Energy storage system, fire-fighting control method therefor, apparatus, and computer device

Abstract

An energy storage system, a fire-fighting control method therefor, an apparatus, and a computer device. The fire-fighting control method for the energy storage system controls a fire-retardant fire-fighting apparatus to maintain operation, thereby providing a fire-retardant medium for a sealing component of the energy storage system, so that the sealing component is in a combustion suppression state, thereby reducing the possibility of the energy storage system experiencing thermal runaway. When flame retardance by the fire-retardant fire-fighting apparatus fails, that is, when thermal runaway occurs in the energy storage system, the fire-fighting control method for the energy storage system controls a cooling and fire extinguishing apparatus (600) to operate, to provide a cooling medium and / or a fire extinguishing medium to a thermal runaway site by means of the cooling and fire extinguishing apparatus (600), thereby cooling and extinguishing the thermal runaway site.

Description

Energy storage system and fire control method, device and computer equipment thereof CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on the Chinese Patent Application No. 202410419363.2 entitled "Energy storage system and fire control method, device and computer equipment thereof" filed on April 8, 2024, which is incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of energy storage, in particular to an energy storage system and a fire control method, device, computer equipment, storage medium and computer program product thereof. BACKGROUND

[0003] With the rapid development of science and technology, high-voltage direct-hanging energy storage technology has gradually been applied due to its high degree of modularity, good economic benefits and high operation reliability. A high-voltage direct-hanging energy storage system generally includes a plurality of connected energy storage sub-modules, which are supported by insulating sub-modules. Each energy storage sub-module includes a plurality of connected battery cabinets, and each battery cabinet includes a plurality of connected electric boxes, and each electric box has a plurality of electric cores inside. In the case of short circuit, overcharge and overdischarge, and thermal abuse of the electric cores inside the electric box, thermal runaway is likely to occur, causing safety accidents, and the fire safety of the energy storage system cannot be met.

[0004] Therefore, it is necessary to provide an energy storage system and a fire control method, device, computer equipment, storage medium and computer program product thereof to improve the fire safety of the energy storage system.

[0005] The present application provides a fire control method of an energy storage system, comprising: controlling a fire-retardant fire control device to operate to provide a fire-retardant medium to a sealing assembly; the sealing assembly contains an energy storage unit; in the case of thermal runaway, controlling a cooling and fire extinguishing device to operate to provide a cooling medium and / or a fire extinguishing medium to a thermal runaway site.

[0006] The above-mentioned fire control method of the energy storage system can control the fire-retardant fire control device to maintain operation under normal circumstances, thereby providing the fire-retardant medium to the sealing assembly of the energy storage system, so that the sealing assembly is in a combustion inhibition state, thereby reducing the possibility of thermal runaway of the energy storage system. In the case of fire-retardant failure of the fire-retardant fire control device, i.e. thermal runaway of the energy storage system, the cooling and fire extinguishing device is controlled to operate, and the cooling and fire extinguishing device provides the cooling medium and / or the fire extinguishing medium to the thermal runaway site, thereby cooling and extinguishing the thermal runaway site. Through this scheme, the energy storage system can be protected by the fire-retardant medium in the case of no thermal runaway, thereby reducing the possibility of thermal runaway, and in the case of thermal runaway, the thermal runaway site is cooled and extinguished by the cooling medium and / or the fire extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0007] In some embodiments, the control of the operation of the cooling and fire extinguishing device to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site comprises: in the case that the thermal runaway site is located and the fire extinguishing device stops operating, the control of the operation of the cooling and fire extinguishing device to provide the cooling medium to the thermal runaway site.

[0008] The above scheme opens the operation of the cooling and fire extinguishing device to transport the cooling medium to the thermal runaway site to reduce the temperature of the battery cell at the thermal runaway site in the case that the thermal runaway site is located and the fire extinguishing device stops operating, thereby inhibiting the thermal runaway phenomenon of the thermal runaway battery cell and relieving the spread of the thermal runaway phenomenon to adjacent battery cells.

[0009] In some embodiments, in the case that the thermal runaway site is located and the fire extinguishing device stops operating, the method further comprises: controlling the cooling and fire extinguishing device to discharge the mixed substance generated at the thermal runaway site to the outside of the energy storage system.

[0010] The above scheme can discharge the mixed substance generated when the cooling and fire extinguishing device opens the cooling of the thermal runaway site to the outside of the energy storage system, thereby reducing the risk of deflagration of the energy storage system.

[0011] In some embodiments, in the case that the thermal runaway site is located and the fire extinguishing device stops operating, the control of the operation of the cooling and fire extinguishing device to provide the cooling medium to the thermal runaway site comprises: in the case that the thermal runaway site is located and the fire extinguishing device stops operating, if a cooling start condition is met, the control of the operation of the cooling and fire extinguishing device to provide the cooling medium to the thermal runaway site.

[0012] The above scheme further requires the cooling start condition to be met before the operation of the cooling and fire extinguishing device is controlled to be opened in the case that the thermal runaway site is located and the fire extinguishing device stops operating, thereby effectively improving the opening reliability of the cooling and fire extinguishing device.

[0013] In some embodiments, the cooling start condition comprises at least one of the following items:

[0014] The first item: the gas detection alarm duration of the thermal runaway site is greater than or equal to a preset time length; the second item: the cell voltage of at least a first preset number of battery cells in the thermal runaway site is less than or equal to a first preset voltage threshold, and the cell temperature of at least the first preset number of battery cells is greater than or equal to a first preset temperature threshold; the third item: the cell temperature of at least a second preset number of battery cells in a site adjacent to the thermal runaway site is greater than or equal to a second preset temperature threshold.

[0015] In the above scheme, in the case that the thermal runaway site is located and the fire extinguishing device stops running, the gas detection alarm duration is greater than or equal to a preset time length, the cell voltage of at least a first preset number of cells in the thermal runaway site is less than or equal to a first preset voltage threshold, and the cell temperature of at least the first preset number of cells is greater than or equal to a first preset temperature threshold, and the cell temperature of at least a second preset number of cells in the site adjacent to the thermal runaway site is greater than or equal to a second preset temperature threshold, at least one of the three, and then controlling the cooling fire extinguishing device to start delivering the cooling medium, which can effectively improve the opening accuracy of the cooling fire extinguishing device.

[0016] In some embodiments, the cooling fire extinguishing device is controlled to run to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site, and further comprising: in the case that the thermal runaway phenomenon of the thermal runaway site is not inhibited, the cooling fire extinguishing device is controlled to run to provide the fire extinguishing medium to the thermal runaway site.

[0017] In the above scheme, the cooling fire extinguishing device of the energy storage system can also deliver the fire extinguishing medium, and in the case that the thermal runaway phenomenon cannot be effectively inhibited by the cooling medium and / or the thermal runaway phenomenon cannot be effectively inhibited by the fire extinguishing device, the cooling fire extinguishing device can be started to deliver the fire extinguishing medium, further improving the operation safety of the energy storage system.

[0018] In some embodiments, in the case of thermal runaway, the method further comprises: controlling the cooling fire extinguishing device to run to provide the cooling medium to the energy storage system.

[0019] In the above scheme, in the case of thermal runaway, the cooling medium can be provided to the energy storage system by controlling the cooling fire extinguishing device, and the energy storage system can be cooled and extinguished by spraying the cooling medium, which can further improve the fire safety of the energy storage system.

[0020] In some embodiments, the fire control method of the energy storage system comprises: in the case that the site temperature of the site adjacent to the thermal runaway site is in a preset normal temperature range, and / or the cell temperature of the thermal runaway site is less than or equal to a preset comparison temperature, it is determined that the thermal runaway phenomenon of the thermal runaway site is inhibited.

[0021] In the above scheme, the thermal runaway can be determined to be inhibited by comparing the site temperature of the site adjacent to the thermal runaway site and / or comparing the cell temperature of the thermal runaway site, which has high determination accuracy.

[0022] In some embodiments, the cooling fire extinguishing device is controlled to run to provide the fire extinguishing medium to the thermal runaway site, comprising: in the case that the thermal runaway site is located and an observation confirmation instruction is received, the cooling fire extinguishing device is controlled to run to provide the fire extinguishing medium to the thermal runaway site.

[0023] The above scheme needs to send the observation confirmation instruction after positioning the thermal runaway site and receiving the observation of the personnel, and then open the cooling and fire extinguishing device to deliver the fire extinguishing medium, which effectively reduces the possibility of false triggering of the cooling and fire extinguishing device and improves the operation reliability of the cooling and fire extinguishing device.

[0024] In some embodiments, in the case of positioning the thermal runaway site and receiving the observation confirmation instruction, controlling the cooling and fire extinguishing device to operate to provide the fire extinguishing medium to the thermal runaway site includes: in the case of positioning the thermal runaway site and receiving the observation confirmation instruction, if the fire extinguishing start condition is met, controlling the cooling and fire extinguishing device to operate to provide the fire extinguishing medium to the thermal runaway site.

[0025] The above scheme, in the case of positioning the thermal runaway site and receiving the observation confirmation instruction sent after the observation of the personnel, also needs to meet the fire extinguishing start condition before controlling the cooling and fire extinguishing device to deliver the fire extinguishing medium, which can effectively improve the opening reliability of the cooling and fire extinguishing device.

[0026] In some embodiments, the fire extinguishing start condition includes at least one of the following items:

[0027] The first item is to determine that a fire occurs according to a fire signal collected by a fire detector; the second item is that the cell voltage of at least a third preset number of cells in the thermal runaway site is less than or equal to a second preset voltage threshold, and the cell temperature of at least the third preset number of cells is greater than or equal to a third preset temperature threshold; the third item is that the energy storage system is out of service.

[0028] The above scheme, in the case of positioning the thermal runaway site and receiving the observation confirmation instruction sent after the observation of the personnel, also needs to meet at least one of the following three conditions: determining that a fire occurs according to a fire signal, the cell voltage of at least a third preset number of cells in the thermal runaway site being less than or equal to a second preset voltage threshold and the cell temperature being greater than or equal to a third preset temperature threshold, and the energy storage system being out of service, before controlling the cooling and fire extinguishing device to deliver the fire extinguishing medium to the thermal runaway site, which can effectively improve the opening accuracy of the cooling and fire extinguishing device.

[0029] In some embodiments, in the case of thermal runaway, the fire-retardant fire extinguishing device is also controlled to operate in displacement mode to extrude and discharge the thermal runaway gas of the thermal runaway site to the outside of the energy storage system by the fire-retardant medium.

[0030] The above scheme, in the case of thermal runaway, the fire-retardant fire extinguishing device can also be switched to displacement operation, and the thermal runaway gas is extruded and discharged to the outside of the energy storage system by delivering the fire-retardant medium to the thermal runaway site, thereby providing an oxygen-free and non-combustion gas environment for the thermal runaway site, and reducing the possibility of fire of the cells in the thermal runaway site due to thermal runaway.

