CN111467714A - Method and system for extinguishing fire of electrochemical energy storage system - Google Patents
Method and system for extinguishing fire of electrochemical energy storage system Download PDFInfo
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- CN111467714A CN111467714A CN202010211717.6A CN202010211717A CN111467714A CN 111467714 A CN111467714 A CN 111467714A CN 202010211717 A CN202010211717 A CN 202010211717A CN 111467714 A CN111467714 A CN 111467714A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/36—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
- A62C37/38—Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a method and a system for extinguishing fire of an electrochemical energy storage system, wherein the method comprises the following steps: monitoring the temperature and the smoke concentration in the battery module to obtain real-time battery temperature data and smoke concentration data in the battery module; when the battery temperature data exceeds a preset battery temperature threshold or the smoke concentration data of the battery module exceeds a preset smoke concentration threshold, continuously sending first alarm information to a control system; through control system continuously receives first alarm information, when the time that continuously receives reaches the first warning duration of predetermineeing, through control system starts the liquid unit of putting out a fire, right battery module puts out a fire and handles.
Description
Technical Field
The invention relates to the technical field of electrochemical energy storage systems, in particular to a method and a system for extinguishing fire of an electrochemical energy storage system.
Background
At present, the accumulated loading capacity of electrochemical energy storage in China is steadily increasing, the accumulated loading capacity of electrochemical energy storage is predicted to exceed 2.5GW by 2019, and the annual composite growth rate is close to 70%. The current common electrochemical energy storage system, such as a lithium ion battery energy storage system, has potential safety hazards, the use safety cannot be guaranteed essentially, and the fire fighting after the battery thermal runaway combustion is still a hot point problem. Research shows that the thermal runaway combustion of the battery is caused by the reaction of components such as a diaphragm, an electrolyte and the like at high temperature in the battery, and if the temperature of the battery is reduced for a long time during fire extinguishing, the fire can be extinguished fundamentally, the re-combustion of the battery is inhibited, and the fire extinguishing efficiency is effectively improved.
Current electrochemistry energy storage system's fire prevention strategy of putting out a fire all detects the gaseous back injection fire extinguishing agent of smog after the battery thermal runaway, the fire extinguishing agent is mostly gaseous fire extinguishing agents such as heptafluoropropane, and spray when fire extinguishing agent to whole energy storage system rather than to the ignition or to appearing thermal runaway battery module and spray, need a large amount of fire extinguishing agents so promptly, the fire extinguishing efficiency has been reduced again, let heat transfer very easily, initiate more extensive conflagration, and even open flame is suppressed in the energy storage system under the common situation, the phenomenon of reburning still can appear. This conventional fire strategy is too simple to guarantee battery safety.
In view of this, it is desirable to provide a more effective fire extinguishing strategy, which can extinguish the open fire of the energy storage system, and simultaneously perform fire extinguishing and temperature reduction treatment on the overheated battery module, suppress the occurrence of the after-fire situation after fire extinguishing, and improve the fire extinguishing efficiency.
Disclosure of Invention
The technical scheme of the invention provides a method and a system for extinguishing a fire of an electrochemical energy storage system, which can find the fire of the energy storage system in time and carry out efficient fire extinguishing and cooling treatment by adopting various monitoring means such as temperature sensing, smoke sensing and the like and adopting a fire extinguishing strategy of matching gas fire extinguishing and liquid fire extinguishing.
In order to solve the above problems, the present invention provides a method for fire extinguishing of an electrochemical energy storage system, the method comprising:
monitoring the temperature and the smoke concentration in the battery module to obtain real-time battery temperature data and smoke concentration data in the battery module;
when the battery temperature data exceeds a preset battery temperature threshold value, continuously sending first alarm information to a control system;
through control system continuously receives first alarm information, when the time that continuously receives reaches the first warning duration of predetermineeing, through control system starts the liquid unit of putting out a fire, right battery module puts out a fire and handles.
