CN216629485U - Energy storage device - Google Patents

Abstract

The utility model relates to the technical field of energy storage equipment safety, and discloses an energy storage device, which comprises a body, and a gas fire extinguishing device, a liquid fire extinguishing device, a detection module and a controller which are arranged in the body, wherein a plurality of battery modules are arranged in the body; the liquid fire extinguishing device comprises a liquid inlet pipe and at least one branch pipeline communicated with the liquid inlet pipe, each branch pipeline is arranged at the periphery of the battery module, a plurality of liquid outlets are arranged on each branch pipeline at intervals, and each liquid outlet faces the battery module; the gas fire extinguishing device, the liquid fire extinguishing device and the detection module are respectively and electrically connected with the controller; adopt gaseous extinguishing in earlier stage and later stage liquid to put out a fire and combine together, can high-efficiently put out a fire, prevent after burning, simple structure, improved the conflagration controllability and the factor of safety of body.

Description

Energy storage device

Technical Field

The utility model relates to the technical field of energy storage equipment safety, in particular to an energy storage device.

Background

The energy storage technology is widely applied to the fields of renewable energy sources, distributed energy sources, smart power grids and the like, and electrochemical energy storage represented by lithium iron phosphate energy storage batteries is developed very rapidly due to the advantages of high energy storage density and power density, high efficiency, rapid technical progress, large development potential and the like. The energy storage system usually adopts a cabinet body or a box body as an outer enclosure structure, and auxiliary devices such as an energy storage battery, a bracket, air conditioning ventilation and the like are prefabricated into a whole, so that the energy storage system is widely applied at home and abroad, and has huge future development space.

In recent years, the fire cases of the energy storage power station are common, and the fire safety problem of the energy storage power station is a focus of attention at home and abroad. The existing energy storage power station fire-fighting system mainly has the following problems:

1. a majority of gas fire extinguishing systems are provided with heptafluoropropane which is mainly used for effectively extinguishing the fire of an energy storage cabinet at the initial stage of an electrical fire, but the cooling effect is limited, the thermal runaway of a battery cannot be stopped, a large amount of combustible gas is generated in the energy storage cabinet, and after the fire is extinguished, the existing fire case is frequently reignited due to the fact that the temperature in the energy storage cabinet is too high and a large amount of combustible gas is generated.

2. A liquid fire extinguishing system can adopt a liquid spraying fire extinguishing mode, a manual liquid spraying standard interface is reserved outside an energy storage cabinet body, the manual liquid spraying standard interface is manually communicated with an external fire fighting liquid source (an outdoor fire hydrant or a fire engine and the like) in case of fire, and then a liquid supply system is started to extinguish the fire. Although the scheme is high in reliability, a person is close to the energy storage cabinet to open the liquid fire-fighting interface on the cabinet body, and high safety risks exist.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model aims to provide an energy storage device, which adopts a fire-fighting system combining early-stage gas fire extinguishing and later-stage liquid fire extinguishing, can efficiently extinguish fire, prevent re-combustion, has simple structure, is safe and reliable, improves the fire control capability of the energy storage fire-fighting system, and reduces loss at the same time.

In order to achieve the above object, the present invention provides an energy storage device comprising: the fire extinguishing device comprises a body, and a liquid fire extinguishing device, a gas fire extinguishing device, a detection module and a controller which are arranged in the body;

a plurality of battery modules are arranged in the body;

the liquid fire extinguishing device comprises a liquid inlet pipe and at least one branch pipeline communicated with the liquid inlet pipe, each branch pipeline is arranged on the periphery of the battery module, a plurality of liquid outlets are arranged on each branch pipeline at intervals, and each liquid outlet faces the battery module;

the liquid fire extinguishing device, the gas fire extinguishing device and the detection module are respectively electrically connected with the controller.

Preferably, a plurality of the battery modules are sequentially arranged in parallel in the body, and the branch pipes are respectively perpendicular to the battery modules;

the liquid outlet is arranged between every two adjacent battery modules.

Preferably, the branch pipe is provided in plurality in the circumferential direction of the battery module.

Preferably, a liquid inlet is arranged on the body, the liquid inlet is connected with the liquid inlet pipe, and a liquid inlet valve is arranged on the liquid inlet pipe;

the bottom of the body is provided with a liquid outlet, the liquid outlet is connected with a liquid discharge pipe, and the liquid discharge pipe is provided with a liquid discharge valve.

