-retardant fire extinguishing device 42 and the cooling fire extinguishing device 41 are respectively controlled by the corresponding fire control device, which can improve the control efficiency of the fire-retardant fire extinguishing device 42 and the cooling fire extinguishing device 41, thereby further improving the fire-fighting capability of the energy storage system.

[0157] In some embodiments, the energy storage system can further include a valve assembly configured to stop the fire-retardant fire extinguishing device 42 from supplying the fire-retardant medium to the first input port of the sealed assembly and configured to start the cooling fire extinguishing device 41 to act on the sealed assembly. For example, the valve assembly can include a first valve unit and a second valve unit. The first valve unit can be connected with the fire-retardant fire extinguishing device 42 and / or the first medium input pipe 420, used to stop the fire-retardant fire extinguishing device 42 and / or close the flow path of the first medium input pipe 420 to the first input port of the sealed assembly; the second valve unit can be used to start the cooling fire extinguishing device 41 or open the action channel of the cooling fire extinguishing device 41 to the sealed assembly.

[0158] In some embodiments, the valve assembly can be connected with the fire control device 43, and the fire control device 43 can send start / stop instructions to the valve assembly, and the valve assembly can execute the start / stop action.

[0159] In some embodiments, FIG. 12 is a structural schematic diagram of an energy storage system according to another embodiment of the present application. Based on the above-mentioned embodiments, the energy storage system according to the embodiment of the present application can further include a medium discharge assembly 44, so that when any of the sealed assemblies is in thermal runaway, the gas output by each of the sealed assemblies can be discharged to take away the sensible heat of the thermal runaway sealed assembly and the sensible heat of the thermal runaway flue gas, thereby reducing the wall temperature of the thermal runaway sealed assembly and reducing the radiation heat transfer between the adjacent sealed assemblies, so that the heat diffusion can be reduced.

[0160] In a possible implementation, the medium discharge assembly 44 can be connected with the first output port (not shown in FIG. 12) of the sealing assembly 40, so that in the case of thermal runaway of any sealing assembly, the mixture of the fire-retardant medium, the cooling and fire-extinguishing medium, and / or the thermal runaway flue gas and the like discharged by the sealing assembly can be discharged to take away the sensible heat of the thermal runaway sealing assembly and the sensible heat of the thermal runaway flue gas.

[0161] For example, in the case where the sealing assemblies 40 in the embodiments of the present application are connected in series through the first medium transmission pipe, the medium discharge assembly 44 can be connected with the first output port of the terminal sealing assembly in the series connection of the sealing assemblies, so that on the basis of discharging the gas discharged by each sealing assembly, the cost of the pipeline can also be saved. It should be understood that if the medium output pipe is connected with the first output port of the terminal sealing assembly in the series connection of the sealing assemblies, the medium discharge assembly 44 can be connected with the first output port of the terminal sealing assembly in the series connection of the sealing assemblies through the medium output pipe.

[0162] For another example, the medium output pipes in the embodiments of the present application can be respectively connected with the first output ports of the sealing assemblies 40, and the medium discharge assembly 44 can be connected with the first output ports of the sealing assemblies 40 through the medium output pipes.

[0163] For another example, the medium discharge assembly 44 can be connected with the first output ports of the sealing assemblies 40 through the first discharge pipes.

[0164] In another possible implementation, the sealing assembly 40 can include a second output port, and the medium discharge assembly 44 can be connected with the second output port, so that in the case of thermal runaway of any sealing assembly, the mixture of the cooling and fire-extinguishing medium and / or the thermal runaway flue gas and the like discharged by the sealing assembly can be discharged to take away the sensible heat of the thermal runaway sealing assembly and the sensible heat of the thermal runaway flue gas.

[0165] For example, in the case where the sealing assemblies 40 in the embodiments of the present application are connected in series through the second medium transmission pipe, the medium discharge assembly 44 can be connected with the second output port of the terminal sealing assembly in the series connection of the sealing assemblies, so that on the basis of discharging the gas discharged by each sealing assembly, the cost of the pipeline can also be saved. It should be understood that if the medium output pipe of the cooling and fire-extinguishing medium (or simply referred to as the cooling and fire-extinguishing medium output pipe) is connected with the second output port of the terminal sealing assembly in the series connection of the sealing assemblies, the medium discharge assembly 44 can be connected with the second output port of the terminal sealing assembly in the series connection of the sealing assemblies through the medium output pipe of the cooling and fire-extinguishing medium.

[0166] In another example, the medium output pipe of the cooling and fire extinguishing medium in the embodiment of the present application can be connected with the second output port of each sealing assembly 40 respectively, and the medium discharge assembly 44 can be connected with the second output port of each sealing assembly 40 through the medium output pipe of the cooling and fire extinguishing medium.

[0167] In another example, the medium discharge assembly 44 can be connected with the second output port of each sealing assembly 40 through the second discharge pipe respectively.

[0168] Of course, the medium discharge assembly 44 can also be connected with each sealing assembly through other ways.

[0169] For the convenience of understanding, in the following embodiments of the present application, the flow direction of the fire-retardant medium in the electrical cabinet is exemplarily introduced and described by taking the fire-retardant medium as the gaseous fire-retardant medium, the sealing assembly as the electrical cabinet, and the energy storage unit as the electrical box.