Preferably, the method further comprises the following steps:
monitoring the concentration of combustible gas and the concentration of smoke in the space of the battery compartment to obtain real-time concentration data of the combustible gas and the concentration data of the smoke in the battery compartment in the space of the battery compartment;
when the smoke concentration data in the battery module exceed a preset smoke concentration threshold value or the combustible gas concentration data in the battery compartment exceed a combustible gas concentration threshold value or the smoke concentration data in the battery compartment exceed a preset smoke concentration threshold value, continuously sending second alarm information to a control system;
through control system continuously receives second alarm information, when the time that continuously receives reaches predetermined second warning duration, through control system starts gaseous unit of putting out a fire, right the battery compartment is put out a fire and is handled.
Preferably, the method further comprises the following steps:
when the battery temperature data exceeds a preset battery temperature threshold and the smoke concentration data in the battery module exceeds a preset smoke concentration threshold, continuously sending third alarm information to a control system;
continuously receiving the third alarm information through the control system, and starting a liquid fire extinguishing unit through the control system to extinguish the fire of the battery module when the continuously received time reaches a preset third alarm duration; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
Preferably, the method further comprises the following steps:
when smoke concentration data in the battery module exceed a preset smoke concentration threshold or battery temperature data exceed a preset battery temperature threshold and the smoke concentration data of the battery compartment in the battery compartment space exceed the preset smoke concentration threshold, continuously sending fourth alarm information to a control system;
continuously receiving the fourth alarm information through the control system, and starting a liquid fire extinguishing unit through the control system to extinguish the fire of the battery module when the continuously received time reaches a preset fourth alarm duration; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment space.
Preferably, the method further comprises the following steps:
when the at least two battery temperature data exceed a preset battery temperature threshold or the smoke concentration data in the at least two battery modules exceed a preset smoke concentration threshold, continuously sending fifth alarm information to a control system;
continuously receiving the fifth alarm information through the control system, and starting a liquid fire extinguishing unit through the control system when the continuous receiving time reaches a preset fifth alarm duration to extinguish the fire of the first battery module sending the fifth alarm information; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
In accordance with another aspect of the present invention, there is provided a system for extinguishing a fire in an electrochemical energy storage system, the system comprising:
the monitoring unit is used for monitoring the temperature and the smoke concentration in the battery module to acquire real-time battery temperature data in the battery module and smoke concentration data in the battery module;
the early warning unit is used for continuously sending first warning information to a control system when the battery temperature data exceeds a preset battery temperature threshold;
and the execution unit is used for continuously receiving the first alarm information through the control system, starting the liquid fire extinguishing unit through the control system when the time of continuous reception reaches the preset first alarm duration, and then extinguishing the fire of the battery module.
Preferably, the method further comprises the following steps:
the monitoring unit is used for monitoring the combustible gas concentration and the smoke concentration of the battery compartment space to obtain real-time combustible gas concentration data and smoke concentration data of the battery compartment space;
the early warning unit is used for continuously sending second warning information to the control system when smoke concentration data in the battery module exceed a preset battery smoke concentration threshold or combustible gas concentration data in the battery compartment exceed a preset combustible gas concentration threshold or the smoke concentration data in the battery compartment exceed a preset smoke concentration threshold;
and the execution unit is used for continuously receiving the second alarm information through the control system, starting the gas fire extinguishing unit through the control system when the time of continuous receiving reaches the preset second alarm duration, and then carrying out fire extinguishing treatment on the battery compartment.
Preferably, the method further comprises the following steps:
the early warning unit is used for continuously sending third warning information to the control system when the battery temperature data exceeds a preset battery temperature threshold and the smoke concentration data in the battery module exceeds a preset smoke concentration threshold;
the execution unit is used for continuously receiving the third alarm information through the control system, and when the continuous receiving time reaches a preset third alarm duration, the liquid fire extinguishing unit is started through the control system to extinguish the fire of the battery module; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
Preferably, the method further comprises the following steps:
the early warning unit is used for continuously sending fourth warning information to the control system when smoke concentration data in the battery module exceed a preset smoke concentration threshold or battery temperature data exceed a preset battery temperature threshold and smoke concentration data of a battery compartment in the battery compartment space exceed a preset smoke concentration threshold;
the execution unit is used for continuously receiving the fourth alarm information through the control system, and when the continuously received time reaches a preset fourth alarm duration, the liquid fire extinguishing unit is started through the control system to extinguish the fire of the battery module; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment space.