Preferably, the gas fire extinguishing device comprises a fire extinguishing agent storage bottle, a fire extinguishing agent conveying pipeline and a spray head for spraying gas to the battery module;

one end of the fire extinguishing agent conveying pipeline is connected with the fire extinguishing agent storage bottle, and the other end of the fire extinguishing agent conveying pipeline is connected with the spray head;

and an air inlet valve is arranged on the fire extinguishing agent storage bottle.

Preferably, the fire extinguishing agent conveying pipeline comprises a main pipeline and at least one branch gas pipe communicated with the main pipeline;

one end of each branch air pipe is communicated with the main pipeline, and the other end of each branch air pipe is provided with the spray head;

each shower nozzle all locates in the this body, and be located battery module's top.

Preferably, each battery module is provided with a liquid fire extinguishing joint and/or a gas fire extinguishing joint communicated with the interior of the battery module, and the liquid fire extinguishing joint is connected with the liquid inlet pipe through a first communication pipe so as to extinguish liquid fire in the battery module;

the gas fire extinguishing joint is connected with the fire extinguishing agent conveying pipeline through a second communicating pipe so as to extinguish gas inside the battery module.

Preferably, the detection module comprises a gas detector, a temperature detector, a battery thermal runaway detector and a smoke detector which are electrically connected with the controller;

the gas detector is a combustible gas detector and/or a VOC (volatile organic compound) detector, and the battery thermal runaway detector is arranged inside the battery module.

Preferably, the upper part of the body is provided with a pressure relief port and an exhaust port which are communicated with the outside, and the pressure relief port is provided with a pressure relief valve; and the exhaust port is provided with an exhaust device electrically connected with the controller.

Preferably, the body further comprises an alarm device, and the alarm device is electrically connected with the controller.

The utility model provides an energy storage device, compared with the prior art, the energy storage device has the following beneficial effects:

the utility model provides an energy storage device comprising: the fire extinguishing device comprises a body, and a gas fire extinguishing device, a liquid fire extinguishing device, a detection module and a controller which are arranged in the body, wherein a plurality of battery modules are arranged in the body and are sequentially arranged in the body in parallel; liquid extinguishing device includes feed liquor pipe and a plurality of lateral conduits that communicate with the feed liquor pipe, each lateral conduit locates battery module's periphery and perpendicular to battery module setting respectively, this internal each corner is located to lateral conduit among the liquid extinguishing device, be long and thin tubular structure, the structure rule, small, occupation space is little, and simultaneously, the interval is equipped with a plurality of liquid outlets on each lateral conduit, each liquid outlet just is located two adjacent battery module's clearance department towards battery module, and simultaneously, be equipped with liquid fire extinguishing joint on the battery module, liquid fire extinguishing joint connects the feed liquor pipe through first connecting pipe, therefore, but outside liquid source homogeneous action to battery module's surface and/or inside, realize this internal liquid fire extinguishing system's full coverage.

Furthermore, the gas fire extinguishing device sprays the fire extinguishing agent out of the upper part of the body to dip the body from top to bottom, meanwhile, the battery module is provided with a gas fire extinguishing joint, and the gas fire extinguishing joint is connected with a fire extinguishing agent conveying pipeline through a second communicating pipe so as to extinguish gas inside the battery module, so that the structural layout of the gas fire extinguishing device is more reasonable, and the fire extinguishing effect is effectively improved; this energy memory adopts earlier stage gas to put out a fire and later stage liquid to put out a fire and combines together, and its safe and reliable can real-time detection, and the initiative is put out a fire, prevents the after combustion, has improved energy storage fire extinguishing systems 'fire control ability, has effectively increased energy memory's factor of safety, simple structure simultaneously, the marketing of being convenient for.

Drawings

Fig. 1 is a schematic overall structure diagram of an energy storage device according to an embodiment of the utility model;

FIG. 2 is a schematic diagram of a control system for an energy storage device according to an embodiment of the utility model;

fig. 3 is a flowchart of a method for controlling an energy storage device according to an embodiment of the utility model.