[0170] FIG. 13 is a flow diagram of the fire-retardant medium in the electrical cabinet according to an embodiment of the present application. As shown in FIG. 13, it is assumed that the electrical box 7 in the electrical cabinet occurs thermal runaway. Since the gaseous fire-retardant medium can enter the electrical cabinet from the first input port at the bottom of the electrical cabinet, the electrical cabinet is filled with the gaseous fire-retardant medium, so that the smoke generated by thermal runaway cannot be combusted, thereby preventing the combustion of the smoke generated by thermal runaway from generating heat again. In addition, the mixture of the gaseous fire-retardant medium and the smoke generated by thermal runaway can be discharged from the first output port at the top of the electrical cabinet, so as to discharge the smoke generated by thermal runaway outside the electrical cabinet in which thermal runaway occurs, and the flowing gaseous fire-retardant medium can take away the sensible heat of the smoke generated by thermal runaway.

[0171] For the convenience of understanding, in the following embodiments of the present application, the flow direction of the fire-retardant medium and the cooling and fire extinguishing medium in the electrical cabinet is exemplarily introduced and described by taking the fire-retardant medium as the gaseous fire-retardant medium, the sealing assembly as the electrical cabinet, and the energy storage unit as the electrical box.

[0172] FIG. 14 is a flow diagram of the fire-retardant medium and the cooling and fire extinguishing medium in the electrical cabinet according to an embodiment of the present application. As shown in FIG. 14, it is assumed that the electrical box 7 in the electrical cabinet occurs thermal runaway. Since the cooling and fire extinguishing medium can enter the electrical cabinet from the first input port at the bottom of the electrical cabinet, the high-temperature smoke and radiation heat continuously generated by the thermal runaway electrical box cannot be transmitted to the adjacent electrical boxes (such as the electrical box 6 and the electrical box 8), thereby preventing the heat diffusion between the electrical boxes. In addition, the mixture of the gaseous fire-retardant medium, the smoke generated by thermal runaway and the cooling and fire extinguishing medium can be discharged from the first output port at the top of the electrical cabinet, i.e., the sensible heat of the electrical core in the thermal runaway electrical box and the smoke generated by thermal runaway are discharged outside the thermal runaway electrical cabinet, so as to take away the sensible heat of the electrical core in the thermal runaway electrical box and the smoke generated by thermal runaway, thereby reducing the wall surface temperature of the thermal runaway electrical cabinet and reducing the radiation heat transfer between the adjacent electrical cabinets, so as to reduce the heat diffusion.

[0173] In some embodiments, Fig. 15 is a structural schematic diagram of an energy storage system according to some embodiments of the present application. In addition to the above embodiments, as shown in Fig. 15, the energy storage system according to embodiments of the present application can further comprise a cooling and fire extinguishing medium source 45 connected to the cooling and fire extinguishing device 41. The cooling and fire extinguishing medium source 45 can be configured to supply cooling and fire extinguishing medium to the cooling and fire extinguishing device 41, and can also be configured to store the cooling and fire extinguishing medium.

[0174] For example, the cooling and fire extinguishing medium source 45 can be connected to the first input port or the second input port of each sealed assembly 40 through the second medium input pipe in the fireproofing device 42, so that in the case of thermal runaway of any sealed assembly, the cooling and fire extinguishing medium can be output to the sealed assembly in thermal runaway, so as to extinguish the fire and effectively cool the sealed assembly in thermal runaway, thereby facilitating the blocking of thermal diffusion of the sealed assembly in thermal runaway to its surroundings.

[0175] Of course, the cooling and fire extinguishing medium source 45 can also be connected to the cooling and fire extinguishing device 41 in other ways.

[0176] In embodiments of the present application, the cooling and fire extinguishing medium source connected to the cooling and fire extinguishing device is configured to provide sufficient cooling and fire extinguishing medium, thereby facilitating the improvement of the fire-fighting capability of the cooling and fire extinguishing device. In addition, the configuration of the cooling and fire extinguishing medium source can also shorten the length of the medium input pipe, thereby facilitating rapid response to fire-fighting.

[0177] In the case of a high-voltage direct-hanging energy storage valve system of the energy storage system according to embodiments of the present application, due to electromagnetic interference caused by high voltage, the cooling and fire extinguishing medium source and / or other non-mechanical control electronic devices in the cooling and fire extinguishing device 41 can be arranged outside the first preset distance range of the sealed assembly, so that the high-voltage electromagnetic interference does not affect the electronic devices in the cooling and fire extinguishing device 41, so that the electronic devices in the cooling and fire extinguishing device 41 can operate normally, thereby facilitating the normal operation of the energy storage system. The first preset distance range can be a distance threshold value at which the high-voltage electromagnetic interference does not affect the electronic devices.

[0178] In some embodiments, the energy storage system can also be a high-voltage energy storage system, and a centralized fire-fighting system can be used, i.e., a plurality of sealed assemblies share a set of fireproofing and cooling and fire extinguishing devices. The set of devices can be placed in a device room outside the first preset distance range of the sealed assembly, so as to facilitate independent power supply for fire-fighting. The thermal runaway detection assembly for detecting whether the sealed assembly is in thermal runaway is also arranged in the device room, and can be powered by an independent power supply different from the power supply of the secondary equipment of the energy storage system, such as commercial power, so as to meet the independent power supply of the thermal runaway detection assembly and reduce the influence of electromagnetic interference caused by high voltage on the thermal runaway detection assembly, thereby facilitating the increase of fire-fighting reliability.

[0179] Exemplarily, the thermal runaway detection assembly can be located outside the first preset distance range, detect the medium of the sealing assembly in the current period through the medium output pipe, and obtain the medium parameter, which can represent whether thermal runaway occurs in the sealing assembly, and can include but is not limited to medium composition, concentration, temperature, etc.