[0031] In some embodiments, in the case of thermal runaway, the cooling and fire extinguishing device is controlled to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site, including: in the case of thermal runaway and the preset time period without thermal runaway, the cooling and fire extinguishing device is controlled to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site.

[0032] The above scheme re-starts the operation of the cooling and fire extinguishing device in the case of thermal runaway and the preset time period without thermal runaway, improving the opening accuracy of the cooling and fire extinguishing device.

[0033] In some embodiments, the fire control method of the energy storage system further includes: in the case of receiving a thermal runaway alarm signal and / or a gas detection alarm signal, determining that thermal runaway has occurred.

[0034] The above scheme can determine whether thermal runaway has occurred through a thermal runaway alarm signal, and can also determine whether thermal runaway has occurred through a gas detection alarm signal, having high thermal runaway determination accuracy.

[0035] In some embodiments, the fire control method of the energy storage system further includes: in the case of receiving a thermal runaway alarm signal and / or a gas detection alarm signal, determining that thermal runaway has occurred.

[0036] The first item is to control the fire-retardant fire extinguishing device to operate to provide fire-retardant medium to the battery cabinet of the energy storage system; the second item is to control the fire-retardant fire extinguishing device to operate to provide fire-retardant medium to the electrical box of the energy storage system; and the third item is to control the fire-retardant fire extinguishing device to operate to provide fire-retardant medium to the container of the energy storage system.

[0037] The above scheme, the sealing assembly can be one or more of the battery cabinet, the electrical box and the container according to the type of the energy storage system, and then the fire-retardant fire extinguishing device can provide a fire-retardant environment for the battery cabinet, the electrical box or the container, reducing the possibility of fire due to thermal runaway of the battery cabinet, the electrical box or the container.

[0038] In some embodiments, the fire control method of the energy storage system further includes: in the case of receiving a thermal runaway alarm signal and / or a gas detection alarm signal, determining that thermal runaway has occurred.

[0039] In the above scheme, when the fire-retardant fire-fighting device provides the fire-retardant medium for the sealed assembly, the fire-retardant fire-fighting device can drive the circulation of the gaseous fire-retardant medium and / or the liquid fire-retardant medium into the sealed assembly, or can input the gaseous fire-retardant medium and / or the liquid fire-retardant medium into the sealed assembly to immerse the entire cabin space, or can operate in a vacuum state to form a vacuum environment in the sealed assembly. In this way, a stable and reliable combustion inhibition environment can be provided for the sealed assembly, and the possibility of combustion after thermal runaway is greatly reduced.

[0040] The application also provides a fire-fighting control device, which comprises: a fire-retardant control module configured to control the operation of the fire-retardant fire-fighting device to provide the fire-retardant medium for the sealed assembly; the sealed assembly contains an energy storage unit; a thermal runaway analysis module configured to detect the thermal runaway state of the energy storage system; and a post-stage fire-fighting control module configured to control the operation of the cooling and fire extinguishing device to provide the cooling medium and / or the fire extinguishing medium for the thermal runaway site in the case of thermal runaway.

[0041] The application also provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0042] The application also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program is executed by a processor to implement the steps of the above method.

[0043] The application also provides a computer program product comprising a computer program, wherein the computer program is executed by a processor to implement the steps of the above method.

[0044] The application also provides an energy storage system comprising a fire-retardant fire-fighting device, a cooling and fire extinguishing device, and an energy storage control device, wherein the fire-retardant fire-fighting device and the cooling and fire extinguishing device are connected to the energy storage control device, and the energy storage control device is configured to execute the steps of the above method. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings. In the drawings:

[0046] FIG. 1 is a flowchart of a fire-fighting control method according to some embodiments of the application;

[0047] FIG. 2 is a schematic structural diagram of a gas protection device according to some embodiments of the application;

[0048] FIG. 3 is a schematic structural diagram of a cooling and fire extinguishing device according to some embodiments of the application;

[0049] Fig. 4 is a schematic diagram of the structure of the cooling and fire extinguishing device in some embodiments of the present application;

[0050] Fig. 5 is a schematic diagram of the structure of the energy storage valve tower in some embodiments of the present application;

[0051] Fig. 6 is a schematic diagram of the structure of the battery cabinet in some embodiments of the present application;

[0052] Fig. 7 is a schematic diagram of the structure of the fire control device in some embodiments of the present application;

[0053] Fig. 8 is a schematic diagram of the structure of the fire control device in some embodiments of the present application;

[0054] Fig. 9 is a schematic diagram of the internal structure of the computing device in some embodiments of the present application.

[0055] Reference signs: 100 - battery cabinet, 200 - gas protection device, 201 - fire-retardant medium source, 202 - thermal runaway detection assembly, 203 - circulation assembly, 204 - medium discharge assembly, 205 - fire control device, 206 - filter assembly; 600 - cooling and fire extinguishing device, 601 - fire extinguishing agent generating device, 603 - mode switching valve, 604 - fire extinguishing agent storage tank; 801 - power assembly, 803 - electric valve, 805 - spray head. DETAILED DESCRIPTION

[0056] 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.

[0057] 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 and are not intended to limit the present application; the terms "include" and "have" 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.

[0058] 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, unless otherwise specifically limited.

[0059] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to one of ordinary skill in the art, embodiments described herein can be combined with one another.

[0060] In the description of the embodiments of the application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0061] In the description of the embodiments of the application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0062] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0063] At present, from the development of market situation, the application of battery is more and more extensive, not only is applied to the energy storage system of water power, fire power, wind power and solar power station, but also is widely applied to electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0064] The container type energy storage system is generally configured with a heptafluoropropane or perfluorocyclohexanone type fire extinguishing system. When the battery cell thermal runaway occurs, the fire extinguishing agent is sprayed to cool down and discharge the flammable gas generated by the battery cell thermal runaway. However, after the flammable gas is discharged from the closed space such as the container, it is directly mixed with air, which has the risk of deflagration. At the same time, with the continuous development and progress of science and technology, high-voltage direct-hanging energy storage type energy storage systems are gradually applied, and the fire extinguishing method of the container type energy storage system is not suitable for the high-voltage direct-hanging type energy storage system.

[0065] For the high-voltage direct-hanging type energy storage system, if the cell short-circuit, overcharge, overdischarge and thermal abuse occur during operation, thermal runaway is easy to occur, thereby producing combustible gases such as hydrogen (H2) and carbon monoxide (CO). When the concentration of the combustible gas reaches a certain amount, a fire or even an explosion accident will occur when encountering a fire source. Therefore, the environment of the cell can be considered to be inhibited from burning, or a cooling medium and / or fire extinguishing medium can be transported to the thermal runaway position in time when the cell thermal runaway occurs, to alleviate the phenomenon of fire caused by thermal runaway.

[0066] Based on the above considerations, the technical scheme of the embodiment of the present application provides a fire-retardant fire-fighting device in the energy storage system. The fire-retardant fire-fighting device can provide fire-retardant medium for the sealed assembly, so that the cell in the sealed assembly is in a combustion-inhibited environment, thereby reducing the possibility of combustion or explosion due to cell thermal runaway. At the same time, a cooling and fire extinguishing device can also be provided in the energy storage system. When the fire-retardant fire-fighting device fails to inhibit, that is, when the energy storage system thermal runaway occurs, the cooling and fire extinguishing device is controlled to start operating, and a cooling medium and / or fire extinguishing medium is transported to the thermal runaway position, that is, the thermal runaway site, to cool and extinguish the thermal runaway site.

[0067] In the above manner, the energy storage system can be protected by the fire-retardant medium when thermal runaway does not occur, thereby reducing the possibility of thermal runaway. When thermal runaway occurs, the thermal runaway site can be cooled and extinguished by the cooling medium and / or fire extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0068] The fire control method of the energy storage system provided by the embodiment of the present application can be applied in a high-voltage direct-hanging type energy storage system or a container type energy storage system, without limitation. The high-voltage direct-hanging type energy storage system can be a valve tower structure high-voltage direct-hanging energy storage system. It can be understood that in another embodiment, the fire control method can also be applied to other structure types of high-voltage direct-hanging energy storage systems, as long as the energy storage system is in a multi-layer structure form, without limitation. Among them, the energy storage system in a multi-layer structure form, that is, a plurality of cells are connected in series and / or parallel and arranged in the same electric box; a plurality of electric boxes can be connected in series and / or parallel to build in the same battery cabinet; a plurality of battery cabinets are further connected in series and / or parallel to build an energy storage sub-module; and the energy storage sub-modules are supported by insulating sub-modules to form an energy storage system.

[0069] In order to facilitate understanding of the technical scheme of the present application, the fire control method can be understood in the following embodiment as being applied to a valve tower structure high-voltage direct-hanging energy storage system.

[0070] Referring to FIG. 1, the present application provides a fire control method of an energy storage system, comprising steps 102 and 104.

[0071] Step 102, control the fire extinguishing device to run to provide fire retardant medium to the sealed assembly.

[0072] The sealed assembly contains the energy storage unit. The fire extinguishing device is a device that can provide fire retardant medium to the sealed assembly of the energy storage system during the operation of the energy storage system, so that the sealed assembly forms a combustion inhibition environment. The sealed assembly is a sealed space for storing the energy storage unit of the energy storage system. In some embodiments, the sealed assembly 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 battery cabinet (or simply referred to as a battery cabinet), an energy storage sub-module, a battery room in an energy storage battery cabinet, an energy storage container, a battery room in a container, and an energy storage valve tower. The energy storage unit is a power supply for storing electrical energy, which can include at least one of a battery, an energy storage cabinet, a battery room, and an energy storage sub-module. The specific type of fire retardant medium is not unique. According to actual needs, it can be a gas fire retardant medium, a liquid fire retardant medium, or a vacuum environment, and is also not limited.

[0073] In actual situations, the specific structure of the fire extinguishing device will be different according to the type of fire retardant medium. In order to facilitate the understanding of the technical solution of the present application, the fire retardant medium is taken as a gas fire retardant medium, and the fire extinguishing device is taken as a gas protection device as an example for explanation and description.

[0074] Thermal runaway refers to the phenomenon that both current and temperature of the battery cell increase and promote each other during charging and discharging. The gas fire retardant medium is a gas that can inhibit or even block combustion. It should be pointed out that the specific type of gas fire retardant medium is not unique. As long as it is a gas with combustion inhibition function, such as nitrogen, carbon dioxide or inert gas, the specific type is not limited.

[0075] In the case where thermal runaway does not occur, the gas protection device of the energy storage system is controlled to drive the gas fire retardant medium to inject into the sealed assembly. Specifically, it can be to immerse the inside of the sealed assembly, or to circulate and flow between the sealed assembly and the gas protection device. In another embodiment, the fire retardant medium can be a liquid fire retardant medium. In the case where thermal runaway does not occur, the same can be achieved by driving the liquid fire retardant medium to circulate and flow or immerse the inside of the sealed assembly by the fire extinguishing device, so that the sealed assembly is in a combustion inhibition state.