In the figure: 100. a body;

1. a liquid fire extinguishing device; 11. a liquid inlet; 12. a liquid inlet valve; 13. a liquid inlet pipe; 14. a communicating pipe; 15. a branch pipe; 16. a liquid outlet;

2. a gas fire extinguishing device; 21. a fire extinguishing agent storage bottle; 22. an intake valve; 23. a fire suppressant delivery line; 231. a main pipeline; 232. a branch air pipe; 24. a spray head;

3. a battery module; 4. a liquid discharge port; 5. a liquid discharge pipe; 6. a drain valve; 7. a pressure relief valve; 8. an alarm device; 9. an exhaust device; 30. a controller; 40. a gas detector; 50. a temperature detector; 60. a battery thermal runaway detector; 70. a smoke detector.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It will be understood that in the description of the present application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application. The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e. a feature defined as "first", "second" may explicitly or implicitly include one or more of such features. Further, unless otherwise specified, "a plurality" means two or more.

It should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1, an embodiment of the present invention provides an energy storage device, which includes a body 100, and a gas fire extinguishing apparatus 2, a liquid fire extinguishing apparatus 1, a detection module, and a controller 30 installed in the body 100; a plurality of battery modules 3 are arranged in the body 100; preferably, a plurality of battery modules 3 are sequentially arranged in parallel in the body 100, specifically, a certain gap is formed between each battery module 3, and the battery modules are stacked in parallel in the body 100; wherein, the gas fire extinguishing device 2, the liquid fire extinguishing device 1 and the detection module are respectively electrically connected with the controller 30.

As shown in fig. 1, the liquid fire extinguishing apparatus 1 includes a liquid inlet pipe 13 and at least one branch pipe 15 communicated with the liquid inlet pipe 13, each branch pipe 15 is provided at the periphery of the battery module 3, preferably, the number of the branch pipes 15 is four, the four branch pipes 15 are uniformly distributed at the periphery of the battery module 3 and are respectively vertically provided at four corners of the body 100, each branch pipe 15 is communicated with the liquid inlet pipe 13 through a communicating pipe 14, further preferably, the four branch pipes 15 are respectively fixedly connected with the body 100, thereby enhancing the structural stability of the four branch pipes 15; simultaneously, each lateral conduit 15 is gone up the interval and is equipped with a plurality of liquid outlets 16, and each liquid outlet 16 is towards battery module 3, and preferably, the opening diameter of each liquid outlet 16 on each lateral conduit 15 can be 6mm, and a plurality of liquid outlets 16 correspond and locate two adjacent battery module 3's clearance department for evenly spray the upper surface, the lower surface of battery module 3 with outside liquid source, in order to put out a fire and cool down battery module 3.

Preferably, in other preferred embodiments, the body 100 is provided with the liquid inlet 11, the liquid inlet 11 is connected to a liquid inlet pipe 13 of the liquid fire extinguishing apparatus 1, the liquid inlet pipe 13 is provided with a liquid inlet valve 12, meanwhile, the liquid inlet pipe 13 is provided with an external liquid source interface, when liquid fire extinguishing needs to be performed on the body 100, the liquid inlet valve 12 is opened, the external liquid source is sequentially sprayed on the battery module 3 through the liquid inlet valve 12, the liquid inlet pipe 13, the communicating pipe 14, the branch pipeline 15 and the liquid outlet 16, so that the liquid fire extinguishing apparatus 1 can efficiently complete fire extinguishing and cooling of the battery module 3 in the body 100, and manual fire extinguishing is not needed.

Preferably, in other preferred embodiments, each battery module 3 is provided with a liquid fire extinguishing joint (not shown in the figures), and the liquid fire extinguishing joint is connected to the liquid inlet pipe through a first communicating pipe (not shown in the figures) to extinguish liquid fire inside the battery module 3; particularly, through set up liquid on battery module 3 and put out a fire the joint, outside water source loops through feed liquor valve 12, feed liquor pipe 13, first connecting pipe, liquid and puts out a fire the joint and spreads to inside battery module 3, makes liquid direct action inside battery module 3 from this, further strengthens putting out a fire, the cooling effect to battery module 3.

It can be understood that when starting liquid extinguishing apparatus, the battery has taken place thermal runaway inefficacy, and battery module 3 has stopped the operation simultaneously, in order to further improve the cooling effect of putting out a fire to battery module, can set up liquid fire extinguishing joint on battery module, with inside external water source introduction battery module 3, in addition, still be equipped with the delivery port (not shown in the figure) on the battery module to the inside fire control waste liquid of discharge battery module.

