Energy storage system, fire control method and device thereof and computer equipment

Abstract

The invention relates to an energy storage system and a fire control method and device thereof, computer equipment, a storage medium and a computer program product, under normal conditions, a flame-retardant fire control device can be controlled to maintain operation, so that a flame-retardant medium is provided for a sealing assembly of the energy storage system, and the sealing assembly is in a combustion inhibition state; therefore, the possibility of thermal runaway of the energy storage system is reduced. And under the condition that flame retardance of the flame-retardant fire-fighting device fails, namely thermal runaway occurs in the energy storage system, the cooling and fire extinguishing device is controlled to operate, and a cooling medium and / or a fire extinguishing medium are / is provided for the thermal runaway site through the cooling and fire extinguishing device, so that the thermal runaway site is cooled and extinguished. According to the scheme, under the condition that thermal runaway does not occur in the energy storage system, protection can be carried out through the flame-retardant medium, the possibility of thermal runaway is reduced, under the condition that thermal runaway occurs, the thermal runaway site is cooled and extinguished through the temperature medium and / or the fire extinguishing medium, and the fire safety of the energy storage system is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage system and a fire control method, device, computer equipment, storage medium, and computer program product thereof. Background Art

[0002] With the rapid development of science and technology, high-voltage direct-mounted energy storage technology has gradually gained application due to its advantages such as high modularity, good economic benefits, and high operational reliability. High-voltage direct-mounted energy storage systems generally consist of multiple connected energy storage submodules, each supported by insulators. Each energy storage submodule includes multiple connected battery cabinets, each of which includes multiple connected electrical boxes, each of which contains multiple battery cells. If the battery cells inside the electrical box suffer from short circuits, overcharge, over-discharge, or thermal abuse, thermal runaway can easily occur, leading to safety accidents and failing to meet the fire safety requirements of the energy storage system. Summary of the Invention

[0003] Based on this, it is necessary to provide an energy storage system and its fire control method, device, computer equipment, storage medium and computer program product to improve the fire safety of the energy storage system.

[0004] The present application provides a fire control method for an energy storage system, comprising: controlling the operation of a flame-retardant fire-fighting device to provide a flame-retardant medium to a sealing assembly; the sealing assembly accommodates an energy storage unit; and in the event of thermal runaway, controlling the operation of a cooling and fire-extinguishing device to provide a cooling medium and / or a fire-extinguishing medium to the thermal runaway site.

[0005] The fire control method for the energy storage system described above can, under normal circumstances, control the flame-retardant fire-fighting device to maintain operation, thereby providing a flame-retardant medium to the sealing component of the energy storage system, so that the sealing component is in a combustion-suppressed state, thereby reducing the possibility of thermal runaway of the energy storage system. In the event that the flame-retardant fire-fighting device fails to function, that is, in the event that thermal runaway occurs in the energy storage system, the cooling and fire-extinguishing device is controlled to operate, and a cooling medium and / or a fire-extinguishing medium is provided to the thermal runaway site through the cooling and fire-extinguishing device, thereby cooling and extinguishing the thermal runaway site. Through this solution, the flame-retardant medium can be used to protect the energy storage system when thermal runaway does not occur, thereby reducing the possibility of thermal runaway. In the event that thermal runaway occurs, the thermal runaway site can be cooled and extinguished by a warm medium and / or a fire-extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0006] In some embodiments, the cooling and fire-extinguishing device is controlled to operate to provide cooling medium and / or fire-extinguishing medium to the thermal runaway site, including: when the thermal runaway site is located and the flame retardant fire-fighting device stops operating, the cooling and fire-extinguishing device is controlled to operate to provide cooling medium to the thermal runaway site.

[0007] In the case that the thermal runaway site is located and the fire extinguishing device stops running, 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. The thermal runaway phenomenon of the thermal runaway battery cell is inhibited, and the spread of the thermal runaway phenomenon to adjacent battery cells is alleviated.

[0008] In some embodiments, in the case that the thermal runaway site is located and the fire extinguishing device stops running, the cooling and fire extinguishing device is further controlled to discharge the mixture generated at the thermal runaway site to the outside of the energy storage system.

[0009] The above scheme can discharge the mixture generated when the cooling and fire extinguishing device starts to cool the thermal runaway site from the energy storage system, and reduce the risk of explosion of the energy storage system.

[0010] In some embodiments, in the case that the thermal runaway site is located and the fire extinguishing device stops running, the cooling and fire extinguishing device is controlled to run to provide the cooling medium to the thermal runaway site, comprising: in the case that the thermal runaway site is located and the fire extinguishing device stops running, if a 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.

[0011] The above scheme further requires that the cooling start condition be met before the cooling and fire extinguishing device is controlled to start running in the case that the thermal runaway site is located and the fire extinguishing device stops running, which can effectively improve the starting reliability of the cooling and fire extinguishing device.

[0012] In some embodiments, the cooling start condition comprises at least one of the following items:

[0013] The first item is that the gas detection alarm duration of the thermal runaway site is greater than or equal to a preset time length; the second item is that 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; and the third item is that 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.

[0014] In the above scheme, in the case that the positioning to the thermal runaway site and the stopping of the operation of the fire extinguishing device, 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 the cell temperature of at least the second preset number of cells in the site adjacent to the thermal runaway site is greater than or equal to the second preset temperature threshold, at least one of the three conditions, the cooling and fire extinguishing device is controlled to open the delivery of the cooling medium, which can effectively improve the opening accuracy of the cooling and fire extinguishing device.

[0015] 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 further includes: in the case that the thermal runaway phenomenon of the thermal runaway site is not inhibited, the cooling and fire extinguishing device is controlled to operate to provide the fire extinguishing medium to the thermal runaway site.

[0016] In the above scheme, the cooling and 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 and fire extinguishing device can be opened to deliver the fire extinguishing medium, further improving the operation safety of the energy storage system.

[0017] In some embodiments, in the case of thermal runaway, the method further includes: controlling the operation of the cooling and fire extinguishing device to provide cooling medium to the energy storage system.

[0018] In the above scheme, in the case of thermal runaway, the cooling and fire extinguishing device can be controlled to provide cooling medium to the energy storage system, 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.

[0019] In some embodiments, the fire control method of the energy storage system includes: in the case that the site temperature of the site adjacent to the thermal runaway site is in the preset normal temperature range, and / or the cell temperature of the thermal runaway site is less than or equal to the preset comparison temperature, it is determined that the thermal runaway phenomenon of the thermal runaway site is inhibited.

[0020] 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 or comparing the cell temperature of the thermal runaway site, which has high determination accuracy.

[0021] In some embodiments, the control of the cooling and fire extinguishing device to operate to provide the fire extinguishing medium to the thermal runaway site comprises: in the case that the thermal runaway site is located and the observation confirmation instruction is received, the control of the cooling and fire extinguishing device to operate to provide the fire extinguishing medium to the thermal runaway site.

[0022] The above scheme needs to send the observation confirmation instruction after the thermal runaway site is located and the personnel observation is received, and then the cooling and fire extinguishing device is started to deliver the fire extinguishing medium, 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.

[0023] In some embodiments, the control of the cooling and fire extinguishing device to operate to provide the fire extinguishing medium to the thermal runaway site in the case that the thermal runaway site is located and the observation confirmation instruction is received comprises: in the case that the thermal runaway site is located and the observation confirmation instruction is received, if the fire extinguishing start condition is met, the control of the cooling and fire extinguishing device to operate to provide the fire extinguishing medium to the thermal runaway site.

[0024] The above scheme needs to meet the fire extinguishing start condition in the case that the thermal runaway site is located and the observation confirmation instruction sent after the personnel observation is received, and then the cooling and fire extinguishing device is controlled to deliver the fire extinguishing medium, which can effectively improve the start reliability of the cooling and fire extinguishing device.

[0025] In some embodiments, the fire extinguishing start condition comprises at least one of the following items:

[0026] 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 value, and the cell temperature of at least a third preset number of cells is greater than or equal to a third preset temperature threshold value; and the third item is that the energy storage system is in energy storage shutdown.

[0027] The above scheme needs to meet at least one of the following conditions in the case that the thermal runaway site is located and the observation confirmation instruction sent after the personnel observation is received: the fire occurs according to the fire signal, 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 value and the cell temperature is greater than or equal to a third preset temperature threshold value, and the energy storage system is in energy storage shutdown, and then the cooling and fire extinguishing device is controlled to deliver the fire extinguishing medium to the thermal runaway site, which can effectively improve the start accuracy of the cooling and fire extinguishing device.