[0076] The specific structure of the gas protection device is not unique. For example, taking the circulation of the fire-retardant medium as an example, as long as it can have two different operation modes, one is the circulation mode, in which the gas fire-retardant medium can circulate in the sealed assembly of the energy storage system and the gas protection device, and the other is the replacement mode, in which the gas fire-retardant medium is transmitted to the sealed assembly, and the gas originally stored in the sealed assembly is squeezed and discharged to the outside of the energy storage system. For example, taking the valve tower structure as an example, the gas originally stored can be squeezed and discharged to the outside of the energy storage valve hall at this time.

[0077] For example, in some embodiments, taking the sealed assembly as a battery cabinet as an example, the gas protection device includes an air inlet, a circulation air outlet, and a replacement air outlet. The air inlet of the gas protection device is connected to the air outlet of the battery cabinet, and the circulation air outlet of the gas protection device is connected to the air inlet of the battery cabinet. The circulation air outlet of the gas protection device is provided with a plurality of gas path branches, each of which is connected to a battery cabinet. The air outlets of the battery cabinets are connected to a main gas path, and the main gas path is connected to the air inlet of the gas protection device. In this way, the gas generated by the gas protection device can circulate between the gas protection device and the battery cabinet. The replacement air outlet of the gas protection device is in communication with the external environment, and in the replacement mode, the gas in the battery cabinet can be replaced and discharged to the external environment, reducing the risk of deflagration.

[0078] Further, in some embodiments, referring to FIG. 2, the gas protection device 200 further includes a fire-retardant medium source 201, a thermal runaway detection assembly 202, a circulation assembly 203 (which can be a circulating fan), a medium discharge assembly 204 (which can be an electric three-way valve), and a fire control controller 205. The thermal runaway detection assembly 202 and the medium discharge assembly 204 are respectively connected to the fire control controller 205. The inlet of the medium discharge assembly 204 is connected to the circulation assembly 203 through a gas path, the circulation assembly 203 is connected to the air outlet of the battery cabinet 100 through a gas path, and the thermal runaway detection assembly 202 is arranged in the gas path between the circulation assembly 203 and the air outlet of the battery cabinet 100. The first outlet of the medium discharge assembly 204 is connected to the fire-retardant medium source 201 through a gas path, the fire-retardant medium source 201 is connected to the air inlets of the battery cabinets 100 through a gas path, and the second outlet of the medium discharge assembly 204 is connected to the external environment through a gas path.

[0079] Thus, in the circulation mode, the fire control device 205 controls the inlet of the medium discharge assembly 204 to be communicated with the first outlet, so that the gas fire-retardant medium generated by the fire-retardant medium source 201 is transmitted to the battery cabinet 100 and circulated between the battery cabinet 100 and the gas protection device 200; in the replacement mode, the fire control device 205 controls the inlet of the medium discharge assembly 204 to be communicated with the second outlet, so that the gas fire-retardant medium generated by the fire-retardant medium source 201 is transmitted to the battery cabinet 100 to replace and discharge the gas originally stored in the battery cabinet 100.

[0080] It should be noted that, in some embodiments, the control function of the fire control device 205 can be integrated in the energy storage control device, that is, the energy storage control device is used as the fire control device 205. In other embodiments, the fire control device 205 can also be a device independent of the energy storage control device and is in communication connection with the energy storage control device.

[0081] Further, as shown in FIG. 2, to improve the operation reliability of the gas protection device 200, a filter assembly 206 can also be arranged on the gas path between the circulation assembly 203 and the medium discharge assembly 204 to filter impurities that can exist in the pipeline.

[0082] The specific structure of the fire-retardant medium source 201 is not unique. In some embodiments, as shown in FIG. 2, taking the gas fire-retardant medium as nitrogen gas (in other embodiments, it can also be inert gas) as an example, the fire-retardant medium source 201 includes a nitrogen generator, a gas storage tank, a pressure reducing valve and a nitrogen pressure stabilizing tank connected in sequence, wherein the nitrogen pressure stabilizing tank is arranged on the gas path between the first outlet of the medium discharge assembly 204 and the battery cabinet 100. Thus, the nitrogen gas generated by the nitrogen generator can be transmitted to the gas storage tank for storage, and when there is a use demand, the nitrogen gas is discharged from the gas storage tank, passes through the pressure reducing valve into the nitrogen pressure stabilizing tank, and then is transmitted to the battery cabinet 100 through the gas path.

[0083] The thermal runaway gas is a gas formed by mixing the combustion gas generated due to thermal runaway with air and gas fire-retardant medium. The thermal runaway battery cabinet is a battery cabinet in which thermal runaway occurs. In actual scenarios, one or more battery boxes in the battery cabinet can have thermal runaway, and one or more battery cells in the battery box having thermal runaway can have thermal runaway.

[0084] As shown in the above embodiments, the gas protection device has a circulation mode and a replacement mode. In the circulation mode, the energy storage control device of the energy storage system sends relevant instructions to the fire control device of the gas protection device, the fire control device controls the medium discharge assembly to act, so that the inlet of the medium discharge assembly is in communication with the first outlet, thereby realizing the circulation flow control of the gas fire-retardant medium in the battery cabinet. In the case of thermal runaway, under the action of the relevant instructions sent by the energy storage control device, the fire control device controls the medium discharge assembly to switch, so that the inlet of the medium discharge assembly is in communication with the second outlet, and the gas protection device switches to the replacement mode to perform gas replacement and discharge on the battery cabinet.

[0085] It should be pointed out that in other embodiments, the gas protection device can also not be provided with a fire control device, and the medium discharge assembly and the thermal runaway detection assembly are both in communication connection with the energy storage control device. Under the control of the energy storage control device, the gas protection device operates in different modes, which are not limited in particular.

[0086] Step 104, in the case of thermal runaway, the cooling and fire extinguishing device is controlled to operate to provide cooling medium and / or fire extinguishing medium to the thermal runaway site.

[0087] The cooling medium is a medium that can absorb heat to reduce the temperature of the battery cell, the battery box or the battery cabinet, etc. The fire extinguishing medium is a medium that can extinguish the fire source when a fire occurs. Similarly, the specific types of cooling medium and fire extinguishing medium are not unique, and can be gas, liquid or solid, etc., as long as they have the functions of cooling or fire extinguishing. The thermal runaway site is the position where thermal runaway occurs in the energy storage system. When the battery cell has thermal runaway, the thermal runaway battery cell is located in a sealed assembly, such as a battery box, a battery cabinet or a container, etc., which is not limited here.

[0088] In actual scenarios, after the energy storage system has thermal runaway, the cooling and fire extinguishing device can be controlled to operate to provide cooling medium to the thermal runaway site; the cooling and fire extinguishing device can be controlled to operate to provide fire extinguishing medium to the thermal runaway site; the cooling and fire extinguishing device can be controlled to operate to provide both cooling medium and fire extinguishing medium to the thermal runaway site; the cooling and fire extinguishing device can be controlled to operate to first provide cooling medium to the thermal runaway site, and then provide fire extinguishing medium to the thermal runaway site when certain conditions are met; or the cooling and fire extinguishing device can be controlled to operate to first provide fire extinguishing medium to the thermal runaway site, and then provide cooling medium to the thermal runaway site when certain conditions are met.

[0089] In the fire control method of the energy storage system, the fire-retardant fire-fighting device can be controlled to maintain operation in normal cases, so as to provide a fire-retardant medium for the sealed assembly of the energy storage system, so that the sealed assembly is in a combustion inhibition state, thereby reducing the possibility of thermal runaway of the energy storage system. In the case of fire-retardant failure of the fire-retardant fire-fighting device, that is, in the case of thermal runaway of the energy storage system, the cooling and fire extinguishing device is controlled to operate, and the cooling and fire extinguishing device provides a cooling medium and / or a fire extinguishing medium to the thermal runaway site, thereby cooling and extinguishing the thermal runaway site. Through the scheme, the energy storage system can be protected by the fire-retardant medium in the case of no thermal runaway of the energy storage system, thereby reducing the possibility of thermal runaway. In the case of thermal runaway, the thermal runaway site is cooled and extinguished by the cooling medium and / or the fire extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0090] In some embodiments, the cooling and fire extinguishing device is controlled to operate to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site, including: in the case that the thermal runaway site is located and the fire-retardant fire-fighting device stops operating, the cooling and fire extinguishing device is controlled to operate to provide the cooling medium to the thermal runaway site.

[0091] The thermal runaway site is a battery cabinet, an electric box, an energy storage valve tower or a container in which the thermal runaway cell is located when the energy storage system has thermal runaway, and the specific position is not limited.

[0092] In the case of thermal runaway, the energy storage valve control device will send a closing instruction to the fire-retardant fire-fighting device (such as a gas protection device), and under the action of the closing instruction, the fire-retardant fire-fighting device stops operating and feeds back a closing success signal to the energy storage control device. In addition, the energy storage control device can also locate the cell that has thermal runaway at this time in combination with the cell temperature of each cell, and according to the position of the cell, the electric box, the battery cabinet or the container in which the cell is located can be determined in sequence.

[0093] The specific structure of the cooling and fire extinguishing device is not unique. As long as the device can spray the cooling medium and / or the fire extinguishing medium into the thermal runaway battery cabinet to realize the cooling and fire extinguishing operation of the thermal runaway battery cabinet in the starting operation, the device can be used. For example, in some embodiments, the thermal runaway site is taken as a thermal runaway battery cabinet (in other embodiments, it can also be an electric box or a container).

[0094] Please refer to FIG. 3, the cooling and fire extinguishing device 600 comprises a mode switching valve 603, a communication-connected fire extinguishing agent generating device 601 and a fire control device 205, the outlet of the fire extinguishing agent generating device 601 is connected to the inlet of the battery cabinet through a pipeline, the outlet of the battery cabinet is connected to the external environment through a pipeline, and the mode switching valve 603 is arranged on the pipeline at the outlet of the battery cabinet. Thus, when cooling and fire extinguishing is needed, the fire extinguishing agent generating device 601 is opened by the fire control device 205, the cooling medium is transmitted to the battery cabinet through the pipeline, and the cooling and fire extinguishing operation of the battery cabinet is realized, and in the process, the gas generated by the battery cabinet is transmitted to the external environment through the mode switching valve 603. The fire control device 205 of the cooling and fire extinguishing device 600 and the fire control device of the fire-retardant fire extinguishing device can be shared, or can be separately arranged, which is not limited herein.

[0095] Further, in some embodiments, the cooling medium is a fire extinguishing agent, and the cooling and fire extinguishing device 600 further comprises a fire extinguishing agent storage tank 604 for storing liquid fire extinguishing agent, after the cooling and fire extinguishing device 600 is opened and operated, the liquid fire extinguishing agent is transmitted to the fire extinguishing agent generating device 601 for processing to obtain foam fire extinguishing agent, and then the cooling operation is realized.

