CN114053632A - Energy storage device and control method thereof - Google Patents

Abstract

The invention relates to the technical field of energy storage equipment safety, and discloses an energy storage device and a control method thereof, wherein the energy storage 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; 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; energy memory control method is through acquireing conflagration emergence information, compares conflagration emergence information with conflagration emergence threshold value to whether judge and start gaseous extinguishing device and liquid extinguishing device in order to put out a fire to battery module, adopt gaseous fire extinguishing in earlier stage and later stage liquid to put out a fire and combine together, can high-efficient put out a fire, prevent after combustion, simple structure, improve the fire control ability of body.

Description

Energy storage device and control method thereof

Technical Field

The invention relates to the technical field of energy storage equipment safety, in particular to an energy storage device and a control method thereof.

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 cabinet type energy storage system usually adopts a container as an outer enclosure structure, and energy storage batteries, a support, air conditioning ventilation and other auxiliary devices are prefabricated into a whole, so that the cabinet type 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 water fire extinguishing system can adopt a water spraying fire extinguishing mode, a manual water spraying standard interface is reserved outside an energy storage cabinet body, the manual water spraying standard interface is manually communicated with an external fire fighting water source (an outdoor fire hydrant, a fire truck and the like) in case of fire, and then a water supply system is started to extinguish the fire. Although the scheme is high in reliability, people close to the energy storage cabinet to open the water fire-fighting interface on the cabinet body has higher safety risk.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide an energy storage device and a control method thereof.

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 gas fire extinguishing device, a liquid 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 gas fire extinguishing device, the liquid 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, the branch pipes are arranged along the circumferential direction of the battery modules, and each branch pipe is respectively arranged perpendicular to the battery modules;

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

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, 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;

the fire extinguishing agent conveying pipeline comprises a main pipeline and at least one branch gas pipe connected to the main pipeline, one end of each branch gas pipe is connected with the main pipeline, and the other end of each branch gas pipe is connected with the spray head; each spray head is positioned above the battery module.

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

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

the battery thermal runaway detector is disposed inside a battery cell in the battery module.

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

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

The invention also provides a control method of the energy storage device, which comprises the following steps:

acquiring fire occurrence information;

comparing the fire occurrence information with a fire occurrence threshold to determine whether to activate a gas fire extinguishing apparatus and/or a liquid fire extinguishing apparatus to extinguish a fire of the battery module.

Preferably, the first and second electrodes are formed of a metal,

further comprising the steps of:

acquiring gas concentration data in the body;

wherein the gas concentration data within the body includes voc concentration data and combustible gas concentration data;

and when at least one of the voc concentration data in the body is larger than or equal to a threshold value corresponding to the data, or when at least one of the combustible gas concentration data is larger than or equal to a threshold value corresponding to the data, starting an alarm device on the body and an exhaust device on an exhaust pipe.

Preferably, the first and second electrodes are formed of a metal,

the fire occurrence information comprises gas concentration data, smoke concentration data and battery thermal runaway data in the body, wherein the battery thermal runaway data comprise battery internal temperature, battery heating speed, battery voltage drop and battery temperature difference of two adjacent battery modules;

the comparing the fire occurrence information with a fire occurrence threshold to determine whether to activate a gas fire extinguishing apparatus and/or a liquid fire extinguishing apparatus to extinguish a fire of the battery module includes:

when at least two of the gas concentration data, the smoke concentration data and the battery thermal runaway data in the battery body reach the fire occurrence threshold value, an air inlet valve on the gas fire extinguishing device is opened to carry out gas fire extinguishing on the battery module, an exhaust device on the exhaust pipe is closed at the same time, after the preset time, the exhaust device on the exhaust pipe is restarted, and a liquid inlet valve on the liquid fire extinguishing device and a liquid discharge valve on the liquid discharge pipe are simultaneously opened to carry out liquid fire extinguishing on the battery module.