[0028] In some embodiments, in the case that the thermal runaway occurs, the fire extinguishing device is further controlled to replace the operation to extrude and discharge the thermal runaway gas of the thermal runaway site to the outside of the energy storage system through the fire-retardant medium.

[0029] In the above scheme, in the case of thermal runaway, the fire extinguishing device can also be switched to replacement 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, so as to provide an oxygen-free and non-combustion gas environment for the thermal runaway site, and reduce the possibility of fire of the battery cell of the thermal runaway site due to thermal runaway.

[0030] In some embodiments, the control of the cooling and fire extinguishing device to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site in the case of thermal runaway includes: in the case of thermal runaway and the thermal runaway not being eliminated within a preset time period, controlling the cooling and fire extinguishing device to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site.

[0031] In the above scheme, in the case of thermal runaway and the thermal runaway not being eliminated within a preset time period, the cooling and fire extinguishing device is started again to operate, which improves the opening accuracy of the cooling and fire extinguishing device.

[0032] In some embodiments, the fire control method of the energy storage system further includes: in the case of receiving the thermal runaway alarm signal and / or the gas detection alarm signal, determining that thermal runaway occurs.

[0033] In the above scheme, the occurrence of thermal runaway can be determined by the thermal runaway alarm signal, and the occurrence of thermal runaway can also be determined by the gas detection alarm signal, which has high accuracy in determining thermal runaway.

[0034] In some embodiments, the control of the fire-retardant fire extinguishing device to operate to provide fire-retardant medium to the sealed assembly includes at least one of the following items:

[0035] 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.

[0036] The second item is to control the fire-retardant fire extinguishing device to operate to provide fire-retardant medium to the electric box of the energy storage system.

[0037] 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.

[0038] In the above scheme, the sealed assembly can be one or more of the battery cabinet, the electric box and the container according to the type of the energy storage system, and the fire-retardant fire extinguishing device can provide a combustion suppression environment for the battery cabinet, the electric box or the container, thereby reducing the possibility of combustion of the battery cabinet, the electric box or the container due to thermal runaway.

[0039] In some embodiments, the control of the fire-retardant fire-fighting device to provide the fire-retardant medium to the sealed assembly comprises any one of the following: the first one is to control the fire-retardant fire-fighting device to drive the gaseous fire-retardant medium and / or the liquid fire-retardant medium to circulate and flow in the fire-retardant fire-fighting device and the sealed assembly; the second one is to control the fire-retardant fire-fighting device to provide the gaseous fire-retardant medium and / or the liquid fire-retardant medium to immerse the interior of the sealed assembly; and the third one is to control the fire-retardant fire-fighting device to operate in a vacuum mode to form a vacuum environment in the interior of the sealed assembly.

[0040] In the above solution, when the fire-retardant fire-fighting device provides the fire-retardant medium to the sealed assembly, the fire-retardant fire-fighting device can drive the gaseous fire-retardant medium and / or the liquid fire-retardant medium to circulate and flow into the sealed assembly, or can input the gaseous fire-retardant medium and / or the liquid fire-retardant medium to the sealed assembly to immerse the entire cabin space, or can operate in a vacuum mode to form a vacuum environment in the interior of 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.

[0041] The application further provides a fire-fighting control device, comprising: a fire-retardant control module configured to control a fire-retardant fire-fighting device to provide a fire-retardant medium to a sealed assembly; the sealed assembly houses an energy storage unit; a thermal runaway analysis module configured to detect a thermal runaway state of the energy storage system; and a post-stage fire-fighting control module configured to control a cooling and fire extinguishing device to provide a cooling medium and / or a fire extinguishing medium to a thermal runaway site in the case of thermal runaway.

[0042] The application further 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.

[0043] The application further 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.

[0044] The application further 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.

[0045] The application further 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 respectively 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

[0046] Various other advantages and benefits will become apparent to those of ordinary skill in the art, upon reading the following detailed description of the preferred embodiment. The accompanying drawings are included to provide a better understanding of the preferred embodiment, and are not intended to restrict the application of the application. Moreover, in the drawings, like reference numerals refer to similar components, and wherein:

[0047] Figure 1 A schematic diagram of a fire control method for some embodiments of the application;

[0048] Figure 2 A schematic diagram of a gas protection device for some embodiments of the application;

[0049] Figure 3 A schematic diagram of a cooling and fire extinguishing device for some embodiments of the application;

[0050] Figure 4 A schematic diagram of a cooling and fire extinguishing device for some embodiments of the application;

[0051] Figure 5 A schematic diagram of an energy storage valve tower for some embodiments of the application;

[0052] Figure 6 A schematic diagram of a battery cabinet for some embodiments of the application;

[0053] Figure 7 A schematic diagram of a fire control device for some embodiments of the application;

[0054] Figure 8 A schematic diagram of a fire control device for some embodiments of the application;

[0055] Figure 9 A schematic diagram of a computing device for some embodiments of the application. DETAILED DESCRIPTION

[0056] The embodiments of the technical solutions of the 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 application, and therefore only serve as examples, and cannot limit the protection scope of the 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 this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the 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" and the like 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 "multiple" is more than two, unless otherwise explicitly specified and limited.

[0059] Reference to "embodiments" herein means that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments of the present application, the term "and / or" is only used to describe the 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 present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0062] In the description of the embodiments of the present 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 present 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 widely, not only is applied to the energy storage system of water power, thermal power, wind power and solar power station, but also is widely applied to electric bicycle, electric motorcycle, electric vehicle and other electric vehicles, as well as 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 provided with a heptafluoropropane or perfluoroketone type fire extinguishing system, which sprays extinguishing agent to cool down the battery cell when the battery cell is in thermal runaway, and the combustible gas generated by the battery cell thermal runaway is discharged. However, the combustible gas is directly mixed with air after being discharged from the closed space such as the container, and there is a risk of deflagration. 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 battery cell is short-circuited, overcharged, over-discharged, and thermally abused during operation, thermal runaway is likely to occur, thereby generating 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 it encounters a fire source. Therefore, it can be considered to suppress the combustion of the environment in which the battery cell is located, or to timely deliver cooling medium and / or fire extinguishing medium to the thermal runaway location when the battery cell is in thermal runaway, to alleviate the phenomenon of fire caused by thermal runaway.

[0066] Based on the above considerations, the technical scheme of the embodiments of the present application sets a fire-retardant fire extinguishing device in the energy storage system, which can provide fire-retardant medium for the sealed assembly, so that the battery cell in the sealed assembly is in a combustion-suppressed environment, to reduce the possibility of combustion or explosion due to thermal runaway of the battery cell. At the same time, a cooling and fire extinguishing device can also be provided in the energy storage system. When the fire-retardant fire extinguishing device fails to suppress, i.e. in the case of thermal runaway of the energy storage system, the cooling and fire extinguishing device is controlled to start operation, and cooling medium and / or fire extinguishing medium are delivered to the location where thermal runaway occurs, i.e. the thermal runaway site, to cool and extinguish the fire at the thermal runaway site.

[0067] In the above manner, the battery cell can be protected by the fire-retardant medium when the energy storage system does not occur thermal runaway, to reduce the possibility of thermal runaway, and 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 in the embodiments of the present application can be applied in a high-voltage direct-hanging type energy storage system or a container type energy storage system, and is not specifically limited. 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 a high-voltage direct-hanging energy storage system of other structure types, as long as the energy storage system is in a multi-layer structure form, and is not specifically limited. Among them, the energy storage system in a multi-layer structure form, that is, a plurality of battery cells are connected in series and / or in parallel and are arranged in the same electric box; a plurality of electric boxes can be connected in series and / or in parallel and built in the same battery cabinet; a plurality of battery cabinets are further connected in series and / or in parallel to form an energy storage sub-module; and the energy storage sub-modules are supported by insulating supports to form an energy storage system.

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

[0070] Please refer to Figure 1 The present application provides a fire control method of an energy storage system, comprising steps 102 and 104.

[0071] Step 102, controlling the operation of the fire-retardant fire-fighting device to provide fire-retardant medium to the sealing assembly.

[0072] Specifically, the sealing assembly contains an energy storage unit. The fire-retardant fire-fighting device is a device that can provide fire-retardant medium to the sealing assembly of the energy storage system during the operation of the energy storage system, so as to form a combustion inhibition environment for the sealing assembly. The sealing assembly is a sealed space for storing the energy storage unit of the energy storage system, and specifically, the sealing assembly can include but is not limited to at least one of an energy storage electric box (or simply referred to as an electric box), an energy storage electric cabinet (or simply referred to as a battery cabinet), an energy storage sub-module, a battery room in an energy storage electric cabinet, an energy storage container, a battery room in a container, and an energy storage valve tower. The energy storage unit is a power supply for storing electrical energy, and the energy storage unit can include at least one of a battery, an energy storage electric box, a battery room, and an energy storage sub-module. The specific type of fire-retardant medium is not unique, and 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 specifically limited.