[0096] The pipeline of the cooling and fire extinguishing device 600 and the pipeline of the fire-retardant fire extinguishing device can be shared, or different transmission paths can be arranged for the cooling and fire extinguishing device 600 and the fire-retardant fire extinguishing device, which is not limited in detail. It can be understood that in the case that the cooling and fire extinguishing device 600 is opened and operated, the transmission path between the fire-retardant fire extinguishing device and the battery cabinet (i.e. the sealed assembly, which can also be an electric box or a container) should be closed, to reduce the mutual influence between the gas fire-retardant medium and the cooling medium, and to improve the operation reliability of the cooling and fire extinguishing device 600.

[0097] In the case that the thermal runaway site is located and the fire-retardant fire extinguishing device stops operating, the energy storage control device controls the cooling and fire extinguishing device to operate, and through the shared pipeline or the independent pipeline of the fire-retardant fire extinguishing device, the cooling medium is simultaneously input to each battery cabinet (or electric box, container) corresponding to the thermal runaway site, so that the thermal runaway battery cabinet is extinguished, and the remaining battery cabinets without thermal runaway are cooled to alleviate the spread of thermal runaway.

[0098] It can be understood that, similar to the above-mentioned gas protection device, in another embodiment, the cooling medium can be independently transmitted to each battery cabinet, in the case that thermal runaway occurs in any one of the battery cabinets, the battery cabinet with thermal runaway is cooled and extinguished, and the battery cabinets without thermal runaway do not need to be cooled and extinguished, so as to reduce the consumption of the cooling medium.

[0099] In the above scheme, in the case of locating the thermal runaway site and stopping operation of the fire extinguishing device, the cooling and fire extinguishing device is started to run, and the cooling medium is delivered to the thermal runaway site to reduce the temperature of the battery cell at the thermal runaway site, so as to inhibit the thermal runaway phenomenon of the thermal runaway battery cell and relieve the phenomenon of spreading of the thermal runaway phenomenon to adjacent battery cells.

[0100] In some embodiments, in the case of locating the thermal runaway site and stopping operation of the fire extinguishing device, the method further comprises: controlling the cooling and fire extinguishing device to discharge the mixture generated at the thermal runaway site to the outside of the energy storage system.

[0101] The mixture, i.e., the cooling medium, is input into the thermal runaway battery cabinet to cool down, reacts in the thermal runaway battery cabinet, and finally mixes the generated substances, which can be gaseous or can include particulate matter generated by combustion, and the specific limitation is not made. As shown in the above embodiment, the cooling and fire extinguishing device comprises a mode switching valve, which is controlled to be opened during the cooling and fire extinguishing process, so that the mixture is discharged to the outside environment through the mode switching valve, which will not be described here.

[0102] The above scheme can discharge the generated mixture out of the energy storage system when the cooling and fire extinguishing device is started to cool down the thermal runaway site, thereby reducing the risk of explosion of the energy storage system.

[0103] In some embodiments, in the case of locating the thermal runaway site and stopping operation of the fire extinguishing device, the cooling and fire extinguishing device is controlled to run to provide the cooling medium to the thermal runaway site, comprising: in the case of locating the thermal runaway site and stopping operation of the fire extinguishing device, if the cooling start condition is met, the cooling and fire extinguishing device is controlled to run to provide the cooling medium to the thermal runaway site.

[0104] The cooling start condition is a condition required to be met by the cooling and fire extinguishing device when starting to deliver the cooling medium. In the scheme of this embodiment, the cooling and fire extinguishing device is started to deliver the cooling medium, in addition to the requirement of locating the thermal runaway site and stopping operation of the fire extinguishing device, the cooling start condition is also required to be met, otherwise the cooling and fire extinguishing device will not be started to run.

[0105] In the above scheme, in the case of locating the thermal runaway site and stopping operation of the fire extinguishing device, the cooling and fire extinguishing device is controlled to be started to run, and the cooling start condition is also required to be met, which can effectively improve the starting reliability of the cooling and fire extinguishing device.

[0106] In some embodiments, the cooling start condition comprises at least one of the following items:

[0107] The first item: the gas detection alarm duration of the thermal runaway site is greater than or equal to a preset time length.

[0108] The second item: in the thermal runaway site, the cell voltage of at least the first preset number of cells is less than or equal to the first preset voltage threshold, and the cell temperature of at least the first preset number of cells is greater than or equal to the first preset temperature threshold.

[0109] The third item: in the site adjacent to the thermal runaway site, the cell temperature of at least the second preset number of cells is greater than or equal to the second preset temperature threshold.

[0110] The cooling start condition is not unique, and can be at least one of the following three conditions: one, the gas detection alarm duration of the thermal runaway site (which can be a battery cabinet, an electric box or a container) is greater than or equal to a preset time length; two, the cell voltage of at least the first preset number of cells in the thermal runaway site is less than or equal to the first preset voltage threshold, and the cell temperature of at least the first preset number of cells is greater than or equal to the first preset temperature threshold; three, in the site adjacent to the thermal runaway site, the cell temperature of at least the second preset number of cells is greater than or equal to the second preset temperature threshold.

[0111] It should be pointed out that the size of the first preset number is not unique, and will be different in combination with the total number of cells in each site under actual scene. For example, in some embodiments, the first preset number can be set to 3-52, that is, 3, 52, or any number between 3 and 52. The minimum value of the first preset number is 3, which can start cooling and fire extinguishing in time when a small number of cells abnormally, and improve the opening speed of the cooling and fire extinguishing device. Setting the maximum value of the first preset number to 52 can start cooling and fire extinguishing when a large number of cells abnormally, so that the opening of the cooling and fire extinguishing device must be carried out in the case of thermal runaway, and the opening accuracy of the cooling and fire extinguishing device is improved. Therefore, in actual scene, the first preset number can be set to 3-52 in combination with different consideration requirements.

[0112] The size of the first preset voltage threshold is not unique, and will be different according to the type of the cell under actual scene. For example, in some embodiments, the first preset voltage threshold can be set to 0V-5V, that is, 5V, or any value between 0V and 5V. Setting the first preset voltage threshold to 0V, at this time, the cell voltage needs to be reduced to 0V before considering that the cell has thermal runaway abnormality, so that the opening of the cooling and fire extinguishing device must be carried out in the case of thermal runaway of the cell, and the opening accuracy of the cooling and fire extinguishing device is improved. Setting the first preset voltage threshold to 5V makes the cell voltage threshold lower than or equal to 5V, which is considered to be a thermal runaway abnormality, and the opening speed of the cooling and fire extinguishing device is improved.

[0113] The second preset number of sizes is not unique, and the number of adjacent sites and the total number of battery cells in each site will be different in actual scenarios. For example, in some embodiments, the second preset number can be set to 3-52, that is, 3, 52, or any number between 3 and 52. Similarly, the minimum value of the second preset number is 3, which can start the cooling and fire extinguishing in time when a small number of battery cells in the adjacent site are abnormal, and improve the opening speed of the cooling and fire extinguishing device. Setting the maximum value of the second preset number to 52 can start the cooling and fire extinguishing when a large number of battery cells in the adjacent site are abnormal, so that the opening of the cooling and fire extinguishing device must be performed in the case of thermal runaway of the current site, and the opening accuracy of the cooling and fire extinguishing device is improved.

[0114] The size of the first preset temperature threshold is not unique, and the type of battery cell will be different in actual scenarios. For example, in some embodiments, the first preset temperature threshold can be set to 100-700°C, that is, 100°C, 700°C, or any value between 100°C and 700°C. Setting the first preset temperature threshold to 700V, the battery cell temperature needs to be greater than or equal to 700°C, which is considered to be a thermal runaway abnormality, so that the opening of the cooling and fire extinguishing device must be performed in the case of thermal runaway of the battery cell, and the opening accuracy of the cooling and fire extinguishing device is improved. Setting the first preset temperature threshold to 100°C can start the cooling and fire extinguishing in time in the case of abnormal temperature rise of the battery cell, and improve the opening speed of the cooling and fire extinguishing device.

[0115] The size of the second preset temperature threshold is not unique, and the type of battery cell will be different in actual scenarios. For example, in some embodiments, the second preset temperature threshold can be set to 50-140°C, that is, 50°C, 140°C, or any value between 50°C and 140°C. Similarly, setting the second preset temperature threshold to 140°C, the temperature of the battery cell in the adjacent site needs to be greater than or equal to 140°C, which is considered to be a thermal runaway abnormality of the battery cell in the current site, so that the opening of the cooling and fire extinguishing device must be performed in the case of thermal runaway of the battery cell, and the opening accuracy of the cooling and fire extinguishing device is improved. Setting the second preset temperature threshold to 50°C can start the cooling and fire extinguishing in time in the case of abnormal temperature rise of the battery cell in the adjacent site, and improve the opening speed of the cooling and fire extinguishing device.

[0116] In the above scheme, in the case that the thermal runaway site is located and the fire extinguishing device stops running, the gas detection alarm duration is greater than or equal to the preset time length, the cell voltage of at least the first preset number of cells in the thermal runaway site is less than or equal to the first preset voltage threshold, and the cell temperature of at least the first preset number of cells is greater than or equal to the first preset temperature threshold, and at least the second preset number of cells adjacent to the thermal runaway site has a cell temperature greater than or equal to the second preset temperature threshold, at least one of the three, and the cooling fire extinguishing device is controlled to start delivering the cooling medium. This can effectively improve the opening accuracy of the cooling fire extinguishing device.

[0117] In some embodiments, the cooling fire extinguishing device is controlled to run to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site, and further comprising: in the case that the thermal runaway phenomenon of the thermal runaway site is not inhibited, the cooling fire extinguishing device is controlled to run to provide the fire extinguishing medium to the thermal runaway site.

[0118] The thermal runaway phenomenon is inhibited, that is, the thermal runaway site is cooled to a normal state by the fire extinguishing device of the previous stage (which can be the fire extinguishing medium of the cooling fire extinguishing device or the fire extinguishing device). If the thermal runaway phenomenon is inhibited, there is no need to start further fire extinguishing at this time, so the energy storage control device only needs to control the fire extinguishing device of the previous stage to stop running and wait for the staff to repair. If the thermal runaway phenomenon is not inhibited, the cooling fire extinguishing device needs to be further controlled to start delivering the fire extinguishing medium to reduce the possibility of fire.

[0119] It should be pointed out that the cooling fire extinguishing device is controlled to start delivering the fire extinguishing medium, which can be executed in the case that the fire extinguishing device of the previous stage cannot effectively inhibit the thermal runaway phenomenon after being controlled to run. Correspondingly, the energy storage system is configured with two-stage fire extinguishing at this time, the first stage is the fire extinguishing device, and the second stage is the fire extinguishing medium of the cooling fire extinguishing device.

