Fire extinguishing device for energy storage system, energy storage system and fire extinguishing control method

Abstract

Provided are a fire extinguishing device for an energy storage system, an energy storage system, and a fire extinguishing control method. The fire extinguishing device for the energy storage system comprises a first fire extinguishing medium storage part, a second fire extinguishing medium storage part, a control module, at least one ejection assembly, and at least one sensing module. The ejection assembly is arranged in an energy storage tank of the energy storage system and is used to communicate with the first fire extinguishing medium storage part or the second fire extinguishing medium storage part. The sensing module is arranged in the energy storage tank and is used to detect an environmental parameter in the energy storage tank. The control module is connected with the sensing module and is used to control the ejection assembly to communicate with the first fire extinguishing medium storage part or the second fire extinguishing medium storage part according to the environmental parameter detected by the sensing module, so that the fire extinguishing medium is ejected into the energy storage tank. The above scheme can adopt a gas-water linkage fire extinguishing mode, can extinguish an initial fire, and can extinguish the fire again when the fire recovers, can effectively inhibit the spread of lithium ion battery thermal runaway, and can improve the reliability of extinguishing the energy storage system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy, in particular to a fire extinguishing device for an energy storage system, an energy storage system and a fire extinguishing control method. BACKGROUND

[0002] Lithium ion batteries are the first choice for power storage systems due to their superior performance and mature technology, and have many applications in grid energy storage, commercial energy storage, user-side energy storage and other fields. However, during use, lithium ion batteries may cause internal reactions due to overcharging, overdischarging, overheating, internal short-circuit, external short-circuit, or abuse such as squeezing and collision. The reaction heat that is not removed in time will accumulate in the battery and cause thermal runaway and even thermal runaway diffusion, which may further cause fire and explosion accidents. Since power storage systems are usually large in scale and high in energy density, once a thermal runaway fire occurs, it is usually uncontrollable, burns fiercely and lasts for a long time, posing a great threat to the safety of people and property around.

[0003] Traditional lithium ion energy storage systems usually use gas fire extinguishing technology. This scheme can effectively extinguish the initial fire of lithium ion batteries, but cannot suppress the thermal runaway of lithium ion batteries. When the fire extinguishing gas spreads below the extinguishing concentration, it is easy to cause rekindling, and the reliability of fire extinguishing is low. SUMMARY

[0004] The present application provides a fire extinguishing device for an energy storage system, an energy storage system and a fire extinguishing control method to improve the reliability of fire extinguishing for lithium ion energy storage systems.

[0005] In a first aspect, the application provides a fire extinguishing device for an energy storage system, which can include a first fire extinguishing medium storage, a second fire extinguishing medium storage, a control module, at least one spray assembly, and at least one sensing module. The first fire extinguishing medium storage stores a first fire extinguishing medium, and the second fire extinguishing medium storage stores a second fire extinguishing medium. The second fire extinguishing medium has a stronger fire extinguishing capability than the first fire extinguishing medium. For example, the first fire extinguishing medium storage can store a gaseous fire extinguishing medium, and the second fire extinguishing medium storage can store a liquid fire extinguishing medium. The at least one spray assembly can be arranged in at least one energy storage tank of the energy storage system and configured to communicate with the first fire extinguishing medium storage or the second fire extinguishing medium storage. The at least one sensing module can be arranged in the at least one energy storage tank and configured to detect an environmental parameter in the at least one energy storage tank. The control module is connected to the at least one sensing module and configured to: when the environmental parameter detected by the at least one sensing module meets a first condition, control the at least one spray assembly to communicate with the first fire extinguishing medium storage so that the first fire extinguishing medium is sprayed into the at least one energy storage tank; and when the environmental parameter detected by the at least one sensing module meets a second condition, control the at least one spray assembly to communicate with the second fire extinguishing medium storage so that the second fire extinguishing medium is sprayed into the at least one energy storage tank. The environmental parameter meeting the first condition indicates that an initial fire occurs in the at least one energy storage tank. The environmental parameter meeting the second condition indicates that the initial fire in the at least one energy storage tank reignites.

[0006] In the technical solution provided by the application, the control module can determine the environmental condition in the energy storage tank according to the environmental parameter detected by the sensing module. For example, when the environmental parameter indicates that the lithium ion battery in the energy storage tank has an initial fire due to thermal runaway, the control module can control the spray assembly to communicate with the first fire extinguishing medium storage to spray the first fire extinguishing medium into the energy storage tank, thereby extinguishing the fire and effectively inhibiting the spread of thermal runaway among the battery modules. When the environmental parameter indicates that the lithium ion battery reignites, i.e., the initial fire in the energy storage tank reignites, the control module can control the spray assembly to communicate with the second fire extinguishing medium storage to spray the second fire extinguishing medium into the energy storage tank, thereby extinguishing the fire again and cooling the lithium ion battery, which can inhibit the lithium ion battery from reigniting and inhibit the spread of thermal runaway of the lithium ion battery. The fire extinguishing device for an energy storage system provided by the embodiments of the application can use a gas-water combined fire extinguishing method to extinguish the initial fire and then extinguish the fire again when it reignites, which can improve the reliability of extinguishing the fire of the energy storage system, effectively inhibit the spread of thermal runaway of the lithium ion battery, and avoid causing uncontrollable fires.

[0007] In a specific implementation, each spray assembly can include a plurality of delivery pipelines and a plurality of spray heads. The plurality of delivery pipelines are arranged in an array, and the plurality of spray heads are connected to the plurality of delivery pipelines. The fire extinguishing medium can be sprayed into the energy storage tank.

[0008] In one specific implementation, at least one spray assembly is configured to communicate with the first fire extinguishing medium storage or the second fire extinguishing medium storage through a pipeline assembly. The pipeline assembly can include a main pipeline assembly and at least one branch pipeline assembly; the first end of the main pipeline assembly is configured to be connected to the first fire extinguishing medium storage and the second fire extinguishing medium storage, respectively; the first end of the at least one branch pipeline assembly is connected to the second end of the main pipeline assembly, respectively, and the second end of the at least one branch pipeline assembly is connected to the at least one spray assembly one by one. The connection between the spray assembly and the first fire extinguishing medium storage and the second fire extinguishing medium storage can be achieved.

[0009] In one specific implementation, the main pipeline assembly can include a first main pipeline and a first pump group. The first pump group is arranged on the first main pipeline, the first end of the first main pipeline is configured to be connected to the first fire extinguishing medium storage and the second fire extinguishing medium storage, respectively, and the first end of the at least one branch pipeline assembly is connected to the second end of the first main pipeline one by one. The control module is further connected to the first pump group, and the control module is further configured to control the first pump group to spray the fire extinguishing medium stored in the fire extinguishing medium storage communicated with the at least one spray assembly into the at least one energy storage tank. The first fire extinguishing medium or the second fire extinguishing medium flowing through the first main pipeline can be pressurized to reach the design required pressure and flow.