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

[0074] The thermal runaway refers to a phenomenon that the current and temperature of the battery cell are both increased and promote each other during the charging and discharging process. The gas fire-retardant medium refers to a gas capable of inhibiting or even blocking the combustion phenomenon. It should be pointed out that the specific type of the gas fire-retardant medium is not unique, and any gas having the function of combustion inhibition can be used, such as nitrogen, carbon dioxide or inert gas, and the specific type is not limited.

[0075] In the case where the thermal runaway does not occur, the gas protection device of the energy storage system drives the gas fire-retardant medium to inject the sealed assembly, which can be specifically 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, and in the case where the thermal runaway does not occur, the same liquid fire-retardant medium can be driven by the fire-retardant protection device to circulate and flow or to immerse the inside of the sealed assembly, so that the sealed assembly is in the combustion inhibition state.

[0076] The specific structure of the gas protection device is not unique, and for the example of the circulation of the fire-retardant medium, as long as it can have two different operating modes, one is the circulation mode, in which the gas fire-retardant medium can circulate and flow between 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, the valve tower structure can be specifically squeezed and discharged to the outside of the energy storage valve hall.

[0077] For example, in one embodiment, taking the sealed assembly as a battery cabinet, 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. Specifically, the circulation air outlet of the gas protection device is provided with a plurality of gas branch circuits, each gas branch circuit is connected to one battery cabinet, and the air outlets of the battery cabinets are connected to one main gas circuit. The gas generated by the gas protection device can circulate and flow 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, so that in the replacement mode, the gas in the battery cabinet can be replaced and discharged to the external environment, thereby reducing the risk of deflagration.

[0078] Further, in a more detailed embodiment, please refer to Figure 2The gas protection device 200 also includes a flame retardant medium source 201, a thermal runaway detection component 202, a circulation component 203 (which can be a circulation fan), a medium discharge component 204 (which can be an electric three-way valve) and a fire controller 205. The thermal runaway detection component 202 and the medium discharge component 204 are respectively connected to the fire controller 205. The inlet of the medium discharge component 204 is connected to the circulation component 203 through an air path. The circulation component 203 is connected to the air outlet of the battery cabinet 100 through an air path. The thermal runaway detection component 202 is arranged in the air path between the circulation component 203 and the air outlet of the battery cabinet 100; the first outlet of the medium discharge component 204 is connected to the flame retardant medium source 201 through an air path. The flame retardant medium source 201 is respectively connected to the air inlet of each battery cabinet 100 through an air path. The second outlet of the medium discharge component 204 is connected to the external environment through an air path. In this way, in the circulation mode, the fire controller 205 only needs to control the inlet of the medium discharge component 204 to be connected to the first outlet, so that the gas flame retardant medium generated by the flame retardant medium source 201 can be 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 controller 205 controls the inlet of the medium discharge component 204 to be connected to the second outlet, so that the gas flame retardant medium generated by the flame retardant medium source 201 can be transmitted to the battery cabinet 100, and the gas originally stored in the battery cabinet 100 can be replaced and discharged.

[0079] It should be noted that, in one embodiment, the control functions of the fire controller 205 may be integrated into the energy storage control device, that is, the energy storage control device serves as the fire controller 205. In another embodiment, the fire controller 205 may also be a device independent of the energy storage control device and be in communication with the energy storage control device.

[0080] Furthermore, if Figure 2 As shown, in order to improve the operational reliability of the gas protection device 200, a filter component 206 may be further provided on the gas path between the circulation component 203 and the medium discharge component 204 to filter impurities that may exist in the pipeline.

[0081] The specific structure of the flame retardant medium source 201 is not unique. In a more detailed embodiment, as shown in FIG. Figure 2 As shown, using nitrogen as the gaseous flame-retardant medium (an inert gas may also be used in other embodiments), the flame-retardant medium source 201 includes a nitrogen generator, a gas storage tank, a pressure reducing valve, and a nitrogen surge tank, which are connected in sequence. The nitrogen surge tank is located in the gas path between the first outlet of the medium discharge assembly 204 and the battery cabinet 100. In this way, the nitrogen generated by the nitrogen generator can be transferred to the gas storage tank for storage. When needed, the nitrogen is discharged from the gas storage tank, passes through the pressure reducing valve, enters the nitrogen surge tank, and is then transferred to the battery cabinet 100 via the gas path.

[0082] The thermal runaway gas is combustion gas generated due to thermal runaway, mixed with air and gas fire-retardant medium to form gas in the case of thermal runaway of the energy storage system. The thermal runaway battery cabinet is a battery cabinet in which thermal runaway occurs. In actual scenarios, one or more electric boxes in the battery cabinet can have thermal runaway, and one or more electric cells in the electric box having thermal runaway can have thermal runaway.

[0083] As shown in the above embodiment, 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, and 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 circulation flow control of the gas fire-retardant medium in the battery cabinet. In the case of thermal runaway, the fire control device controls the medium discharge assembly to switch under the action of the relevant instructions sent by the energy storage control device, so that the medium discharge assembly switches to be 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.

[0084] It should be pointed out that in other embodiments, the gas protection device can not be provided with the fire control device, and the medium discharge assembly and the thermal runaway detection assembly are 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 detail.

[0085] 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.

[0086] Specifically, the cooling medium is a medium that can absorb heat to reduce the temperature of the electric cell, electric box or battery cabinet, etc. The fire extinguishing medium is a medium that can extinguish the fire source when the 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. Specifically, the thermal runaway site can be a sealed assembly in which the thermal runaway electric cell is located, such as an electric box, a battery cabinet or a container, etc. which is not limited here.

[0087] In actual scenarios, after the thermal runaway of the energy storage system, 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 provide cooling medium to the thermal runaway site first, and then provide fire extinguishing medium to the thermal runaway site under certain conditions; or the cooling and fire extinguishing device can be controlled to operate to provide fire extinguishing medium to the thermal runaway site first, and then provide cooling medium to the thermal runaway site under certain conditions.

[0088] In general, the fire control method of the energy storage system can control the fire-retardant fire extinguishing device to maintain operation, thereby providing 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 and fire extinguishing device is controlled to operate, and the cooling and fire extinguishing device provides cooling medium and / or 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 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 fire extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0089] In some embodiments, the cooling and fire extinguishing device is controlled to operate to provide cooling medium and / or fire extinguishing medium to the thermal runaway site, including: in the case that the thermal runaway site is located and the fire-retardant fire extinguishing device stops operating, the cooling and fire extinguishing device is controlled to operate to provide cooling medium to the thermal runaway site.

[0090] Specifically, 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 is in thermal runaway, and the specific location is not limited.

[0091] In the case of thermal runaway, the energy storage valve control device will send a shutdown instruction to the fire-retardant fire extinguishing device (such as a gas protection device), and under the action of the shutdown instruction, the fire-retardant fire extinguishing device stops operating and feeds back a shutdown success signal to the energy storage control device. In addition, the energy storage control device can also locate the cell that is in thermal runaway at this time in combination with the cell temperature of each cell, and according to the location of the cell, the electric box, the battery cabinet or the container in which the cell is located can be determined in sequence.

[0092] The specific type of the cooling and fire extinguishing device is not unique. In an embodiment, the cooling and fire extinguishing device can be a cooling and fire extinguishing device. The specific structure of the cooling and fire extinguishing device is not unique, as long as the device can spray cooling medium and / or fire extinguishing medium into the thermal runaway battery cabinet under the condition of starting operation, so as to realize the cooling and fire extinguishing operation of the thermal runaway battery cabinet. For example, in a more detailed embodiment, the thermal runaway site is taken as an example to explain and illustrate the thermal runaway battery cabinet (in other embodiments, it can also be an electric box or a container).

[0093] Please refer to Figure 3 , the cooling and fire extinguishing device 600 includes a mode switching valve 603, a communication-connected fire extinguishing agent generating device 601 and a fire control controller 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. In this way, when cooling and fire extinguishing are needed, the fire extinguishing agent generating device 601 is controlled to be opened by the fire control controller 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 this process, the gas generated by the battery cabinet is transmitted to the external environment through the mode switching valve 603. The fire control controller 205 of the cooling and fire extinguishing device 600 and the fire control controller of the flame-retardant fire extinguishing device can be shared, or can be separately arranged, which is not limited here.

