CN115228029B - Multi-stage early warning and fire extinguishing method for fire disaster of lithium ion battery cabinet - Google Patents
Multi-stage early warning and fire extinguishing method for fire disaster of lithium ion battery cabinet Download PDFInfo
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- CN115228029B CN115228029B CN202210672895.8A CN202210672895A CN115228029B CN 115228029 B CN115228029 B CN 115228029B CN 202210672895 A CN202210672895 A CN 202210672895A CN 115228029 B CN115228029 B CN 115228029B
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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
- 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
- A62C31/28—Accessories for delivery devices, e.g. supports
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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
- 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
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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 multi-stage early warning and fire extinguishing method for a fire disaster of a lithium ion battery cabinet. The four-stage early warning system comprises a distributed optical fiber temperature sensing detector for monitoring the temperature of the battery and accurately positioning, a multi-parameter coupling early warning module in the battery module, and a linear temperature sensing fire detector, a stress sensor and a smoke detector for monitoring the fire disaster of the battery cabinet. The automatic fire extinguishing system comprises a perfluorinated hexanone fire extinguishing system, a water mist fire extinguishing system and a water spray fire extinguishing system. The invention can use a four-level early warning mode aiming at the fire disasters of the battery cells, the modules and the battery cabinets and trigger four-level fire extinguishing response. The control system can send out three-level control signals aiming at different states of the battery to flexibly change the fire extinguishing method, and comprises the steps of changing the power (pressure) of the pump set and carrying out intermittent spray cooling measures to further improve the fire extinguishing and cooling effects, save the consumption of fire extinguishing agents and ensure the safe operation of the lithium ion battery energy storage system.
Description
Technical Field
The invention belongs to the technical field of safety, in particular to the technical field of lithium ion battery fire protection, and particularly relates to a multi-stage early warning and fire extinguishing method for a lithium ion battery cabinet fire disaster.
Background
Since the commercialization of lithium ion batteries in the 90 th century, a new energy revolution has opened the preamble. The lithium ion battery technology is continuously developed and innovated, and is widely applied to the fields of various portable electronic products, electric automobiles, energy storage power stations and the like by virtue of the advantages of high energy density, low self-discharge rate, long cycle life, environmental friendliness and the like. However, the lithium ion battery is extremely susceptible to temperature rise under abuse conditions such as overheating, overcharging, mechanical extrusion, and the like due to the presence of active electrode materials and flammable electrolyte therein. Meanwhile, because of the pursuit of high energy density, the unit cells often form modules, battery packs and battery clusters in a serial-parallel connection manner. This spatial limitation creates a more hostile heat sink environment, and the interior of the battery is more prone to heat build up, triggering thermal runaway. Thermal runaway propagates between the module and the battery cluster, thereby causing a larger-scale fire explosion accident. In recent years, fire explosion accidents of lithium ion batteries are frequently reported, so that further development of the lithium ion batteries is limited, and life and property safety of people is greatly threatened. Therefore, the development of a high-precision early warning system and a high-efficiency fire extinguishing method of the lithium ion battery has important significance for guaranteeing the safe operation of the battery.
In the prior art, in order to improve the accuracy of early warning, the existing early warning system mostly adopts a multi-parameter coupling early warning mode such as temperature, characteristic gas concentration, smoke and the like, adopts a multi-stage early warning mode and timely responds to fire extinguishing measures to reduce the risk and harm of thermal runaway of a battery. Even so, the early warning and fire extinguishing system of the lithium ion battery cabinet still has certain defects and shortcomings: 1) Most of temperature sensors in the early warning system monitor the ambient temperature in the module. When the safety valve of the battery is opened, the internal temperature rise rate of the module is low, the sensitivity of the sensor is low, and early warning is difficult to realize. 2) The existing fire extinguishing method is also limited to adopting different fire extinguishing media according to different states of the battery, and the problem that the battery needs to be cooled after the open fire of the battery is extinguished is solved, but the best fire extinguishing and cooling effects are not considered by actively and flexibly applying the fire extinguishing method. 3) The existing fire extinguishing method does not consider the problem of saving fire extinguishing agent to the maximum extent on the basis of ensuring the fire extinguishing effect.
Disclosure of Invention
Aiming at the thermal runaway fire disaster characteristics of the lithium ion battery cabinet, the invention provides an intelligent and efficient fire extinguishing method in a multistage and multiparameter coupling early warning mode. The fire extinguishing method is flexibly adopted while the early warning accuracy is improved. Not only can fast inhibit open fire, but also has excellent cooling effect, and prevents thermal runaway from spreading in the lithium ion battery cabinet. The quick response and protection of the lithium ion battery at the first time in each stage of thermal runaway are realized, the thermal runaway scale is prevented from further expanding, and the harm of the thermal runaway of the battery is reduced to the maximum extent.
The invention aims to overcome the defects and shortcomings of the existing early warning and fire extinguishing system in the lithium ion battery cabinet type energy storage unit, and provides an active and flexible lithium ion battery multi-stage early warning and fire extinguishing method, which improves the safety of the lithium ion battery energy storage system and prevents thermal runaway from spreading in a module and flame from spreading in a battery cabinet. The invention aims to solve the technical problems that the existing fire-fighting system has a protection blank space before battery thermal runaway and has poor fire-extinguishing and cooling effects.