[0010] In one specific implementation, the main pipeline assembly can further include a second main pipeline, a second pump group and a second main control valve. The second pump group and the second main control valve are arranged on the second main pipeline; the second main pipeline provided with the second pump group and the second main control valve is connected in parallel to the first main pipeline provided with the first pump group. The control module is further connected to the second main control valve and the second pump group, and the control module is further configured to control the second main control valve to be closed when the first pump group is in normal operation, and to be opened to conduct the second main pipeline and control the second pump group to spray the fire extinguishing medium stored in the fire extinguishing medium storage communicated with the at least one spray assembly into the at least one energy storage tank when the first pump group is in failure. The second pump group can serve as a backup pump group. After the first pump group is started, if the pressure and flow data of the fire extinguishing medium fail to reach the design requirements, the first pump group failure can be reported, the control module can open the second main control valve to start the second pump group, thereby improving the operation reliability of the device.

[0011] In one specific implementation, each branch pipeline assembly can include a branch pipeline and a branch control valve. The branch control valve is arranged on the branch pipeline, the first end of the branch pipeline is connected to the second end of the main pipeline assembly, and the second end of the branch pipeline is connected to the spray assembly. The control module is further connected to the branch control valve, and the control module is further configured to control the branch control valve to be opened or closed to control the on-off of the branch pipeline.

[0012] In one specific implementation, the first end of the main line pipe assembly is configured to be connected to the first fire extinguishing medium storage through a first pipe assembly, and to be connected to the second fire extinguishing medium storage through a second pipe assembly. The first pipe assembly can include a first pipe and a first control valve arranged on the first pipe, a first end of the first pipe being configured to be connected to the first fire extinguishing medium storage, and a second end of the first pipe being connected to the first end of the main line pipe assembly. The second pipe assembly includes a second pipe and a second control valve arranged on the second pipe, a first end of the second pipe being configured to be connected to the second fire extinguishing medium storage, and a second end of the second pipe being connected to the first end of the main line pipe assembly. The control module is further connected to the first control valve and the second control valve, respectively, and is further configured to control the first control valve to open or close to control the on-off of the first pipe, and to control the second control valve to open or close to control the on-off of the second pipe.

[0013] In one specific implementation, the fire extinguishing device can further include a detection pipe assembly, the detection pipe assembly including a detection pipe and a detection control valve arranged on the detection pipe, a first end of the detection pipe being connected to the pipe assembly, and a second end of the detection pipe being located outside the energy storage tank. The control module is further connected to the detection control valve, and is further configured to control the detection control valve to open or close to control the on-off of the detection pipe. The detection pipe assembly can realize pipe maintenance.

[0014] In one specific implementation, the fire extinguishing device can further include an exhaust portion arranged on the energy storage tank. The control module is further connected to the exhaust portion, and is further configured to control the exhaust portion to exhaust smoke generated inside the energy storage tank to the outside of the energy storage tank. The accumulation of flammable smoke in the energy storage tank can be avoided, and the possibility of fire can be reduced.

[0015] In one specific implementation, the fire extinguishing device can further include an alarm arranged outside the energy storage tank. The control module is further connected to the alarm, and is further configured to control the alarm to alarm when it is detected that there is a risk of fire in the energy storage tank. The manager can be informed of the risk of fire in time so as to handle it and avoid serious consequences.

[0016] In one specific implementation, the fire extinguishing device can further include an emergency stop control portion. The control module is further connected to the emergency stop control portion, and is further configured to control the on-off of at least one spray assembly to the first fire extinguishing medium storage or the second fire extinguishing medium storage when a trigger signal of the emergency stop control portion is received. Human intervention can be realized when a misjudgment occurs, and the reliability of the device operation can be improved.

[0017] In a second aspect, the application provides an energy storage system, which can include at least one energy storage tank and the fire extinguishing device for the energy storage system according to any of the implementation solutions of the first aspect. A plurality of battery modules are arranged in the at least one energy storage tank. At least one spray assembly of the fire extinguishing device is arranged in the at least one energy storage tank, and at least one sensing module is arranged in the at least one energy storage tank.

[0018] In a third aspect, the application provides a fire extinguishing control method, which can be applied to the fire extinguishing device for the energy storage system according to any of the implementation solutions of the first aspect or the energy storage system according to the second aspect. The method can include the following steps:

[0019] The control module acquires the environmental parameter in the at least one energy storage tank detected by the at least one sensing module. When the environmental parameter detected by the at least one sensing module meets a first condition, the control module can control the at least one spray assembly to communicate with the first fire extinguishing medium storage part, so that the first fire extinguishing medium in the first fire extinguishing medium storage part is sprayed into the at least one energy storage tank. The environmental parameter meeting the first condition indicates that an initial fire occurs in the at least one energy storage tank. When the environmental parameter detected by the at least one sensing module meets a second condition, the control module can control the at least one spray assembly to communicate with the second fire extinguishing medium storage part, so that the second fire extinguishing medium in the second fire extinguishing medium storage part is sprayed into the at least one energy storage tank. The environmental parameter meeting the second condition indicates that the initial fire in the at least one energy storage tank is rekindled.

[0020] In a specific implementation solution, the control module can control the at least one spray assembly to communicate with the first fire extinguishing medium storage part, so that the first fire extinguishing medium in the first fire extinguishing medium storage part is sprayed into the at least one energy storage tank, including: the control module can control a first pump group connected with the first fire extinguishing medium storage part and the at least one spray assembly, respectively, to start, so that the first fire extinguishing medium is sprayed into the at least one energy storage tank through the at least one spray assembly, and the first pump group is controlled to be closed after the first pump group continuously operates for a time length T2. After the control module is controlled to be closed for an intermittent time length T3, the first pump group is controlled to be started again, and the first pump group is controlled to be closed after the first pump group continuously operates for a time length T4. The first fire extinguishing medium is intermittently sprayed into the at least one energy storage tank through the at least one spray assembly for N times in this way. The concentration of the inert gas in the energy storage tank can be maintained, and the rekindling is inhibited. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A structural schematic diagram of the fire extinguishing device for the energy storage system provided by the embodiment of the application is shown.

[0022] Figure 2 A structural schematic diagram of the fire extinguishing device for the energy storage system provided by another embodiment of the application is shown.

[0023] Figure 3 A structural schematic diagram of a fire extinguishing device for an energy storage system provided for another embodiment of the present application is shown in the figure;

[0024] Figure 4 A flowchart of a fire extinguishing control method provided for an embodiment of the present application is shown in the figure.