Preferably, the method further comprises the following steps:
the early warning unit is used for continuously sending fifth warning information to the control system when at least two battery temperature data exceed a preset battery temperature threshold value or smoke concentration data in at least two battery modules exceed a preset smoke concentration threshold value;
the execution unit is used for continuously receiving the fifth alarm information through the control system, and when the continuous receiving time reaches a preset fifth alarm duration, the liquid fire extinguishing unit is started through the control system to extinguish the fire of the first battery module sending the fifth alarm information; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
The technical scheme of the invention provides a method for extinguishing an electrochemical energy storage system more economically and effectively, and reduces the loss caused by fire generated by a battery to the maximum extent.
Drawings
A more complete understanding of exemplary embodiments of the present invention may be had by reference to the following drawings in which:
FIG. 1 is a flow diagram of a method for extinguishing a fire in an electrochemical energy storage system, according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of an apparatus for an electrochemical energy storage system fire suppression strategy according to a preferred embodiment of the present invention;
FIG. 3 is a flow chart of the operation of a liquid fire suppression unit according to a preferred embodiment of the present invention;
FIG. 4 is a flow chart of the operation of a gas fire suppression unit according to a preferred embodiment of the present invention; and
fig. 5 is a block diagram of a system for extinguishing a fire in an electrochemical energy storage system, according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flow diagram of a method for extinguishing a fire in an electrochemical energy storage system, according to a preferred embodiment of the present invention. The application provides a fire extinguishing agent use strategy for electrochemistry energy storage system, through multiple monitoring means such as smoke sensation, thalposis, in time discovers the condition of a fire that energy storage system appears and puts out a fire to it and handle. As shown in fig. 2, the fire extinguishing strategy of the present application involves basic units comprising: battery systems, monitoring systems, control systems and fire suppression systems, and the interior space of the battery compartment in addition to these systems. The battery system in the application consists of a plurality of battery clusters, each battery cluster consists of a plurality of battery cabinets, each battery cabinet contains a plurality of battery modules, and each battery module is the minimum unit for protecting the fire extinguishing system. The monitoring system in this application comprises multiple detector and audible-visual annunciator. The detector mainly comprises a temperature detector, a smoke detector and a combustible gas detector. A temperature detector and a smoke detector are arranged in each battery module, and at least one smoke detector, a combustible gas detector and an audible and visual alarm are arranged in the inner space of the battery cabin. And the monitoring system can turn on the audible and visual alarm after collecting the information from the detector and feed the information back to the control system. The fire extinguishing system of the invention consists of a gas fire extinguishing unit and a liquid fire extinguishing unit. The main component of the gas fire extinguishing agent selected in the gas fire extinguishing unit is a fluoroalkyl substance which can effectively extinguish open fire, and the gas storage steel cylinder is connected with a spray head in the inner space of the battery cabin through a pipeline. The main component of the liquid fire extinguishing agent selected in the liquid fire extinguishing unit is fluorinated ketone substances, which can have the functions of extinguishing fire and reducing temperature; the liquid storage steel cylinder is connected with the spray head in each module through a pipeline. In a battery system, there is one spray head for spraying liquid fire suppressant in each module and at least one spray head for spraying gaseous fire suppressant in the space within the battery system. The fire extinguishing system should have the functions of automatic start, manual start and forced mechanical start at the same time.
In consideration of the possibility of false alarm of the detector, the monitoring system has the characteristic of delayed feedback, namely, the signal detected by the detector is continuously fed back to the control system after the signal exceeds the threshold value for a period of time, so that the false alarm rate is reduced. The delayed feedback time is preferably 10 seconds to 30 seconds.
The control system and the monitoring system are connected with the fire extinguishing system, the control system receives signals from the monitoring system, and the fire extinguishing system is controlled to carry out fire extinguishing operation by judging the signal source.
