CN117482440A - Battery fire control management method and system - Google Patents
Battery fire control management method and system Download PDFInfo
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Classifications
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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
- A62C31/005—Delivery of fire-extinguishing material using nozzles
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/28—Accessories for delivery devices, e.g. supports
-
- 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
- A62C37/40—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 with electric connection between sensor and actuator
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4214—Arrangements for moving electrodes or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
-
- 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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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the field of battery production and discloses a battery fire-fighting management system, which comprises a detection unit, a fire extinguishing unit, an alarm unit and a control unit, wherein the detection unit, the fire extinguishing unit and the control unit are all connected with the control unit, the detection unit comprises temperature detection and gas detection, and the detection unit is used for analyzing the fire condition of a battery according to the temperature detection and gas detection results; the fire extinguishing unit comprises a gas transmission pipe network and a spray head, the spray head is connected with the gas transmission pipe network, and the control unit controls the spray head to spray protective gas to the battery according to the detection result of the detection unit; the invention also discloses a battery fire control management method, which comprises the following steps of firstly, detecting the temperature condition of the battery and the gas substances in the space where the battery is positioned; step two, spraying protective gas; step three, abnormal battery transfer isolation; the invention has the beneficial effects of high fire extinguishing efficiency and low battery damage rate.
Description
Technical Field
The invention relates to the field of battery production, in particular to a battery fire control management method and system.
Background
Lithium batteries are widely used in portable devices due to excellent properties such as high energy storage density and long life span, and are also widely used in Electric Vehicles (EV) or Hybrid Electric Vehicles (HEV) due to the recent rise and development of new energy automobiles. However, when the conditions of overheating, overcharge and discharge, short circuit caused by defects of battery design and defects of raw materials and the like exist on the lithium battery, chemical reaction occurs between battery materials in the lithium battery, electrolyte is decomposed, a large amount of heat and gas are generated, and therefore thermal runaway of the battery is caused, and the battery fires and even explosion are caused. In the production and use process of the battery, the method is particularly important for the fire safety management of the battery.
For example, patent document CN112043993a discloses a fire extinguishing system with energy storage battery compartment and fire extinguishing method thereof, comprising a prefabricated compartment, wherein a plurality of energy storage battery boxes are arranged in the prefabricated compartment, fire detectors are arranged in the energy storage battery boxes, and the fire detectors are electrically connected with signal input ends of fire alarm controllers; the signal output end of the fire alarm controller is connected with a gas fire extinguishing system and a water mist fire extinguishing system. The fire extinguishing method comprises the following steps: judging the fire type of the energy storage battery box according to the detection result of the fire detector: when the fire disaster type is an electric fire disaster, starting a gas fire extinguishing system to extinguish open fire, and starting a water mist fire extinguishing system to cool down; when the fire disaster type is battery fire disaster, the water mist fire extinguishing system is started to extinguish the fire and reduce the temperature.
The technical scheme can realize detection of fire disaster of the battery box and extinguish and cool the battery. However, in the prior art, liquid mediums such as water mist and the like are generally used for extinguishing fire and cooling the battery in the fire extinguishing process of the battery, so that the water mist can spread in a battery box during fire extinguishing, and water can invade other normal batteries in the fire extinguishing process, so that the battery is damaged by water soaking. And when there is the multiunit battery in the battery box, can't fix a position and keep apart the battery that has the abnormality, lead to the battery to take place chain reaction easily with other batteries after the fire, lead to the risk of conflagration to improve by a wide margin.
Disclosure of Invention
The invention aims to provide a battery fire-fighting management method and system, which are used for solving the problems that water mist can spread in a battery box during fire extinguishment in the prior art, so that water can invade other normal batteries during the fire extinguishment process, and the battery soaking water is damaged; and when a plurality of groups of batteries exist in the battery box, the abnormal batteries cannot be positioned and isolated, so that chain reaction between the batteries and other batteries is easy to occur after the batteries are on fire, and the risk of fire is greatly improved.