[0120] In another embodiment, the cooling fire extinguishing device is controlled to start delivering the fire extinguishing medium, which can also be executed in the case that the cooling fire extinguishing device cannot effectively inhibit the thermal runaway phenomenon after being controlled to start delivering the cooling medium. Correspondingly, the energy storage system is configured with three-stage fire extinguishing at this time, the first stage is the fire extinguishing device, the second stage is the cooling medium of the cooling fire extinguishing device, and the third stage is the fire extinguishing medium of the cooling fire extinguishing device.

[0121] In the above scheme, the cooling fire extinguishing device of the energy storage system can also deliver the fire extinguishing medium, and can start delivering the fire extinguishing medium in the case that the thermal runaway phenomenon cannot be effectively inhibited by the cooling medium and / or the fire extinguishing phenomenon cannot be effectively inhibited by the fire extinguishing device, which further improves the operation safety of the energy storage system.

[0122] In some embodiments, in the case of thermal runaway, the method further comprises: controlling the cooling and fire extinguishing device to operate to provide cooling medium to the energy storage system.

[0123] In the scheme of the present embodiment, the cooling and fire extinguishing device can also spray the cooling medium, thereby achieving overall cooling of the energy storage system. It should be noted that the spraying function of the cooling and fire extinguishing device can be turned on immediately after the thermal runaway is detected, that is, at this time the energy storage system has two levels of fire protection functions, the first level being the fire retardant fire protection device providing fire retardant medium for the sealed assembly, and the second level being the cooling and fire extinguishing device providing cooling medium for the energy storage system.

[0124] In another embodiment, the spraying function of the cooling and fire extinguishing device can also be turned on after the cooling and fire extinguishing device provides cooling medium and / or fire extinguishing medium to the thermal runaway site. Correspondingly, in the scheme of the present embodiment, after the thermal runaway occurs and the cooling and fire extinguishing device provides cooling medium and / or fire extinguishing medium to the thermal runaway site, if it is detected that the thermal runaway phenomenon has not been suppressed, the cooling and fire extinguishing device is further controlled to turn on the spraying function. That is, at this time the energy storage system has three levels of fire protection functions, the first level being the fire retardant fire protection device providing fire retardant medium for the sealed assembly, the second level being the cooling and fire extinguishing device providing cooling medium and / or fire extinguishing medium for the thermal runaway site, and the third level being the cooling and fire extinguishing device providing cooling medium for the energy storage system.

[0125] In the scheme of the present embodiment, the cooling and fire extinguishing device further comprises a spraying device, which is a device for cooling and fire extinguishing of the energy storage system by spraying cooling medium to the energy storage system. In actual scenarios, if the thermal runaway phenomenon is suppressed, there is no need to turn on further fire protection at this time, so at this time the energy storage control device only needs to control the fire protection device of the previous level (i.e., the cooling and / or fire extinguishing medium spraying of the cooling and fire extinguishing device) to stop operating, and wait for the staff to carry out maintenance. In the case where the thermal runaway phenomenon has not been suppressed after the cooling and fire extinguishing device sprays the cooling and / or fire extinguishing medium, the spraying device needs to be further turned on to operate to provide cooling medium to the energy storage system.

[0126] It can be understood that the specific type of cooling medium is not unique, and any gas, liquid or solid that has cooling and fire extinguishing functions can be used. In some embodiments, the cooling medium can be water. After the energy storage valve control device controls the spraying device to turn on and operate, the spraying device can directly spray the cooling medium to the thermal runaway site of the energy storage system, or can spray the cooling medium to the entire energy storage system, and the specific spraying position is not limited.

[0127] It should be pointed out that the specific structure of the spraying device is not unique, and in some embodiments, the energy storage system in the energy storage valve tower structure is taken as an example for illustration. Referring to FIG. 4, the spraying device includes a spray head 805, an electric valve 803, a power assembly 801, and a fire control device 205. The power assembly 801, the electric valve 803, and the spray head 805 are sequentially connected by a water path. The spray head 805 is arranged at the top of the energy storage valve tower. The spray head 805, the electric valve 803, and the power assembly 801 are respectively in communication connection with the fire control device 205. The fire control device 205 is in communication connection with the energy storage control device. In this way, when the spraying device is started, the power assembly 801 can extract cooling medium (such as a fire pool) from the cooling medium source, and the cooling medium is sprayed out through the spray head 805 at a specific angle and pressure to spray and cool the energy storage valve tower. The fire control device 205 of the spraying device can be shared with the fire control device of the fire extinguishing device, or can be separately arranged, which is not limited herein.

[0128] It can be understood that the number of the electric valve 803 and the spray head 805 in the spraying device is not unique. In some embodiments, an electric valve 803 and a spray head 805 can be arranged for each energy storage valve tower to realize independent spraying and cooling of each energy storage valve tower.

[0129] The above scheme can further improve the fire safety of the energy storage system by providing cooling medium to the energy storage system through the cooling and fire extinguishing device, spraying the energy storage system with the cooling medium, and realizing cooling and fire extinguishing of the energy storage system when thermal runaway occurs.

[0130] In some embodiments, the fire control method of the energy storage system includes: determining that the thermal runaway phenomenon of the thermal runaway site is inhibited when the site temperature of the site adjacent to the thermal runaway site is in a preset normal temperature range, and / or the cell temperature of the thermal runaway site is less than or equal to a preset comparison temperature.

[0131] The energy storage control device monitors the cell temperature of each cell in real time during operation, and analyzes whether the thermal runaway phenomenon is inhibited at this time in combination with the obtained cell temperature. The analysis can be performed on the cell temperature of the thermal runaway site (specifically, the thermal runaway battery cabinet), or on the cell temperature in the site adjacent to the thermal runaway site, or on both, which is not limited in detail.

[0132] It should be pointed out that the thermal runaway site is taken as an example to explain the thermal runaway battery cabinet. The site temperature of the adjacent site is in the preset normal temperature range, which can be the temperature of each cell in the adjacent battery box in the preset normal temperature range, or the average temperature of each cell in the adjacent battery box in the preset normal temperature range, and the specific limitation is not limited. The cell temperature of the thermal runaway site is less than or equal to the preset comparison temperature, which can be that the temperature of each cell in the thermal runaway battery box is less than or equal to the preset comparison temperature, or the average value of the temperature of each cell in the thermal runaway battery box is less than or equal to the preset comparison temperature, and the specific selection can be combined with the actual demand.

[0133] It can be understood that the size of the preset comparison temperature is not unique, and the preset comparison temperature will also be different according to the type of the cell. For example, in some embodiments, the preset comparison temperature can be set to 100℃. Among them, 100℃ represents the minimum temperature value that the cell can reach in the thermal runaway state, and the cell temperature below 100℃ can indicate that the thermal runaway of the cell is inhibited. In this way, by setting the preset comparison temperature to 100℃, the case that the thermal runaway of the cell is inhibited can be detected in time.

[0134] The above scheme can determine whether the thermal runaway is inhibited by comparing the site temperature of the adjacent site of the thermal runaway site or the temperature of the cell in the thermal runaway site, which has high determination accuracy.

[0135] In some embodiments, the control of the cooling and fire extinguishing device to run to provide the fire extinguishing medium to the thermal runaway site includes: in the case of positioning to the thermal runaway site and receiving the observation confirmation instruction, controlling the cooling and fire extinguishing device to run to provide the fire extinguishing medium to the thermal runaway site.

[0136] The observation confirmation instruction is a determination signal that the worker feeds back to the energy storage control device to confirm that the energy storage system has thermal runaway after observing that the energy storage system has thermal runaway. In the case that the thermal runaway phenomenon is not inhibited, the energy storage control device can also locate the cell that has thermal runaway at this time according to the cell temperature of each cell, and determine the battery box, the battery cabinet and the energy storage tower where the cell is located at this time in sequence. The energy storage control device controls the cooling and fire extinguishing device of the energy storage system to deliver the fire extinguishing medium after positioning to the thermal runaway site and receiving the observation confirmation instruction.

[0137] The above scheme needs to open the cooling and fire extinguishing device to deliver the fire extinguishing medium after positioning to the thermal runaway site and receiving the observation confirmation instruction sent by the personnel observation, which effectively reduces the possibility of false start of the cooling and fire extinguishing device and improves the operation reliability of the cooling and fire extinguishing device.

[0138] It should be noted that, in some embodiments, in addition to controlling the operation of the cooling and fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site, the control of the operation of the cooling and fire extinguishing device to provide the cooling medium to the energy storage system can also include: in the case that the thermal runaway phenomenon of the thermal runaway site is not suppressed, and in the case that the positioning to the thermal runaway site and the observation confirmation instruction are received, controlling the operation of the cooling and fire extinguishing device to provide the cooling medium to the energy storage system.

[0139] In some embodiments, in the case that the positioning to the thermal runaway site and the observation confirmation instruction are received, the control of the operation of the cooling and fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site includes: in the case that the positioning to the thermal runaway site and the observation confirmation instruction are received, if the fire extinguishing start condition is met, controlling the operation of the cooling and fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site.

[0140] The fire extinguishing start condition is a condition required to be met for the fire extinguishing medium delivery of the cooling and fire extinguishing device. According to the scheme of this embodiment, in addition to the positioning to the thermal runaway site and the observation confirmation instruction sent by the worker, the fire extinguishing start condition also needs to be met, otherwise the cooling and fire extinguishing device will not be started.

[0141] According to the above scheme, in the case that the positioning to the thermal runaway site and the observation confirmation instruction sent by the worker are received, the fire extinguishing start condition also needs to be met before the cooling and fire extinguishing device is controlled to deliver the fire extinguishing medium, which can effectively improve the starting reliability of the cooling and fire extinguishing device.

[0142] In some embodiments, the fire extinguishing start condition includes at least one of the following items:

[0143] The first item: determining that a fire occurs according to a fire signal collected by a fire detector.

[0144] The second item: the cell voltage of at least a third preset number of cells in the thermal runaway site is less than or equal to a second preset voltage threshold, and the cell temperature of at least the third preset number of cells is greater than or equal to a third preset temperature threshold.

[0145] The third item: the energy storage system is in energy storage shutdown.

[0146] The energy storage shutdown means that the energy storage system stops charging and discharging. According to the scheme of this embodiment, the cooling and fire extinguishing device further includes a fire detector, which is arranged in an energy storage valve hall (for example, a valve tower structure) of the energy storage system. The fire detector can detect whether a fire occurs inside the energy storage valve hall where the energy storage valve tower is located. It should be noted that the specific type of the fire detector is not unique, and in some embodiments, it can be at least one of an infrared sensor, a smoke sensor, and a flame detector.