Considering that a fire in the electrochemical energy storage system is a battery fire caused by thermal runaway of a battery in a module or an electrical fire caused by short circuit and other reasons outside the module, the thermal runaway of the battery may only cause temperature rise and not cause a fire, and information obtained by a detector during detection may be: the temperature detector in the module sends out signals, the temperature detector and the smoke detector in the module send out signals simultaneously, any one of the smoke detector and the combustible gas detector in the internal space of the battery compartment sends out signals, and any one of the temperature detector and the smoke detector in the module and the smoke detector or the combustible gas detector in the space of the battery system sends out signals.
As shown in fig. 1, the present application provides a method for extinguishing a fire in an electrochemical energy storage system, the method comprising:
preferably, the temperature and smoke concentration in the battery module are monitored, and real-time battery temperature data and smoke concentration data in the battery module are obtained.
Preferably, when the battery temperature data exceeds a preset battery temperature threshold, the first alarm information is continuously sent to the control system. As shown in fig. 3.
Preferably, continuously receive first alarm information through control system, when the time of continuously receiving reaches the first warning duration of presetting, start liquid unit of putting out a fire through control system, handle putting out a fire to battery module. In the present application, the first alarm duration may be 10s to 30s, and preferably, the first alarm duration may be 10 s.
Preferably, the method further comprises: monitoring the concentration of combustible gas and the concentration of smoke in the space of the battery compartment to obtain real-time concentration data of the combustible gas and the concentration data of the smoke in the battery compartment in the space of the battery compartment; when the smoke concentration data in the battery module exceed a preset smoke concentration threshold value or the combustible gas concentration data in the battery compartment exceed a preset combustible gas concentration threshold value or the smoke concentration data in the battery compartment exceed a preset smoke concentration threshold value, continuously sending second alarm information to the control system; continuously receiving second alarm information through the control system, starting the gas fire extinguishing unit through the control system when the continuously received time reaches the preset second alarm duration, and extinguishing the fire of the battery compartment. In the present application, the second alarm duration may be 10 to 30s, and preferably, the second alarm duration may be 15 s. As shown in fig. 4.
Preferably, the method further comprises: when the battery temperature data exceeds a preset battery temperature threshold and the smoke concentration data in the battery module exceeds a preset smoke concentration threshold, continuously sending third alarm information to the control system; continuously receiving third alarm information through the control system, and starting the liquid fire extinguishing unit through the control system to extinguish the fire of the battery module when the continuously received time reaches a preset third alarm duration; meanwhile, the gas fire extinguishing unit is started through the control system to extinguish the fire of the battery compartment.
According to the method and the device, when the temperature data of the battery detected by the temperature detector in the battery module exceeds a preset battery temperature threshold value, and the smoke detector in the battery module detects that smoke concentration data all exceed the threshold value, third alarm information is given out for alarming, and after the third alarm duration lasts for a period of time (for example, 10 s-30 s), information is fed back to the control system. The control system controls the pipeline which penetrates through the target module and opens the liquid fire extinguishing unit to extinguish fire and cool the target battery module, and meanwhile, the gas fire extinguishing unit is operated to be opened to prevent the battery fire from spreading. Preferably, the third alarm period may be 15 s.
Preferably, the method further comprises: when the smoke concentration data in the battery module exceed a preset smoke concentration threshold or the battery temperature data exceed a preset battery temperature threshold and the smoke concentration in the battery compartment space exceeds the preset smoke concentration threshold in the battery compartment space, continuously sending fourth alarm information to the control system; continuously receiving fourth alarm information through the control system, and starting the liquid fire extinguishing unit through the control system to extinguish the fire of the battery module when the continuously received time reaches a preset fourth alarm duration; meanwhile, the gas fire extinguishing unit is started through the control system to extinguish the fire of the battery compartment. According to the method and the device, when smoke concentration data in the battery module detected by a detector in the battery module exceed a preset smoke concentration threshold or battery temperature data exceed a preset battery temperature threshold and the detector in the inner space of the battery cabin detects that the smoke concentration data in the battery cabin exceed the preset smoke concentration threshold, fourth alarm information is sent, and when the fourth alarm duration lasts for a period of time (for example, 10 s-30 s), the information is fed back to a control system. The control system controls the pipeline which penetrates through the target module and opens the liquid fire extinguishing unit to extinguish fire and cool the target battery module, and meanwhile, the gas fire extinguishing unit is operated to open to extinguish fire of the whole battery system. Preferably, the fourth alarm period may be 10 s.