In order to achieve the above purpose, the invention adopts the following technical scheme: the battery fire-fighting management system comprises a detection unit, a fire extinguishing unit, an alarm unit and a control unit, wherein the detection unit, the fire extinguishing unit and the control unit are all connected with the control unit, the detection unit comprises temperature detection and gas detection, and the detection unit is used for analyzing the fire condition of a battery according to the temperature detection and the gas detection result; the fire extinguishing unit comprises a gas transmission pipe network and a spray head, the spray head is connected with the gas transmission pipe network, and the control unit controls the spray head to spray protective gas to the battery according to the detection result of the detection unit; the control unit is also used for controlling the alarm unit to give an alarm according to the detection result, wherein the alarm content of the alarm unit comprises the position information of the abnormal battery.
The principle and the advantages of the scheme are as follows: when the battery is subjected to fire control management, the battery, the temperature of the environment where the battery is located and the gas generated by combustion are detected through the detection unit in the production, storage and other processes of the battery, when the detection unit detects that the battery is overheated or burnt, the control unit controls the fire extinguishing unit at the corresponding position to spray protective gas to extinguish the fire and cool the battery, and meanwhile, an alarm is sent out through the alarm unit to guide related personnel to process the battery with abnormality or fire. In this scheme when managing battery fire control, the control unit is in time handled and is notified the condition of a fire with alarm unit according to detecting element's testing result control fire extinguishing unit for can in time handle when the battery appears unusual, avoid the further spread and the development of condition of a fire, reduce the influence scope of condition of a fire, and put out a fire the battery through gaseous fire extinguishing agent when putting out a fire, avoid spreading and infiltration to normal battery at the in-process moisture of putting out a fire or dust of putting out a fire, guarantee the security of battery, avoid the battery to appear damaging in the in-process of putting out a fire, reduce the loss in the in-process of putting out a fire. Meanwhile, the abnormal battery position in the fire disaster process is detected, so that the abnormal battery can be transferred and isolated in time in the fire disaster process, and the threat of the abnormal battery to the surrounding environment is reduced.
Preferably, as an improvement, the detection unit includes a temperature detection for detecting a temperature of a placement region of the battery and a gas detection for detecting a gas in a region of the battery. By detecting the combustion gas and the temperature simultaneously, the abnormal state before the occurrence of the fire and the development stage in the fire process are conveniently detected, the control unit is convenient to conduct targeted treatment on different types of abnormalities, and the pertinence of fire extinguishing measures is improved.
Preferably, as an improvement, the detection unit further includes a battery detection for detecting a temperature inside the battery. The detection unit can timely detect abnormal temperature rise in the battery, so that the battery can be conveniently and timely processed in an abnormal germination stage, and fire is avoided.
Preferably, as an improvement, one end of the gas transmission pipe network, which is far away from the spray head, is connected with a gas storage tank, and a protective gas is arranged in the gas storage tank and is compressed gas. When the fire is extinguished by the protective gas, the environment and the battery can be cooled by the expansion heat absorption of the compressed gas, and the fire extinguishing effect on the battery is improved.
Preferably, as an improvement, the fire extinguishing unit further comprises an exhaust part, wherein the exhaust part is distributed opposite to the spray heads, and the exhaust part is used for exhausting air in the area where the battery is located. The air in the area is discharged in the fire extinguishing process, so that the oxygen content in the area is reduced, the concentration and the distribution uniformity of the protective gas are improved, and the fire extinguishing effect of the protective gas is ensured.
Preferably, as an improvement, the fire extinguishing unit further comprises a transfer part, and the transfer part locates the abnormal battery and transfers and isolates the abnormal battery according to the detection result. Through in time shifting the isolation to the battery, the battery of avoiding appears thermal runaway or explosion, guarantees the safety of surrounding battery and facility.
A battery fire management method comprising the steps of:
detecting the temperature condition of the battery and gas substances in a space where the battery is located, analyzing the detection result, and judging whether the battery temperature is abnormal or the battery burns;
step two, when the detection result in the step one is abnormal or burnt, spraying protective gas to the area where the battery is located, and discharging air in the area outwards in the process of spraying the protective gas;
and thirdly, detecting the temperature of each battery, spraying protective gas in a targeted manner on the battery with abnormal temperature detection, and meanwhile, transferring and isolating the abnormal battery.