[0180] In some embodiments, the fire control controller can also be connected to the thermal runaway detection assembly and the medium discharge assembly. After obtaining the medium parameter of the thermal runaway detection assembly, the fire control controller can determine whether to start the cooling and fire extinguishing device to cool and extinguish the fire of the sealing assembly, or determine whether to start the medium discharge assembly to discharge the thermal runaway medium, so as to reduce the risk of explosion of the sealing assembly.

[0181] Exemplarily, the fire control controller can stop the supply of the fire-retardant medium of the fire-retardant device to the sealing assembly and start the cooling and fire extinguishing device when the thermal runaway information of the battery cell is obtained. Exemplarily, before stopping the supply of the fire-retardant medium, the medium discharge assembly can be started, and after running for a preset time, it is determined whether the thermal runaway is stopped. If not, the cooling and fire extinguishing device is started. Exemplarily, when the medium discharge assembly is started, the flow of the fire-retardant medium delivered by the fire-retardant device to the sealing assembly can also be increased at the same time, so as to further reduce the oxygen content of the sealing assembly and accelerate the replacement of the thermal runaway medium. Exemplarily, the thermal runaway information of the battery cell can include but is not limited to the voltage, temperature, and number of abnormalities of the battery cell obtained from the energy storage management system, or the thermal runaway medium parameters such as the medium temperature, the discharge concentration of the thermal runaway medium, and the discharge duration of the thermal runaway medium obtained from the thermal runaway detection assembly.

[0182] In some embodiments, FIG. 16 is a structural schematic diagram of an energy storage system provided by another embodiment of the present application. On the basis of the above-mentioned embodiments, as shown in FIG. 16, the energy storage system of the embodiment of the present application can further include a fire-retardant medium source 46 connected to the fire-retardant device 42, wherein the fire-retardant medium source 46 can be used to provide the fire-retardant medium for the fire-retardant device 42 and can also be used to store the fire-retardant medium.

[0183] Exemplarily, the fire-retardant medium source 46 can be connected to the first input port of each sealing assembly 40 through the first medium input pipe in the fire-retardant device 42, so that in the case that the fire-retardant medium in each sealing assembly 40 is insufficient, the required fire-retardant medium can be obtained from the fire-retardant medium source 46.

[0184] Exemplarily, the fire-retardant medium source 46 can be connected to the first output port of each sealing assembly 40 through the medium output pipe in the fire-retardant device 42, so that the fire-retardant medium output by the first output port of each sealing assembly 40 can be stored in the fire-retardant medium source 46.

[0185] Of course, the fire-retardant medium source 46 can also be connected to the fire-retardant fire-fighting device 42 in other ways.

[0186] In the embodiments of the present application, the fire-retardant medium source connected to the fire-retardant fire-fighting device is provided, so that sufficient fire-retardant medium can be provided, thereby facilitating the improvement of the fire-fighting capability of the fire-retardant fire-fighting device. In addition, by providing the fire-retardant medium source, the length of the medium input pipe can be shortened, thereby facilitating rapid response to fire-fighting.

[0187] Considering that in the case of the energy storage system of the embodiments of the present application being a high-voltage direct-hanging energy storage valve system, due to the existence of electromagnetic interference of high voltage, the fire-retardant medium source and / or other non-mechanical control electronic devices in the fire-retardant fire-fighting device 42 in the embodiments of the present application can be arranged outside the first preset distance range of the sealed assembly, so that the high-voltage electromagnetic interference will not affect the electronic devices in the fire-retardant fire-fighting device 42, so that the electronic devices in the fire-retardant fire-fighting device 42 can operate normally, thereby facilitating the protection of the normal operation of the energy storage system.

[0188] In some embodiments, FIG. 17 is a structural schematic diagram of an energy storage system provided by another embodiment of the present application. On the basis of the above-mentioned embodiments, as shown in FIG. 17, the related content of the energy storage system is further exemplarily introduced and described in the embodiments of the present application taking the fire-retardant medium as an inert gas. As shown in FIG. 17, the energy storage system of the embodiments of the present application can include but is not limited to: a plurality of sealed assemblies 40, a fire-retardant fire-fighting device 42, a fire-fighting controller 43, a medium discharge assembly 44 and a fire-retardant medium source 46.

[0189] Exemplarily, the medium discharge assembly 44 can include but is not limited to a mode switching valve; wherein the mode switching valve can be used to control the operation mode (for example, a circulation mode or a displacement mode) of the energy storage system, and can include but is not limited to an electrically operated three-way valve, wherein the electrically operated three-way valve can include a circulation mode or a displacement mode.

[0190] Exemplarily, the fire-retardant fire-fighting device 42 can include a first medium input pipe 420, a medium output pipe 421, a thermal runaway detection assembly 423, a circulation assembly 424 and a filtering assembly 425.

[0191] Exemplarily, the thermal runaway detection assembly 423 can be connected to the first output port of each sealed assembly 40 through the medium output pipe 421, so as to monitor the gas composition discharged by each sealed assembly to determine whether the thermal runaway of the sealed assembly occurs. The thermal runaway detection assembly 423 can also be connected to the circulation assembly 424 and the fire-fighting controller 43.

[0192] The circulation assembly 424 is connected to the fire-retardant medium source 46 through the filtering assembly 425 and the medium discharge assembly 44 in sequence, and the fire-retardant medium source 46 is connected to the first input port of each sealing assembly 40 through the first medium input pipe 420. For example, when the fire-retardant medium is a gaseous fire-retardant medium, the circulation assembly 424 can include but is not limited to a circulating fan.