[0025] Reference signs:

[0026] 100 - first fire extinguishing medium storage part; 200 - second fire extinguishing medium storage part; 300 - control module; 400 - spray assembly;

[0027] 500 - sensing module; 600 - energy storage tank; 110 - filter; 120 - exhaust part; 130 - alarm; 140 - emergency stop control part;

[0028] 150 - battery management system; 401 - delivery pipeline; 402 - spray head; 601 - battery cluster; 701 - first main pipeline;

[0029] 702 - first pump group; 703 - pressure gauge; 704 - flow meter; 705 - second main pipeline; 706 - second pump group;

[0030] 707 - second main control valve; 708 - first pipeline; 709 - first control valve; 710 - second pipeline; 711 - second control valve;

[0031] 801 - branch pipeline; 802 - branch control valve; 901 - detection pipeline; 902 - detection control valve. DETAILED DESCRIPTION

[0032] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] For the convenience of understanding, the application scenario of the fire extinguishing device for the energy storage system involved in the present application will be described first. The fire extinguishing device for the energy storage system provided by the embodiments of the present application is suitable for energy storage systems, such as lithium ion battery energy storage systems, new energy power station energy storage systems, power grid peak regulation and frequency regulation energy storage systems, charging stations, peak-valley arbitrage energy storage systems, etc., and is used for extinguishing fire when the energy storage system catches fire to ensure the fire safety of the energy storage system.

[0034] Taking a lithium ion battery energy storage system as an example, a conventional lithium ion battery energy storage system usually adopts gas fire extinguishing technology. This scheme can effectively extinguish initial fire of lithium ion batteries, but cannot curb thermal runaway of lithium ion batteries. When the fire extinguishing gas spreads below the extinguishing concentration, it is easy to cause rekindling, and the reliability of fire extinguishing is low.

[0035] Based on this, the embodiments of the present application provide a fire extinguishing device for an energy storage system to improve the reliability of extinguishing fire of the energy storage system.

[0036] First refer to Figure 1 , Figure 1 The structure of the fire extinguishing device for the energy storage system provided by the embodiments of the present application is shown. As Figure 1 shown, the fire extinguishing device for the energy storage system provided by the embodiments of the present application can include a first fire extinguishing medium storage part 100, a second fire extinguishing medium storage part 200, a control module 300, at least one spray assembly 400, and at least one sensing module 500.

[0037] Among them, the first fire extinguishing medium storage part 100 stores a first fire extinguishing medium, and the second fire extinguishing medium storage part 200 stores a second fire extinguishing medium. The extinguishing ability of the second fire extinguishing medium is stronger than that of the first fire extinguishing medium. For example, the first fire extinguishing medium storage part 100 can store a liquid gas fire extinguishing medium, such as heptafluoropropane, perfluorohexanone, and other inert gases. The second fire extinguishing medium storage part 200 can store a liquid fire extinguishing medium, such as fire-fighting water. The fire-fighting water in the second fire extinguishing medium storage part 200 can be provided by a municipal pipe network. Specifically, the fire-fighting water can pass through a filter 110 and then enter the second fire extinguishing medium storage part 200.

[0038] At least one spray assembly 400 can be provided in at least one energy storage tank 600 of the energy storage system. When the energy storage tank 600 is multiple, the spray assembly 400 can also be multiple, and the multiple spray assemblies 400 can be one-to-one corresponding to be provided in the multiple energy storage tanks 600. At least one spray assembly 400 can be connected with the first fire extinguishing medium storage part 100 and the second fire extinguishing medium storage part 200 through a pipe assembly, so as to communicate the spray assembly 400 with the first fire extinguishing medium storage part 100 or the second fire extinguishing medium storage part 200 when needed. The spray assembly 400 can output fire extinguishing medium with required pressure and flow rate, and uniformly spray the fire extinguishing medium into the energy storage tank 600.

[0039] The at least one sensing module 500 can be arranged in the at least one energy storage tank 600. When the energy storage tank 600 is multiple, the sensing module 500 can also be multiple, and the multiple sensing modules 500 can be arranged in the multiple energy storage tanks 600 one by one. The sensing module 500 can include multiple sensors, for example, can include a temperature sensor, a smoke sensor, a flammable gas (such as CO, H2, volatile organic compounds (VOC)) concentration sensor, etc., to realize detection of environmental parameters such as the environmental temperature, smoke concentration, and flammable gas concentration in the energy storage tank 600. In specific implementation, when the sensing module 500 includes multiple sensors, the multiple sensors can adopt a discrete design or a multi-in-one integrated design. The at least one sensing module 500 is connected with the control module 300, and the environmental parameters sent by the sensing module 500 to the control module 300 can be a collection of the parameters detected by the multiple sensors.

[0040] The control module 300 can determine the environmental condition in each energy storage tank 600 according to the environmental parameters detected by each sensing module 500, and control the at least one spray assembly 400 to be in communication with the first fire extinguishing medium storage part 100 or the second fire extinguishing medium storage part 200 according to the environmental condition, so that the fire extinguishing medium stored in the fire extinguishing medium storage part in communication with the at least one spray assembly 400 is sprayed into the at least one energy storage tank 600 to extinguish the fire. In actual application, when the environmental parameters detected by the at least one sensing module 500 satisfy a first condition, the control module 300 can control the at least one spray assembly 400 to be in communication with the first fire extinguishing medium storage part 100, so that the first fire extinguishing medium is sprayed into the at least one energy storage tank 600; the environmental parameters satisfying the first condition indicates that the initial fire occurs in the at least one energy storage tank 600. When the environmental parameters detected by the at least one sensing module 500 satisfy a second condition, the control module 300 can control the at least one spray assembly 400 to be in communication with the second fire extinguishing medium storage part 200, so that the second fire extinguishing medium is sprayed into the at least one energy storage tank 600; the environmental parameters satisfying the second condition indicates that the initial fire in the at least one energy storage tank 600 relights.

[0041] In the embodiment of the present application, the control module 300 can determine the environment in the energy storage box 600 according to the environmental parameters detected by the sensing module 500 in real time. When an initial fire occurs in the lithium ion battery in the energy storage box 600 due to thermal runaway or other reasons, the control module 300 can control the spray assembly 400 to communicate with the first fire extinguishing medium storage part 100 to spray the first fire extinguishing medium into the energy storage box 600, thereby extinguishing the fire, and can continuously spray the first fire extinguishing medium to maintain the concentration of inert gas in the energy storage box 600 and maintain the inert environment in the energy storage box 600. In this way, the lithium ion battery can be inhibited from reigniting, and the thermal runaway can be effectively inhibited from spreading between the battery modules. When the lithium ion battery reignites, the control module 300 can control the spray assembly 400 to communicate with the second fire extinguishing medium storage part 200 to spray the second fire extinguishing medium into the energy storage box 600, thereby extinguishing the fire again, and can cool the lithium ion battery, which can inhibit the lithium ion battery from reigniting and inhibit the thermal runaway of the lithium ion battery from spreading. The fire extinguishing device for the energy storage system provided in the embodiment of the present application can use a gas-water combined fire extinguishing method, can extinguish the initial fire, and can extinguish the fire again when it reignites, thereby improving the reliability of extinguishing the fire of the energy storage system, effectively inhibiting the thermal runaway of the lithium ion battery from spreading, and avoiding causing an uncontrollable fire.