Preferably, in the first step, the method further comprises detecting the temperature inside the battery, and comparing and analyzing the detected ambient temperature with the internal temperature of the battery and the critical temperature to judge whether the battery has abnormal overheat condition.
Preferably, in the third step, alarm information is also issued according to the detected abnormal battery information.
Preferably, in the first and second steps, the protection gas is sprayed, and the temperature of the environment and the surface of the battery is continuously detected, and when the fire is extinguished and the temperature of the electricity and the environment is reduced to a preset value, the spraying of the protection gas is stopped. The fire can be completely extinguished during fire extinguishment, and the occurrence of fire re-ignition after extinguishment is avoided.
Drawings
Fig. 1 is a system block diagram of a battery fire management system in an embodiment of the invention.
Fig. 2 is a flow chart of a method for managing battery fire protection in an embodiment of the invention.
Detailed Description
The following is a further detailed description of the embodiments:
as shown in FIG. 1, the battery fire-fighting management system comprises a detection unit, a fire extinguishing unit, an alarm unit and a control unit, wherein the detection unit, the fire extinguishing unit and the alarm unit are all connected with the control unit, the control unit is a singlechip or a microprocessor, and the control unit in the embodiment is preferably a singlechip with the model STM32F7X 2. The detection unit comprises temperature detection and gas detection, and the specific temperature detection detects the temperature of the position of the battery placement area and the temperature distribution condition of the surface of the battery through a temperature sensor or a thermal imaging sensor. The gas detection is carried out by detecting substances generated after combustion in the air in the area where the battery is located, and specifically, when the gas is detected, smoke or specific substances generated in the combustion process can be detected through a smoke sensor or a gas sensor, so that whether conditions such as fire combustion exist or not is judged. The detection unit detects temperature and gas simultaneously for the detection unit can in time monitor the unusual information of different development stages, improves the detection unit and detects the accuracy of abnormal conditions, avoids having the judgement error at battery unusual or when producing the burning detection unit, leads to taking the fire extinguishing measure after the conflagration development is serious, leads to missing the best opportunity of putting out a fire.
The detection unit also comprises a battery detection unit, wherein the battery detection unit can be used for installing a temperature detection probe in the battery to detect the temperature of an electric core inside the battery. Specifically, a passive RFID temperature sensor is arranged on the surface of each battery cell, and the passive RFID temperature sensor is fixedly arranged on the surface of each battery cell to monitor the temperature of the surface of each battery cell. And the reader-writer and the RFID temperature sensor are used for signal transmission to read the temperature detection data in each cell. Through detecting the inside temperature of battery for can in time be detected when the inside appearance of electric core is unusual, be convenient for in time examine the battery that has the unusual possibility, realize handling in the unusual emergence stage of battery, avoid the production of conflagration.
The fire extinguishing unit comprises a gas transmission pipe network and spray heads, wherein the gas transmission pipe network is formed by combining a plurality of gas transmission pipes, one end of the gas transmission pipe network is connected with a gas storage tank, the other end of the gas transmission pipe network extends to each battery placement area, the plurality of spray heads are installed in each battery placement area, and gas inlets of the spray heads are communicated with the gas transmission pipe network. Be equipped with shielding gas in the gas holder, specific shielding gas can be nitrogen gas, carbon dioxide, non-combustion-supporting or non-inflammable gas such as inert gas, the preferred is put out a fire to the battery through spraying carbon dioxide in this embodiment to shielding gas is compressed gas, and compressed gas expands after spraying, when making shielding gas can separate the further development of fire source, through spraying compressed gas to the battery, realize the cooling operation to the battery, avoid the battery to further worsen under the high temperature, simultaneously cool down through gas to the battery, avoid cooling down through mediums such as water smoke in the fire extinguishing process, there is a large amount of moisture in the environment, make the battery bubble water that has not taken place unusually damage all the rest, reduce the damage rate of battery in the fire extinguishing process.
The fire extinguishing unit further comprises an exhaust part, the exhaust part and the spray head are distributed in opposite directions, the exhaust part is used for exhausting air in the area where the battery is located, the exhaust part can be an exhaust fan or an exhaust port according to the structure of the area where the battery is located, the exhaust part is used for exhausting air in the battery storage area in the process of spraying protective gas for extinguishing fire by the fire extinguishing unit, the oxygen content in the area is reduced, the concentration and the distribution uniformity of the protective gas are improved, and the fire extinguishing effect of the protective gas is guaranteed.