[0094] Further, in an embodiment, the cooling medium is a fire extinguishing agent, and the cooling and fire extinguishing device 600 further includes 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.

[0095] The pipeline of the cooling and fire extinguishing device 600 and the pipeline of the flame-retardant fire extinguishing device can be shared, or different transmission paths can be arranged for the cooling and fire extinguishing device 600 and the flame-retardant fire extinguishing device, which is not limited in particular. It can be understood that under the condition that the cooling and fire extinguishing device 600 is opened and operated, the transmission path between the flame-retardant fire extinguishing device and the battery cabinet (i.e. the sealing assembly, which can also be an electric box or a container) should be closed, so as to reduce the mutual influence between the gas flame-retardant medium and the cooling medium, and improve the operation reliability of the cooling and fire extinguishing device 600.

[0096] Under the condition that the thermal runaway site is located and the flame-retardant fire extinguishing device stops operating, the energy storage control device controls the cooling and fire extinguishing device to be opened and operated, and simultaneously inputs the cooling medium into each battery cabinet (or electric box, container) corresponding to the thermal runaway site through the shared pipeline or independent pipeline of the flame-retardant fire extinguishing device. While extinguishing the thermal runaway battery cabinet, the remaining battery cabinets without thermal runaway can also be cooled to alleviate the spread of thermal runaway.

[0097] It can be understood that, similar to the above-mentioned gas protection device, in another embodiment, the cooling medium can be transmitted to each battery cabinet independently. In the event of thermal runaway in any battery cabinet, the thermal runaway battery cabinet is cooled and extinguished, while the battery cabinets that have not experienced thermal runaway do not need to be cooled and extinguished, thereby reducing the consumption of cooling medium.

[0098] The above scheme, when the thermal runaway site is located and the flame retardant fire-fighting device stops operating, starts the cooling fire-extinguishing device to transport cooling medium to the thermal runaway site to reduce the temperature of the battery cell at the thermal runaway site. While suppressing the thermal runaway phenomenon of the thermal runaway battery cell, it can also alleviate the spread of the thermal runaway phenomenon to adjacent battery cells.

[0099] In some embodiments, when the thermal runaway site is located and the flame retardant fire-fighting device stops operating, it also includes: 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.

[0100] Specifically, the mixed substance, or cooling medium, is thermally input into the thermal runaway battery cabinet to cool it down. A reaction occurs within the thermal runaway battery cabinet, and the resulting mixed substance can be gaseous or include particulate matter produced by combustion, without limitation. As shown in the above embodiment, the cooling and fire extinguishing device includes a mode switching valve. During the cooling and fire extinguishing process, the mode switching valve can be controlled to open, allowing the mixed substance to be discharged to the external environment through the mode switching valve. This will not be further described here.

[0101] The above solution can discharge the generated mixed substances out of the energy storage system when the cooling and fire extinguishing device is turned on to cool the thermal runaway site, thereby reducing the risk of explosion in the energy storage system.

[0102] In some embodiments, 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 a cooling medium to the thermal runaway site, including: when the thermal runaway site is located and the flame retardant fire-fighting device stops operating, if the cooling start conditions are met, the cooling fire-extinguishing device is controlled to operate to provide a cooling medium to the thermal runaway site.

[0103] Specifically, the cooling start-up conditions are the conditions that must be met for the cooling fire extinguishing device to start delivering cooling medium. In this embodiment, in addition to locating the thermal runaway site and shutting down the flame retardant firefighting device, the cooling start-up conditions must also be met for the cooling fire extinguishing device to start delivering cooling medium. Otherwise, the cooling fire extinguishing device will not start operating.

[0104] The above scheme, when the thermal runaway site is located and the flame retardant fire-fighting device stops operating, must also meet the cooling start-up conditions, and then control the cooling fire-extinguishing device to start operation, which can effectively improve the opening reliability of the cooling fire-extinguishing device.

[0105] In some embodiments, the cooling start condition comprises at least one of the following:

[0106] The first item: the gas detection alarm duration of the thermal runaway site is greater than or equal to a preset time length.

[0107] The second item: in the thermal runaway site, the cell voltage of at least a first preset number of cells 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.

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

[0109] Specifically, the cooling start condition is not unique, and the cooling extinguishing device can be controlled to start running when at least one of the following three conditions is met. First, the gas detection alarm duration of the thermal runaway site (which can be a thermal runaway battery cabinet, electric box or container) is greater than or equal to a preset time length; second, 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; third, in the site adjacent to the thermal runaway site, the cell temperature of at least a second preset number of cells is greater than or equal to a second preset temperature threshold.

[0110] 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 in actual scenarios. For example, in a more detailed embodiment, 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 the cooling and extinguishing when a small number of cells are abnormal, and improve the opening speed of the cooling and extinguishing device. Setting the maximum value of the first preset number to 52 can start the cooling and extinguishing when a large number of cells are abnormal, so that the opening of the cooling and extinguishing device is necessarily carried out in the case of thermal runaway, and the opening accuracy of the cooling and extinguishing device is improved. Therefore, in actual scenarios, the first preset number can be set to 3-52 in combination with different considerations.

[0111] The size of the first preset voltage threshold is not unique, and will be different according to the type of the battery under the actual scene. For example, in a more detailed embodiment, the first preset voltage threshold can be set to 0V-5V, that is, 5V, or any value between 0V-5V. Setting the first preset voltage threshold to 0V, at this time, the battery voltage needs to be reduced to 0V before the battery is considered to have a thermal runaway anomaly, so that the opening of the cooling and fire extinguishing device must be performed in the case of thermal runaway of the battery, improving the opening accuracy of the cooling and fire extinguishing device. Setting the first preset voltage threshold to 5V makes the battery voltage threshold lower than or equal to 5V, which is considered to have a thermal runaway anomaly, improving the opening speed of the cooling and fire extinguishing device.

[0112] The size of the second preset number is not unique, and will be different according to the number of adjacent sites and the total number of batteries in each site under the actual scene. For example, in a more detailed embodiment, the second preset number can be set to 3-52, that is, 3, 52, or any number between 3-52. Similarly, the minimum value of the second preset number is 3, which can start cooling and fire extinguishing in time when a small number of batteries in adjacent sites have an anomaly, improving the opening speed of the cooling and fire extinguishing device. Setting the maximum value of the second preset number to 52 can start cooling and fire extinguishing when a large number of batteries in adjacent sites have an anomaly, so that the opening of the cooling and fire extinguishing device must be performed in the case of thermal runaway of the current site, improving the opening accuracy of the cooling and fire extinguishing device.

[0113] The size of the first preset temperature threshold is not unique, and will be different according to the type of the battery under the actual scene. For example, in a more detailed embodiment, the first preset temperature threshold can be set to 100℃-700℃, that is, 100℃, 700℃, or any value between 100℃-700℃. Setting the first preset temperature threshold to 700V, at this time, the battery temperature needs to be raised to greater than or equal to 700℃ before the battery is considered to have a thermal runaway anomaly, so that the opening of the cooling and fire extinguishing device must be performed in the case of thermal runaway of the battery, improving the opening accuracy of the cooling and fire extinguishing device. Setting the first preset temperature threshold to 100℃ can start cooling and fire extinguishing in time in the case of abnormal temperature rise of the battery, improving the opening speed of the cooling and fire extinguishing device.

[0114] The size of the second preset temperature threshold is not unique, and may be different for different types of battery cells in actual scenarios. For example, in a more detailed embodiment, the second preset temperature threshold can be set to 50-140°C, i.e., 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 cells in the adjacent site needs to be greater than or equal to 140°C before the battery cells in the current site are considered to have a thermal runaway anomaly, so that the opening of the cooling and fire extinguishing device is necessarily performed in the case of thermal runaway of the battery cells, thereby improving the opening accuracy of the cooling and fire extinguishing device. Setting the second preset temperature threshold to 50°C can timely open the cooling and fire extinguishing device in the case of abnormal temperature rise of the battery cells in the adjacent site, thereby improving the opening speed of the cooling and fire extinguishing device.

[0115] The above scheme, in the case of positioning to the thermal runaway site and stopping the operation of the fire-retardant fire extinguishing device, also needs to satisfy that the gas detection alarm duration is greater than or equal to a preset time length, the battery 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 battery cell temperature of at least a first preset number of battery cells is greater than or equal to a first preset temperature threshold, and the battery cell temperature of at least a second preset number of battery 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 conditions, and then control the cooling and fire extinguishing device to open to deliver the cooling medium, which can effectively improve the opening accuracy of the cooling and fire extinguishing device.