In order to facilitate the discharge of the fire-fighting waste liquid, in other preferred embodiments, the bottom of the body 100 is further provided with a liquid discharge port 4, the liquid discharge port 4 is connected with a liquid discharge pipe 5, and the liquid discharge pipe 5 is provided with a liquid discharge valve 6, so that after the liquid fire extinguishing device 1 is opened, the fire-fighting waste liquid is generated in the body 100, at the moment, the liquid discharge valve 6 is synchronously opened, and the fire-fighting waste liquid is discharged out of the body 100 through the liquid discharge pipe 5 and the liquid discharge valve 6, so that the fire-fighting waste liquid can be organically guided through a pipeline to be discharged, and the environment pollution is avoided.

Based on this, the branch pipes 15 in the liquid fire extinguishing apparatus 1 provided in the embodiment of the present invention are disposed at each corner in the main body 100, and have a slender tubular structure, regular structure, small volume, and small occupied space, meanwhile, a plurality of liquid outlets 16 are disposed at intervals on each branch pipe 15, each liquid outlet 16 faces the battery module 3 and is located at the gap between two adjacent battery modules 3, meanwhile, each battery module 3 is provided with a liquid fire extinguishing joint (not shown in the figure), the liquid fire extinguishing joint is connected to the liquid inlet pipe 13 through a first communicating pipe (not shown in the figure), an external liquid source can be uniformly sprayed onto the surface and inside of the battery module 3, so as to achieve full coverage of the liquid fire extinguishing apparatus 1 in the main body 100, and meanwhile, the generated fire-fighting waste liquid is connected by pipeline connection through the liquid discharge pipe 5; therefore, in the energy storage device, if the fire fighting space is narrow, the liquid fire extinguishing device 1 provided by the embodiment of the utility model can be correspondingly used, and has the advantages of reasonable overall structure, high space utilization rate, high efficiency, environmental protection and wide application range.

Preferably, in further preferred embodiments, the gas fire extinguishing device 2 comprises a fire extinguishing agent storage bottle 21, a fire extinguishing agent transportation pipeline 23 and a spray head 24 for spraying gas to the battery module 3; be equipped with admission valve 22 on fire extinguishing agent storage bottle 21, the one end of fire extinguishing agent transport pipeline 23 is connected with fire extinguishing agent storage bottle 21, the other end is connected with shower nozzle 24, further preferably, fire extinguishing agent transport pipeline 23 includes trunk line 231 and at least one branch trachea 232 with trunk line 231 intercommunication, as shown in fig. 1, branch trachea 232 establishes to two, the one end and the trunk line 231 intercommunication of two branch tracheas 232, the other end all is equipped with shower nozzle 24, two shower nozzles 24 set up relatively and are located battery module 3's top, therefore, the blowout of fire extinguishing agent from body 100 upper portion, from top to bottom flooding body 100, make gaseous extinguishing device 2's structural layout more reasonable, improve the fire extinguishing effect.

Preferably, in other preferred embodiments, each battery module 3 is provided with a gas fire extinguishing joint (not shown in the figures), and the gas fire extinguishing joint is connected with the fire extinguishing agent conveying pipeline 23 through a second communicating pipe (not shown in the figures) so as to extinguish the fire of the gas inside the battery module 3; specifically, by providing the gas fire extinguishing joint on the battery module 3, the fire extinguishing agent can be delivered to the inside of the battery module 3, thereby efficiently extinguishing the fire.

In addition, it should be noted that the fire extinguishing agent storage bottle 21 is used for filling and storing the fire extinguishing agent, and its size is determined according to the kind and amount of the fire extinguishing agent. In the embodiment of the utility model, the extinguishing agent is selected from high-efficiency gas extinguishing agents, such as clean gases of heptafluoropropane, perfluorohexanone and the like. The amount of fire suppressant stored in the fire suppressant storage bottle 21 is such that the minimum amount of fire suppressant required for a flooded fire suppression mode is satisfied. The calculation of the fire extinguishing agent dosage should comprehensively consider the volume of the energy storage device and the fire extinguishing design concentration. According to national standard specifications and research results, when heptafluoropropane is used as a fire extinguishing agent, the fire extinguishing design concentration is preferably 8% -10%; when the perfluorohexanone is used as a fire extinguishing agent, the designed concentration for fire extinguishing is preferably 4-6%.