[0193] For example, the fire-retardant medium source 46 in the embodiment of the application can include but is not limited to a noble gas generator, a noble gas storage tank, a pressure reducing valve and a noble gas pressure stabilizing tank connected in sequence.

[0194] It should be noted that the thermal runaway detection assembly 423 is connected to the fire control controller 43, so that the detection information can be sent to the fire control controller 43, so that the fire control controller 43 can determine whether thermal runaway occurs in the sealing assembly in the energy storage system according to the detection information. In addition, the fire control controller 43 is also connected to the medium discharge assembly 44, so that the medium discharge assembly 44 can be controlled to be adjusted from the circulation mode to the replacement mode when it is determined that thermal runaway occurs in any sealing assembly.

[0195] In a possible implementation, when no thermal runaway occurs in the sealing assembly in the energy storage system, the fire control controller 43 can control the medium discharge assembly 44 to be in the circulation mode, and the circulation assembly 424 can drive the noble gas in the pipeline to flow from the noble gas pressure stabilizing tank, pass through each sealing assembly in the energy storage system, the thermal runaway detection assembly 423, the filtering assembly 425 and the medium discharge assembly 44, and then return to the noble gas pressure stabilizing tank. It should be understood that each sealing assembly in the energy storage system is filled with noble gas and is guaranteed to have a certain pressure, so that the inside of the sealing assembly can always be in a state of extremely low oxygen concentration.

[0196] The thermal runaway detection assembly 423 can be used to determine whether thermal runaway occurs in the sealing assembly in the energy storage system by monitoring the composition of the gas in the pipeline. The filtering assembly 425 can be used to filter impurities that can exist in the pipeline.

[0197] In another possible implementation, in the case that thermal runaway occurs in any sealed assembly in the energy storage system, the thermal runaway smoke can flow through the thermal runaway detection assembly 423 along with the inert gas, so that the thermal runaway detection assembly 423 can send the detection information about the thermal runaway to the fire control controller 43. Further, the fire control controller 43 can control the medium discharge assembly 44 to switch from the circulation mode to the displacement mode, so that the inert gas pipeline is in communication with the outside, to discharge the inert gas and the thermal runaway smoke and the like output by the medium discharge assembly 44 to the outside. At this time, the pressure inside the pipeline and the inert gas pressure stabilizing tank decreases, the pressure reducing valve opens, and the inert gas tank continues to release the inert gas, so as to displace the thermal runaway smoke in the energy storage system, thereby completely removing the thermal runaway smoke from the energy storage system.

[0198] It should be noted that the circulation assembly 424 can drive the fire-retardant medium in each sealed assembly to flow from the first output port to the medium output pipe 421 at this time, and the thermal runaway smoke can be discharged from the first output port, so as to take away the sensible heat of the thermal runaway smoke, reduce the temperature of the fire-retardant medium in the thermal runaway sealed assembly, and reduce the heating effect on the adjacent sealed assembly of the thermal runaway sealed assembly, thereby facilitating the improvement of the fireproof effect of the fire-retardant medium.

[0199] It should be understood that after the fire-fighting displacement is completed, the inert gas generator can supplement the inert gas for the inert gas storage tank, and realize maintenance-free during the maintenance period. In addition, in the case that there is a leakage in the energy storage system and / or the pipeline, the inert gas generator and the inert gas storage tank can also continuously maintain the positive pressure of the pipeline.

[0200] In summary, in the embodiments of the present application, the inert gas is circulated in each sealed assembly in the energy storage system, so that the oxygen concentration in each sealed assembly is lower than the preset concentration threshold, which can effectively inhibit the combustion of the thermal runaway smoke generated by the thermal runaway component in the thermal runaway sealed assembly. Further, the thermal runaway smoke can be discharged in a directional manner by circulating the inert gas. It can be seen that the embodiments of the present application can realize that the thermal runaway smoke generated by the thermal runaway component in the thermal runaway sealed assembly does not catch fire and is discharged in a directional manner.

[0201] In some embodiments, FIG. 18 is a structural schematic diagram of an energy storage system according to some embodiments of the present application. Based on the above embodiments, the present embodiments take the liquid fire-retardant medium as an example to further illustrate the related content of the energy storage system. As shown in FIG. 18, the energy storage system according to the present embodiments can include but is not limited to a plurality of sealed assemblies 40, a fire-retardant firefighting device 42, and a fire-retardant medium source 46. The fire-retardant firefighting device 42 can include a first medium input pipe 420, a medium output pipe 421, a heat exchange assembly 422, and a circulating assembly 424. For example, in the case of a liquid fire-retardant medium, the circulating assembly 424 can include but is not limited to a circulating pump.

[0202] For example, one end of the circulating assembly 424 can be connected to the first output port of each sealed assembly through the medium output pipe 421, the other end of the circulating assembly 424 can be connected to one end of the fire-retardant medium source 46, and the other end of the fire-retardant medium source 46 can be connected to the first input port of each sealed assembly through the heat exchange assembly 422. The heat exchange assembly 422 can be connected to the first input port of each sealed assembly through the first medium input pipe 420.

[0203] The heat exchange assembly 422 in the present embodiments can take away the heat in the fire-retardant medium flowing into the input port of each sealed assembly.

[0204] The circulating assembly 424 in the present embodiments can circulate the fire-retardant medium discharged from the first output port of each sealed assembly to flow to the fire-retardant medium source 46, the fire-retardant medium provided by the fire-retardant medium source 46 can flow to the first input port of each sealed assembly, and the fire-retardant medium in each sealed assembly can flow from the first input port to the first output port.