In order to solve the problems and achieve the purposes, the technical scheme of the invention is as follows:
a multi-stage early warning and fire extinguishing method for a lithium ion battery cabinet fire disaster uses a multi-stage early warning and fire extinguishing device for the battery cabinet fire disaster, and the device comprises a four-stage early warning system, a control system and an automatic fire extinguishing system;
the four-stage early warning system carries out real-time monitoring early warning aiming at different stages before and after three layers of thermal runaway of a battery cell, a battery module and a battery cabinet; the battery module comprises a plurality of battery monomers and is arranged in the battery cabinet;
the four-stage early warning system comprises a distributed optical fiber temperature sensing detector, a battery module thermal runaway early warning module, a linear temperature sensing fire detector, a pressure sensor and a second smoke detector;
the distributed optical fiber temperature sensing detector is arranged on the side surface of each battery monomer and is used for monitoring the temperature change of each battery monomer and determining the position of the battery with the temperature rise phenomenon, namely primary early warning;
the battery module thermal runaway early warning module comprises an infrared flame detector and H 2 And a CO sensor, a first smoke detector, and a Volatile Organic Compound (VOC) detector;
h in battery module thermal runaway early warning module 2 The CO sensor and the pressure sensor on the surface of the battery cabinet are respectively used for detecting the concentration of the characteristic gas and the generated pressure after the battery safety valve is opened, namely, the secondary early warning; the infrared flame detector, the first smoke detector and the VOC detector in the thermal runaway early warning module capture open flame generated in the battery module, namely three-level early warning; the surface of the battery cabinet is provided with a pressure sensorA second smoke detector is arranged on the wall of the prefabricated cabin adjacent to the battery cabinet, and a linear temperature-sensing fire detector is arranged at the top of the prefabricated cabin above the battery cabinet and used for detecting the thermal runaway propagation in the battery cabinet, namely, four-stage early warning; the four-level early warning layer by layer is progressive, and four-level fire extinguishing response can be made for different states of thermal runaway of different battery levels;
the control system comprises a signal processing module, an alarm module and a control module; the input end of the control system is connected with the early warning system, and the output end of the control system is connected with the automatic fire extinguishing system; the signal processing module is in charge of receiving and processing detection signals of the early warning system, and when the signals exceed a preset threshold value, the alarm module sends out early warning signals of corresponding grades; the control module controls the fire extinguishing system to take response measures of different grades according to the early warning signals of different grades or controls the fire extinguishing system to change the fire extinguishing method according to different thermal runaway states in the battery cabinet;
the automatic fire extinguishing system comprises a perfluorinated hexanone fire extinguishing system, a water mist fire extinguishing system and a water spray fire extinguishing system, and is controlled by the control system.
Preferably, the perfluorinated hexanone fire extinguishing system comprises a perfluorinated hexanone storage tank, a booster pump, a fire-fighting pipeline, an electromagnetic valve and a perfluorinated hexanone spray head.
Preferably, the water mist fire suppression system comprises a water storage tank, a water pump and a water mist nozzle.
Preferably, the water spray fire suppression system includes an open water spray nozzle.
The four-level early warning comprises a first-level early warning, a second-level early warning, a third-level early warning and a fourth-level early warning.
Further, the multi-stage early warning and fire extinguishing method comprises four-stage early warning response measures. And performing primary response aiming at primary early warning. And performing secondary response aiming at the secondary early warning. And carrying out three-level response aiming at three-level early warning. And performing four-level response aiming at four-level early warning.
Further, wherein the first order response: the temperature rise phenomenon of the battery and the temperature reduction before the thermal runaway of the battery monomer occur; second order response: a thermal runaway early warning and cooling measure in the battery module; three-stage response: open fire early warning and fire extinguishing measures in the battery module; four-stage response: thermal runaway warning and flame propagation suppression of the battery cabinet.
Further, the multi-stage early warning and fire extinguishing method further comprises a fire extinguishing method, wherein the fire extinguishing method comprises three stages, and the first stage is as follows: setting the critical spray intensity of the fire extinguishing system to ensure that open fire can be extinguished; and a second stage: after the open fire is extinguished, the early warning system transmits signals to the control system, the control system reduces the power or the pressure of a pump group in the fire extinguishing system to reduce the flow of the fire extinguishing agent, and if the heat is out of control or the flame is more intense, the power or the pressure of the pump group is increased to increase the flow of the fire extinguishing agent; and a third stage: the control system controls the electromagnetic valve of the fire extinguishing system to carry out intermittent spray cooling based on the singlechip.
Further, the primary response is thermal runaway early warning and temperature reduction of the battery monomer; the primary response is implemented by combining a distributed optical fiber temperature sensing detector, a control system and a perfluorinated hexanone fire extinguishing system on the side surface of the battery monomer; when the temperature of the battery monomer rises, the distributed optical fiber temperature-sensing detector transmits a reflected light signal to a signal processing module in the control system, once the temperature of the battery exceeds 60 ℃, the signal processing module determines the position of the battery according to a feedback signal, the alarm module sends out a primary early warning signal, the control module sends out a primary control signal, a perfluorinated hexanone fire extinguishing system of a module where the battery monomer is positioned is started, and a perfluorinated hexanone nozzle releases perfluorinated hexanone to rapidly cool the battery; and after the temperature of the battery is recovered to the normal temperature (25-40 ℃), closing the perfluorinated hexanone fire extinguishing system.