Preferably, in other preferred embodiments, as shown in fig. 2, the detection module includes a gas detector 40, a temperature detector 50, a battery thermal runaway detector 60 and a smoke detector 70 electrically connected to the controller 30, and the safety monitoring capability of the energy storage device can be further improved by combining multiple detectors; the detection module is arranged in the body 100 to transmit the monitored fire signal in the body 100 to the controller 30; further, according to the size of the internal space of the body 100, the number of each detector can be set to one or more, so that the detection range of each detector can effectively cover the internal space of the body 100, and the fire signal in the body 100 can be monitored in time. For example, in cuboid body 100, gas detector 40 can be provided with 5, is located four angles and the intermediate position of cuboid body 100 respectively, and gas detector 40's detection range can effectively cover body 100 inner space, comes in time to detect the change condition of combustible gas concentration and VOC concentration in the body 100 for fire extinguishing system can in time deal with the control disaster. It is understood that the arrangement of the gas detector 40 may also be other structures, for example, two ends of the rectangular parallelepiped structural body 100 are oppositely arranged or arranged on the same side, and the like, only the detection range of the gas detector 40 needs to be ensured to effectively cover the inner space of the body 100.

It should be noted that, when a fire occurs in the main body 100, thermal runaway of the battery may occur, and temperature information and/or voltage information of the battery may be abnormal, so that the battery thermal runaway detector 60 is disposed inside the battery cells in the battery module 3, thereby detecting battery thermal runaway data such as a battery temperature rise rate, a battery internal temperature, a battery voltage drop rate, and a temperature difference between adjacent batteries; simultaneously, electric core can release a large amount of combustible gas and Volatile Organic Compounds (VOC) when battery thermal runaway, therefore gas detector 40 is combustible gas detector (not shown in the figure) and VOC detector (not shown in the figure) to combustible gas concentration and VOC concentration in the monitoring body 100.

In case of fire, a large amount of smoke is generated in the body 100, and it is preferable that in other preferred embodiments, the top of the body 100 is provided with an exhaust port (not shown) communicating with the outside, and the exhaust port is provided with an exhaust device 9 (not shown) electrically connected to the controller 30, in consideration of upward diffusion of the smoke; when the combustible gas concentration detected by the combustible gas detector 40 is greater than or equal to the preset value in the controller 30, the controller 30 controls to open the exhaust device 9 so as to reduce the concentration of the combustible gas in the body 100, thereby reducing the probability of fire; preferably, the exhaust device 9 may be an exhaust fan, or any other device capable of exhausting air.

In order to meet a certain IP level and ensure that the battery module 3 is in a constant temperature and humidity environment, the energy storage device requires a relatively closed space, when a large amount of smoke is continuously generated in the body 100, the internal pressure of the body 100 rises, and in order to adjust the internal pressure of the body 100, preferably, a pressure relief port (not shown in the figure) communicated with the outside is further formed in the top of the body 100, and the pressure relief port is provided with a pressure relief valve 7 (not shown in the figure); wherein, be equipped with pressure sensor (not shown in the figure) in the body 100, pressure sensor is connected with system controller 30 electricity, pressure sensor is used for detecting the body 100 internal pressure, when the pressure in the body 100 that pressure sensor detected exceeded the pressure threshold value, pressure sensor transmits the body 100 internal pressure signal to system controller 30, control relief valve 7 opens, the body 100 internal gas/smog passes through relief valve 7 and discharges outside the body 100 to prevent that the body 100 internal pressure from lasting the rise, avoid the potential safety hazard that the body 100 internal pressure too high brought. Further, the pressure threshold is 100 pa.

Preferably, in other preferred embodiments, the body 100 further includes an alarm device 8 (not shown), the alarm device 8 is electrically connected to the controller 30, when a fire occurs, the detection module detects a fire signal and transmits the fire signal to the controller 30, and the controller 30 controls the alarm device 8 to issue a fire early warning to prompt that a fire occurs in the body 100, so that twenty-four hours of uninterrupted fire safety early warning protection for the body 100 can be realized, and preferably, the alarm device 8 may be an audible and visual alarm.