Preferably, the method further comprises: when the temperature data of the at least two batteries exceed a preset battery temperature threshold or the smoke concentration data in the at least two battery modules exceed a preset smoke concentration threshold, continuously sending fifth alarm information to the control system; continuously receiving fifth alarm information through the control system, and starting the liquid fire extinguishing unit through the control system when the continuous receiving time reaches a preset fifth alarm duration to perform fire extinguishing treatment on the first battery module sending the fifth alarm information; meanwhile, the gas fire extinguishing unit is started through the control system to extinguish the fire of the battery compartment. When a plurality of battery modules detect fire signals in the electrochemical energy storage system, the control system needs to firstly control to open the gas fire extinguishing unit and simultaneously start the liquid fire extinguishing unit for the first alarm module. In the present application, the fifth alarm time period may be 10s to 30 s.
According to the fire extinguishing system, the alarm signal cannot be relieved after the fire extinguishing system acts, and the control system is required to automatically report to a fire alarm department and monitoring personnel to take external fire-fighting measures. When the acousto-optic system gives an alarm, monitoring personnel can judge the fire condition through monitoring or field observation and take corresponding measures.
This application explains with the fire extinguishing of lithium ion battery energy storage container as the embodiment, and wherein the work flow of extinguishing device's constitution and fire extinguishing strategy is as follows:
(1) the fire extinguishing device comprises a lithium ion battery container (n battery modules are arranged inside the lithium ion battery container), one 2.5Mpa gas storage steel cylinder (the internal gas component is heptafluoropropane), one 5L double-end-opening gas storage steel cylinder (a 3L fluorinated ether fire extinguishing agent is arranged inside the liquid storage steel cylinder), one centrifugal pump, one set of gas fire extinguishing agent pipeline system, one set of liquid fire extinguishing agent pipeline system, n +4 spray heads (1 spray head inside each module and 4 external spaces of the modules inside the battery system), n +6 electromagnetic valves (each electromagnetic valve is provided with a spray head which is connected, the gas storage steel cylinder and the gas storage steel cylinder are also respectively connected with one electromagnetic valve), n +4 smoke sensors, n temperature sensors, 4 combustible gas sensors, n +1 audible and visual alarm, and one set of control system.
The temperature detector detects that the temperature of a certain battery in the battery module is higher than 90 ℃, the audible and visual alarm is turned on, and a temperature signal is fed back to the control unit; the control unit controls an electromagnetic valve connected with the liquid storage steel cylinder and an electromagnetic valve connected with the spray head in each module to be opened, and opens the centrifugal pump, so that the liquid fire extinguishing agent is cooled by the spray head submerging problem module; when the temperature of the battery is reduced to below 60 ℃, a temperature signal is fed back to the control unit, the control unit controls the electromagnetic valve to be closed, and the centrifugal pump is closed.
The temperature-sensitive detector detects that the temperature of a certain battery in the battery module is higher than 90 ℃ and the smoke alarm detects that the smoke concentration in the battery module exceeds 200ppm, the sound-light alarm is turned on, and temperature and smoke signals are fed back to the control unit; the control unit controls all the electromagnetic valves to be opened, and opens the centrifugal pump, the gas fire extinguishing agent is sprayed to the outer space of the module in the battery energy storage container to extinguish open fire, and the liquid fire extinguishing agent submerges the problem module through the spray head to extinguish fire and cool; the temperature of the battery is reduced to below 60 ℃, a smoke sensor is not needed to be considered, a temperature signal is fed back to the control unit, the control unit controls the electromagnetic valve to be closed, and the centrifugal pump is closed.