[0116] In some embodiments, controlling the cooling and fire extinguishing device to operate to provide the cooling medium and / or the fire extinguishing medium to the thermal runaway site further includes: in the case that the thermal runaway phenomenon of the thermal runaway site is not inhibited, controlling the cooling and fire extinguishing device to operate to provide the fire extinguishing medium to the thermal runaway site.

[0117] Specifically, the thermal runaway phenomenon is inhibited, i.e., the thermal runaway site is cooled to a normal state by the fire extinguishing device of the previous stage (which can be the fire-retardant fire extinguishing device or the cooling medium of the cooling and fire extinguishing device). If the thermal runaway phenomenon is inhibited, there is no need to open 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 operating, and wait for the staff to perform maintenance. If the thermal runaway phenomenon is not inhibited, the cooling and fire extinguishing device needs to be further controlled to open to deliver the fire extinguishing medium, thereby reducing the possibility of fire.

[0118] It should be noted that controlling the cooling and fire extinguishing device to open to deliver the fire extinguishing medium can be performed in the case that the fire-retardant fire extinguishing device cannot effectively inhibit the thermal runaway phenomenon after being controlled to operate. Correspondingly, at this time, the energy storage system is configured with two stages of fire extinguishing, i.e., the first stage: the fire-retardant fire extinguishing device, and the second stage: the fire extinguishing medium of the cooling and fire extinguishing device.

[0119] In another embodiment, the control of the cooling fire extinguishing device to start delivering the fire extinguishing medium can also be performed in the case that the heat runaway phenomenon cannot be effectively suppressed after the control of the cooling fire extinguishing device to start delivering the cooling medium. Correspondingly, the energy storage system in this case is provided with three levels of fire protection, i.e., the first level is the fire retardant fire extinguishing device, the second level is the cooling medium of the cooling fire extinguishing device, and the third level is the fire extinguishing medium of the cooling fire extinguishing device.

[0120] The above scheme can further deliver the fire extinguishing medium by the cooling fire extinguishing device of the energy storage system, and in the case that the heat runaway phenomenon cannot be effectively suppressed by the cooling medium and / or the fire retardant fire extinguishing device, the cooling fire extinguishing device can be started to deliver the fire extinguishing medium, thereby further improving the operation safety of the energy storage system.

[0121] In some embodiments, in the case of heat runaway, the method further comprises: controlling the cooling fire extinguishing device to operate to provide cooling medium to the energy storage system.

[0122] Specifically, the scheme of the present embodiment can further realize the spraying of the cooling medium by the cooling fire extinguishing device, thereby realizing the overall cooling of the energy storage system. It should be noted that the spraying function of the cooling fire extinguishing device can be started immediately after detecting the occurrence of heat runaway, i.e., the energy storage system in this case is provided with two levels of fire protection, the first level is the fire retardant fire extinguishing device to provide fire retardant medium for the sealed assembly, and the second level is the cooling fire extinguishing device to provide cooling medium for the energy storage system.

[0123] In another embodiment, the spraying function of the cooling fire extinguishing device can also be started after the cooling fire extinguishing device provides the cooling medium and / or the fire extinguishing medium to the heat runaway site. Correspondingly, in the scheme of the present embodiment, after the occurrence of heat runaway and the cooling fire extinguishing device provides the cooling medium and / or the fire extinguishing medium to the heat runaway site, if it is detected that the heat runaway phenomenon is not suppressed, the cooling fire extinguishing device is further controlled to start the spraying function. That is, the energy storage system in this case is provided with three levels of fire protection, the first level is the fire retardant fire extinguishing device to provide fire retardant medium for the sealed assembly, the second level is the cooling fire extinguishing device to provide cooling medium and / or fire extinguishing medium for the heat runaway site, and the third level is the cooling fire extinguishing device to provide cooling medium for the energy storage system.

[0124] The scheme of the embodiment further comprises a spraying device. The spraying device is a device for cooling and extinguishing the energy storage system by spraying cooling medium to the energy storage system. In actual scenarios, if the thermal runaway is suppressed, there is no need to start further fire-fighting, and thus the energy storage control device only needs to control the upper-level fire-fighting device (i.e., the cooling and / or extinguishing medium of the cooling and extinguishing device) to stop running, and waits for the staff to perform maintenance. If the thermal runaway is not suppressed after the cooling and extinguishing device starts to spray the cooling and / or extinguishing medium, the spraying device needs to be further started to provide cooling medium to the energy storage system.

[0125] It can be understood that the specific type of cooling medium is not unique, and any gas, liquid or solid with cooling and extinguishing functions can be used. In a more detailed embodiment, the cooling medium can be water. After the energy storage valve control device controls the spraying device to start running, the spraying device can directly spray cooling medium to the thermal runaway site of the energy storage system, or can spray cooling medium to the entire energy storage system, and the specific spraying method is not limited.

[0126] It should be pointed out that the specific structure of the spraying device is not unique. In an embodiment, the energy storage system with the energy storage valve tower structure is taken as an example for explanation and description. Please refer to Figure 4 , the spraying device comprises a spray head 804, an electric valve 803, a power assembly 801 and a fire-fighting controller 205. The power assembly 801, the electric valve 803 and the spray head 804 are sequentially connected by a water path. The spray head 804 is arranged at the top of the energy storage valve tower. The spray head 804, the electric valve 803 and the power assembly 801 are respectively in communication connection with the fire-fighting controller 205. The fire-fighting controller 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 (e.g., a fire-fighting pool) from the cooling and extinguishing medium source, and the cooling medium can be sprayed out through the spray head 804 at a specific angle and pressure to spray and cool the energy storage valve tower. The fire-fighting controller 205 of the spraying device, the fire-fighting controller of the fire-fighting device and the fire-fighting controller of the cooling and extinguishing device can be shared or separately arranged, and the specific arrangement is not limited herein.

[0127] It can be understood that the number of the electric valve 803 and the spray head 804 in the spraying device is not unique. In an embodiment, the electric valve 803 and the spray head 804 can be respectively arranged for each energy storage valve tower, so as to realize independent spraying and cooling of each energy storage valve tower.

[0128] The above scheme can further provide cooling medium to the energy storage system by controlling the cooling and extinguishing device in the case of thermal runaway, spray the energy storage system by the cooling medium, realize cooling and extinguishing of the energy storage system, and further improve the fire safety of the energy storage system.

[0129] In some embodiments, the fire control method of the energy storage system comprises: determining that the thermal runaway phenomenon of the thermal runaway site is suppressed in the case that the site temperature of each 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.

[0130] Specifically, 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 suppressed at this time in combination with the obtained cell temperature. Specifically, it can be analyzed separately based on the cell temperature of the thermal runaway site (specifically, the thermal runaway battery cabinet), or it can be analyzed separately based on the cell temperature in the site adjacent to the thermal runaway site, or it can be analyzed and judged in combination with both. Specifically, no limitation is made.

[0131] It should be pointed out that the thermal runaway site is explained and described by taking the thermal runaway battery cabinet as an example. 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 cabinet, or the average temperature of each cell in the adjacent battery cabinet, and the specific limitation is not made. The cell temperature of the thermal runaway site is less than or equal to the preset comparison temperature, which can be the temperature of each cell in the thermal runaway battery cabinet, or the average value of the temperature of each cell in the thermal runaway battery cabinet, and the specific selection can be made according to the actual demand.

[0132] 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 a more detailed embodiment, the preset comparison temperature can be set to 100℃. Among them, 100℃ represents the lowest temperature value that the cell can reach in the thermal runaway state of the cell, and the cell temperature below 100℃ indicates that the thermal runaway of the cell is suppressed. In this way, by setting the preset comparison temperature to 100℃, the case that the thermal runaway of the cell is suppressed can be detected in time.

[0133] The above scheme can judge whether the thermal runaway is suppressed by comparing the site temperature of the site adjacent to the thermal runaway site, or by comparing the cell temperature in the thermal runaway site, which has high judgment accuracy.

[0134] In some embodiments, the control of the operation of the cooling and fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site comprises: in the case that the thermal runaway site is located and the observation confirmation instruction is received, the operation of the cooling and fire extinguishing device is controlled to provide the fire extinguishing medium to the thermal runaway site.