As shown in fig. 3, the present embodiment provides a method for controlling an energy storage device, including the following steps:

s100, acquiring fire occurrence information;

and S200, comparing the fire occurrence information with a fire occurrence threshold value to judge whether a gas fire extinguishing device and/or a liquid fire extinguishing device is/are started to extinguish the fire of the battery module.

Specifically, the method comprises the following steps: the detection module that this embodiment provided adopts the detector of different grade type, survey body internal gas concentration data respectively, smog concentration data and battery thermal runaway data, the conflagration full cycle monitoring function has, each detector sets up inside body 100, through the combustible gas detector, the VOC detector, the smog detector, temperature detect ware and battery thermal runaway detector monitor body 100 internal state jointly, in time, accurately acquire body 100 internal fire emergence information, and with fire emergence information upload to controller 30, controller 30 judges whether start gas extinguishing device 2 and/or liquid extinguishing device 1 in order to put out a fire to battery module 3.

Further, the control method of the energy storage device further comprises the following steps:

acquiring gas concentration data within the body 100;

when at least one of the VOC concentration data in the body 100 is larger than or equal to the threshold corresponding to the data, or when at least one of the combustible gas concentration data is larger than or equal to the threshold corresponding to the data, the alarm device 8 on the body 100 and the exhaust device 9 on the exhaust pipe are started.

Specifically, the method comprises the following steps: when the battery unit is out of control due to heat, the battery core can release a large amount of combustible gas and VOC, if the acquired value obtained by at least one of the VOC detector and the combustible gas detector is greater than or equal to the threshold value corresponding to the data, it is determined that fire-fighting hidden danger exists in the body 100, at this time, the controller 30 controls the alarm device 8 and the exhaust device 9 on the exhaust pipe to work, and executes other protection works, for example, the water-cooled air conditioner in the body 100 stops working, the battery energy storage system stops running and other protection works.

The step of comparing the fire occurrence information with the fire occurrence threshold value to determine whether to activate the gas fire extinguishing device 2 and/or the liquid fire extinguishing device 1 to extinguish the fire of the battery module 3 includes:

when at least two of the gas concentration data, the smoke concentration data and the battery thermal runaway data in the body 100 reach the fire occurrence threshold, the air inlet valve 22 on the gas fire extinguishing device 2 is opened to perform gas fire extinguishing on the battery module 3, the exhaust device 9 on the exhaust pipe is closed at the same time, after the preset time, the exhaust device 9 on the exhaust pipe is restarted, and the liquid inlet valve 12 and the liquid discharge valve on the liquid discharge pipe on the liquid fire extinguishing device 1 are simultaneously opened to perform liquid fire extinguishing on the battery module 3.

Specifically, the method comprises the following steps: when fire occurs in the body 100, a large amount of gas and smoke can be generated in the body 100, the thermal runaway data of the battery can be abnormal, and when at least one data in the gas concentration data in the body is larger than or equal to the threshold corresponding to the data; or the smoke concentration in the body 100 is greater than or equal to a preset value; or the internal temperature of the battery is greater than or equal to a temperature threshold value, the battery temperature difference between two adjacent battery modules is greater than or equal to a temperature difference threshold value, or the battery temperature rise speed is greater than or equal to a temperature rise threshold value, or the battery voltage is greater than or equal to a voltage threshold value and the battery voltage drop is greater than or equal to a voltage drop threshold value; when at least two of the gas concentration data, the smoke concentration data and the battery thermal runaway data reach the fire occurrence threshold, starting the gas fire extinguishing device 2, and simultaneously closing the exhaust device 9 in a linkage manner to prevent the exhaust device 9 from influencing the gas fire extinguishing effect, preferably, stopping all devices influencing the gas fire extinguishing effect; the admission valve 22 on the fire extinguishing agent storage bottle 21 is opened in control ware 30 control, and the fire extinguishing agent is put out a fire to battery module 3 through fire extinguishing agent pipeline, shower nozzle 24, realizes accurate high efficiency, full coverage spray through the relative shower nozzle 24 that sets up in battery module 3 top, realizes putting out a fire fast.