When only the smoke sensor outside the module in the battery energy storage container detects that the smoke concentration exceeds 200ppm or the combustible gas sensor detects that the combustible gas concentration exceeds 25ppm, the sound-light alarm system is turned on, and smoke signals are fed back to the control unit; and controlling the electromagnetic valve connected with the gas storage steel cylinder and the electromagnetic valve connected with the external sprayer of the battery module to be opened, and spraying the gas fire extinguishing agent to the external space of the module in the battery energy storage container to extinguish open fire.
When the temperature detector in the battery module detects that the temperature of a certain battery in the battery module is higher than 90 ℃, the smoke alarm detects that the smoke concentration in the battery module exceeds 200ppm, the smoke sensor outside the battery module detects that the smoke concentration exceeds 200ppm or the combustible gas sensor detects that the combustible gas concentration exceeds 25ppm, the control unit controls all electromagnetic valves to be opened, the centrifugal pump is opened, the gas fire extinguishing agent is sprayed to the outer space of the battery energy storage container inner module to extinguish open fire, and the liquid fire extinguishing agent submerges the problem module through the spray head to extinguish the fire and cool.
The application provides a battery fire extinguishing strategy through gaseous fire extinguishing agent to battery system's the fire extinguishing, can extinguish the inside naked light of energy storage system effectively. The application provides a battery fire extinguishing strategy puts out a fire through the battery module of liquid fire extinguishing agent to the condition of a fire appears, can extinguish battery flame effectively and continuously cool down, extinguishes the conflagration of battery from the root. The utility model provides a battery fire extinguishing strategy combines the fire extinguishing method of two kinds of different modes to be in the same place, and through the flame in putting out the battery system with gaseous fire extinguishing agent to and extinguish the battery that takes place thermal runaway production flame in the module with liquid fire extinguishing agent, make and put out a fire more high-efficient. The utility model provides a battery fire extinguishing strategy just can feedback information to control system after monitoring system receives to continue to feed back a period, can reduce the false alarm rate in the controllable within range of conflagration. Typically, the time is controlled to be between 10 seconds and 30 seconds. The fire extinguishing strategy of the embodiment of the application relates to fire extinguishing of different positions and takes account of a battery system and a module in the system. This application fire extinguishing strategy adopts different fire extinguishing agents when putting out a fire to different positions, adopts gaseous fire extinguishing agent to extinguish naked light to energy storage system, adopts liquid fire extinguishing agent to cool down the battery when putting out a fire to battery module. In the fire extinguishing strategy, the monitoring system needs to continuously receive the signal for a period of time, and then the whole system starts to respond, so that the false alarm rate is effectively reduced.
Fig. 5 is a system block diagram for fire suppression in an electrochemical energy storage system, according to a preferred embodiment of the present invention. As shown in fig. 5, the present application provides a system for suppressing a fire in an electrochemical energy storage system, the system comprising:
and the monitoring unit 501 is configured to monitor the temperature and the smoke concentration in the battery module, and acquire real-time battery temperature data in the battery module and smoke concentration data in the battery module. The early warning unit 502 is configured to continuously send first warning information to the control system when the battery temperature data exceeds a preset battery temperature threshold or the smoke concentration data in the battery module exceeds a preset smoke concentration threshold. And the execution unit 503 is configured to continuously receive the first alarm information through the control system, and when the time for continuous reception reaches a preset first alarm duration, start the liquid fire extinguishing unit through the control system to perform fire extinguishing processing on the battery module.
Preferably, the monitoring unit 501 is further configured to monitor the combustible gas concentration and the smoke concentration in the battery compartment space, and obtain real-time combustible gas concentration data and smoke concentration data of the battery compartment in the battery compartment space. The early warning unit 502 is further configured to continuously send second warning information to the control system when smoke concentration data in the battery module exceeds a preset smoke concentration threshold or combustible gas concentration data in the battery compartment exceeds a preset combustible gas concentration threshold or smoke concentration data in the battery compartment exceeds a preset smoke concentration threshold. And the execution unit 503 is further configured to continuously receive the second alarm information through the control system, and when the continuously received time reaches a preset second alarm duration, the control system starts the gas fire extinguishing unit to extinguish the fire of the battery compartment.