The fire extinguishing unit further comprises a transfer part, and the transfer part positions the abnormal battery according to the detection result of the detection unit and transfers and isolates the abnormal battery. When the specific detection unit detects, the position of the battery with abnormality is determined according to the temperature detection area and the battery detection result, wherein the temperature detection result of each battery core in the area is detected through the battery when the position is determined, the battery core with the temperature abnormality is positioned, the transfer part transfers the battery core with the temperature abnormality and the battery into the explosion-proof box and other devices for isolation according to the battery core information provided by the detection unit, the battery is prevented from being out of control or exploded due to further explosion caused by the abnormal battery, other batteries around the battery are driven to generate chain reaction, and the risk and loss of fire are reduced.
The invention also aims to provide a battery fire control management system which is suitable for the battery fire control management method, and as shown in fig. 2, the system comprises the following steps:
detecting the temperature condition of the battery and gas substances in a space where the battery is located, analyzing the detection result, and judging whether the battery temperature is abnormal or whether the battery burns or not. The temperature of each battery is compared with the temperature of the surrounding environment when the temperature is detected, and when the temperature of the battery is increased compared with the temperature of the surrounding environment, the detection unit continuously observes the temperature change of the battery in the area and sends out notification to relevant staff to check the condition of the battery; when the temperature of the battery is seriously increased, for example, when the temperature of the battery reaches 60% -80% of the critical temperature of the battery, spraying protective gas to the surface of the battery, cooling the surface of the battery, continuously observing the temperature condition of the battery, sending state information of the related battery to related staff, and informing the staff to check the condition of the battery; when the temperature of the battery reaches more than 80% of the critical temperature or is higher than the temperature range capable of performing manual intervention, the battery is judged to be an abnormal temperature battery. When detecting gaseous substances, the smoke sensor is used for detecting suspended particles in the air or specific gases during combustion, such as carbon monoxide, sulfur dioxide and the like. When suspended particles exist in the air or gas generated during combustion exists, the existence of combustion in the area is judged.
And step two, when the detection result in the step one is abnormal or burnt, spraying protective gas to the area where the battery is located, and discharging air in the area outwards in the process of spraying the protective gas. The specific shielding gas can be carbon dioxide, inert gas and other non-combustion-supporting gases, the shielding gas is conveyed to the area where the battery is located through a pipeline to be sprayed, when the air is discharged, the area can be discharged while the area is sprayed with the shielding gas through channels for air circulation such as an exhaust fan and an exhaust window, so that the original air in the area where the battery is located can be discharged outwards, and the area is filled with the shielding gas, so that the area where the battery is located can be filled with the high-concentration shielding gas, a nonflammable environment is formed in the area, further development and spread of fire are restrained, oxygen around the battery is isolated, and fire sources are extinguished.
And thirdly, detecting the temperature of each battery, spraying protective gas in a targeted manner on the battery with abnormal temperature detection, and meanwhile, transferring and isolating the abnormal battery. Specifically, when the detection unit detects the abnormality of the battery, when the abnormal battery is found, the position of the abnormal battery is positioned, and the position information of the abnormal battery is uploaded, so that a worker or a transfer device can transfer the battery to an isolation area in time to isolate the battery, and further deterioration of the battery condition is avoided.
In the first step and the second step, the injected protective gas is compressed gas, and absorbs the temperature of the environment and the surface of the battery while expanding and diffusing the volume after the injection, so that the temperature of the environment and the surface of the battery is reduced. Meanwhile, when the protection gas is sprayed, the temperature of the environment and the surface of the battery is continuously detected, and when the fire extinguishment is completed and the electricity and the environment temperature are reduced to a preset value, the protection gas spraying is stopped. In the third step, alarm information is also sent out according to the detected abnormal battery information. Specifically, when alarming, according to the detection result in the first step, the abnormal conditions such as abnormal battery temperature or state information such as combustion and the like and abnormal position information are alarmed, and related personnel are informed to timely process, wherein when alarming, alarming can be performed in a mode such as an audible and visual alarm, mail, message notification and the like, so that when the battery is extinguished by spraying protective gas, related personnel are timely informed to process, emergency plan processing is conveniently performed by the personnel in the process of extinguishing, the emergency in the process of extinguishing can be timely processed, and smooth extinguishing of fire is ensured.