[0147] In the case that the energy storage control device is positioned to the thermal runaway site (which can be the energy storage valve tower where thermal runaway occurs) and receives the observation confirmation instruction, the cooling and fire extinguishing device does not directly control the opening of the fire extinguishing medium, but needs to meet additional conditions before being restarted.

[0148] In some embodiments, the cooling and fire extinguishing device can be restarted in the case that at least one of the following three conditions is met. One: the energy storage control device determines that a fire occurs according to the fire signal collected by the fire detector; two: the voltage of at least a third preset number of battery cells in the thermal runaway site (which can be a thermal runaway electrical box) is less than or equal to a second preset voltage threshold, and the battery cell temperature of at least the third preset number of battery cells is greater than or equal to a third preset temperature threshold; three: the energy storage system is shut down.

[0149] It should be pointed out that the size of the third preset number is not unique, and will be different depending on the total number of battery cells in the site under actual scenarios. For example, in some embodiments, the first preset number can be set the same as the first preset number, i.e., it can be set to 3-52, i.e., 3, 52, or any number between 3 and 52. The minimum value of the third preset number is 3, which can start the delivery of fire extinguishing medium when a small number of battery cells are abnormal, improving the opening speed of the cooling and fire extinguishing device. Setting the maximum value of the third preset number to 52 can start the delivery of fire extinguishing medium when a large number of battery cells are abnormal, ensuring that the opening of the cooling and fire extinguishing device is performed in the case of thermal runaway, improving the opening accuracy of the cooling and fire extinguishing device.

[0150] The size of the second preset voltage threshold is not unique and will be different depending on the type of battery cell under actual scenarios. For example, in some embodiments, the second preset voltage threshold can be set to 0V-5V, i.e., it can be 5V or any value between 0V and 5V. Setting the second preset voltage threshold to 0V requires the battery cell voltage to drop to 0V before considering that the battery cell has a thermal runaway anomaly, which ensures that the delivery of fire extinguishing medium is performed in the case of thermal runaway of the battery cell, improving the opening accuracy of the cooling and fire extinguishing device. Setting the second preset voltage threshold to 5V allows the battery cell voltage to drop to less than or equal to 5V to be considered as a thermal runaway anomaly, improving the opening speed of the cooling and fire extinguishing device.

[0151] The size of the third preset temperature threshold is not unique, and may be different for different types of battery cells in actual scenarios. For example, in some embodiments, the third preset temperature threshold is set to be the same as the first preset temperature threshold, which can be set to 100-700°C, i.e., 100°C, 700°C, or any value between 100°C and 700°C. When the third preset temperature threshold is set to 700V, the battery cell temperature needs to be greater than or equal to 700°C before the battery cell is considered to have a thermal runaway anomaly, so that the delivery of the fire extinguishing medium is necessarily performed in the case of thermal runaway of the battery cell, thereby improving the opening accuracy of the cooling and fire extinguishing device. When the third preset temperature threshold is set to 100°C, the delivery of the fire extinguishing medium can be started in a timely manner in the case of abnormal temperature rise of the battery cell, thereby improving the opening speed of the cooling and fire extinguishing device.

[0152] In the above scheme, in the case of locating the thermal runaway site and receiving the observation confirmation instruction sent by the personnel observation, at least one of the following conditions needs to be met before the cooling and fire extinguishing device is controlled to deliver the fire extinguishing medium to the thermal runaway site: the fire is determined to occur according to the fire signal, the battery cell voltage of at least a third preset number of battery cells in the thermal runaway site is less than or equal to a second preset voltage threshold, and the battery cell temperature is greater than or equal to a third preset temperature threshold, and the energy storage system is shut down, thereby effectively improving the opening accuracy of the cooling and fire extinguishing device.

[0153] It should be noted that in some embodiments, in the case of locating the thermal runaway site and receiving the observation confirmation instruction, the cooling and fire extinguishing device is controlled to run to provide cooling medium to the energy storage system, which can further include: in the case of locating the thermal runaway site and receiving the observation confirmation instruction, if the fire extinguishing start condition is met, the cooling and fire extinguishing device is controlled to run to provide cooling medium to the energy storage system.

[0154] In this embodiment, the cooling and fire extinguishing device can deliver cooling medium or fire extinguishing medium. After the cooling and fire extinguishing device delivers the cooling medium or fire extinguishing medium for cooling and fire extinguishing, if the thermal runaway phenomenon of the thermal runaway site is not suppressed, the cooling medium is sprayed to the energy storage system through the method of this embodiment. The fire extinguishing start condition is as shown in the above embodiment, which is not repeated here.

[0155] In some embodiments, the method further includes: in the case that the fire is suppressed, the cooling and fire extinguishing device is controlled to stop running.

[0156] The fire is suppressed, that is, the fire of the energy storage system is eliminated, and there is no possibility of further expansion. The specific detection method is not unique, and in some embodiments, it can be analyzed and judged through the fire signal detected by the fire detector. Therefore, in the case where the energy storage control device detects that the fire is suppressed, any one of the cooling medium and / or fire extinguishing medium conveying function of the cooling and fire extinguishing device or the cooling medium spraying function of the cooling and fire extinguishing device can be closed and operated, or both the cooling medium and / or fire extinguishing medium conveying function of the cooling and fire extinguishing device and the cooling medium spraying function of the cooling and fire extinguishing device are closed and operated, which can be determined in combination with the actual scene, and is not limited here.

[0157] The above scheme, in the case where the fire is suppressed through the opening of the spraying function, the cooling and fire extinguishing device can be closed and operated, and the staff can be waited for maintenance, which can effectively reduce the waste of fire fighting resources.

[0158] In some embodiments, in the case of thermal runaway, the method further comprises: controlling the fire-retardant fire extinguishing device to replace and operate to extrude and discharge the thermal runaway gas at the thermal runaway site to the outside of the energy storage system through the fire-retardant medium.

[0159] The fire-retardant fire extinguishing device has a replacement mode operation function, in which mode the fire-retardant medium is transmitted to the sealed assembly to extrude and discharge the gas originally stored in the sealed assembly to the outside of the energy storage system. Taking a valve tower structure as an example, at this time, it can be extruded and discharged to the outside of the energy storage valve hall.

[0160] In the case where thermal runaway does not occur, the fire-retardant fire extinguishing device operates to provide the fire-retardant medium to the sealed assembly, which can be in the form of circulation or immersion of the fire-retardant medium, or in the form of vacuum extraction, so that the sealed assembly is in a combustion suppression state. If thermal runaway occurs, the fire-retardant fire extinguishing device will first be switched to replacement mode operation to transport the fire-retardant medium to the thermal runaway site to extrude and discharge the thermal runaway gas to the outside of the energy storage system, thereby maintaining the sealed assembly in a combustion suppression state.

[0161] The above scheme, in the case of thermal runaway, the fire-retardant fire extinguishing device can also be switched to replacement operation to transport the fire-retardant medium to the thermal runaway site to extrude and discharge the thermal runaway gas to the outside of the energy storage system, thereby providing an oxygen-free and non-combustion gas environment for the thermal runaway site, and reducing the possibility of fire of the battery cell at the thermal runaway site due to thermal runaway.

[0162] In some embodiments, in the case of thermal runaway, the cooling and fire extinguishing device is controlled to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site, comprising: in the case where thermal runaway occurs and the thermal runaway is not eliminated within a preset time period, the cooling and fire extinguishing device is controlled to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site.

[0163] The thermal runaway release is the release of the thermal runaway alarm state of the thermal runaway site, which can be the release of the thermal runaway alarm of the thermal runaway site, or the release of the gas detection alarm of the thermal runaway site. If the thermal runaway of the thermal runaway site is not released within the preset time period, the operation of the subsequent fire extinguishing device (i.e. the cooling and fire extinguishing device) will be started, and the cooling and fire extinguishing device will be used for cooling and fire extinguishing, so as to quickly relieve the thermal runaway phenomenon and reduce the possibility of thermal runaway diffusion.

[0164] The above scheme improves the opening accuracy of the cooling and fire extinguishing device by starting the cooling and fire extinguishing device to operate again in the case of thermal runaway and the thermal runaway not being released within the preset time period.

[0165] In some embodiments, the fire control method of the energy storage system further comprises: in the case of receiving the thermal runaway alarm signal and / or the gas detection alarm signal, determining that thermal runaway occurs.

[0166] The way to check whether the energy storage system has thermal runaway is not unique, which can be combined with the cell temperature of each cell in the electric box of the battery cabinet, or combined with the concentration parameter of the combustible gas in the sealing assembly.

[0167] In some embodiments, the thermal runaway alarm signal is generated according to the cell temperature of each cell in each electric box of the battery cabinet of the energy storage system, and the gas detection alarm signal is generated according to the concentration parameter of the combustible gas in the gas path (communicating with the sealing assembly) of the fire extinguishing device.

[0168] The energy storage system includes a plurality of energy storage sub-modules connected (which can be connected in parallel or other ways according to actual needs, which are not limited here), each energy storage sub-module is supported by an insulating sub 301, and is built to form an energy storage valve tower (other embodiments can also be container type structures, etc., which are not limited), which can be combined with reference to FIG. 5. The same energy storage system includes at least one energy storage valve tower, and each energy storage valve tower is commonly arranged in an energy storage valve hall. Each energy storage sub-module includes a plurality of battery cabinets (each battery cabinet is a sealed structure) connected (which can be connected in parallel or other ways according to actual needs, which are not limited here), which can be combined with reference to FIG. 6. The inside of each battery cabinet includes a plurality of electric boxes, and each electric box includes a plurality of series and / or parallel connected cells.

[0169] Therefore, the occurrence of thermal runaway in the energy storage system will inevitably cause the cell temperature of the cell at the thermal runaway site to rise. Therefore, in the scheme of the present embodiment, the energy storage control device is in communication connection with the battery management system (BMS), and the cell temperature of each cell is acquired in real time during the operation of the energy storage system, and is compared and analyzed with the preset thermal runaway temperature threshold. In the case that the temperature of any one cell is greater than or equal to the thermal runaway threshold, it is considered that the energy storage system has thermal runaway, and at this time a thermal runaway alarm signal will be generated to output a prompt information to remind the user.

[0170] As shown in the above embodiments, a thermal runaway detection assembly is arranged on the gas path between the sealing assembly and the circulating assembly of the fireproofing device, the concentration of flammable gas in the gas transmitted in the gas path can be detected in real time through the thermal runaway detection assembly, and a flammable gas concentration parameter is obtained, and in the case that the flammable gas concentration parameter is greater than or equal to a preset concentration threshold, it is considered that the sealing assembly has thermal runaway at this time, and a gas detection alarm signal will be generated at this time to output prompt information to remind the user.

[0171] It should be pointed out that the comparison operation of the flammable gas concentration parameter can be performed in the energy storage control device or in the fire control controller of the fireproofing device, and the specific type of the thermal runaway detection assembly is not unique, as long as it is a device capable of detecting various flammable gases generated by battery thermal runaway, for example, in some embodiments, at least one of a methane detector, a carbon monoxide detector, and a hydrogen detector.