[0135] Specifically, the observation confirmation instruction is a determination signal confirming that the thermal runaway occurs in the energy storage system, which is fed back to the energy storage control device by the worker after observing the thermal runaway of the energy storage system. In the case where the thermal runaway phenomenon is not inhibited, the energy storage control device can also locate the cell that has the thermal runaway at this time according to the cell temperature of each cell, and determine the electric box, the battery cabinet and the energy storage tower where the thermal runaway occurs at this time according to the location of the cell. After locating the thermal runaway site and receiving the observation confirmation instruction, the energy storage control device controls the cooling and fire extinguishing device of the energy storage system to deliver the fire extinguishing medium.

[0136] The above scheme needs to open the cooling and fire extinguishing device to deliver the fire extinguishing medium after locating the thermal runaway site and receiving the observation confirmation instruction sent by the worker after observation, 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.

[0137] It should be pointed out that, in some embodiments, similar to the above control of 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 where the thermal runaway phenomenon at the thermal runaway site is not inhibited and after locating the thermal runaway site and receiving the observation confirmation instruction, controlling the operation of the cooling and fire extinguishing device to provide the cooling medium to the energy storage system.

[0138] In some embodiments, the control of the operation of the cooling and fire extinguishing device to provide the fire extinguishing medium to the thermal runaway site after locating the thermal runaway site and receiving the observation confirmation instruction includes: in the case where the thermal runaway site is located and the observation confirmation instruction is 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.

[0139] Specifically, the fire extinguishing start condition is a condition required for the delivery of the fire extinguishing medium of the cooling and fire extinguishing device. In the scheme of this embodiment, the cooling and fire extinguishing device opens the delivery of the fire extinguishing medium, which needs to meet the fire extinguishing start condition in addition to locating the thermal runaway site and receiving the observation confirmation instruction sent by the worker, otherwise it will not be opened.

[0140] The above scheme needs to meet the fire extinguishing start condition in the case where the thermal runaway site is located and the observation confirmation instruction sent by the worker after observation is received, and then controls 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.

[0141] In some embodiments, the fire extinguishing start condition includes at least one of the following items:

[0142] The first item: determining that a fire occurs according to the fire signal collected by the fire detector.

[0143] 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.

[0144] The third item: the energy storage system is in energy storage outage.

[0145] Specifically, the energy storage outage means that the energy storage system stops charging and discharging. The cooling and fire extinguishing device of the embodiment further comprises a fire detector, which is arranged in the energy storage valve hall (taking a valve tower structure as an example) of the energy storage system. The fire detector can detect whether a fire occurs in the energy storage valve hall where the energy storage valve tower is located. It should be pointed out that the specific type of the fire detector is not unique. In an embodiment, it can be at least one of an infrared sensor, a smoke sensor and a flame detector.

[0146] 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 the thermal runaway occurs) and receives the observation confirmation instruction, the energy storage control device does not directly control the cooling and fire extinguishing device to start delivering the fire extinguishing medium, but needs to meet another condition before starting operation.

[0147] Specifically, at least one of the following three conditions can be met. The first condition: the energy storage control device determines that a fire occurs according to the fire signal collected by the fire detector. The second condition: the cell voltage of at least a third preset number of cells in the thermal runaway site (specifically, the thermal runaway cell) 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 condition: the energy storage system is in energy storage outage.

[0148] 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 cells in the site in the actual scene. For example, in a more detailed embodiment, 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 delivering the fire extinguishing medium when a small number of cells abnormally, thereby improving the opening speed of the cooling and fire extinguishing device. The maximum value of the third preset number is set to 52, which can start delivering the fire extinguishing medium when a large number of cells abnormally, so that the opening of the cooling and fire extinguishing device is necessarily performed in the case of thermal runaway, thereby improving the opening accuracy of the cooling and fire extinguishing device.

[0149] The size of the second preset voltage threshold is not unique, and will be different according to the type of the battery in the actual scene. For example, in a more detailed embodiment, the second preset voltage threshold can be set to 0V-5V, that is, 5V, or any value between 0V-5V. By setting the second preset voltage threshold to 0V, the battery voltage needs to be reduced to 0V before the battery is considered to have a thermal runaway anomaly, so that the delivery of the fire extinguishing medium must be carried out in the case of thermal runaway of the battery, thereby improving the opening accuracy of the cooling and fire extinguishing device. By setting the second preset voltage threshold to 5V, the battery voltage threshold is reduced to less than or equal to 5V, which is considered to be a thermal runaway anomaly of the battery, thereby improving the opening speed of the cooling and fire extinguishing device.

[0150] The size of the third preset temperature threshold is not unique, and will be different according to the type of the battery in the actual scene. For example, in a more detailed embodiment, the third preset temperature threshold is set to be the same as the first preset temperature threshold, which can be set to 100℃-700℃, that is, 100℃, 700℃, or any value between 100℃-700℃. By setting the third preset temperature threshold to 700V, the battery temperature needs to be raised to greater than or equal to 700℃ before the battery is considered to have a thermal runaway anomaly, so that the delivery of the fire extinguishing medium must be carried out in the case of thermal runaway of the battery, thereby improving the opening accuracy of the cooling and fire extinguishing device. By setting the third preset temperature threshold to 100℃, the cooling and fire extinguishing device can be turned on in time to deliver the fire extinguishing medium in the case of abnormal temperature rise of the battery, thereby improving the opening speed of the cooling and fire extinguishing device.

[0151] The above scheme, in the case of locating the thermal runaway site and receiving the observation confirmation instruction sent by the personnel observation, further needs to satisfy at least one of the following conditions: determining that a fire occurs according to the fire signal, the battery voltage of at least a third preset number of batteries in the thermal runaway site is less than or equal to the second preset voltage threshold and the battery temperature is greater than or equal to the third preset temperature threshold, and the energy storage system is shut down, and then 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.

[0152] It should be pointed out that in some embodiments, in the case of locating the thermal runaway site and receiving the observation confirmation instruction, controlling the cooling and fire extinguishing device to operate to provide cooling medium to the energy storage system 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 satisfied, controlling the cooling and fire extinguishing device to operate to provide cooling medium to the energy storage system.

[0153] Specifically, 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 cooling medium or fire extinguishing medium to cool and extinguish the fire, if the thermal runaway phenomenon of the thermal runaway site is not inhibited, the cooling medium is sprayed to the energy storage system in the manner of this embodiment, and the fire extinguishing starting condition is as shown in the above embodiment, which will not be described here.

[0154] In some embodiments, the method further comprises: in the case where the fire is inhibited, controlling the cooling and fire extinguishing device to stop running.

[0155] Specifically, the fire is inhibited, i.e., the fire of the energy storage system is eliminated, and there is no possibility of further expansion. The specific detection method is not unique. In an embodiment, the fire signal detected by the fire detector can be analyzed and judged. Therefore, in the case where the energy storage control device detects that the fire is inhibited, any one of the cooling medium and / or fire extinguishing medium delivery function of the cooling and fire extinguishing device or the cooling medium spraying function of the cooling and fire extinguishing device can be stopped running, or both the cooling medium and / or fire extinguishing medium delivery function and the cooling medium spraying function of the cooling and fire extinguishing device are controlled to stop running, which can be determined in combination with the actual scene, and is not limited here.

[0156] The above scheme can stop the cooling and fire extinguishing device from running in the case where the fire is inhibited by opening the spraying function, and wait for the staff to repair, which can effectively reduce the waste of fire fighting resources.

[0157] In some embodiments, in the case where thermal runaway occurs, the method further comprises: controlling the fire-retardant fire extinguishing device to displace and run, so as to squeeze and discharge the thermal runaway gas at the thermal runaway site to the outside of the energy storage system by the fire-retardant medium.

[0158] Specifically, the fire-retardant fire extinguishing device has a displacement mode running function. In this mode, the fire-retardant medium is transmitted to the sealed assembly, which can squeeze 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, the gas can be squeezed and discharged to the outside of the energy storage valve hall at this time.

[0159] In the case where thermal runaway does not occur, the fire-retardant fire extinguishing device runs to provide the fire-retardant medium to the sealed assembly. Specifically, the fire-retardant medium can be circulated or immersed, or the sealed assembly can be in a vacuum state, so that the sealed assembly is in a combustion inhibition state. If thermal runaway occurs, the fire-retardant fire extinguishing device will first switch to the displacement mode running to deliver the fire-retardant medium to the thermal runaway site to squeeze and discharge the thermal runaway gas to the outside of the energy storage system, so as to maintain the sealed assembly in a combustion inhibition state.