Further, the secondary response is a thermal runaway warning of the thermal runaway battery module, suppression and cooling measures of the battery module without thermal runaway; if the primary response cannot inhibit the battery self-heating reaction to cause the rupture of a single battery safety valve in the battery module, the early warning module in the battery module detects H 2 And the CO concentration and the pressure signal of the pressure sensor are sent to a control system, if the early warning factor exceeds the threshold value, the control system sends a secondary early warning signal and a secondary control signal, and the secondary fire extinguishing response is to increase the power or the pressure of the perfluorinated hexanone fire extinguishing system of the battery module with thermal runaway, and the control system is simultaneously startedStarting a perfluorinated hexanone fire extinguishing system of the battery module without thermal runaway to cool and protect the battery without thermal runaway, and preventing the smoke from triggering the thermal runaway by heat convection or heat radiation; after the battery temperature is reduced to form a platform in the cooling process, the control system sends out three-level control signals, and the singlechip controls the electromagnetic valve to take intermittent spray cooling measures according to the set parameters, so that the cooling time is prolonged, the cooling effect is enhanced, and the consumption of fire extinguishing agent is saved; preferably, the parameters include injection time, interval time, injection frequency and/or duty cycle.
Further, the three-level response is fire early warning, fire extinguishing and cooling measures of the battery module without thermal runaway; if the secondary response can not inhibit the battery from thermal runaway to generate open fire, the early warning module in the battery module sends signals to the control system through the infrared flame detector, the first smoke detector and the VOC detector, and triggers the third early warning signal and the first control signal in time; closing the perfluorinated hexanone fire extinguishing system in the thermal runaway module and opening the water mist fire extinguishing system; after the open fire is extinguished, the control system sends out a secondary control signal, the perfluorinated hexanone fire extinguishing system is closed, and meanwhile, the power or pressure of a water pump of the water mist fire extinguishing system is reduced; and finally, sending out a three-level control signal, and adopting intermittent spray cooling measures.
Further, the four-level response is a fire early warning and fire extinguishing cooling measure of the battery cabinet; if the three-stage response does not inhibit the thermal runaway propagation of the battery module, the thermal runaway propagation occurs in the battery cabinet, the linear temperature-sensitive fire detector above the battery cabinet can monitor whether the flame size exceeds the size of the battery cabinet and outwards propagates, the pressure sensor of the battery cabinet detects whether the explosion pressure generated in the battery cabinet can damage the battery cabinet, and the second smoke detector of the prefabricated cabin monitors the smoke amount; when the early warning factor exceeds a preset threshold value, a water spraying fire extinguishing system arranged at the top of a prefabricated cabin right above the battery cabinet and perfluorinated hexanone fire extinguishing systems at the two sides of the battery cabinet are started to prevent flame from spreading outwards and inhibit fire disasters of the battery cabinet.
Furthermore, the fire extinguishing agent used in the fire extinguishing system is perfluorinated hexanone and water, and the consumption of the fire extinguishing agent is comprehensively calculated according to the space volume of the battery module and the battery cabinet, the fire extinguishing design concentration, the heat generated by the battery and the heat absorption capacity of the water mist.
Further, the power (pressure) of the pump and the flow coefficient of the spray head in the automatic fire extinguishing system are required to ensure that the particle size and density of the water mist cannot influence the battery which is not out of control.
Further, the power (pressure) of the pump and the flow coefficient of the spray head in the automatic fire extinguishing system must ensure the spraying strength of the fire extinguishing agent capable of inhibiting the flame when the thermal runaway of the battery is most intense, the power (pressure) of the pump group of the fire extinguishing system is increased when the thermal runaway development becomes intense in the secondary control signal, and when the battery after the open fire is extinguished is cooled, the power (pressure) of the pump group can be properly reduced after the temperature of the battery reaches a platform to prolong the cooling time; when intermittent spray cooling is adopted in the three-stage control signal, the setting of the spraying time and the interval time must meet the condition that the temperature of the battery does not rise.
Further, each battery module in the battery cabinet is provided with an early warning system and an automatic fire extinguishing system and is uniformly connected with a control system of the battery cabinet. The automatic fire extinguishing system can take different fire extinguishing measures for different battery modules through different fire branches and electromagnetic valves.
A multi-stage early warning and fire extinguishing method for a lithium ion battery cabinet fire disaster uses a multi-stage early warning and fire extinguishing device for the battery cabinet fire disaster, and the device comprises a four-stage early warning system, a control system, a perfluorinated hexanone fire extinguishing system and a water mist fire extinguishing system.