Preferably, the early warning unit 502 is further configured to continuously send third warning information to the control system when the battery temperature data exceeds a preset battery temperature threshold and the smoke concentration data in the battery module exceeds a preset smoke concentration threshold. The execution unit 503 is further configured to continuously receive third alarm information through the control system, and when the continuously received time reaches a preset third alarm duration, start the liquid fire extinguishing unit through the control system to perform fire extinguishing processing on the battery module; meanwhile, the gas fire extinguishing unit is started through the control system to extinguish the fire of the battery compartment.
Preferably, the early warning unit 502 is further configured to continuously send fourth warning information to the control system when smoke concentration data in the battery module exceeds a preset smoke concentration threshold or battery temperature data exceeds a preset battery temperature threshold, and when battery compartment smoke concentration data in the battery compartment space exceeds a preset smoke concentration threshold. The execution unit 503 is further configured to continuously receive fourth alarm information through the control system, and when the continuously received time reaches a preset fourth alarm duration, start the liquid fire extinguishing unit through the control system to perform fire extinguishing processing on the battery module; meanwhile, the gas fire extinguishing unit is started through the control system, and fire extinguishing treatment is carried out on the space of the battery compartment.
Preferably, the early warning unit 502 is further configured to continuously send fifth warning information to the control system when at least two pieces of battery temperature data exceed a preset battery temperature threshold or smoke concentration data in at least two battery modules exceed a preset smoke concentration threshold. The execution unit 503 is further configured to continuously receive fifth alarm information through the control system, and when the continuous receiving time reaches a preset fifth alarm duration, start the liquid fire extinguishing unit through the control system to perform fire extinguishing processing on the first battery module sending the fifth alarm information; meanwhile, the gas fire extinguishing unit is started through the control system to extinguish the fire of the battery compartment.
A system 500 for electrochemical energy storage system fire suppression according to a preferred embodiment of the present invention corresponds to the method 100 for electrochemical energy storage system fire suppression according to a preferred embodiment of the present invention, and will not be described herein again.
The invention has been described with reference to a few embodiments. However, other embodiments of the invention than the one disclosed above are equally possible within the scope of the invention, as would be apparent to a person skilled in the art from the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the [ device, component, etc ]" are to be interpreted openly as referring to at least one instance of said device, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
Claims (10)
1. A method for an electrochemical energy storage system to extinguish a fire, the method comprising:
monitoring the temperature and the smoke concentration in the battery module to obtain real-time battery temperature data and smoke concentration data in the battery module;
when the battery temperature data exceeds a preset battery temperature threshold or the smoke concentration data of the battery module exceeds a preset smoke concentration threshold, continuously sending first alarm information to a control system;
through control system continuously receives first alarm information, when the time that continuously receives reaches the first warning duration of predetermineeing, through control system starts the liquid unit of putting out a fire, right battery module puts out a fire and handles.
2. The method of claim 1, further comprising:
monitoring the concentration of combustible gas and the concentration of smoke in the space of the battery compartment to obtain real-time concentration data of the combustible gas and the concentration data of the smoke in the battery compartment in the space of the battery compartment;
when the smoke concentration data in the battery module exceed a preset smoke concentration threshold value or the combustible gas concentration data in the battery compartment exceed a preset combustible gas concentration threshold value or the smoke concentration data in the battery compartment exceed a preset smoke concentration threshold value, continuously sending second alarm information to a control system;
through control system continuously receives second alarm information, when the time that continuously receives reaches predetermined second warning duration, through control system starts gaseous unit of putting out a fire, right the battery compartment is put out a fire and is handled.