Preferably, the first and second electrodes are formed of a metal,

the gas concentration data in the body reaching the fire occurrence threshold includes at least one of the gas concentration data in the body being greater than or equal to a threshold value corresponding to the data;

the smoke concentration data in the body reaching the fire occurrence threshold value includes the smoke concentration in the body being greater than or equal to a preset value;

when the thermal runaway data of the battery reaches the fire occurrence threshold, the following two conditions need to be met:

a. the internal temperature of the battery is greater than or equal to a temperature threshold value, and the battery temperature difference between the two adjacent battery modules is greater than or equal to a temperature difference threshold value;

b. the temperature rise speed of the battery is greater than or equal to a temperature rise threshold value;

c. the battery voltage is greater than or equal to a voltage threshold and the battery voltage drop is greater than or equal to a voltage drop threshold.

The invention provides an energy storage device and a control method thereof, compared with the prior art, the energy storage device has the following beneficial effects:

the invention 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; the liquid fire extinguishing device comprises a liquid inlet pipe and a plurality of branch pipes communicated with the liquid inlet pipe, each branch pipe is arranged at the periphery of a battery module and is respectively perpendicular to the battery module, the branch pipes in the liquid fire extinguishing device are arranged at each corner in the body and are of a long and thin tubular structure, the structure is regular, the size is small, the occupied space is small, a plurality of liquid outlets are arranged on each branch pipe at intervals, each liquid outlet faces the battery module and is positioned at the gap between every two adjacent battery modules, in addition, a liquid fire extinguishing joint is arranged on each battery module and is connected with the liquid inlet pipe through a first communication pipe, therefore, an external water source can uniformly act on the upper surface, the lower surface and/or the interior of each battery module, and the full coverage of the liquid fire extinguishing system in the body is realized;

gaseous extinguishing device will extinguish fire agent from body upper portion blowout, from top to bottom flooding body, in addition, be equipped with gaseous fire extinguishing joint on the battery module, gaseous fire extinguishing joint is connected fire extinguishing agent through the second and is transported the pipeline, in order to right battery module surface and/or inside carry out gaseous extinguishing fire for gaseous extinguishing device's structural layout is more reasonable, and effectively improves the fire control effect.

Further, gaseous extinguishing device, liquid extinguishing device, detection module is connected with the controller electricity respectively, acquire conflagration emergence information and convey to the controller through detection module, compare conflagration emergence information and conflagration emergence threshold value, whether start gaseous extinguishing device and liquid extinguishing device in order to put out a fire to battery module with the judgement, and carry out other protection actions, this energy memory and control method adopt gaseous in earlier stage to put out a fire and later stage liquid put out a fire and combine together, its safe and reliable, real-time detection, initiatively put out a fire, prevent the after combustion, energy storage fire extinguishing system's fire control ability has been improved, energy memory's factor of safety has effectively been increased, moreover, the steam generator is simple in structure, 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 invention;

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

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

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, of a nitrogen-containing gas; 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 a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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," "horizontal," "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 and parallelly arranged 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 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 15 can be 6mm, and a plurality of liquid outlets 16 correspond the clearance department of locating two adjacent battery module 3 for evenly spray the upper surface, the lower surface to battery module 3 with outside water source, in order to put out a fire and cool down battery module 3.

Preferably, in other preferred embodiments, be equipped with inlet 11 on the body 100, inlet 11 department connects liquid extinguishing device 1's feed liquor pipe 13, be equipped with feed liquor valve 12 on the feed liquor pipe 13, and simultaneously, be provided with outside water source interface on the feed liquor pipe 13, when needing to carry out liquid to body 100 and put out a fire, open feed liquor valve 12, outside water source loops through feed liquor valve 12, feed liquor pipe 13, communicating pipe 14, branch pipeline 15, liquid outlet 16 evenly sprays on battery module 3, so that liquid extinguishing device 1 high-efficiently accomplishes putting out a fire, cooling work in to body 100, need not manual fire extinguishing.