The method mainly comprises four-stage early warning response measures, wherein the first-stage response: the temperature rise phenomenon of the battery occurs, and the temperature of the battery monomer is quickly reduced before thermal runaway occurs; second order response: early warning and rapid cooling measures for thermal runaway in the battery module; three-stage response: open fire early warning and fire extinguishing measures in the battery module; four-stage response: and (5) carrying out thermal runaway early warning and flame propagation inhibition on the energy storage cabinet. The fire extinguishing method further comprises three stages, wherein the first stage is: setting the critical spray intensity of the fire extinguishing system ensures that open fire can be extinguished rapidly; and a second stage: after the open fire is extinguished, the early warning system transmits signals to the control system, the control system reduces the power (pressure) of a pump set in the fire extinguishing system to properly reduce the flow of the fire extinguishing agent, and if the heat is out of control or the flame is more intense, the power (pressure) of the pump set is increased to increase the flow of the fire extinguishing agent; and a third stage: the control system controls the electromagnetic valve of the fire extinguishing system to carry out intermittent spray cooling based on the singlechip, so that the cooling effect of the fire extinguishing agent is further improved, and meanwhile, the consumption of most of the fire extinguishing agent can be saved.
The early warning system mainly comprises a thermal runaway early warning module in the battery module and a fire early warning module in the battery cabinet. Wherein different early warning modules set different early warning factors and response thresholds.
Furthermore, the early warning modules of different monitoring sites in the battery module use different early warning factors and are integrated in different existing sensors. Wherein the battery surface temperature is detected by a distributed optical fiber temperature sensing detector mounted at the side of the battery (which is disposed at the side surface of the battery instead of the upper surface in order to prevent damage to the battery caused by thermal runaway). The distributed optical fiber sensing technology is mainly based on the scattered light and forward light principles, and three optical effects based on the scattered light principles are usually realized, namely Rayleigh scattering, raman scattering and Brillouin scattering. The Raman scattering is mainly used for detecting temperature, the light intensity of backward Raman scattering light generated by incident pulse changes along with the temperature, the detected Stokes light and the Anti-Stokes light are demodulated to obtain the temperature along the optical fiber, and the optical fiber can be positioned according to the optical time domain reflection principle. Therefore, the distributed optical fiber temperature sensing detector not only greatly improves the early warning accuracy, but also can accurately position the failed battery.
The four-stage early warning system comprises a distributed optical fiber temperature-sensitive detector for monitoring the temperature of the battery and accurately positioning, a thermal runaway early warning module in the battery module, a linear temperature-sensitive fire detector for monitoring the fire disaster of the battery cabinet, a pressure sensor and a second smoke detector;
further, the early warning module arranged in each battery module mainly comprises an infrared flame detector and H 2 And a CO detector, a smoke first fog detector and a Volatile Organic Compound (VOC) detector for detecting the ambient temperature, flame, H in the module 2 And CO gas concentration, smoke amount, and volatile organic content.
Further, a distributed optical fiber temperature sensing detector is arranged on the surface of the battery cabinet to detect the temperature of the shell of the battery cabinet. The early warning module is provided with a stress sensor for detecting the impact force of gas generated after the thermal runaway of the battery on the battery cabinet. The top of the battery cabinet is provided with a linear temperature-sensing fire detector for detecting the flame spread size in the battery cabinet; the second smoke detector detects the amount of smoke overflowing from the battery cabinet.
Further, the early warning module is connected with the control system through a transmission line, detected signals are transmitted into the control system, and the control system processes the early warning signals. When the characteristic value detected by the early warning signal exceeds a set threshold value, the control system can give an alarm and simultaneously control the fire extinguishing system to respond.
Further, the early warning signals are provided with a first-level early warning signal, a second-level early warning signal, a third-level early warning signal and a fourth-level early warning signal aiming at the set threshold values of different safety states in the battery cabinet. And the control signals of the control system to the fire extinguishing system are classified into a primary control signal, a secondary control signal and a tertiary control signal according to the thermal runaway and flame suppression conditions.
The automatic fire extinguishing system comprises a perfluorinated hexanone fire extinguishing system, a water mist fire extinguishing system and a water spray fire extinguishing system.
Wherein, the perfluorinated hexanone system and the water mist fire extinguishing system are arranged near the battery cabinet and mainly comprise perfluorinated hexanone and water mist storage tanks, high-temperature resistant fire-fighting pipelines, booster pumps, electromagnetic valves, spray heads and the like. The spray heads of the two are arranged at the top center of each layer of battery module in the battery cabinet. The water spraying fire extinguishing system mainly comprises a water storage tank, a high-temperature resistant fire pipeline, a spraying nozzle, a booster pump, an electromagnetic valve and the like. A spray nozzle is arranged on the top of the prefabricated cabin above each battery cabinet, and a spray nozzle is arranged on the center of the top of each battery cabinet and the prefabricated cabin wall.
Further, the fire extinguishing system receives the multi-stage control signals from the control system to flexibly change the fire extinguishing conditions. And when the temperature fed back by the distributed optical fiber temperature sensing detector in the battery module exceeds the battery thermal management temperature threshold by 60 ℃, a primary early warning signal is sent out, and meanwhile, a primary control signal is sent out by a control system, and the perfluorinated hexanone fire extinguishing system releases perfluorinated hexanone through a first perfluorinated hexanone spray head according to preset pump set power and flow to cool the battery module. And after the temperature of the battery is reduced to the normal working temperature, the perfluorinated hexanone fire extinguishing system is closed.