3. The method of claim 1, further comprising:
when the battery temperature data exceeds a preset battery temperature threshold and the smoke concentration data in the battery module exceeds a preset smoke concentration threshold, continuously sending third alarm information to a control system;
continuously receiving the third alarm information through the control system, and starting a liquid fire extinguishing unit through the control system to extinguish the fire of the battery module when the continuously received time reaches a preset third alarm duration; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
4. The method of claim 1, further comprising:
when smoke concentration data in the battery module exceed a preset smoke concentration threshold or battery temperature data exceed a preset battery temperature threshold and the smoke concentration data of the battery compartment in the battery compartment space exceed the preset smoke concentration threshold, continuously sending fourth alarm information to a control system;
continuously receiving the fourth alarm information through the control system, and starting a liquid fire extinguishing unit through the control system to extinguish the fire of the battery module when the continuously received time reaches a preset fourth alarm duration; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment space.
5. The method of claim 1, further comprising:
when the at least two battery temperature data exceed a preset battery temperature threshold or the smoke concentration data in the at least two battery modules exceed a preset battery smoke concentration threshold, continuously sending fifth alarm information to a control system;
continuously receiving the fifth alarm information through the control system, and starting a liquid fire extinguishing unit through the control system when the continuous receiving time reaches a preset fifth alarm duration to extinguish the fire of the first battery module sending the fifth alarm information; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
6. A system for suppressing a fire in an electrochemical energy storage system, the system comprising:
the monitoring unit is used for monitoring the temperature and the smoke concentration in the battery module to acquire real-time battery temperature data in the battery module and smoke concentration data in the battery module;
the early warning unit is used for continuously sending first warning information to a control system when the battery temperature data exceeds a preset battery temperature threshold or the smoke concentration data of the battery module exceeds a preset smoke concentration threshold;
and the execution unit is used for continuously receiving the first alarm information through the control system, starting the liquid fire extinguishing unit through the control system when the time of continuous reception reaches the preset first alarm duration, and then extinguishing the fire of the battery module.
7. The system of claim 6, further comprising:
the monitoring unit is used for monitoring the combustible gas concentration and the smoke concentration of the battery compartment space to obtain real-time combustible gas concentration data and smoke concentration data of the battery compartment space;
the early warning unit is used for continuously sending second warning information to the control system when smoke concentration data in the battery module exceed a preset smoke concentration threshold or combustible gas concentration data in the battery compartment exceed a preset combustible gas concentration threshold or the smoke concentration data in the battery compartment exceed a preset smoke concentration threshold;
and the execution unit is used for continuously receiving the second alarm information through the control system, starting the gas fire extinguishing unit through the control system when the time of continuous receiving reaches the preset second alarm duration, and then carrying out fire extinguishing treatment on the battery compartment.
8. The system of claim 6, further comprising:
the early warning unit is used for continuously sending third warning information to the control system when the battery temperature data exceeds a preset battery temperature threshold and the smoke concentration data in the battery module exceeds a preset smoke concentration threshold;
the execution unit is used for continuously receiving the third alarm information through the control system, and when the continuous receiving time reaches a preset third alarm duration, the liquid fire extinguishing unit is started through the control system to extinguish the fire of the battery module; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
9. The system of claim 6, further comprising:
the early warning unit is used for continuously sending fourth warning information to the control system when smoke concentration data in the battery module exceed a preset smoke concentration threshold or battery temperature data exceed a preset battery temperature threshold and smoke concentration data of a battery compartment in the battery compartment space exceed a preset smoke concentration threshold;
the execution unit is used for continuously receiving the fourth alarm information through the control system, and when the continuously received time reaches a preset fourth alarm duration, the liquid fire extinguishing unit is started through the control system to extinguish the fire of the battery module; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment space.
10. The system of claim 6, further comprising:
the early warning unit is used for continuously sending fifth warning information to the control system when at least two battery temperature data exceed a preset battery temperature threshold value or smoke concentration data in at least two battery modules exceed a preset smoke concentration threshold value;
the execution unit is used for continuously receiving the fifth alarm information through the control system, and when the continuous receiving time reaches a preset fifth alarm duration, the liquid fire extinguishing unit is started through the control system to extinguish the fire of the first battery module sending the fifth alarm information; and meanwhile, starting a gas fire extinguishing unit through the control system to extinguish the fire of the battery compartment.
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