[0205] It can be seen that each sealed assembly in the present embodiments is immersed in the liquid fire-retardant medium, which not only can effectively suppress the combustion of the thermal runaway smoke generated by the thermal runaway components in the thermal runaway sealed assembly, but also can effectively cool the thermal runaway components in the thermal runaway sealed assembly to block the thermal diffusion of the thermal runaway components to the inside of the thermal runaway sealed assembly or the thermal diffusion of the thermal runaway sealed assembly to the surrounding. For example, in the case of a battery cell as the thermal runaway component, the present embodiments can effectively cool the thermal runaway battery box to which the thermal runaway cell belongs, and can block the thermal diffusion of the thermal runaway cell to the inside of the thermal runaway battery box or the thermal diffusion of the thermal runaway battery box to the adjacent battery box in the same electric cabinet or the thermal diffusion of the thermal runaway battery cabinet to the adjacent battery cabinet.

[0206] Of course, the fire-retardant firefighting device 42 can also include other components, such as a filtering assembly for filtering impurities in the fire-retardant medium arranged between the circulating assembly 424 and the fire-retardant medium source 46, etc.

[0207] In summary, in the embodiments of the present application, by using the immersion cooling technology, each sealed assembly in the energy storage system is immersed in a liquid fire-retardant medium. This not only effectively suppresses the combustion of thermal runaway smoke generated by the thermal runaway components in the thermal runaway sealed assembly, but also effectively cools the thermal runaway components in the thermal runaway, thereby preventing the thermal runaway components from thermal diffusion to the inside of the thermal runaway sealed assembly or the thermal diffusion of the thermal runaway sealed assembly to the surrounding.

[0208] In some embodiments, FIG. 19 is a structural schematic diagram of an energy storage system according to some other embodiments of the present application. Based on the above embodiments, the present embodiments take the output of the cooling and fire extinguishing medium from the cooling and fire extinguishing device 41 to the inside of the sealed assembly as an example to further exemplarily introduce and describe the related content of the energy storage system. As shown in FIG. 19, the energy storage system according to the present embodiments can include but is not limited to a plurality of sealed assemblies 40, a cooling and fire extinguishing device, a fire control controller 43, a medium discharge assembly 44, and a cooling and fire extinguishing medium source 45.

[0209] Exemplarily, the cooling and fire extinguishing device can include a second medium input pipe 410 and a cooling and fire extinguishing medium output pipe 413.

[0210] Exemplarily, the medium discharge assembly 44 can be used to control whether the pipeline is opened to discharge the thermal runaway smoke, etc., and can include but is not limited to an electric valve, wherein the electric valve can include but is not limited to an open state or a closed state. It should be noted that the default state of the medium discharge assembly 44 in the present embodiments is the closed state.

[0211] Exemplarily, the cooling and fire extinguishing medium source 45 in the present embodiments can include but is not limited to a connected fire extinguishing agent storage tank and a fire extinguishing agent generating device. The fire extinguishing agent storage tank can be used to store foam liquid, and the fire extinguishing agent generating device can be used to process the foam liquid in the fire extinguishing agent storage tank to generate foam state fire extinguishing agent. For example, the fire extinguishing agent generating device can include but is not limited to an air compressor and a mixing tank, wherein the foam liquid can be reacted with compressed air to form pressure air foam, and the pressure air foam can enter the inside of each sealed assembly through the pipeline.

[0212] Exemplarily, the cooling and fire extinguishing medium source 45 can be connected to the second input port of each sealed assembly through the second medium input pipe 410, the medium discharge assembly 44 can be connected to the second output port of each sealed assembly through the cooling and fire extinguishing medium output pipe 413, and the fire control controller 43 can be connected to the cooling and fire extinguishing medium source 45 and the medium discharge assembly 44, respectively.

[0213] In a possible implementation, the fire control controller 43 can determine, in a case where the heat runaway indication information is received, that a component in a sealed assembly in the energy storage system has heat runaway, and on one hand, can control the cooling and fire extinguishing medium source 45 to output cooling and fire extinguishing medium to the inside of the heat runaway sealed assembly, and on the other hand, can control the medium discharge assembly 44 to adjust from the closed state to the open state, so that the heat runaway smoke and air foam after fire extinguishing of the heat runaway component in the heat runaway energy storage assembly can be discharged to the outside environment.

[0214] To sum up, in the embodiments of the present application, when the heat runaway component in the heat runaway sealed assembly diffuses inside the heat runaway sealed assembly or the heat runaway sealed assembly diffuses heat to the surrounding, the cooling and fire extinguishing medium can be sprayed into the heat runaway sealed assembly, so as to effectively cool the heat runaway component in the heat runaway sealed assembly, so as to block the heat diffusion of the heat runaway component inside the heat runaway sealed assembly or the heat diffusion of the heat runaway sealed assembly to the surrounding.

[0215] For example, in a case where the heat runaway component is a battery cell, the embodiments of the present application can effectively cool the heat runaway electric cabinet to which the heat runaway battery cell belongs, and can block the heat diffusion of the heat runaway battery cell inside the heat runaway electric cabinet, or the heat diffusion of the heat runaway electric cabinet to the adjacent electric cabinet in the same electric cabinet, or the heat diffusion of the heat runaway electric cabinet to the adjacent electric cabinet, so as to control the heat diffusion at the electric cabinet level.