After the fire extinguishing agent is sprayed, the fire extinguishing agent is continuously impregnated in the body 100, so that the purpose of completely extinguishing fire is achieved. However, for the battery fire in the energy storage device, due to the difference of the types of the batteries, after a part of the batteries are subjected to fire, the batteries belong to electrochemical fire, the fire-starting factors are complex, the fire is difficult to be effectively controlled, and the combustible gas can be released to continue to react to generate the re-combustion phenomenon. Preferably, after the fire extinguishing agent is continuously immersed in the body 100 for a preset time, the exhaust device 9 is restarted to discharge combustible gas out of the body 100, thereby effectively preventing the fire from reigniting; simultaneously, the liquid fire extinguishing device 1 and the liquid discharge valve 6 on the liquid discharge pipe 5 are opened in a linkage manner, the liquid fire extinguishing device 1 is externally connected with an external water source interface, the liquid inlet valve 12 on the liquid inlet pipe 13 in the liquid fire extinguishing device 1 is opened, and an external water source is sprayed to the surface of the battery module 3 from the liquid outlet 16, so that the liquid fire extinguishing device 1 extinguishes the interior of the body 100 again, the temperature of the battery module 3 can be reduced, the battery thermal runaway is prevented from continuing to occur, and the reburning is prevented; meanwhile, the drain valve 6 on the drain pipe 5 is opened, so that the fire-fighting wastewater can be uniformly discharged through the drain pipe 5 in an organized manner, and the system is economical and environment-friendly.

It can be understood that, be provided with the battery unit in the battery module 3, battery module 3 can regard as minimum protection unit, sets up a plurality of battery thermal runaway detector 60 in the battery unit, real-time supervision battery thermal runaway data, and battery thermal runaway data includes battery programming rate, the inside temperature of battery, voltage drop rate and adjacent battery difference in temperature.

It can be understood that the air valve in this embodiment can be an electromagnetic valve, and the opening and closing of the air valve can be controlled electrically, so that the operation is more flexible and convenient.

In summary, the present embodiment provides an energy storage device and a control method thereof, the energy storage device mainly comprises a body 100, and a gas fire extinguishing apparatus 2, a liquid fire extinguishing apparatus 1, a detection module and a controller 30 installed in the body 100, wherein a plurality of battery modules 3 are installed in the body 100, and the plurality of battery modules 3 are sequentially and parallelly installed in the body 100; liquid extinguishing device 1 includes feed liquor pipe 13 and a plurality of lateral conduit 15 that communicate with feed liquor pipe 13, each lateral conduit 15 locates battery module 3's periphery and perpendicular to battery module 3 setting respectively, each corner in body 100 is located to lateral conduit 15 among this liquid extinguishing device 1, be long and thin tubulose structure, the structure rule, small, occupation space is little, and simultaneously, the interval is equipped with a plurality of liquid outlets 16 on each lateral conduit 15, each liquid outlet 16 just is located two adjacent battery module 3's clearance department towards battery module 3, and simultaneously, be equipped with the liquid joint of putting out a fire on the battery module, the feed liquor pipe is connected through first connecting pipe to the liquid joint of putting out a fire, outside water source can be evenly acted on to battery module 3's upper surface, lower surface and inside, realize the full coverage of the liquid fire extinguishing system in body 100.

Further, the gas fire extinguishing apparatus 2 includes a fire extinguishing agent storage bottle 21, a fire extinguishing agent transportation pipeline 23, and a spray head 24 for spraying gas to the battery module 3; be equipped with admission valve 22 on fire extinguishing agent storage bottle 21, the one end of fire extinguishing agent transport pipeline 23 is connected with fire extinguishing agent storage bottle 21, the other end is connected with shower nozzle 24, fire extinguishing agent transport pipeline 23 includes trunk line 231 and two relative settings with the branch trachea 232 of trunk line 231 intercommunication, the one end and the trunk line 231 intercommunication of two branch trachea 232, the other end all is equipped with shower nozzle 24, two shower nozzle 24 set up relatively and are located battery module 3's top, from this, the fire extinguishing agent is from the blowout of 100 upper portions of body, from top to bottom flooding body 100, and simultaneously, be equipped with gaseous fire extinguishing joint on battery module 3, gaseous fire extinguishing joint is through second communicating pipe connection fire extinguishing agent transport pipeline 23, with right the inside gaseous fire extinguishing that carries on of battery module 3 for gaseous structural configuration who puts out a fire is more reasonable, improve the fire extinguishing effect.