[0172] In actual scenarios, the energy storage control device can use any one of the cell temperature analysis and the flammable gas concentration parameter analysis, or a combination of the two, to determine whether the energy storage system has thermal runaway, and the specific type is not limited.

[0173] It can be understood that the scheme of the above embodiments can simultaneously transmit combustion inhibition gas to each sealing assembly, and the gas generated by each sealing assembly is returned through the same gas path. Therefore, in the case of thermal runaway, gas replacement can be performed on all sealing assemblies in the same energy storage system, which can alleviate the thermal runaway phenomenon of the sealed cabin and change the internal environment of the remaining sealing assemblies to reduce the possibility of thermal runaway spreading to other sealing assemblies.

[0174] In another embodiment, the gas protection device can also control the gas delivery of each sealing assembly individually, and in the case of thermal runaway, only the thermal runaway sealing assembly is replaced, and the sealing assembly that has not occurred thermal runaway continues to be replaced, which can be set according to actual needs.

[0175] The above scheme can determine whether thermal runaway occurs through the thermal runaway alarm signal, and can also determine whether thermal runaway occurs through the gas detection alarm signal, which has high accuracy in determining thermal runaway.

[0176] In some embodiments, the fireproofing device is controlled to run to provide fireproofing medium to the sealing assembly, including at least one of the following items:

[0177] The first item: controlling the fireproofing device to run to provide fireproofing medium to the battery cabinet of the energy storage system;

[0178] The second item is to control the operation of the fire extinguishing device to provide the fire retardant medium to the electrical box of the energy storage system.

[0179] The third item is to control the operation of the fire extinguishing device to provide the fire retardant medium to the container of the energy storage system.

[0180] According to different actual use scenarios, the sealing assembly can be one or more of the electrical box, the battery cabinet and the container, thereby providing a combustion inhibition environment for different energy storage levels.

[0181] According to the type of the energy storage system, the sealing assembly can be one or more of the battery cabinet, the electrical box and the container, and the fire extinguishing device can provide a combustion inhibition environment for the battery cabinet, the electrical box or the container, thereby reducing the possibility of combustion due to thermal runaway of the battery cabinet, the electrical box or the container.

[0182] In some embodiments, the operation of the fire extinguishing device to provide the fire retardant medium to the sealing assembly includes any one of the following multiple items: the first item is to control the fire extinguishing device to drive the gaseous fire retardant medium and / or the liquid fire retardant medium to circulate and flow in the fire extinguishing device and the sealing assembly; the second item is to control the fire extinguishing device to operate to provide the gaseous fire retardant medium and / or the liquid fire retardant medium to immerse the inside of the sealing assembly; and the third item is to control the fire extinguishing device to operate in a vacuum mode to form a vacuum environment in the inside of the sealing assembly.

[0183] When the fire extinguishing device provides the fire retardant medium to the sealing assembly, the fire extinguishing device can drive the gaseous fire retardant medium and / or the liquid fire retardant medium to circulate and flow into the sealing assembly, or can input the gaseous fire retardant medium and / or the liquid fire retardant medium to the sealing assembly to immerse the entire cabin space, or can operate in a vacuum mode to form a vacuum environment in the inside of the sealing assembly. In this way, a stable and reliable combustion inhibition environment can be provided for the sealing assembly, thereby greatly reducing the possibility of combustion after thermal runaway.

[0184] In order to facilitate understanding of the technical solutions of the present application, the following will take the valve tower structure energy storage system as an example to explain and describe the present application in combination with some embodiments.

[0185] (1) The fire extinguishing device includes a gas protection device: according to ① a thermal runaway alarm signal or ② a gas detection alarm signal to switch the operation mode, ① and ② are OR logic, one condition is met to switch from the circulation mode to the replacement mode, to inhibit combustion and discharge the combustible gas generated by the battery cell thermal runaway outside the energy storage valve hall; otherwise, maintain the operation of the energy storage system in the circulation mode, that is, to drive the fire retardant medium to circulate and flow between the gas protection device and the sealing assembly.

[0186] (2) The cooling and fire extinguishing device includes a cooling medium and / or a fire extinguishing medium provided to the thermal runaway site. After the gas protection device is opened and replaced, the cooling and fire extinguishing device is started by the energy storage control device after judging the thermal diffusion degree of the battery cell. The criteria are as follows: ① the duration of the gas detection alarm is greater than or equal to Dmin (minutes), ② the voltage of at least E battery cells in the thermal runaway site (all taking the battery box as an example) is less than or equal to AV, and the temperature is greater than or equal to B℃, ③ the temperature of at least F battery cells in the adjacent battery box in the battery cabinet where the thermal runaway battery box is located is greater than or equal to C℃, ④ the energy storage control device obtains the positioning of the thermal runaway energy storage valve tower, and ⑤ the gas protection device is stopped. Among them, ④ and ⑤ are necessary conditions that must be met, while ①, ② and ③ only need to meet at least one. At this time, the cooling and fire extinguishing device is started, and the cooling medium and / or the fire extinguishing medium is sprayed into each battery cabinet of the thermal runaway energy storage valve tower, so as to effectively cool the thermal runaway battery cabinet and block the thermal diffusion between the battery boxes / battery cabinets.

[0187] Wherein, D is a preset time length, which can be in the range of 0-300 min; A is a first preset voltage threshold, which can be in the range of 0-5V; B is a first preset temperature threshold, which can be in the range of 100℃-700℃; C is a second preset temperature threshold, which can be in the range of 50℃-140℃; E is a first preset number, which can be in the range of 3-52; and F is a second preset number, which can be in the range of 3-52.

[0188] (3) The cooling and fire extinguishing device includes a cooling medium provided to the energy storage system. After the cooling and fire extinguishing device is opened to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site, the spraying function is started by the running personnel after comprehensive judgment. The judgment mainly includes: ① determining that a fire occurs according to the fire signal collected by the fire detector, ② there are at least E1 battery cells with a voltage less than or equal to A1V and a temperature greater than or equal to B1℃ in the thermal runaway battery cabinet where the thermal runaway battery cell is located, ③ the energy storage valve tower is stopped, ④ the energy storage control device obtains the positioning of the thermal runaway energy storage valve tower, and ⑤ the running personnel send observation confirmation instructions. Among them, ④ and ⑤ are necessary conditions that must be met, while ①, ② and ③ only need to meet at least one. At this time, the spraying function is started, and the cooling medium (water) is sprayed to the thermal runaway energy storage valve tower, so as to cool the support structure of the energy storage valve tower, the outer surface of the battery cabinet in the energy storage valve tower and the insulator.

[0189] Wherein, A1 is a second preset voltage threshold, which can be in the range of 0V-5V; B1 is a third preset temperature threshold, which can be in the range of 100℃-700℃; and E1 is a third preset number, which can be in the range of 3-52.

[0190] It should be understood that although the steps in the flowcharts involved in the embodiments described above are shown in sequence according to the arrows, the steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, the execution of the steps is not strictly limited in sequence, and the steps can be executed in other sequences. Moreover, at least some of the steps in the flowcharts involved in the embodiments described above can include multiple steps or multiple stages, which are not necessarily executed at the same time, but can be executed at different times, and the execution sequence of the steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least part of other steps or steps or stages in other steps.

[0191] Based on the same application concept, the embodiments of the present application also provide a fire control device for implementing the fire control method described above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more fire control device embodiments provided below can refer to the limitations of the fire control method described above, and will not be repeated here.

[0192] Please refer to FIG. 7, a fire control device of an energy storage system, comprising: a fire retardant control module 802, a thermal runaway analysis module 804 and a post-stage fire control module 806.

[0193] The fire retardant control module 802 is configured to control the operation of the fire retardant fire control device to provide fire retardant medium to the sealed component; the thermal runaway analysis module 804 is configured to detect the thermal runaway state of the energy storage system; and the post-stage fire control module 806 is configured to control the operation of the cooling and fire extinguishing device to provide cooling medium and / or fire extinguishing medium to the thermal runaway site in the case of thermal runaway.

[0194] In some embodiments, the post-stage fire control module 806 is further configured to control the operation of the cooling and fire extinguishing device to provide cooling medium to the thermal runaway site in the case of locating the thermal runaway site and stopping the operation of the fire retardant fire control device.

[0195] In some embodiments, the post-stage fire control module 806 is further configured to control the cooling and fire extinguishing device to discharge the mixed substance generated at the thermal runaway site to the outside of the energy storage system.

[0196] In some embodiments, the post-stage fire control module 806 is further configured to control the operation of the cooling and fire extinguishing device to provide cooling medium to the thermal runaway site in the case of locating the thermal runaway site and stopping the operation of the fire retardant fire control device, if the cooling start condition is met.

[0197] In some embodiments, the post-fire control module 806 is further configured to control the operation of the cooling fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site if the thermal runaway phenomenon of the thermal runaway site is not suppressed.

[0198] In some embodiments, the post-fire control module 806 is further configured to control the operation of the cooling fire extinguishing device to provide the cooling medium to the energy storage system.

[0199] In some embodiments, the post-fire control module 806 is further configured to control the operation of the cooling fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site if the thermal runaway site is located and the observation confirmation instruction is received.

[0200] In some embodiments, the post-fire control module 806 is further configured to control the operation of the cooling fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site if the thermal runaway site is located and the observation confirmation instruction is received, and the fire extinguishing start condition is met.

[0201] Referring to FIG. 8, in some embodiments, the device further comprises a displacement control module 902. The displacement control module 902 is configured to control the operation of the fire-retardant fire extinguishing device to displace the thermal runaway gas of the thermal runaway site to the outside of the energy storage system by the fire-retardant medium.

[0202] In some embodiments, the post-fire control module 806 is further configured to control the operation of the cooling fire extinguishing device to provide the cooling and / or fire extinguishing medium to the thermal runaway site if the thermal runaway occurs and the thermal runaway is not eliminated within a preset time period.

[0203] Each of the above fire control devices can be implemented by software, hardware, or a combination thereof, in whole or in part. Each of the above modules can be embedded in or independent of a processor in a computer device in hardware form, or stored in a memory in a computer device in software form, so as to be called and executed by a processor to perform the operations corresponding to each of the above modules.

[0204] In normal conditions, the above fire control device can control the fire-retardant fire extinguishing device to maintain operation, thereby providing the fire-retardant medium to the sealed assembly of the energy storage system, so that the sealed assembly is in a combustion suppression state, thereby reducing the possibility of thermal runaway of the energy storage system. In the case of fire-retardant failure of the fire-retardant fire extinguishing device, i.e., thermal runaway of the energy storage system, the cooling fire extinguishing device is controlled to operate to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site, thereby cooling and extinguishing the thermal runaway site. By this scheme, the energy storage system can be protected by the fire-retardant medium to reduce the possibility of thermal runaway, and in the case of thermal runaway, the thermal runaway site can be cooled and extinguished by the cooling medium and / or the fire extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0205] In some embodiments, a computer device is provided, which can be a terminal, and its internal structure diagram can be as shown in FIG. 9. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capability. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be achieved through WIFI, mobile cellular network, NFC (near field communication) or other technologies. The computer program is executed by the processor to implement a fire control method of an energy storage system.