Further, once the primary fire-extinguishing response fails to suppress the battery from warming, a series of chemical reactions occur inside the battery, generating a large amount of gas until the safety valve breaks. H in battery module 2 And when the characteristic gas concentration fed back by the CO sensor exceeds a threshold value or the feedback pressure value of the pressure sensor of the battery cabinet is greatly increased, a secondary early warning signal is sent out, and meanwhile, the control system sends out a secondary control signal, so that the pump group power or pressure of the perfluorinated hexanone fire extinguishing system is increased, and meanwhile, the perfluorinated hexanone fire extinguishing system without the thermal runaway battery module is started to cool, and the heat transfer of smoke to a non-runaway battery is prevented. If the temperature of the battery is reduced to a stable temperature platform, the control system sends out three-level control signals, and the three-level control signals are based on an Arduino development platform to start intermittent spray cooling response measures of the fire extinguishing system. According to classical boiling theory, intermittent spray cooling can provide a short time response to control heat flux by properly matching spray frequency and pulse duration during nucleate boiling heat exchange. The duty cycle, which is an important parameter affecting intermittent spray cooling performance, is defined as the percentage of the total spray cycle time that is the spray time. A fast heat flux response can be achieved with a high duty cycle and a low duty cycle can better control the cell surface temperature. Not only can improve the cooling effect, but also can save a large amount of fire extinguishing agent consumption.
Further, when the infrared flame detector in the battery module detects that flame appears or the temperature rise rate of the distributed optical fiber temperature sensing detector exceeds 1 ℃/s, the parameter of one of the VOC detector and the first smoke detector exceeds a set threshold, the control system sends out a three-level early warning signal and a one-level control signal. At this time, the booster pump of the water mist fire extinguishing system is started, the electromagnetic valve of the thermal runaway battery module where the booster pump is positioned is started, and the spray water mist suppresses flame and thermal runaway propagation. When the open fire is extinguished, the infrared flame detector feeds back a signal, the control system sends out a secondary control signal, and the perfluorinated hexanone fire extinguishing system stops working (if the temperature of the distributed optical fiber temperature-sensitive detector in the uncontrolled battery module exceeds 60 ℃, the primary response is triggered again). The power (pressure) of a booster pump of the water mist fire extinguishing system is reduced to reduce the flow of water mist, and the uncontrolled battery module is further cooled. After the water mist spraying state is stable, the control system sends out three-level control signals, and the singlechip controls the electromagnetic valve to carry out intermittent spray cooling measures, so that the cooling effect is improved, and meanwhile, the cooling time is increased and the water quantity is saved.
Further, when the three-stage response measures cannot inhibit the thermal runaway propagation of the battery cabinet, the linear temperature-sensitive fire detector above the battery cabinet detects that flame exceeds the size of the battery cabinet or the second smoke detector on the prefabricated bulkhead surface detects that the smoke amount overflowed from the battery cabinet and the pressure value detected by the pressure sensor exceeds a set threshold, the water spray fire extinguishing system is started, and the open water spray nozzle above the battery cabinet releases water mist to extinguish and cool. And meanwhile, the second perfluorinated hexanone spray head on the shed roof between the battery cabinets releases perfluorinated hexanone to prevent flame from spreading to surrounding battery cabinets.
The invention has the advantages that: 1. the early warning and fire extinguishing method provides a four-stage early warning mechanism, covers three levels of a battery monomer, a module and a battery cabinet, monitors four stages of early thermal runaway, thermal runaway triggering, open fire generation and large-scale fire spreading of the battery in real time and sends out four-stage early warning signals. 2. The multi-parameter early warning factors used in the early warning and fire extinguishing method comprise the surface temperature of the battery, the internal temperature of the module, flame signals, smoke quantity, VOC, pressure and the like, and the accuracy of the early warning system is greatly improved. 3. The early warning and fire extinguishing method provides a four-level response mechanism, adopts fire extinguishing measures such as perfluorinated hexanone, water mist, water spray and the like aiming at a four-level early warning signal, and can effectively inhibit the thermal runaway propagation of the battery. 4. The early warning and fire extinguishing method flexibly changes the working conditions of power (pressure), duty ratio, frequency and the like of the pump at different stages in the fire extinguishing process, further improves the fire extinguishing and cooling effects, and saves energy and the consumption of fire extinguishing agents.
Drawings
Fig. 1 is a schematic layout diagram of an early warning fire extinguishing system in a battery module, wherein 1 is the battery module, 2 is the early warning module, 3 is a battery cell, 4 is a distributed optical fiber temperature sensing detector, 5 is a first perfluorinated hexanone spray head, and 6 is a water mist spray head.
Fig. 2 is a schematic diagram of an arrangement of a warning fire extinguishing system in a battery cabinet, wherein 7 is a battery cabinet, 8 is a transmission line, 9 is a control system, 10 is a single chip microcomputer, 11 is an automatic fire extinguishing system, 12 is a perfluorinated hexanone fire extinguishing agent storage tank, 13 is a water storage tank, 14 is a booster pump, 15 is a water pump, 16 is a fire-fighting pipeline, 17, 18 and 19 are respectively a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve of the perfluorinated hexanone fire extinguishing system, and 20, 21 and 22 are respectively a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve of the water mist fire extinguishing system.