[0216] In some embodiments, in order to save space, the sealed assemblies in the energy storage system in the embodiments of the present application can adopt a multi-layer arrangement. For example, the energy storage system can include a plurality of multi-layer energy storage mechanisms, wherein each energy storage mechanism can include a plurality of connected sealed assemblies.

[0217] For example, in a case where the sealed assembly is an electric cabinet, the corresponding energy storage mechanism can be an energy storage sub-module. For example, in a case where the sealed assembly is an electric cabinet, the corresponding energy storage mechanism can be an electric cabinet. For example, in a case where the sealed assembly is an energy storage sub-module, the corresponding energy storage mechanism can be an energy storage tower.

[0218] For example, the multi-layer energy storage mechanisms can be fixed by an insulating support or the like to form a multi-layer structure.

[0219] In a possible implementation, the sealed assemblies in the multi-layer energy storage mechanisms in the energy storage system can all be connected with the same cooling and fire extinguishing device, that is, all the sealed assemblies in all the energy storage mechanisms share the same cooling and fire extinguishing device. For example, the sealed assemblies in all the energy storage mechanisms can be connected with the same cooling and fire extinguishing device through corresponding pipelines. In this implementation, the cooling and fire extinguishing device is shared by all the sealed assemblies, which can save the cost of the energy storage system.

[0220] In another possible implementation, each sealing assembly in different layers of energy storage mechanisms in the energy storage system is connected to the cooling and fire extinguishing device of the corresponding layer, that is, different layers of energy storage mechanisms correspond to different layers of cooling and fire extinguishing devices, and all sealing assemblies in each layer of energy storage mechanism can share the cooling and fire extinguishing device of the corresponding layer. In this implementation, the cooling and fire extinguishing device can be flexibly arranged and controlled, and the fire-fighting capability of the cooling and fire extinguishing device can be improved.

[0221] In some embodiments, FIG. 20 is a structural schematic diagram of an energy storage system according to some other embodiments of the present application. Based on the above embodiments, the energy storage system in the embodiments of the present application is a high-pressure direct-hanging energy storage valve system, and the cooling and fire extinguishing device 41 outputs cooling and fire extinguishing medium to the outside of the sealing assembly. The energy storage system is further exemplarily described. For the high-pressure energy storage valve placed indoors, the cooling and fire extinguishing medium is output to the outside of the sealing assembly, heat diffusion from the sealing assembly to the adjacent sealing assembly is prevented, and the support of the sealing assembly is cooled to reduce the influence of temperature on the strength of the support.

[0222] As shown in FIG. 20, the energy storage system according to the embodiments of the present application can include but is not limited to a plurality of sealing assemblies 40, a cooling and fire extinguishing device 41, a fire control controller 43, and a cooling and fire extinguishing medium source 45. The sealing assembly 40 can include but is not limited to an energy storage sub-module.

[0223] Exemplarily, the cooling and fire extinguishing device 41 can include a third medium input pipe 414, a plurality of spray pipes 411, a power assembly 412, and an electric valve 415.

[0224] Exemplarily, the plurality of spray pipes 411 can be arranged outside the energy storage sub-module of the high-pressure direct-hanging energy storage valve. The cooling and fire extinguishing medium source 45 can be connected to each spray pipe 411 through the power assembly 412 and the electric valve 414. The cooling and fire extinguishing medium source 45 and each spray pipe 411 can be connected through the third medium input pipe 414. The fire control controller 43 can be connected to the power assembly 412 and the electric valve 415.

[0225] Exemplarily, in order to flexibly control the spraying direction of the cooling and fire extinguishing medium, the end of the spray pipe 411 in the embodiments of the present application can be provided with a spray head.

[0226] The spray head in the embodiment of the present application mainly sprays the cooling and fire extinguishing medium at a specific angle and pressure, so that all components in the high-pressure direct-hanging energy storage valve can be uniformly sprayed with the cooling and fire extinguishing medium for thermal isolation and cooling. The setting positions and / or spray angles of the spray heads can meet the requirements that the frame, insulator and cabinet shell of the high-pressure direct-hanging energy storage valve can be sprayed with the cooling and fire extinguishing medium, and the spray flow can meet the cooling requirements.

[0227] For example, as shown in FIG. 20, a plurality of spray pipes 411 corresponding to each energy storage sub-module in the high-pressure direct-hanging energy storage valve can be arranged around the energy storage sub-module, so that the cooling and fire extinguishing medium can be uniformly sprayed on the frame and insulator of the energy storage sub-module.

[0228] It should be noted that, in order to facilitate drawing, FIG. 20 illustrates the case that the high-pressure direct-hanging energy storage valve includes one energy storage valve tower. In the case that the high-pressure direct-hanging energy storage valve includes a plurality of energy storage valve towers, the number of corresponding spray heads and electric valves can match the number of valve towers, so that all components in the high-pressure direct-hanging energy storage valve can be uniformly sprayed with the cooling and fire extinguishing medium.

[0229] For example, one electric valve can be arranged corresponding to each energy storage valve tower in the high-pressure direct-hanging energy storage valve, so that the spray pipes 411 in the corresponding energy storage valve tower can output the cooling and fire extinguishing medium by controlling the electric valve of the corresponding energy storage valve tower.

[0230] For another example, in order to improve the flexibility of controlling the spray pipes 411, one electric valve can be arranged corresponding to each energy storage sub-module in each energy storage valve tower in the high-pressure direct-hanging energy storage valve, so that the spray pipes 411 corresponding to the energy storage sub-module can output the cooling and fire extinguishing medium by controlling the electric valve of the corresponding energy storage sub-module.