[0160] In the above scheme, in the event of thermal runaway, the flame retardant fire-fighting device can also be switched to replacement operation. By delivering a flame retardant medium to the thermal runaway site, the thermal runaway gas is squeezed and discharged to the outside of the energy storage system, thereby providing an oxygen-free and combustion-free environment for the thermal runaway site, reducing the possibility of fire in the battery cell at the thermal runaway site due to thermal runaway.

[0161] In some embodiments, in the event 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 event of thermal runaway and the thermal runaway is not resolved 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.

[0162] Specifically, thermal runaway resolution refers to the removal of the thermal runaway alarm at the thermal runaway location. This can be the removal of either the thermal runaway alarm at the location or the removal of the gas detection alarm at the location. If the thermal runaway at the location is not resolved within a preset time, the subsequent firefighting devices (also known as cooling and fire extinguishing devices) will be activated to cool down and extinguish the fire, thereby quickly alleviating the thermal runaway phenomenon and reducing the possibility of its spread.

[0163] The above scheme activates the cooling and fire extinguishing device when thermal runaway occurs and the thermal runaway is not resolved within a preset time period, thereby improving the activation accuracy of the cooling and fire extinguishing device.

[0164] In some embodiments, the fire control method for the energy storage system further includes: upon receiving a thermal runaway alarm signal and / or a gas detection alarm signal, determining that thermal runaway has occurred.

[0165] Specifically, there is not only one way to verify whether the energy storage system has thermal runaway. It can be obtained by analyzing the cell temperature of each battery cell in the battery cabinet's electrical box, or by analyzing the concentration parameters of the combustible gas in the sealing component.

[0166] In more detail, in one embodiment, a thermal runaway alarm signal is generated based on the cell temperature of each battery box in the battery cabinet of the energy storage system, and a gas detection alarm signal is generated based on the combustible gas concentration parameter in the gas circuit (connected to the sealing component) of the flame retardant fire-fighting device.

[0167] Specifically, the energy storage system includes a plurality of connected energy storage submodules (which can be connected in parallel or other ways according to actual needs, which is not limited here), each energy storage submodule is supported by an insulator 301 to form an energy storage valve tower (in other embodiments, a container-type structure can also be used, which is not limited here). For details, please refer to Figure 5The same energy storage system includes at least one energy storage valve tower, and each energy storage valve tower is arranged in the energy storage valve hall, and each energy storage sub-module includes a plurality of battery cabinets connected in series (which can be connected in parallel or other ways according to actual needs, which is not limited here), which can be combined with reference to Figure 6 The inside of each battery cabinet includes a plurality of electric boxes, and each electric box includes a plurality of electric cores connected in series and / or parallel.

[0168] Therefore, when the energy storage system is in thermal runaway, the temperature of the electric core at the location of the thermal runaway will inevitably rise. Therefore, in the scheme of the embodiment, the energy storage control device is in communication with the battery management system (BMS), and the temperature of each electric core is obtained in real time during the operation of the energy storage system, and compared with the preset thermal runaway temperature threshold. In the case where the temperature of any one electric core is greater than or equal to the thermal runaway threshold, it is considered that the energy storage system has occurred thermal runaway, and a thermal runaway alarm signal will be generated at this time to output a prompt information to remind the user.

[0169] As shown in the above embodiment, a thermal runaway detection assembly is arranged between the sealing assembly and the circulating assembly of the fire extinguishing device, which can detect the concentration of combustible gas in the gas transmitted in the gas path in real time, and obtain the combustible gas concentration parameter. In the case where the combustible gas concentration parameter is greater than or equal to the preset concentration threshold, it is considered that the sealing assembly has occurred thermal runaway at this time, and a gas detection alarm signal will be generated at this time to output a prompt information to remind the user.

[0170] It should be pointed out that the comparison operation of the combustible gas concentration parameter can be performed in the energy storage control device or in the fire control controller of the fire extinguishing device, which is not limited. The specific type of the thermal runaway detection assembly is not unique, as long as it can detect various combustible gases generated by battery thermal runaway, for example, in a more detailed embodiment, at least one of a methane detector, a carbon monoxide detector, and a hydrogen detector.

[0171] In actual scenarios, the energy storage control device can use any one of the electric core temperature analysis and the combustible gas concentration parameter analysis, or a combination of the two, to determine whether the energy storage system has occurred thermal runaway, which is not limited.

[0172] It can be understood that in the scheme of the above embodiment, the fire extinguishing device can transmit combustion inhibition gas to each sealing assembly at the same time, 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 in the sealed cabin, and also change the internal environment of the remaining sealing assemblies to reduce the possibility of thermal runaway spreading to other sealing assemblies.

[0173] In another embodiment, the gas supply to each sealed assembly can also be controlled individually by the gas protection device, in the event of thermal runaway, only the thermal runaway sealed assembly is replaced by gas, and the sealed assembly without thermal runaway continues to be replaced without replacement, which can be set according to actual needs.

[0174] The above scheme can determine whether thermal runaway occurs through a thermal runaway alarm signal, and can also determine whether thermal runaway occurs through a gas detection alarm signal, which has high accuracy in determining thermal runaway.

[0175] In some embodiments, the operation of the fire-retardant fire extinguishing device is controlled to provide fire-retardant medium to the sealed assembly, including at least one of the following:

[0176] The first item is to control the operation of the fire-retardant fire extinguishing device to provide fire-retardant medium to the battery cabinet of the energy storage system.

[0177] The second item is to control the operation of the fire-retardant fire extinguishing device to provide fire-retardant medium to the electrical box of the energy storage system.

[0178] The third item is to control the operation of the fire-retardant fire extinguishing device to provide fire-retardant medium to the container of the energy storage system.

[0179] Specifically, according to different actual use scenarios, the sealed assembly can be one or more of an electrical box, a battery cabinet, and a container, thereby providing a combustion inhibition environment for different energy storage levels.

[0180] The above scheme, the sealed assembly can be one or more of a battery cabinet, an electrical box, and a container according to the type of the energy storage system, and the fire-retardant 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 of the battery cabinet, the electrical box, or the container due to thermal runaway.

[0181] In some embodiments, the operation of the fire-retardant fire extinguishing device is controlled to provide fire-retardant medium to the sealed assembly, including any one of the following: the first item is to control the fire-retardant fire extinguishing device to drive gas fire-retardant medium and / or liquid fire-retardant medium to circulate in the fire-retardant fire extinguishing device and the sealed assembly; the second item is to control the operation of the fire-retardant fire extinguishing device to provide gas fire-retardant medium and / or liquid fire-retardant medium to immerse the inside of the sealed assembly; and the third item is to control the fire-retardant fire extinguishing device to operate in a vacuum state to form a vacuum environment in the inside of the sealed assembly.

[0182] In the above scheme, the flame-retardant fire-fighting device can provide the sealing assembly with a flame-retardant medium by circulating a gaseous and / or liquid flame-retardant medium into the sealing assembly, by injecting the gaseous and / or liquid flame-retardant medium into the sealing assembly to completely submerge the entire cabin space, or by operating the flame-retardant fire-fighting device to create a vacuum environment within the sealing assembly. This provides a stable and reliable combustion-suppressing environment for the sealing assembly, significantly reducing the possibility of combustion after thermal runaway.

[0183] In order to facilitate understanding of the technical solution of the present application, the present application will be explained below using a valve tower structure energy storage system as an example in combination with more detailed embodiments.

[0184] (1) The flame retardant fire-fighting device includes a gas protection device: the operating mode is switched according to ① the thermal runaway alarm signal or ② the gas detection alarm signal. ① and ② are OR logic. If one condition is met, the mode is switched from the circulation mode to the replacement mode, and the combustible gas generated by the thermal runaway of the battery cell is suppressed from burning and discharged outside the energy storage valve hall; otherwise, the operation of the energy storage system is maintained in the circulation mode, that is, the flame retardant medium is driven to circulate between the gas protection device and the sealing component.

[0185] (2) The cooling and fire extinguishing device includes providing cooling medium and / or fire extinguishing medium to the thermal runaway site. After thermal runaway occurs and the gas protection device starts the replacement operation, the cooling and fire extinguishing device judges the degree of thermal diffusion of the battery cell through the energy storage control device and then issues a command to start. The judgment criteria are: ① The duration of the gas detection alarm is ≥Dmin, ② At least E battery cells in the thermal runaway site (taking the battery box as an example) have a voltage ≤AV and a temperature ≥B℃, ③ At least F battery cells in the adjacent battery box in the battery cabinet where the thermal runaway battery box is located have a temperature ≥C℃, ④ The energy storage control device obtains the location of the thermal runaway energy storage valve tower, and ⑤ The gas protection device stops operating. Among them, ④⑤ are necessary conditions and must be met, while ①②③ only need to meet at least one of them. At this time, the cooling and fire extinguishing device is started, and the cooling medium and / or fire extinguishing medium is sprayed into each battery cabinet of the thermal runaway energy storage valve tower in a directional manner to achieve effective cooling of the thermal runaway battery cabinet and block heat diffusion between the battery box / battery cabinet.