[0042] In actual application, when an initial fire occurs in the energy storage box 600, the first fire extinguishing medium can be sprayed once to completely submerge the lithium ion battery, so as to extinguish the open fire. After the first complete submersion spraying, the first fire extinguishing medium can be continuously sprayed, specifically, the first fire extinguishing medium can be intermittently sprayed multiple times to make up for the loss of gas overflow, maintain the concentration of inert gas in the energy storage box 600, inhibit the reignition of the lithium ion battery, and avoid the spread of thermal runaway between the battery modules.

[0043] In specific implementation, each spray assembly 400 can include a plurality of delivery pipelines 401 and a plurality of spray heads 402. The plurality of delivery pipelines 401 can be arrayed, and the plurality of spray heads 402 can be respectively connected to the plurality of delivery pipelines 401. The fire extinguishing medium is sprayed into the energy storage box 600 through the delivery pipelines 401 and the spray heads 402. In specific implementation, the plurality of delivery pipelines 401 can be arrayed in the three-dimensional space in the energy storage box 600, so that the fire extinguishing medium can be fully sprayed to each position in the energy storage box 600, and the spread of thermal runaway between the battery modules can be effectively inhibited.

[0044] In a possible implementation, the pipeline assembly can include a main pipeline assembly and at least one branch pipeline assembly. The first end of the main pipeline assembly can be connected to the first fire extinguishing medium storage 100 and the second fire extinguishing medium storage 200 respectively. The first end of the at least one branch pipeline assembly is connected to the second end of the main pipeline assembly, and the second end of the at least one branch pipeline assembly is connected to the at least one spray assembly 400 one by one. In actual application, the first fire extinguishing medium in the first fire extinguishing medium storage 100 can enter a certain branch pipeline assembly through the main pipeline assembly, and then enter the spray assembly 400 connected to the branch pipeline assembly. The second fire extinguishing medium in the second fire extinguishing medium storage 200 can also enter a certain branch pipeline assembly through the main pipeline assembly, and then enter the spray assembly 400 connected to the branch pipeline assembly.

[0045] In a possible implementation, the main pipeline assembly can include a first main pipeline 701 and a first pump group 702. The first end of the first main pipeline 701 can be connected to the first fire extinguishing medium storage 100 and the second fire extinguishing medium storage 200 respectively. The first end of the at least one branch pipeline assembly can be connected to the second end of the first main pipeline 701 respectively. Specifically, when the branch pipeline assembly is multiple, the first end of the multiple branch pipeline assemblies is connected to the second end of the first main pipeline 701 respectively. The first pump group 702 can be connected to the first main pipeline 701. The first pump group 702 is connected to the control module 300, and the control module 300 can control the first pump group 702 to spray the fire extinguishing medium stored in the fire extinguishing medium storage communicated with the at least one spray assembly 400 into the at least one energy storage tank 600. Specifically, the control module 300 can control the first pump group 702 to pressurize the first fire extinguishing medium or the second fire extinguishing medium flowing through the first main pipeline 701, so as to reach the design required pressure and flow. In actual application, a pressure gauge 703, a flow meter 704 and the like can be arranged on the first main pipeline 701 to detect the pressure, flow and the like of the fire extinguishing medium.

[0046] Figure 2 A structural schematic diagram of a fire extinguishing device for an energy storage system provided by another embodiment of the present application is shown. As shown in FIG. 4, the fire extinguishing device for the energy storage system includes a first fire extinguishing medium storage 100, a second fire extinguishing medium storage 200, a main pipeline assembly, at least one branch pipeline assembly, and at least one spray assembly 400. Figure 2As shown, the main circuit pipe assembly can further include a second main circuit pipe 705, a second pump set 706 and a second main circuit control valve 707. The second main circuit control valve 707 can be connected to the second main circuit pipe 705, and the second main circuit control valve 707 can be arranged close to the first end of the second main circuit pipe 705, for example. The second main circuit control valve 707 can control the opening and closing of the second main circuit pipe 705, and the second main circuit control valve 707 is connected to the control module 300, and the control module 300 can control the opening and closing of the second main circuit control valve 707 to control the opening and closing of the second main circuit pipe 705. The second pump set 706 can be connected to the second main circuit pipe 705, and the second pump set 706 can be arranged close to the second end of the second main circuit pipe 705, for example. The second pump set 706 is connected to the control module 300, and the control module 300 can control the second pump set 706 to pressurize the first fire extinguishing medium or the second fire extinguishing medium flowing through the second main circuit pipe 705 to a required pressure and flow rate.

[0047] In implementation, the second main circuit 705 provided with the second pump set 706 and the second main circuit control valve 707 can be connected in parallel with the first main circuit 701 provided with the first pump set 702. Specifically, the two ends of the second main circuit 705 are connected with the first main circuit 701 respectively, and the first pump set 702 can be located between the two ends of the second main circuit 705, so that the second pump set 706 and the second main circuit control valve 707 can be connected in parallel with the first pump set 702. Specifically, the first end of the second main circuit 705 can be connected with the first end of the first main circuit 701, or the first end of the second main circuit 705 can be connected with the first main circuit 701 near one end of the first pump set 702; the second end of the second main circuit 705 can be connected with the second end of the first main circuit 701, or the second end of the second main circuit 705 can be connected with the first main circuit 701 near the other end of the first pump set 702. The pressure gauge 703 and the flow meter 704 are connected on the first main circuit 701 and can be located outside the two ends of the second main circuit 705. When the first pump set 702 is working normally, the control module 300 can control the second main circuit control valve 707 to be closed, and when the first pump set 702 fails, the control module 300 can control the second main circuit control valve 707 to be opened to connect the second main circuit 705 and control the second pump set 706 to spray the fire extinguishing medium stored in the fire extinguishing medium storage communicating with the at least one spray assembly 400 into the at least one energy storage tank 600. In actual application, the second pump set 706 can be used as a backup pump set. After starting the first pump set 702, the control module 300 can read the data of the pressure gauge 703 and the flow meter 704 on the first main circuit 701, and if the pressure and flow data of the fire extinguishing medium cannot meet the design requirements, the first pump set 702 can be reported to be faulty, the control module 300 can open the second main circuit control valve 707 and start the second pump set 706, so as to improve the operation reliability of the device. Specifically, the second main circuit control valve 707 can be an electromagnetic valve.