Preferably, in other preferred embodiments, each battery module 3 is provided with a liquid fire extinguishing joint (not shown in the figures), and each 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 stretch to battery module 3 inside, 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 wastewater, 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 wastewater is generated in the body 100, at the moment, the liquid discharge valve 6 is synchronously opened, and the fire-fighting wastewater is discharged out of the body 100 through the liquid discharge pipe 5 and the liquid discharge valve 6, so that the fire-fighting wastewater can be organically guided through a pipeline for discharge, 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, a regular structure, a small volume, and a 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 a 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 water source can be uniformly sprayed onto the surface and/or inside of the battery module 3, so as to achieve full coverage of liquid fire extinguishing of the battery module 3, 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 invention 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 delivery line 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 invention, 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 of 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 the detectors may be one or more, and the detectors may be disposed outside the battery module and/or inside the battery module, so that the detection range of the detectors can effectively cover the internal space of the body 100, thereby monitoring the fire signal in the body 100 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 body 100 interior gas concentration 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 occurs, and abnormality occurs in temperature information and/or voltage information of the battery, and therefore, the battery thermal runaway detector 60 is disposed inside the battery unit in the battery module 3, so as to detect battery thermal runaway data such as a battery temperature increase rate, a battery internal temperature, a battery voltage decrease rate, and a temperature difference between adjacent batteries; meanwhile, when the battery is out of control due to heat, the battery core releases a large amount of combustible gas and Volatile Organic Compounds (VOCs), so that the gas detector 40 is a combustible gas detector (not shown in the figure) and a VOC detector (not shown in the figure), and the concentration of the combustible gas and the concentration of the VOCs in the body 100 are monitored.

In case of fire, a large amount of smoke is generated in the body 100, and in consideration of the upward diffusion of the smoke, 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, the exhaust port being provided with an exhaust device 9 electrically connected to the controller 30; 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, 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 send out 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, an embodiment of the present invention 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 provided by the embodiment of the invention adopts different types of detectors to respectively detect gas concentration data, smoke concentration data and battery thermal runaway data in the body, has a fire full-cycle monitoring function, each detector is arranged in the body 100, the internal state of the body 100 is monitored through the combustible gas detector, the VOC detector, the smoke detector, the temperature detector and the battery thermal runaway detector together, the fire occurrence information in the body 100 is timely and accurately acquired, the fire occurrence information is uploaded to the controller 30, and the controller 30 judges whether to start the gas fire extinguishing device 2 and/or the liquid fire extinguishing device 1 to extinguish a fire of the 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 apparatus 2 and/or the liquid fire extinguishing apparatus 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 a fire occurs in the body 100, a large amount of gas and smoke can be generated in the body 100, the battery thermal runaway data can be abnormal, and 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 fire is determined to occur; 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, and 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.

Preferably, the gas concentration data in the body 100 reaching the fire occurrence threshold includes at least one of the gas concentration data in the body 100 being greater than or equal to a threshold value to which the data corresponds; the smoke concentration data in the body 100 reaching the fire occurrence threshold includes the smoke concentration in the body 100 being greater than or equal to a preset value; when the thermal runaway data of the battery reaches the fire occurrence threshold, the following two conditions need to be met: a. the internal temperature of the battery is greater than or equal to a temperature threshold value, and the battery temperature difference between the two adjacent battery modules is greater than or equal to a temperature difference threshold value; b. the temperature rise speed of the battery is greater than or equal to a temperature rise threshold value; c. the battery voltage is greater than or equal to a voltage threshold and the battery voltage drop is greater than or equal to a voltage drop threshold.

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 flowing back valve 6 on chain opening liquid extinguishing device 1 and the fluid-discharge tube 5, the external outside water source interface of liquid extinguishing device 1, open the feed liquor valve 12 on the feed liquor pipe 13 in the liquid extinguishing device 1, outside water source sprays to the surface of battery module 3 from liquid outlet 16, therefore, liquid extinguishing device 1 puts out a fire once more to the body 100 in, can reduce battery module 3's temperature simultaneously, prevent that the battery thermal runaway from continuing to take place, prevent the after combustion, meanwhile, flowing back valve 6 on the fluid-discharge tube 5 is opened, fire control waste water can organize and discharge through the unified fluid-discharge tube 5, economy and environmental protection.

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.