Fig. 3 is a schematic diagram of an external warning fire extinguishing system of a battery cabinet, wherein 23 is a prefabricated cabin, 24 is an open water spray nozzle, 25 is a second perfluorinated hexanone nozzle, 26 is a linear temperature-sensitive fire detector, 27 is a pressure sensor, 28 is a second smoke detector, and 29 is a vent.
Fig. 4 is a design idea diagram of a battery cabinet early warning fire extinguishing system.
Fig. 5 is a control flow chart of a battery cabinet multi-stage early warning fire extinguishing method.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
The multi-stage early warning and fire extinguishing method for the lithium ion battery cabinet fire disaster mainly comprises the following steps: the method uses a battery cabinet fire multi-stage early warning and extinguishing system. As shown in fig. 1-3, the early warning fire extinguishing system comprises a four-stage early warning system, a control system 9 and an automatic fire extinguishing system 11. The four-stage early warning system is mainly used for carrying out real-time monitoring early warning on different stages before and after three layers of thermal runaway of the battery cell 3, the battery module 1 and the battery cabinet 7.
The battery module 1 includes a plurality of battery cells 3. The battery module 1 is located in a battery cabinet 7. Each battery module 1 in the battery cabinet is provided with a four-stage early warning system and an automatic fire extinguishing system 11 and is uniformly connected with a control system 9 of the battery cabinet. The automatic fire extinguishing system 11 can take different fire extinguishing measures for different battery modules 1 through different fire branches and electromagnetic valves.
The four-stage early warning system comprises a distributed optical fiber temperature sensing detector, a battery module thermal runaway early warning module, a linear temperature sensing fire detector 26, a pressure sensor 27 and a second smoke detector 28.
The sensors of the four-stage early warning system are arranged at different positions in and around the battery cabinet, and the types, early warning factors and early warning thresholds used are different. The sensor before the thermal runaway of the battery monomer 3 is mainly a distributed optical fiber temperature-sensitive detector 4, and the function of the sensor can accurately judge the temperature and the position of the self-heating reaction battery in real time. The distributed optical fiber temperature sensing detector 4 is arranged on the side surface of each battery monomer 3 and is used for monitoring the temperature change of the battery monomer and determining the position of the battery with the temperature rise phenomenon, namely the primary early warning. The early warning module 2 for monitoring the thermal runaway of the battery module 1 mainly comprises an infrared flame detector and H 2 And the CO sensor, the VOC detector and the first smoke detector are arranged at the top corner of the battery module, and the accuracy of the early warning system can be greatly improved through coupling early warning of various parameters. H in battery module thermal runaway early-warning module 2 2 And the CO sensor and the pressure sensor on the surface of the battery cabinet are respectively used for detecting the concentration of the characteristic gas and the generated pressure after the battery safety valve is opened, and the secondary early warning is realized. The infrared flame detector, the first smoke detector and the VOC detector in the thermal runaway early warning module capture open fire generated in the battery module 1, namely three-level early warning. The sensors of the battery cabinet 7 mainly comprise a line-type heat fire detector 26 directly above it, a pressure sensor 27 at the surface and a second smoke detector 28 at the surface of the prefabricated cabin 23. The surface of the battery cabinet is provided with a pressure sensor 27, a second smoke detector 28 is arranged on the wall of the nearby prefabricated cabin, and a linear heat fire detector 26 is arranged at the top of the upper prefabricated cabin and used for detecting large-scale thermal runaway propagation in the battery cabinet, namely four-stage early warning. The four-level early warning layer by layer progresses, and four-level fire extinguishing responses can be made for different states of thermal runaway of different battery levels.
The control system 9 comprises a signal processing module, an alarm module and a control module. The input end of the control system 9 is connected with the early warning system through a transmission line 8, and the output end is connected with the automatic fire extinguishing system 11. The signal processing module is responsible for receiving and processing the detection signal of the early warning system, and is used for processing and analyzing the early warning signal received from the transmission line 8, and once the early warning signal exceeds a set threshold value, an alarm is triggered, and the alarm module sends out an early warning signal of a corresponding level and simultaneously controls the fire extinguishing system to perform corresponding measures. The control module comprises a singlechip 10 and other elements and is used for controlling the fire extinguishing system to take measures such as intermittent spray cooling. The control module controls the fire extinguishing system to take response measures with different grades according to the early warning signals with different grades, and can flexibly change the fire extinguishing method according to different thermal runaway states in the battery cabinet.