[0048] Referring again to Figure 1In a possible implementation, each branch pipeline assembly can include a branch pipeline 801 and a branch control valve 802. The first end of the branch pipeline 801 can be connected with the second end of the main pipeline assembly, and the second end of the branch pipeline 801 can be connected with the spray assembly 400, so that the main pipeline assembly can be connected with the spray assembly 400 through the branch pipeline 801. The branch control valve 802 can be connected on the branch pipeline 801, and the branch control valve 802 can control the on-off of the branch pipeline 801, so as to control the on-off of the main pipeline assembly and the spray assembly 400, and then control the on-off of the first fire extinguishing medium storage 100 or the second fire extinguishing medium storage 200 and the spray assembly 400, thereby controlling the spraying or not of the first fire extinguishing medium or the second fire extinguishing medium. The branch control valve 802 is connected with the control module 300, and the control module 300 can control the on-off of the branch control valve 802 to control the on-off of the branch pipeline 801.

[0049] In specific implementation, when the energy storage tank 600 is multiple, the spray assembly 400 can also be multiple, and the multiple spray assemblies 400 can be one-to-one correspondingly arranged in the multiple energy storage tanks 600. The branch pipeline assembly can be multiple, and the multiple branch pipeline assemblies can be one-to-one correspondingly connected with the multiple spray assemblies 400. In a specific application scenario, the multiple branch pipeline assemblies as a whole include multiple branch control valves 802, and by controlling the on-off of a certain branch control valve 802, the first fire extinguishing medium or the second fire extinguishing medium can be sprayed into a certain energy storage tank 600, so as to achieve fire extinguishing for a certain energy storage tank 600 with fire. It can be understood that by controlling the on-off of a certain number of branch control valves 802, the first fire extinguishing medium or the second fire extinguishing medium can be sprayed into a certain number of energy storage tanks 600, so as to achieve fire extinguishing for a certain number of energy storage tanks 600 with fire. In specific implementation, the branch control valve 802 can be an electromagnetic valve; or the branch control valve 802 can be a manual valve, which is manually controlled in opening and closing, and specifically, the branch control valve 802 can be a one-way valve and the like.

[0050] In a possible implementation, the first end of the main line pipe assembly can be connected with the first fire extinguishing medium storage 100 through a first pipe assembly, and can be connected with the second fire extinguishing medium storage 200 through a second pipe assembly. In implementation, the first pipe assembly can include a first pipe 708 and a first control valve 709. The first end of the first pipe 708 can be connected with the first fire extinguishing medium storage 100, and the second end of the first pipe 708 can be connected with the first end of the main line pipe assembly. The first control valve 709 can be connected on the first pipe 708, and can control the on-off of the first pipe 708, so as to control the on-off of the first fire extinguishing medium storage 100 and the main line pipe assembly, and realize selection of the first fire extinguishing medium for fire extinguishing. The first control valve 709 is connected with the control module 300, and the control module 300 can control the opening and closing of the first control valve 709 to control the on-off of the first pipe 708. Specifically, the first control valve 709 can be an electromagnetic valve.

[0051] The second pipe assembly can include a second pipe 710 and a second control valve 711. The first end of the second pipe 710 can be connected with the second fire extinguishing medium storage 200, and the second end of the second pipe 710 can be connected with the first end of the main line pipe assembly. The second control valve 711 can be connected on the second pipe 710, and can control the on-off of the second pipe 710, so as to control the on-off of the second fire extinguishing medium storage 200 and the main line pipe assembly, and realize selection of the second fire extinguishing medium for fire extinguishing. The second control valve 711 is connected with the control module 300, and the control module 300 can control the opening and closing of the second control valve to control the on-off of the second pipe 710. Specifically, the second control valve 711 can also be an electromagnetic valve.

[0052] In a possible implementation, the fire extinguishing device can further include a detection pipeline assembly. The detection pipeline assembly can include a detection pipeline 901 and a detection control valve 902. A first end of the detection pipeline 901 can be connected with the pipeline assembly, and a second end of the detection pipeline 901 is located outside the energy storage tank 600. Specifically, similar to the branch pipeline 801, the first end of the detection pipeline 901 can be connected with the main pipeline assembly, and more specifically, the first end of the detection pipeline 901 can be connected with the first main pipeline 701. The detection control valve 902 can be connected to the detection pipeline 901, and the detection control valve 902 can control the opening and closing of the detection pipeline 901. The detection control valve 902 can be connected with the control module 300, and the control module 300 can control the opening and closing of the detection control valve 902 to control the opening and closing of the detection pipeline 901. In actual application, the detection pipeline assembly can be used for pipeline maintenance, for example, whether the fire extinguishing medium can flow out of the first main pipeline 701 smoothly can be tested, and the pressure, flow and the like of the fire extinguishing medium flowing out can be detected. Specifically, the detection control valve 902 can be an electromagnetic valve; or the detection control valve 902 can be a manual valve, which is manually controlled to be opened or closed, and specifically, the detection control valve 902 can be a one-way valve and the like.

[0053] In an implementation, the fire extinguishing device can further include an exhaust part 120, which is arranged on the energy storage tank 600. The exhaust part 120 can exhaust the combustible flue gas generated due to thermal runaway of the battery inside the energy storage tank 600, so as to avoid accumulation of the combustible flue gas in the energy storage tank 600 and reduce the possibility of fire. The exhaust part 120 can be connected with the control module 300, and the control module 300 can control the start and stop of the exhaust part 120. Specifically, the exhaust part 120 can be arranged on the top of the energy storage tank 600, and the exhaust part 120 can be a fan.

[0054] The fire extinguishing device can further include an alarm 130 arranged outside the energy storage tank 600. The alarm 130 can be connected with the control module 300, and the control module 300 can control the start and stop of the alarm 130. Specifically, when it is detected that there is a risk of fire in the energy storage tank 600, the control module 300 can control the alarm 130 to alarm, so that the manager can discover the risk of fire in time and take measures to avoid serious consequences. The alarm 130 can be an audible and visual alarm 130, which can simultaneously send audible and visual alarm signals. The alarm 130 can have multiple operating states, such as low-frequency and high-frequency operating states, to distinguishably alarm different fires.

[0055] The fire extinguishing device may also include an emergency stop control unit 140, which is connected to the control module 300 and is used to start or stop the spraying action in an emergency. This allows for human intervention in case of misjudgment, such as manually starting the spraying action when a fire has occurred but the spraying action has not automatically started, or manually stopping the spraying action when the spraying action has automatically started but no fire has occurred. Specifically, based on the signal from the emergency stop control unit 140, the control module 300 can control the spraying of a first extinguishing agent or a second extinguishing agent into the energy storage tank 600, or control the cessation of the spraying of the first extinguishing agent or the second extinguishing agent into the energy storage tank 600. For example, upon receiving a first trigger signal from the emergency stop control unit 140, the control module 300 can control at least one spraying component 400 to disconnect from the first extinguishing medium storage unit 100 or the second extinguishing medium storage unit 200, thereby stopping the spraying of the first extinguishing medium or the second extinguishing medium into the energy storage tank 600; upon receiving a second trigger signal from the emergency stop control unit 140, the control module 300 can control at least one spraying component 400 to connect with the first extinguishing medium storage unit 100 or the second extinguishing medium storage unit 200, thereby enabling the spraying of the first extinguishing medium or the second extinguishing medium into the energy storage tank 600.