Meanwhile, the gas fire extinguishing device 2, the liquid fire extinguishing device 1 and the detection module are respectively and electrically connected with the controller 30, the detection module comprises a gas detector 40, a temperature detector 50, a battery thermal runaway detector 60 and a smoke detector 70 which are electrically connected with the controller 30, by acquiring fire occurrence information (gas concentration data, battery thermal runaway data and smoke concentration data) and setting up a combination judgment logic, the fire occurrence information is compared with a fire occurrence threshold value to judge whether to start the gas fire extinguishing device 2 and/or the liquid fire extinguishing device 1 to extinguish the fire of the battery module 3, the energy storage device and the control method thereof adopt the combination of early stage gas fire extinguishing and later stage liquid fire extinguishing, are safe and reliable, can detect in real time, extinguish the fire actively and prevent re-ignition, improve the fire control capability of an energy storage fire-fighting system, and effectively increase the safety factor of the energy storage device, meanwhile, the structure is simple, and the market promotion is convenient.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (10)

1. An energy storage device, comprising: the fire extinguishing device comprises a body, and a liquid fire extinguishing device, a gas fire extinguishing device, a detection module and a controller which are arranged in the body;

a plurality of battery modules are arranged in the body;

the liquid fire extinguishing device comprises a liquid inlet pipe and at least one branch pipeline communicated with the liquid inlet pipe, each branch pipeline is arranged on the periphery of the battery module, a plurality of liquid outlets are arranged on each branch pipeline at intervals, and each liquid outlet faces the battery module;

the liquid fire extinguishing device, the gas fire extinguishing device and the detection module are respectively electrically connected with the controller.

2. The energy storage device of claim 1, wherein: the plurality of battery modules are sequentially arranged in the body in parallel, and each branch pipeline is respectively perpendicular to the battery modules;

the liquid outlet is arranged between every two adjacent battery modules.

3. The energy storage device according to claim 1 or 2, characterized in that: the branch pipes are provided in plurality along the circumferential direction of the battery module.

4. The energy storage device of claim 1, wherein: the body is provided with a liquid inlet, the liquid inlet is connected with the liquid inlet pipe, and the liquid inlet pipe is provided with a liquid inlet valve;

the bottom of the body is provided with a liquid outlet, the liquid outlet is connected with a liquid discharge pipe, and the liquid discharge pipe is provided with a liquid discharge valve.

5. The energy storage device according to claim 1 or 2, characterized in that: the gas fire extinguishing device comprises a fire extinguishing agent storage bottle, a fire extinguishing agent conveying pipeline and a spray head for spraying gas to the battery module;

one end of the fire extinguishing agent conveying pipeline is connected with the fire extinguishing agent storage bottle, and the other end of the fire extinguishing agent conveying pipeline is connected with the spray head;

and an air inlet valve is arranged on the fire extinguishing agent storage bottle.

6. The energy storage device of claim 5, wherein: the fire extinguishing agent conveying pipeline comprises a main pipeline and at least one branch air pipe communicated with the main pipeline;

one end of each branch air pipe is communicated with the main pipeline, and the other end of each branch air pipe is provided with the spray head;

each shower nozzle all locates in the this body, and be located battery module's top.

7. The energy storage device of claim 5, wherein: each battery module is provided with a liquid fire extinguishing joint and/or a gas fire extinguishing joint communicated with the interior of the battery module, and each liquid fire extinguishing joint is connected with the liquid inlet pipe through a first communication pipe so as to extinguish liquid fire in each battery module;

each gas fire extinguishing joint is connected with the fire extinguishing agent conveying pipeline through a second communicating pipe so as to extinguish gas inside each battery module.

8. The energy storage device according to claim 1 or 2, characterized in that: the detection module comprises a gas detector, a temperature detector, a battery thermal runaway detector and a smoke detector which are electrically connected with the controller;

the gas detector is a combustible gas detector and/or a VOC (volatile organic compound) detector, and the battery thermal runaway detector is arranged inside the battery module.

9. The energy storage device according to claim 1 or 2, characterized in that: the upper part of the body is provided with a pressure relief port and an exhaust port which are communicated with the outside, and the pressure relief port is provided with a pressure relief valve; and the exhaust port is provided with an exhaust device electrically connected with the controller.

10. The energy storage device according to claim 1 or 2, characterized in that: the body further comprises an alarm device, and the alarm device is electrically connected with the controller.

Images