The automatic fire extinguishing system 11 comprises a perfluorinated hexanone fire extinguishing system, a water mist fire extinguishing system and a water spray fire extinguishing system. The perfluorinated hexanone fire extinguishing system consists of a perfluorinated hexanone storage tank, a booster pump 14, a fire-fighting pipeline 16, an electromagnetic valve and a perfluorinated hexanone spray head. The water mist fire extinguishing system consists of a water storage tank 13, a water pump 15, a fire pipeline 16, an electromagnetic valve and a water mist spray head 6. The water spray fire extinguishing system consists of a water storage tank 13, an open water spray nozzle 24 and a fire-fighting pipeline 16. The automatic fire extinguishing system 11 is controlled by the control system 9. Wherein, the perfluorinated hexanone fire extinguishing agent storage tank 12 and the water storage tank 13 near the battery cabinet 7 are respectively connected with the booster pump 14 and the water pump 15 through the fire-fighting pipeline 16, and meanwhile, the power (pressure) of the pump group is controlled by the control system 9. Then, the fire-fighting pipeline 16 is divided into a plurality of lines, and the lines are connected with the first perfluorinated hexanone spray head 5 and the water mist spray head 6 in the battery module 1 through electromagnetic valves (17-22). The perfluorinated hexanone fire extinguishing system can perform cooling measures against the self-heating reaction of the battery monomer 3 to exceed a thermal management temperature interval, and the battery cannot be damaged due to the fact that the conductivity of the perfluorinated hexanone fire extinguishing system is 0. If the perfluorinated hexanone fire extinguishing system cannot inhibit thermal runaway of the battery, open fire is generated in the battery module 1, the water mist fire extinguishing system releases water mist to inhibit flame through the water mist spray nozzle 6, thermal runaway propagation in the battery module 1 is prevented, and the remaining first perfluorinated hexanone spray nozzle 5 in the battery module 1 which does not generate thermal runaway releases perfluorinated hexanone for cooling, so that flame and high-temperature flue gas are prevented from igniting the battery. Once large-scale thermal runaway propagation occurs in the battery cabinet 7, a water spraying fire extinguishing system and a perfluorinated hexanone fire extinguishing system outside the battery cabinet 7 are started to prevent flames from spreading all around. An open water spray nozzle 24 is mounted directly above the battery cabinets 7 and a second perfluorinated hexanone nozzle 25 is mounted at the top of the prefabricated cabin 23 between the two battery cabinets 7.
The battery cabinet 7 is provided with a vent 29.
As shown in fig. 4-5, the main implementation process of the multi-stage fire early warning and extinguishing method of the lithium ion battery cabinet is as follows:
when the temperature of the battery cell 3 in a certain battery module 1 in the battery cabinet 7 exceeds 60 ℃, the distributed optical fiber temperature sensing detector 4 can accurately position the position of the battery cell 3 and transmit acquired data to the control system 9, and the control system 9 sends out a primary early warning signal and a primary control signal. The perfluorinated hexanone fire extinguishing system is started, a first electromagnetic valve 17 of the perfluorinated hexanone fire extinguishing system corresponding to the battery module 1 where the battery monomer 3 is positioned is opened, and the perfluorinated hexanone in the perfluorinated hexanone fire extinguishing agent storage tank 12 is released from a first perfluorinated hexanone spray head 5 in the battery module 1 through a fire-fighting pipeline 16 after the pressurization of a booster pump 14, so that the battery is cooled. And stopping the perfluorinated hexanone fire extinguishing system after the temperature of the battery monomer 3 is recovered to be normal.
If the self-heating reaction of the battery cell 3 is not inhibited after the first-order response, the safety valve of the battery cell 3 is ruptured. A great amount of combustible gas is generated in the thermal runaway battery module 1, the pressure sensor 27 on the surface of the battery cabinet 7 senses a sharply rising pressure signal, and the early warning module 2 can simultaneously detect high-content H in the flue gas 2 And the CO concentration is fed back to the control system 9. The control system 9 sends out a secondary early warning signal and a secondary control signal, the power of the booster pump 14 of the perfluorinated hexanone fire extinguishing system corresponding to the battery module 1 where the battery unit 3 is positioned is increased, and meanwhile, the perfluorinated hexanone fire extinguishing system of the battery module 1 which is not out of control is started. After the battery temperature forms a stable platform, the control system 9 sends out three-level control signals, the singlechip 10 controls the first electromagnetic valve 17, the second electromagnetic valve 18 and the third electromagnetic valve 19 of the perfluorinated hexanone fire extinguishing system according to preset spraying time and interval time, and intermittent spraying cooling measures are adopted, so that the cooling effect of the perfluorinated hexanone can be improved, and the consumption of fire extinguishing agent is reduced.