[0056] This application also provides an energy storage system, such as... Figure 1 As shown, the system may include at least one energy storage box 600 and a fire extinguishing device for an energy storage system as described in the above embodiments. Each energy storage box 600 may contain multiple battery clusters 601, and each battery cluster 601 may include multiple battery modules. At least one ejection assembly 400 of the fire extinguishing device is disposed within at least one energy storage box 600, and at least one sensing module 500 is disposed within at least one energy storage box 600.

[0057] Figure 1 An example is provided showing an implementation with one energy storage box 600, one fire extinguishing device ejection assembly 400, and one sensing module 500. This ejection assembly 400 is housed within one energy storage box 600, and this sensing module 500 is also housed within this energy storage box 600; that is, one energy storage box 600 is matched with one ejection assembly 400 and one sensing module 500. The control module 300 controls this ejection assembly 400 to communicate with either the first fire extinguishing medium storage unit 100 or the second fire extinguishing medium storage unit 200.

[0058] Figure 3 A schematic diagram of the structure of a fire extinguishing device for an energy storage system provided in another embodiment of this application is shown. Figure 3The energy storage box 600 is exemplified as multiple, the spray assembly 400 of the fire extinguishing device is also multiple, and the sensing module 500 is also multiple. The multiple spray assemblies 400 are arranged one by one in the multiple energy storage boxes 600, and the multiple sensing modules 500 are also arranged one by one in the multiple energy storage boxes 600, that is, each energy storage box 600 matches one spray assembly 400 and one sensing module 500. Specifically, the spray assembly 400 in each energy storage box 600 can be connected with the first main pipeline 701 through a branch pipeline 801, and each sensing module 500 is connected with the control module 300. Whether the fire occurs in each energy storage box 600 is determined through the sensing module 500, according to the fire condition of each energy storage box 600, the control module 300 can control one spray assembly 400 to be in communication with the first fire extinguishing medium storage part 100 or the second fire extinguishing medium storage part 200, or the control module 300 can control multiple spray assemblies 400 to be in communication with the first fire extinguishing medium storage part 100 or the second fire extinguishing medium storage part 200. Thus, one set of fire extinguishing device can meet the fire extinguishing demand of multiple energy storage boxes 600, and the fire fighting cost is reduced.

[0059] Figure 4 A flow chart of the fire extinguishing control method provided by the embodiment of the application is shown. The embodiment of the application also provides a fire extinguishing control method, which can be applied to the fire extinguishing device for the energy storage system or the energy storage system in the above-mentioned embodiments, and the method can include the following steps, as shown in the flow chart. Figure 4

[0060] The control module 300 acquires the environmental parameters in the at least one energy storage box 600 of the energy storage system detected by the at least one sensing module 500, so that the control module 300 can continuously monitor the environmental parameters in each energy storage box 600. In actual application, the environmental parameters in each energy storage box 600 can be collected by the sensing module 500 to determine the fire, and the battery management system (BMS) 150 of the energy storage system can also be used to assist in collecting the battery module parameters to determine the fire. Specifically, the BMS can collect the temperature, voltage, current and other parameter information of each battery module in one or more energy storage boxes 600, and output the thermal runaway and thermal runaway diffusion alarm. The control module 300 can comprehensively determine according to the parameter information collected by the sensing module 500 and the BMS, and identify the energy storage box 600 in which the fire occurs;

[0061] ​When the environmental parameter detected by the at least one sensing module 500 meets the first condition, the environmental parameter meeting the first condition indicates that an initial fire occurs in the at least one energy storage tank 600, and the control module 300 can control the at least one ejection assembly 400 to be in communication with the first fire extinguishing medium storage 100, so that the first fire extinguishing medium in the first fire extinguishing medium storage 100 is ejected into the at least one energy storage tank 600;

[0062] When the environmental parameter detected by the at least one sensing module 500 meets the second condition, the environmental parameter meeting the second condition indicates that the initial fire in the at least one energy storage tank 600 is rekindled, and the control module 300 can control the at least one ejection assembly 400 to be in communication with the second fire extinguishing medium storage 200, so that the second fire extinguishing medium in the second fire extinguishing medium storage 200 is ejected into the at least one energy storage tank 600.

[0063] In summary, since the extinguishing ability of the second fire extinguishing medium is greater than that of the first fire extinguishing medium, the fire can be reliably extinguished when the battery rekindles in the energy storage tank, and serious consequences caused by uncontrollable fire can be avoided.

[0064] In a possible implementation, the control module 300 can set a first threshold value and a second threshold value of the environmental parameter, where the first threshold value can correspond to a situation that the battery module in the energy storage tank 600 fails and generates smoke but does not catch fire, and the second threshold value can correspond to a situation that the battery module is in thermal runaway and catches fire. The following describes the fire extinguishing process, please refer to Figure 1 and Figure 4 :

[0065] When the environmental parameter is greater than the first threshold value, the control module 300 controls the smoke generated inside the energy storage tank 600 to be discharged to the outside of the energy storage tank 600, specifically, the control module 300 controls the exhaust portion 120 on the energy storage tank 600 to start, so as to discharge the smoke in the energy storage tank 600 to the outside of the energy storage tank 600; and the control module 300 controls the alarm 130 on the energy storage tank 600 to start, and controls the alarm 130 to operate at a first frequency, such as operating at a low frequency, i.e., flashing at a low frequency and emitting a low-frequency alarm sound. When the environmental parameter returns to below the first threshold value, the control module 300 controls the exhaust portion 120 to be closed, and controls the alarm 130 to be closed.

[0066] When the environmental parameter is greater than the second threshold value, it indicates that an initial fire occurs in the energy storage box 600, the control module 300 controls the alarm 130 to operate at a second frequency, such as high frequency; and enters a delay state to gain time for maintenance and fire-fighting personnel to arrive at the scene; if there is no emergency stop signal, after the delay time T1, the control module 300 controls to stop discharging the smoke generated in the energy storage box 600 to the outside of the energy storage box 600, specifically, the control module 300 controls the exhaust part 120 to close, and the control module 300 controls the first fire extinguishing medium storage part 100 to open, specifically, the control valve 709 is controlled to open, the first fire extinguishing medium enters the first pump group 702, and the first pump group 702 is controlled to start, and the branch control valve 802 is controlled to open, so that the first fire extinguishing medium in the first fire extinguishing medium storage part 100 can be sprayed into the energy storage box 600 through the first main pipe 701, the branch pipe 801 and the spray assembly 400; after the first pump group 702 continuously operates for a time T2, that is, after the first fire extinguishing medium continuously sprays for a time T2, the first pump group 702 is controlled to close. In actual application, T1 is the delay time before the first fire extinguishing medium is sprayed, which can provide time for manual judgment of fire, and can reduce false alarms; T2 is the time required for one-time full flooding of the first fire extinguishing medium, T2 can be calculated in advance, specifically, the total amount of first fire extinguishing medium required for one-time full flooding can be calculated according to the size of the space in the energy storage box 600 and the concentration of the first fire extinguishing medium required in the energy storage box 600, and T2 can be calculated according to the flow meter 704 of the first pump group 702.