[0231] Of course, the electric valves in the embodiment of the present application can also be arranged in other ways, which will not be illustrated one by one in the embodiment of the present application.

[0232] For example, the cooling and fire extinguishing medium source 45 in the embodiment of the present application can be used to store the cooling and fire extinguishing medium.

[0233] In a possible implementation, the fire control controller 43 can determine, in a case where the heat runaway indication information is received, that heat runaway occurs in a component in the sealing assembly in the high-voltage direct-hanging energy storage valve, accurately locate the energy storage valve tower to which the heat runaway sealing assembly belongs, control the electric valve 415 corresponding to the heat runaway energy storage valve tower to be adjusted from the closed state to the open state, and control the power assembly 412 to provide circulating power so that the cooling and fire extinguishing medium in the cooling and fire extinguishing medium source 45 can be circulated to each spray pipe 411 corresponding to the heat runaway energy storage valve tower to be sprayed, so as to spray and cool the heat runaway energy storage valve tower. Not only can the wall surface temperature of the heat runaway electric cabinet in the heat runaway energy storage valve tower be reduced, the radiation heat transfer between adjacent electric cabinets can be reduced, and heat diffusion can be reduced, but also the metal frame and insulators of the energy storage valve tower can be cooled, so as to prevent strength deformation under the action of thermal stress, thereby reducing the risk of collapse of the energy storage valve, and the stability of the energy storage valve can be improved.

[0234] To sum up, in the embodiment of the present application, when the heat runaway electric cabinet in the heat runaway electric cabinet spreads to the adjacent electric cabinet, the cooling medium is directed to spray the heat runaway valve tower, so that the steel structure of the energy storage valve tower, the surface of the sealed electric cabinet and the insulator of the support can be cooled, the effective cooling of the support of the energy storage valve tower and the heat diffusion between different electric cabinets and different sub-modules in the heat runaway electric cabinet are realized, and the normal operation of the energy storage valve body is protected.

[0235] It should be noted that, considering that the energy storage system in the embodiment of the present application is a high-voltage direct-hanging energy storage valve system, because of the electromagnetic interference of high voltage, the cooling and fire extinguishing medium source 45 and part of the components (such as the power assembly 412 and the electric valve 415) of the cooling and fire extinguishing device 41 in the embodiment of the present application can be arranged outside the first preset distance range of the sealing assembly in the high-voltage direct-hanging energy storage valve, so that the high-voltage electromagnetic interference does not affect the electronic components in the cooling and fire extinguishing medium source 45 and part of the components of the cooling and fire extinguishing device 41, so that the electronic components in the cooling and fire extinguishing medium source 45 and part of the components of the cooling and fire extinguishing device 41 can operate normally, thereby facilitating the normal operation of the energy storage system.

[0236] Because the cooling and fire extinguishing device 41 needs to output the cooling and fire extinguishing medium to the outside of each sealing assembly, another component (such as the spray pipe 411) of the cooling and fire extinguishing device 41 can be arranged within the second preset distance range of the sealing assembly in the high-voltage direct-hanging energy storage valve, so that the cooling and fire extinguishing medium can be output to the outside of the sealing assembly. The first preset distance range can be greater than the second preset distance range.

[0237] The fire extinguishing system of the related art generally sprays heptafluoropropane or perfluorohexone extinguishing agent to cool down after the battery thermal runaway in the container, and discharges the combustible gas generated by the cell thermal runaway. However, the combustible gas is directly mixed with air after being discharged from the closed space such as the container, and there is a risk of deflagration. In addition, the container is generally arranged in a single layer with a large spacing, and the thermal insulation design between different layers is not considered when arranged in multiple layers. Therefore, the fire extinguishing system in the related art cannot be applied to the energy storage equipment with a multi-layer structure.

[0238] In some embodiments, FIG. 21 is a structural schematic diagram of an energy storage system provided by some other embodiments of the present application. On the basis of the above-mentioned embodiments, in the energy storage system of the embodiments of the present application, the energy storage system is taken as a high-voltage direct-hanging energy storage valve system, and the fire-retardant medium is taken as a gas fire-retardant medium as an exemplary introduction and description of the overall structure of the fire-retardant fire extinguishing device and the cooling fire extinguishing device. The cooling fire extinguishing device includes a first cooling fire extinguishing device and a second cooling fire extinguishing device. The first cooling fire extinguishing device can be used to output the cooling fire extinguishing medium to the inside of the sealed assembly, and the second cooling fire extinguishing device can be used to output the cooling fire extinguishing medium to the outside of the sealed assembly.

[0239] As shown in FIG. 21, the energy storage system of the embodiments of the present application can include a high-voltage direct-hanging energy storage valve, a fire-retardant fire extinguishing device, a first cooling fire extinguishing device, and a second cooling fire extinguishing device. The fire-retardant fire extinguishing device belongs to the first-level fire extinguishing system (or referred to as the inert gas protection system), the first cooling fire extinguishing device belongs to the second-level fire extinguishing system (or referred to as the battery fire extinguishing system), and the second cooling fire extinguishing device belongs to the third-level fire extinguishing system (or referred to as the spray fire extinguishing system).

[0240] In the embodiments of the present application, the design of the multi-level energy storage system of the energy storage valve follows the design concept of “nuclear power level”, and the protection target is to control the thermal diffusion influence range of the cells in the energy storage valve in a single sealed electric cabinet. Therefore, the fire extinguishing system of the energy storage valve can be divided into the above-mentioned three-level fire extinguishing systems.