Compared with the prior art, when the fire control management is carried out on the battery, the temperature and the gas are detected together, so that each stage of battery combustion can be found in time before the battery is abnormal, during the abnormal development and during the battery combustion, the battery is extinguished by spraying the protective gas, the safety of the nearby normal battery is protected, the spread of fire and the expansion of fire are avoided, and the loss in the fire process is reduced. Simultaneously in this scheme put out a fire and the cooling to the battery all through spraying compressed shielding gas, utilize the endothermic process of inflation of compressed gas to cool down environment and battery to through the oxygen in the shielding gas reduction environment after the inflation, realize the further development and the spreading of separation scene of a fire, improve the efficiency of putting out a fire and cooling to the battery, and avoid using the water-based fire extinguisher to lead to the damage of battery.
The foregoing is merely exemplary of the present invention and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (10)
1. A battery fire management system, characterized by: the fire extinguishing device comprises a detection unit, a fire extinguishing unit, an alarm unit and a control unit, wherein the detection unit, the fire extinguishing unit and the control unit are all connected with the control unit, the detection unit comprises temperature detection and gas detection, and the detection unit is used for analyzing the fire condition of a battery according to the temperature detection and the gas detection result; the fire extinguishing unit comprises a gas transmission pipe network and a spray head, the spray head is connected with the gas transmission pipe network, and the control unit controls the spray head to spray protective gas to the battery according to the detection result of the detection unit; the control unit is also used for controlling the alarm unit to give an alarm according to the detection result, wherein the alarm content of the alarm unit comprises the position information of the abnormal battery.
2. The battery fire management system of claim 1, wherein: the detection unit comprises temperature detection and gas detection, wherein the temperature detection is used for detecting the temperature of a placement area of the battery, and the gas detection is used for detecting the gas in the area where the battery is located.
3. A battery fire management system according to claim 2, wherein: the detection unit further includes a battery detection for detecting a temperature inside the battery.
4. The battery fire management system of claim 1, wherein: one end, far away from the spray head, of the gas transmission pipe network is connected with a gas storage tank, and protective gas is arranged in the gas storage tank and is compressed gas.
5. The battery fire management system of claim 1, wherein: the fire extinguishing unit further comprises an exhaust part, the exhaust part and the spray nozzle are distributed in opposite directions, and the exhaust part is used for exhausting air in the area where the battery is located.
6. The battery fire management system of claim 1, wherein: the fire extinguishing unit further comprises a transfer part, and the transfer part positions the abnormal battery according to the detection result and transfers and isolates the abnormal battery.
7. A method of battery fire management, adapted for use in a battery fire management system as defined in any one of claims 1-6, wherein: the method comprises the following steps:
detecting the temperature condition of the battery and gas substances in a space where the battery is located, analyzing the detection result, and judging whether the battery temperature is abnormal or the battery burns;
step two, when the detection result in the step one is abnormal or burnt, spraying protective gas to the area where the battery is located, and discharging air in the area outwards in the process of spraying the protective gas;
and thirdly, detecting the temperature of each battery, spraying protective gas in a targeted manner on the battery with abnormal temperature detection, and meanwhile, transferring and isolating the abnormal battery.
8. The battery fire management method of claim 7, wherein: in the first step, the method further comprises detecting the temperature inside the battery, and comparing and analyzing the detected ambient temperature with the temperature inside the battery and the critical temperature to judge whether the battery has abnormal overheat.
9. The battery fire management method of claim 7, wherein: in the third step, alarm information is also sent out according to the detected abnormal battery information.
10. The battery fire management method of claim 7, wherein: in the first and second steps, the protection gas is sprayed, the temperature of the environment and the battery surface is continuously detected, and when the fire extinguishment is completed and the electricity and the environment temperature are reduced to the preset value, the protection gas spraying is stopped.
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