[0067] When the environmental parameter is greater than the second threshold value again, it indicates that the initial fire in the energy storage box 600 recovers, or the BMS reports that the thermal runaway diffusion between the battery modules occurs, the control module 300 controls the second fire extinguishing medium storage part 200 to open, specifically, the control module 300 controls the second control valve 711 to open, and controls the first pump group 702 to start, and controls the branch control valve 802 to open, the second fire extinguishing medium in the second fire extinguishing medium storage part 200 is sprayed into the energy storage box 600 through the first main pipe 701, the branch pipe 801 and the spray assembly 400; after the first pump group 702 continuously operates for a time T5, that is, after the second fire extinguishing medium continuously sprays for a time T5, the first pump group 702 is controlled to close. T5 can be specifically set according to the actual fire extinguishing requirement and the supply capacity of the second fire extinguishing medium. If there is no thermal runaway diffusion, and the environmental parameter returns to below the first threshold value, the fire is eliminated, and the control module 300 controls the alarm 130 to close.

[0068] In a possible implementation, the control module 300 can control the first fire extinguishing medium to intermittently spray to maintain the inert gas concentration in the energy storage tank 600, and maintain the inert environment in the energy storage tank 600. Specifically, after the intermittent time T3, the control module 300 controls the first pump set 702 to start again, and controls the first pump set 702 to close after the first pump set 702 continuously operates for the time T4, and so on. The control module 300 controls the first fire extinguishing medium to intermittently spray into the energy storage tank 600 through the spraying assembly 400 for N times, and then controls the first control valve 709 to close and controls the first pump set 702 to close.

[0069] In an implementation, T3 is the interval time of the intermittent spraying of the first fire extinguishing medium, i.e., the interval time between the spraying and the next spraying; T4 is the spraying time in the intermittent spraying process; and N is the number of intermittent sprays. Specifically, the dispersion speed of the first fire extinguishing medium in the energy storage tank 600 can be measured by pre-experiment. If 10% of the initial total amount (the total amount of the first fire extinguishing medium required for one-time full flooding spraying) is dispersed every 10 minutes, i.e., 10% of the initial total amount is dispersed every 10 minutes, 20% of the initial total amount is dispersed every 20 minutes, then if the inert environment needs to be maintained for 30 minutes, 30% of the initial total amount needs to be supplemented within 30 minutes. Thus, the total spraying time of the intermittent spraying can be calculated according to the flow rate of the first pump set 702, and the total spraying time is evenly distributed within 30 minutes, so that T3, T4 and N can be set. For example, when the inert environment needs to be maintained for 30 minutes, the total spraying time of the intermittent spraying is 3 minutes, then the intermittent spraying can be performed for 3 times (N), each time for 1 minute (T4), and each time with an interval of 9 minutes (T3), for example, spraying once at the 10th, 20th and 30th minute, each time for 1 minute.

[0070] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed in the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A fire extinguishing device for an energy storage system, characterized in that, It includes a first extinguishing medium storage unit, a second extinguishing medium storage unit, a control module, at least one ejection assembly, at least one sensing module, an exhaust unit, and an alarm. The first fire extinguishing medium storage section stores a first fire extinguishing medium, and the second fire extinguishing medium storage section stores a second fire extinguishing medium. The fire extinguishing capacity of the second fire extinguishing medium is stronger than that of the first fire extinguishing medium. The first fire extinguishing medium includes heptafluoropropane or perfluorohexanone, and the second fire extinguishing medium includes fire-fighting water. The at least one ejection component is disposed in at least one energy storage box of the energy storage system and is used to communicate with the first fire extinguishing medium storage unit or the second fire extinguishing medium storage unit. The at least one sensing module is disposed inside the at least one energy storage box and is used to detect environmental parameters inside the at least one energy storage box; The exhaust section is disposed on the at least one energy storage box, and the alarm is disposed outside the at least one energy storage box; The control module is connected to the at least one sensing module and is used for: When the environmental parameter detected by the at least one sensing module is greater than the first threshold, the exhaust section is controlled to start to discharge the smoke in the at least one energy storage box, and the alarm is controlled to sound an alarm at a first frequency, wherein the first threshold corresponds to the situation where smoke is generated in the at least one energy storage box but no fire occurs. When the environmental parameters detected by the at least one sensing module meet the first condition, the at least one ejection assembly is controlled to connect with the first fire extinguishing medium storage unit so that the first fire extinguishing medium is ejected into the at least one energy storage box; the environmental parameters meeting the first condition specifically means that the environmental parameters are initially greater than the second threshold, indicating that an initial fire has occurred in the at least one energy storage box, wherein the second threshold corresponds to the situation where thermal runaway fire occurs in the at least one energy storage box; When the environmental parameters detected by the at least one sensing module meet the second condition, the at least one ejection assembly is controlled to connect with the second extinguishing medium storage unit so that the second extinguishing medium is ejected into the at least one energy storage box; the environmental parameters meeting the second condition specifically means that the environmental parameters are greater than the second threshold again, indicating that the initial fire has reignited in the at least one energy storage box; The control module controls at least one ejection assembly to communicate with the first extinguishing medium storage unit, so that the first extinguishing medium in the first extinguishing medium storage unit is ejected into the at least one energy storage tank, including: The control module controls the start of the first pump group, which is connected to the first fire extinguishing medium storage unit and the at least one spraying component respectively, so that the first fire extinguishing medium is sprayed into the at least one energy storage tank through the at least one spraying component. After the first pump group has been running continuously for a period of T2, the control module controls the first pump group to shut down. After an intermittent duration T3, the control module controls the first pump group to start again, and after the first pump group has been running continuously for a duration T4, it controls the first pump group to shut down. In this way, the first extinguishing medium is controlled to be intermittently sprayed into the at least one energy storage tank N times through the at least one spraying component. Wherein, T2 is determined based on the space size inside the at least one energy storage box, the concentration of the first extinguishing medium required inside the at least one energy storage box, and the flow rate of the first pump group; T3, T4, and N are determined based on the spillage rate of the first extinguishing medium inside the at least one energy storage box, the target maintenance time of the inerting environment inside the at least one energy storage box, and the flow rate of the first pump group.

2. The fire extinguishing device for an energy storage system as described in claim 1, characterized in that, Each of the ejection components includes multiple delivery lines and multiple nozzles, the multiple delivery lines being arranged in an array, and the multiple nozzles being connected to the multiple delivery lines.