[0186] Among them, D is the preset time length, which can be in the range of 0-300 minutes; A is the first preset voltage threshold, such as the range of 0-5V; B is the first preset temperature threshold, such as the range of 100℃-700℃; C is the second preset temperature threshold, such as the range of 50℃-140℃; E is the first preset number, such as the range of 3-52; F is the second preset number, such as the range of 3-52.

[0187] (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 an operator according to a comprehensive judgment. The judgment mainly includes: ① determining that a fire occurs according to a fire signal collected by a fire detector, ② at least E1 cells in the thermal runaway battery cabinet where the thermal runaway cell is located have a voltage ≤ A1V and a temperature ≥ B1℃, ③ the energy storage valve tower is shut down, ④ the energy storage control device obtains the positioning of the thermal runaway energy storage valve tower, and ⑤ the operator sends an observation confirmation instruction. Among them, ④ and ⑤ are necessary conditions and must be met, while ① and ② only need to meet at least one. At this time, the spraying function is started to spray the cooling medium (water) to the thermal runaway energy storage valve tower to realize the spraying of the cooling medium to 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.

[0188] Among them, 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.

[0189] It should be understood that although each step in the flowchart involved in each embodiment as described above is displayed in sequence according to the arrow, these steps are not necessarily executed in the order indicated by the arrow. Unless otherwise specified herein, the execution of these steps is not strictly limited in sequence, and these steps can be executed in other orders. Moreover, at least part of the steps in the flowchart involved in each embodiment as described above can include multiple steps or stages, which are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be alternately or alternately executed with at least part of other steps or steps or stages in other steps.

[0190] Based on the same inventive 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, which will not be repeated here.

[0191] Please refer to Figure 7 A fire control device of an energy storage system, comprising: a fire control module 802, a thermal runaway analysis module 804, and a post-stage fire control module 806.

[0192] The fire-retardant control module 802 is configured to control the fire-retardant firefighting device to operate to provide fire-retardant medium to the sealing assembly; the thermal runaway analysis module 804 is configured to detect a thermal runaway state of the energy storage system; and the post-firefighting control module 806 is configured to control the cooling and fire-extinguishing device to operate to provide cooling medium and / or fire-extinguishing medium to the thermal runaway site in the case of thermal runaway.

[0193] In some embodiments, the post-firefighting control module 806 is further configured to control the cooling and fire-extinguishing device to operate to provide cooling medium to the thermal runaway site in the case of locating the thermal runaway site and the fire-retardant firefighting device stopping operating.

[0194] In some embodiments, the post-firefighting 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.

[0195] In some embodiments, the post-firefighting control module 806 is further configured to control the cooling and fire-extinguishing device to operate to provide cooling medium to the thermal runaway site in the case of locating the thermal runaway site and the fire-retardant firefighting device stopping operating, if the cooling start condition is met.

[0196] In some embodiments, the post-firefighting control module 806 is further configured to control the cooling and fire-extinguishing device to operate to provide fire-extinguishing medium to the thermal runaway site in the case of the thermal runaway phenomenon at the thermal runaway site not being inhibited.

[0197] In some embodiments, the post-firefighting control module 806 is further configured to control the cooling and fire-extinguishing device to operate to provide cooling medium to the energy storage system.

[0198] In some embodiments, the post-firefighting control module 806 is further configured to control the cooling and fire-extinguishing device to operate to provide fire-extinguishing medium to the thermal runaway site in the case of locating the thermal runaway site and receiving the observation confirmation instruction.

[0199] In some embodiments, the post-firefighting control module 806 is further configured to control the cooling and fire-extinguishing device to operate to provide fire-extinguishing medium to the thermal runaway site in the case of locating the thermal runaway site and receiving the observation confirmation instruction, if the fire-extinguishing start condition is met.

[0200] Please refer to Figure 8 In some embodiments, in the case of thermal runaway, the device further comprises a displacement control module 902. The displacement control module 902 is configured to control the fire-retardant firefighting device to displace operating to discharge the thermal runaway gas at the thermal runaway site to the outside of the energy storage system by the fire-retardant medium.

[0201] In some embodiments, the post-stage fire control module 806 is further configured to control the cooling and fire extinguishing device to operate to provide cooling and / or fire extinguishing medium to the thermal runaway site in the event of thermal runaway and the thermal runaway is not resolved within the preset time period.

[0202] Each of the modules of the fire control device described above can be implemented wholly or partially by software, hardware and combinations thereof. Each of the modules described above can be embedded in the processor in the computer device in hardware form or independent of the processor in the computer device, or stored in the memory in the computer device in software form to be invoked by the processor to perform the operations corresponding to each of the modules.

[0203] The fire control device described above, under normal circumstances, can control the fire-retardant fire control device to maintain operation, thereby providing 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 event 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 to provide cooling medium and / or fire extinguishing medium to the thermal runaway site by the cooling and fire extinguishing device, 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 under the condition that the energy storage system does not occur thermal runaway, and in the event of thermal runaway, the thermal runaway site is cooled and extinguished by the cooling medium and / or fire extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0204] In some embodiments, a computer device is provided, which can be a terminal, and the internal structure diagram thereof can be as shown in Figure 9 The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. 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. The processor of the computer device is configured to provide computing and control capabilities. 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 configured to exchange information between the processor and external devices. The communication interface of the computer device is configured to communicate with external terminals in a wired or wireless manner. The wireless manner can be achieved by 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 for an energy storage system.

[0205] Those skilled in the art can understand that, Figure 9The structure shown in the figure 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. The specific computer device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0206] In some embodiments, a computer device is provided, comprising a memory and a processor, the memory storing a computer program, and the processor implementing the following steps when executing the computer program:

[0207] controlling the operation of the fire extinguishing device to provide the fire extinguishing medium to the sealing assembly; and 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 in the case of thermal runaway.

[0208] In one embodiment, a computer readable storage medium is provided, having stored thereon a computer program, the computer program being executed by a processor to implement the following steps:

[0209] controlling the operation of the fire extinguishing device to provide the fire extinguishing medium to the sealing assembly; and 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 in the case of thermal runaway.

[0210] In one embodiment, a computer program product is provided, comprising a computer program, the computer program being executed by a processor to implement the following steps:

[0211] controlling the operation of the fire extinguishing device to provide the fire extinguishing medium to the sealing assembly; and 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 in the case of thermal runaway.

[0212] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer readable storage medium, and when executed, can include the processes of the above-mentioned embodiments. 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 random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access 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 blockchain, 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.

[0213] The above computer device, computer readable storage medium and computer program product can generally control the fire-retardant fire extinguishing device to maintain operation, thereby providing a 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 extinguishing 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 cooling medium and / or 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 to reduce 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 fire extinguishing medium, thereby greatly improving the fire safety of the energy storage system.

[0214] The application also provides an energy storage system, comprising a fire-retardant fire-fighting device, a cooling fire-fighting device and an energy storage control device, the fire-retardant fire-fighting device and the cooling fire-fighting 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.

[0215] Specifically, the operating principles of the fire-retardant fire-fighting device, the cooling fire-fighting device and the energy storage control device are as shown in the above embodiments and the accompanying drawings, and will not be described here again.

[0216] In general, the energy storage system can control the fire-retardant fire-fighting device to maintain operation, 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, i.e. thermal runaway of the energy storage system, the cooling fire-fighting device is controlled to operate, and the cooling fire-fighting device provides a cooling medium and / or a fire extinguishing medium to the thermal runaway site, so as to cool and extinguish 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.

[0217] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the specification of the application. In particular, each technical feature mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The 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, characterized in that: include: 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that 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 5, characterized in that 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: 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, characterized in that 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, characterized in that 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, characterized in that 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, characterized in that In the event of thermal runaway, the method further includes: controlling the flame retardant fire-fighting device to perform 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, characterized in that 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, characterized in that include: 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, characterized in that: 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, characterized in that 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, characterized in that: include: 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, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 16 are implemented.

19. A computer-readable storage medium having a computer program stored thereon, characterized in that: 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, characterized in that 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.

21. An energy storage system, characterized in that: It comprises 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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