[0241] The first-level fire extinguishing system is mainly positioned to prevent the fire and direct the discharge of the thermal runaway smoke gas after the cell thermal runaway.

[0242] The second-level fire extinguishing system is mainly positioned to effectively cool and block the thermal diffusion of the thermal runaway cell to the inside of the thermal runaway electric box, the thermal diffusion of the thermal runaway electric box to the adjacent electric box in the same electric cabinet (or referred to as the thermal runaway electric cabinet), and the thermal diffusion of the thermal runaway electric cabinet to the adjacent electric cabinet when the thermal runaway smoke gas of the thermal runaway cell diffuses in the thermal runaway electric box, so as to control the cell thermal runaway in a single sealed electric cabinet.

[0243] The third level fire extinguishing system is mainly positioned to effectively cool the energy storage valve tower support when the thermal runaway electric cabinet in the thermal runaway electric cabinet spreads, so as to block the heat spread between different electric cabinets in the thermal runaway electric cabinet and the heat spread between different sub-modules.

[0244] In summary, the multi-level fire extinguishing system of the high-voltage direct-hanging energy storage valve of the embodiments of the present application can solve the problems of suppressing combustion and directional discharge of thermal runaway smoke after thermal runaway of the battery cell in the energy storage valve with a multi-layer structure, heat spread of the thermal runaway battery cell in the thermal runaway electric cabinet, heat spread of the thermal runaway electric cabinet to the adjacent electric cabinet in the same electric cabinet, heat spread of the thermal runaway electric cabinet to the adjacent electric cabinet, and reduction of the heat resistance of the energy storage valve tower structure support, thereby facilitating the normal operation of the energy storage valve body.

[0245] In some embodiments, FIG. 22 is a structural schematic diagram of an energy storage system according to some other embodiments of the present application. Based on the above embodiments, the energy storage system in the embodiments of the present application is a high-voltage direct-hanging energy storage valve system, and the fire-retardant medium is a liquid fire-retardant medium. The related content of the energy storage system is exemplarily introduced and described. As shown in FIG. 22, assuming that thermal runaway occurs in the electric cabinet in the energy storage sub-module 2, the immersion cooling technology can be used in the embodiments of the present application to immerse all the electric cabinets in all the energy storage sub-modules in the entire energy storage valve tower in the liquid fire-retardant medium. Not only can the battery cell in the thermal runaway electric cabinet be prevented from catching fire after thermal runaway, but also the thermal runaway electric cabinet can be effectively cooled to block the heat spread of the thermal runaway battery cell to the inside of the thermal runaway electric cabinet, the heat spread of the thermal runaway electric cabinet to the adjacent electric cabinet in the same electric cabinet, and the heat spread of the thermal runaway electric cabinet to the adjacent electric cabinet.

[0246] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An energy storage system, wherein: The energy storage system includes at least one sealing component with a built-in flame retardant medium, and a cooling and fire extinguishing device acting on the sealing component; the sealing component accommodates an energy storage unit, and the energy storage unit is immersed in the flame retardant medium.

2. The energy storage system according to claim 1, wherein: The energy storage system further includes a flame retardant fire fighting device, the flame retardant fire fighting device includes a first medium input pipe, and the sealing assembly includes a first input port connected to the first medium input pipe.

3. The energy storage system according to claim 2, wherein: The flame retardant fire fighting device further includes a medium output pipe, and the sealing assembly further includes a first output port connected to the medium output pipe.

4. The energy storage system according to claim 2 or 3, wherein: The flame retardant fire fighting device further comprises a heat exchange component, and the heat exchange component is connected to the first input port and / or the first output port of the sealing component.

5. The energy storage system according to any one of claims 1 to 4, wherein: The cooling and fire extinguishing device includes a second medium input pipe, and the sealing component includes a second input port connected to the second medium input pipe.

6. The energy storage system according to any one of claims 1 to 4, wherein: The cooling and fire extinguishing device includes a second medium input pipe, which is connected to the first input port of the sealing component.

7. The energy storage system according to any one of claims 1 to 6, wherein: The cooling and fire extinguishing device further comprises a nozzle arranged outside the sealing component, and the cooling and fire extinguishing medium is sprayed outside the sealing component via the nozzle.

8. The energy storage system according to claim 7, wherein: The cooling and fire extinguishing device also includes a power component connected to the nozzle.

9. The energy storage system according to any one of claims 2 to 8, wherein: The energy storage system further includes a fire controller, which is connected to the flame retardant fire fighting device and / or the cooling fire extinguishing device.

10. The energy storage system according to any one of claims 1 to 9, wherein: The energy storage system further includes a medium discharge assembly, which is connected to the first output port of the sealing assembly; or the sealing assembly includes a second output port, and the medium discharge assembly is connected to the second output port.

11. The energy storage system according to any one of claims 1 to 10, wherein: The energy storage system further includes a cooling and fire extinguishing medium source connected to the cooling and fire extinguishing device.

12. The energy storage system according to any one of claims 2 to 11, wherein: The energy storage system further includes a flame retardant medium source connected to the flame retardant fire fighting device.

13. The energy storage system according to claim 11, wherein: The cooling and fire extinguishing medium source is arranged outside a first preset distance range of the sealing component.

14. The energy storage system according to claim 12, wherein: The flame retardant medium source is disposed outside a first preset distance range of the sealing assembly.

15. The energy storage system according to any one of claims 1 to 14, wherein: The sealing assembly includes at least one of an energy storage cabinet, an energy storage submodule, a battery room, an energy storage container, an energy storage box, and an energy storage valve tower.

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