3. The fire extinguishing device for an energy storage system as described in claim 1, characterized in that, The at least one ejection assembly is used to communicate with the first extinguishing medium storage unit or the second extinguishing medium storage unit via a piping assembly; The piping assembly includes a main piping assembly and at least one branch piping assembly; the first end of the main piping assembly is respectively connected to the first extinguishing medium storage unit and the second extinguishing medium storage unit; the first end of the at least one branch piping assembly is respectively connected to the second end of the main piping assembly, and the second end of the at least one branch piping assembly is correspondingly connected to the at least one ejection assembly.

4. The fire extinguishing device for an energy storage system as described in claim 3, characterized in that, The main pipeline assembly includes a first main pipeline and a first pump set; The first pump unit is installed on the first main pipeline. The first end of the first main pipeline is used to connect to the first fire extinguishing medium storage unit and the second fire extinguishing medium storage unit, respectively. The first end of the at least one branch pipeline assembly is connected to the second end of the first main pipeline in a corresponding manner. The control module is also connected to the first pump group, and the control module is also used to control the first pump group to spray the fire extinguishing medium stored in the fire extinguishing medium storage section connected to the at least one spraying component into the at least one energy storage tank.

5. The fire extinguishing device for an energy storage system as described in claim 4, characterized in that, The main pipeline assembly also includes a second main pipeline, a second pump set, and a second main pipeline control valve; The second pump set and the second main line control valve are installed on the second main line pipeline; the second main line pipeline with the second pump set and the second main line control valve is connected in parallel with the first main line pipeline with the first pump set. The control module is also connected to the second main control valve and the second pump group. The control module is also used to control the second main control valve to close when the first pump group is working normally, and to control the second main control valve to open to connect the second main pipeline when the first pump group fails, and to control the second pump group to spray the fire extinguishing medium stored in the fire extinguishing medium storage section connected to the at least one spraying component into the at least one energy storage tank.

6. The fire extinguishing device for an energy storage system as described in claim 3, characterized in that, Each of the branch piping assemblies includes a branch piping and a branch control valve; The branch control valve is installed on the branch pipeline, the first end of the branch pipeline is connected to the second end of the main pipeline assembly, and the second end of the branch pipeline is connected to the ejection assembly; The control module is also connected to the branch control valve, and the control module is also used to control the opening or closing of the branch control valve to control the on / off of the branch pipeline.

7. The fire extinguishing device for an energy storage system as described in claim 3, characterized in that, The first end of the main pipeline assembly is used to connect to the first fire extinguishing medium storage unit through the first pipeline assembly, and is used to connect to the second fire extinguishing medium storage unit through the second pipeline assembly; The first piping assembly includes a first pipe and a first control valve disposed on the first pipe. A first end of the first pipe is connected to the first fire extinguishing medium storage unit, and a second end of the first pipe is connected to the first end of the main piping assembly. The second piping assembly includes a second piping and a second control valve disposed on the second piping. The first end of the second piping is used to connect to the second fire extinguishing medium storage unit, and the second end of the second piping is connected to the first end of the main piping assembly. The control module is also connected to the first control valve and the second control valve respectively. The control module is also used to control the first control valve to open or close to control the on / off state of the first pipeline, and to control the second control valve to open or close to control the on / off state of the second pipeline.

8. The fire extinguishing device for an energy storage system as described in claim 2, characterized in that, The fire extinguishing device also includes a detection pipeline assembly, which includes a detection pipeline and a detection control valve disposed on the detection pipeline. The first end of the detection pipeline is connected to the pipeline assembly, and the second end of the detection pipeline is located outside the energy storage box. The control module is also connected to the detection control valve, and the control module is also used to control the detection control valve to open or close in order to control the on / off state of the detection pipeline.

9. The fire extinguishing device for an energy storage system as described in any one of claims 1 to 8, characterized in that, The fire extinguishing device also includes an emergency stop control unit, and the control module is also connected to the emergency stop control unit. The control module is also used to control the connection and disconnection of the at least one ejection component with the first fire extinguishing medium storage unit or the second fire extinguishing medium storage unit when it receives a trigger signal from the emergency stop control unit.

10. An energy storage system, characterized in that, It includes at least one energy storage box, and a fire extinguishing device for an energy storage system as described in any one of claims 1 to 9; The at least one energy storage box is equipped with multiple battery modules; At least one ejection component of the fire extinguishing device is disposed in the at least one energy storage box, and at least one sensing module is disposed in the at least one energy storage box.

11. A fire extinguishing control method, characterized in that, The method, applied to a fire extinguishing device for an energy storage system as described in any one of claims 1 to 9 or an energy storage system as described in claim 10, comprises: The control module acquires environmental parameters inside at least one energy storage box detected by at least one sensing module; When the environmental parameter detected by the at least one sensing module is greater than the first threshold, the exhaust section on the at least one energy storage box is activated to discharge the smoke inside the at least one energy storage box, and the alarm located outside the at least one energy storage box is activated at a first frequency, wherein the first threshold corresponds to the situation where smoke is generated inside the at least one energy storage box but no fire occurs. When the environmental parameters detected by the at least one sensing module meet the first condition, the control module controls at least one ejection component to connect with the first extinguishing medium storage section, so that the first extinguishing medium in the first extinguishing medium storage section is ejected into the at least one energy storage box; the environmental parameters meeting the first condition specifically means that the environmental parameters are initially greater than a second threshold, indicating that an initial fire has occurred in the at least one energy storage box, wherein the second threshold corresponds to the case of thermal runaway fire in the at least one energy storage box; When the environmental parameters detected by the at least one sensing module meet the second condition, the control module controls the at least one ejection component to connect with the second extinguishing medium storage section, so that the second extinguishing medium in the second extinguishing medium storage section is ejected into the at least one energy storage box; the environmental parameters meeting the second condition specifically means that the environmental parameters are greater than the second threshold again, indicating that the initial fire has reignited in the at least one energy storage box; The control module controls at least one ejection assembly to communicate with the first extinguishing medium storage unit, so that the first extinguishing medium in the first extinguishing medium storage unit is ejected into the at least one energy storage tank, including: The control module controls the start of the first pump group, which is connected to the first fire extinguishing medium storage unit and the at least one spraying component respectively, so that the first fire extinguishing medium is sprayed into the at least one energy storage tank through the at least one spraying component. After the first pump group has been running continuously for a period of T2, the control module controls the first pump group to shut down. After an intermittent duration T3, the control module controls the first pump group to start again, and after the first pump group has been running continuously for a duration T4, it controls the first pump group to shut down. In this way, the first extinguishing medium is controlled to be intermittently sprayed into the at least one energy storage tank N times through the at least one spraying component. Wherein, T2 is determined based on the space size inside the at least one energy storage box, the concentration of the first extinguishing medium required inside the at least one energy storage box, and the flow rate of the first pump group; T3, T4, and N are determined based on the spillage rate of the first extinguishing medium inside the at least one energy storage box, the target maintenance time of the inerting environment inside the at least one energy storage box, and the flow rate of the first pump group.

Images