To sum up, the embodiment of the invention provides an energy storage device and a control method thereof, the energy storage device mainly comprises a body 100, and a gas fire extinguishing device 2, a liquid fire extinguishing device 1, a detection module and a controller 30 which are arranged in the body 100, wherein a plurality of battery modules 3 are arranged in the body 100, and the plurality of battery modules 3 are sequentially arranged in the body 100 in parallel; 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 is located battery module 3's periphery and is 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, and is 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, furthermore, be equipped with the liquid joint of putting out a fire on the battery module, the liquid pipe is connected through first communicating pipe to the liquid joint of putting out a fire, therefore, outside water source can be evenly acted on to battery module 3's surface and/or inside, realize body 100 in the liquid fire extinguishing system's full coverage.

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 from the blowout of 100 upper portions of body, from top to bottom flooding body 100, furtherly, 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, it is right to carry out gaseous fire extinguishing in battery module 3 is inside, make the structural configuration that gaseous put out a fire more rationally, 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 (11)

1. 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;

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 gas fire extinguishing device, the liquid 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, the branch pipelines are arranged along the circumferential direction of the battery modules, 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 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.

4. 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, 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;

the fire extinguishing agent conveying pipeline comprises a main pipeline and at least one branch gas pipe connected to the main pipeline, one end of each branch gas pipe is connected with the main pipeline, and the other end of each branch gas pipe is connected with the spray head; each spray head is positioned above the battery module.

5. The energy storage device of claim 4, wherein: each battery module is provided with a liquid fire extinguishing joint and/or a gas fire extinguishing joint, and each liquid fire extinguishing joint is connected with the liquid inlet pipe through a plurality of first communication pipes so as to extinguish liquid fire inside each battery module;

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

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

the battery thermal runaway detector is disposed inside a battery cell in the battery module.

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

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

8. A control method of an energy storage device according to any one of claims 1 to 7, comprising:

acquiring fire occurrence information;

comparing the fire occurrence information with a fire occurrence threshold to determine whether to activate a gas fire extinguishing apparatus and/or a liquid fire extinguishing apparatus to extinguish a fire of the battery module.

9. The method of controlling an energy storage device according to claim 8, characterized in that:

further comprising the steps of:

acquiring gas concentration data in the body;

wherein the gas concentration data within the body includes voc concentration data and combustible gas concentration data;

and when at least one of the voc concentration data in the body is larger than or equal to a threshold value corresponding to the data, or when at least one of the combustible gas concentration data is larger than or equal to a threshold value corresponding to the data, starting an alarm device on the body and an exhaust device on an exhaust pipe.

10. The control method of an energy storage device according to claim 8 or 9, characterized in that:

the fire occurrence information comprises gas concentration data, smoke concentration data and battery thermal runaway data in the body, wherein the battery thermal runaway data comprise battery internal temperature, battery heating speed, battery voltage drop and battery temperature difference of two adjacent battery modules;

the comparing the fire occurrence information with a fire occurrence threshold to determine whether to activate a gas fire extinguishing apparatus and/or a liquid fire extinguishing apparatus to extinguish a fire of the battery module includes:

when at least two of the gas concentration data, the smoke concentration data and the battery thermal runaway data in the battery body reach the fire occurrence threshold value, an air inlet valve on the gas fire extinguishing device is opened to carry out gas fire extinguishing on the battery module, an exhaust device on the exhaust pipe is closed at the same time, after the preset time, the exhaust device on the exhaust pipe is restarted, and a liquid inlet valve on the liquid fire extinguishing device and a liquid discharge valve on the liquid discharge pipe are simultaneously opened to carry out liquid fire extinguishing on the battery module.

11. The method according to claim 10, wherein the reaching of the fire occurrence threshold by the gas concentration data in the body requires that at least one of the gas concentration data in the body is greater than or equal to a threshold corresponding to the data;

the smoke concentration data in the body reaches the fire occurrence threshold value and the smoke concentration in the body is required to be greater than or equal to a preset value;

when the thermal runaway data of the battery reaches the fire occurrence threshold, the following two conditions need to be met:

a. the internal temperature of the battery is greater than or equal to a temperature threshold value, and the battery temperature difference between the two adjacent battery modules is greater than or equal to a temperature difference threshold value;

b. the temperature rise speed of the battery is greater than or equal to a temperature rise threshold value;

c. the battery voltage is greater than or equal to a voltage threshold and the battery voltage drop is greater than or equal to a voltage drop threshold.

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