[0206] Those skilled in the art can understand that the structure shown in FIG. 9 is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. A specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different component arrangement.

[0207] In some embodiments, a computer device is provided, which includes a memory and a processor, the memory stores a computer program, and the processor executes the computer program to implement the following steps:

[0208] controlling the operation of the fire extinguishing device to provide the fire extinguishing medium to the sealed assembly; and in the case of thermal runaway, controlling the operation of the cooling and fire extinguishing device to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site.

[0209] In some embodiments, a computer readable storage medium is provided, which stores a computer program, and the computer program is executed by a processor to implement the following steps: controlling the operation of the fire extinguishing device to provide the fire extinguishing medium to the sealed assembly; and in the case of thermal runaway, controlling the operation of the cooling and fire extinguishing device to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site.

[0210] In some embodiments, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the following steps: controlling the operation of the fire-retardant firefighting device to provide fire-retardant medium to the sealing assembly; in the event of a thermal runaway, controlling the operation of the cooling and / or fire-extinguishing device to provide cooling and / or fire-extinguishing medium to the thermal runaway site.

[0211] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, the processes of the above-mentioned embodiments can be included. Any reference to memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical storage, high-density embedded non-volatile memory, resistive memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration but not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The database involved in the embodiments provided in the present application can include at least one of a relational database and a non-relational database. The non-relational database can include a distributed database based on a block chain, etc., without being limited thereto. The processor involved in the embodiments provided in the present application can be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without being limited thereto.

[0212] The computer device, the computer readable storage medium and the computer program product can control the fire-retardant fire-fighting device to maintain operation, so as to provide the fire-retardant medium for the sealed assembly of the energy storage system, so that the sealed assembly is in a combustion suppression state, thereby reducing the possibility of thermal runaway of the energy storage system. In the case of fire-retardant failure of the fire-retardant fire-fighting device, that is, thermal runaway of the energy storage system, the cooling fire extinguishing device is controlled to operate, and the cooling medium and / or the fire extinguishing medium are provided to the thermal runaway site by the cooling fire extinguishing device, so as to cool and extinguish the thermal runaway site. By this scheme, the energy storage system can be protected by the fire-retardant medium in the case of no thermal runaway, and the thermal runaway site is cooled and extinguished by the cooling medium and / or the fire extinguishing medium in the case of thermal runaway, thereby greatly improving the fire safety of the energy storage system.

[0213] The application also provides an energy storage system comprising a fire-retardant fire-fighting device, a cooling fire extinguishing device and an energy storage control device, the fire-retardant fire-fighting device and the cooling fire extinguishing device being connected to the energy storage control device, and the energy storage control device being configured to execute the steps of the above method.

[0214] The operation principles of the fire-retardant fire-fighting device, the cooling fire extinguishing device and the energy storage control device are as shown in the above embodiments and the accompanying drawings, and will not be repeated here.

[0215] The energy storage system can control the fire-retardant fire-fighting device to maintain operation, so as to provide the fire-retardant medium for the sealed assembly of the energy storage system, so that the sealed assembly is in a combustion suppression state, thereby reducing the possibility of thermal runaway of the energy storage system. In the case of fire-retardant failure of the fire-retardant fire-fighting device, that is, thermal runaway of the energy storage system, the cooling fire extinguishing device is controlled to operate, and the cooling medium and / or the fire extinguishing medium are provided to the thermal runaway site by the cooling fire extinguishing device, so as to cool and extinguish the thermal runaway site. By this scheme, the energy storage system can be protected by the fire-retardant medium in the case of no thermal runaway, and the thermal runaway site is cooled and extinguished by the cooling medium and / or the fire extinguishing medium in the case of thermal runaway, thereby greatly improving the fire safety of the energy storage system.

[0216] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. 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. A fire control method for an energy storage system, comprising: Controlling the operation of the flame retardant fire fighting device to provide a flame retardant medium to the sealing assembly; the sealing assembly houses an energy storage unit; In the event of thermal runaway, the cooling and fire extinguishing device is controlled to operate to provide cooling medium and / or fire extinguishing medium to the thermal runaway site.

2. The method according to claim 1, wherein The control of the cooling and fire extinguishing device to provide cooling medium and / or fire extinguishing medium to the thermal runaway site includes: When the thermal runaway site is located and the flame retardant fire-fighting device stops operating, the cooling fire-extinguishing device is controlled to operate to provide cooling medium to the thermal runaway site.

3. The method according to claim 2, wherein: When the thermal runaway site is located and the flame retardant fire-fighting device stops operating, the method further includes: The cooling and fire extinguishing device is controlled to discharge the mixed substance generated at the thermal runaway site to the outside of the energy storage system.

4. The method according to claim 2 or 3, wherein: When the thermal runaway site is located and the flame retardant fire-fighting device stops operating, controlling the cooling fire-extinguishing device to operate to provide a cooling medium to the thermal runaway site includes: When the thermal runaway site is located and the flame retardant fire-fighting device stops running, if the cooling start condition is met, the cooling fire-extinguishing device is controlled to run to provide cooling medium to the thermal runaway site.

5. The method according to claim 4, wherein The cooling start condition includes at least one of the following: Item 1: The duration of the gas detection alarm at the thermal runaway site is greater than or equal to a preset duration; Item 2: In the thermal runaway site, the cell voltage of at least a first preset number of battery cells is less than or equal to a first preset voltage threshold, and the cell temperature of at least a first preset number of battery cells is greater than or equal to a first preset temperature threshold; Item 3: Among the sites adjacent to the thermal runaway site, the cell temperatures of at least a second preset number of battery cells are greater than or equal to a second preset temperature threshold.

6. The method according to any one of claims 1 to 5, wherein: The control of the cooling and fire extinguishing device to provide cooling medium and / or fire extinguishing medium to the thermal runaway site also includes: In the case that the thermal runaway phenomenon at the thermal runaway site is not suppressed, the cooling and fire extinguishing device is controlled to operate to provide a fire extinguishing medium to the thermal runaway site.

7. The method according to any one of claims 1 to 6, wherein: In the event of thermal runaway, the method further includes: controlling the operation of a cooling and fire extinguishing device to provide a cooling medium to the energy storage system.

8. The method according to claim 6, wherein: These methods also include: When the site temperatures of sites adjacent to the thermal runaway site are all within a preset normal temperature range, and / or the battery cell temperature of the thermal runaway site is less than or equal to a preset comparison temperature, it is determined that the thermal runaway phenomenon of the thermal runaway site is suppressed.

9. The method according to claim 6, wherein: The controlled cooling and fire extinguishing device operates to provide a fire extinguishing medium to the thermal runaway site, including: When a thermal runaway site is located and an observation confirmation instruction is received, the cooling and fire extinguishing device is controlled to operate to provide a fire extinguishing medium to the thermal runaway site.

10. The method according to claim 9, wherein: When the thermal runaway site is located and an observation confirmation instruction is received, controlling the cooling and fire extinguishing device to operate to provide a fire extinguishing medium to the thermal runaway site includes: When the thermal runaway site is located and an observation confirmation instruction is received, if the fire extinguishing start condition is met, the cooling fire extinguishing device is controlled to operate to provide the fire extinguishing medium to the thermal runaway site.

11. The method according to claim 10, wherein: The fire extinguishing initiation condition includes at least one of the following: Item 1: Determine the occurrence of a fire based on the fire signal collected by the fire detector; Item 2: In the thermal runaway site, the cell voltage of at least a third preset number of battery cells is less than or equal to the second preset voltage threshold, and the cell temperature of at least a third preset number of battery cells is greater than or equal to the third preset temperature threshold; Item 3: The energy storage system is shut down.

12. The method according to any one of claims 1 to 11, wherein: In the event of thermal runaway, the method further includes: controlling the flame retardant fire-fighting device to perform a replacement operation so as to squeeze and discharge the thermal runaway gas at the thermal runaway site to the outside of the energy storage system through the flame retardant medium.

13. The method according to claim 12, wherein: In the event of thermal runaway, controlling the cooling and fire extinguishing device to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site includes: In the event of thermal runaway and the thermal runaway is not resolved within a preset time, the cooling and fire extinguishing device is controlled to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site.

14. The method according to any one of claims 1 to 13, wherein: The method further comprises: In case that a thermal runaway alarm signal and / or a gas detection alarm signal is received, it is determined that a thermal runaway occurs.

15. The method according to any one of claims 1 to 14, wherein: The controlling the flame retardant fire fighting device to provide the flame retardant medium to the sealing assembly includes at least one of the following: Item 1: Control the operation of flame retardant fire protection devices to provide flame retardant medium to the battery cabinet of the energy storage system; Item 2: Control the operation of the flame retardant fire-fighting device to provide flame retardant medium to the electrical box of the energy storage system; Item 3: Control the operation of the flame retardant fire-fighting device to provide flame retardant medium to the container of the energy storage system.

16. The method according to any one of claims 1 to 15, wherein: The controlling of the flame retardant fire fighting device to provide the flame retardant medium to the sealing component includes any one of the following: Item 1: Controlling the flame retardant fire fighting device to drive the gaseous flame retardant medium and / or the liquid flame retardant medium to circulate in the flame retardant fire fighting device and the sealing assembly; Item 2: Controlling the operation of the flame retardant fire protection device to provide gaseous flame retardant medium and / or liquid flame retardant medium to immerse the interior of the sealed component; Item 3: Control the vacuum operation of the flame retardant fire-fighting device to form a vacuum environment inside the sealing component.

17. A fire control device for an energy storage system, comprising: A flame retardant control module, used to control the operation of the flame retardant fire-fighting device to provide a flame retardant medium to the sealing assembly; the sealing assembly accommodates an energy storage unit; Thermal runaway analysis module, used to detect thermal runaway conditions of energy storage systems; The post-stage fire control module is used to control the operation of the cooling and fire extinguishing device in the event of thermal runaway, so as to provide cooling medium and / or fire extinguishing medium to the thermal runaway site.

18. A computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method according to any one of claims 1 to 16 when executing the computer program.

19. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 16 are implemented.

20. A computer program product comprising a computer program, which, when executed by a processor, implements the steps of the method according to any one of claims 1 to 16.

21. An energy storage system comprising a flame retardant fire fighting device, a cooling fire extinguishing device and an energy storage control device, wherein the flame retardant fire fighting device and the cooling fire extinguishing device are respectively connected to the energy storage control device, and the energy storage control device is used to perform the steps of the method according to any one of claims 1 to 16.

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