If the secondary response is followed, thermal runaway of the battery cell 3 is not inhibited until it is in fire. Open flame, a large amount of fumes, and unreacted Volatile Organic Compounds (VOCs) will occur in the battery module 1 where thermal runaway occurs. The sensors in the early warning module 2 transmit the data of the early warning factors to the control system 9, and when the values of the early warning factors exceed the set early warning threshold values, the control system 9 sends out three-level early warning signals and one-level control signals. At the moment, the three-stage response triggers, and the water mist fire extinguishing system of the thermal runaway battery module 1 is started. The water in the water storage tank 13 is released from the water mist spray head 6 in the battery module 1 through the fire control pipeline 16 under the action of the water pump 15, so that the open fire is extinguished at the first time, the battery module 1 is cooled rapidly, and the thermal runaway is prevented from spreading. After the open fire is extinguished, an infrared flame detector in the early warning module 2 feeds back a signal to the control system 9, the control system 9 sends out a secondary control signal, the perfluorinated hexanone fire extinguishing system of the battery module which does not generate thermal runaway stops, the power (pressure) of a water pump 15 in the water mist fire extinguishing system is downwards regulated to a cooling mode, and the water mist needs to ensure that the water mist has larger spray strength until the flame and high-temperature smoke reach the flame root of the safety valve because the battery jet fire contains larger impact force. And after the open flame is extinguished, the pressure can be reduced to prolong the cooling time when the battery is cooled. After the power (pressure) of the water pump 15 is regulated, the control system 9 sends out three-level control signals, and the singlechip 10 controls the first electromagnetic valve 20 of the water mist fire extinguishing system to take intermittent spray cooling measures according to preset spraying time and interval time, so that the cooling time can be further prolonged, and the water quantity is saved. Most importantly, intermittent spray cooling can improve the cooling effect of water mist and prevent the afterburning and thermal runaway propagation of the battery.
If the fire is not restrained in the battery cabinet 7 after the first three-stage fire extinguishing response, large-scale thermal runaway propagation and even flame propagation from the battery cabinet 7 to the periphery occur in the battery cabinet 7. The pressure sensor 27 on the surface of the casing of the battery cabinet 7 is used for monitoring the explosion pressure of the gas when the thermal runaway occurs in the battery cabinet 7 to judge the intensity of the thermal runaway propagation and whether the damage pressure threshold value of the casing of the battery cabinet 7 is possibly exceeded, the linear temperature-sensitive fire detector 26 right above the battery cabinet 7 is used for monitoring whether the flame of the battery cabinet 7 is spread outwards, and the second smoke detector 28 on the wall of the prefabricated cabin 23 is used for monitoring the smoke quantity generated by the thermal runaway of the battery in the battery cabinet 7. Once the three early warning factors exceed a set threshold, the water spray fire extinguishing system is started. The open water spray nozzles 24 above the battery cabinet 7 are opened, and simultaneously, the second perfluorinated hexanone spray nozzles 25 on the top of the prefabricated cabin 23 on both sides of the battery cabinet 7 release perfluorinated hexanone to extinguish overflowed flames, and a low-oxygen and low-temperature environment is manufactured around the battery cabinet 7.
The present embodiment is merely an example of the present invention and does not limit the scope of protection thereof. Modifications and alterations will be apparent to those skilled in the art without departing from the principles of this invention.
Claims (2)
1. A multi-stage early warning and fire extinguishing method for fire disaster of a lithium ion battery cabinet is characterized in that: the method uses a battery cabinet fire multi-stage early warning and extinguishing device, wherein the device comprises a four-stage early warning system, a control system and an automatic extinguishing system;
the four-stage early warning system carries out real-time monitoring early warning aiming at different stages before and after three layers of thermal runaway of a battery cell, a battery module and a battery cabinet; the battery module comprises a plurality of battery monomers and is arranged in the battery cabinet;
the four-stage early warning system comprises a distributed optical fiber temperature sensing detector, a battery module thermal runaway early warning module, a linear temperature sensing fire detector, a pressure sensor and a second smoke detector;
the distributed optical fiber temperature sensing detector is arranged on the side surface of each battery monomer and is used for monitoring the temperature change of each battery monomer and determining the position of the battery with the temperature rise phenomenon, namely primary early warning;
the battery module thermal runaway early warning module comprises an infrared flame detector and H 2 And a CO sensor, a first smoke detector, and a VOC detector;
h in battery module thermal runaway early warning module 2 The CO sensor and the pressure sensor on the surface of the battery cabinet are respectively used for detecting the concentration of the characteristic gas and the generated pressure after the battery safety valve is opened, namely, the secondary early warning; heat of the bodyThe infrared flame detector, the first smoke detector and the VOC detector in the out-of-control early warning module capture open flame generated in the battery module, namely three-level early warning; the surface of the battery cabinet is provided with a pressure sensor, the wall of the prefabricated cabin adjacent to the battery cabinet is provided with a second smoke detector, and the top of the prefabricated cabin above the battery cabinet is provided with a linear temperature-sensitive fire detector for detecting the thermal runaway propagation in the battery cabinet, namely, four-stage early warning; the four-level early warning layer by layer is progressive, and four-level fire extinguishing response can be made for different states of thermal runaway of different battery levels;
the control system comprises a signal processing module, an alarm module and a control module; the input end of the control system is connected with the early warning system, and the output end of the control system is connected with the automatic fire extinguishing system; the signal processing module is in charge of receiving and processing detection signals of the early warning system, and when the signals exceed a preset threshold value, the alarm module sends out early warning signals of corresponding grades; the control module controls the fire extinguishing system to take response measures of different grades according to the early warning signals of different grades or controls the fire extinguishing system to change the fire extinguishing method according to different thermal runaway states in the battery cabinet;
the automatic fire extinguishing system comprises a perfluorinated hexanone fire extinguishing system, a water mist fire extinguishing system and a water spray fire extinguishing system, and is controlled by the control system;
the perfluorinated hexanone fire extinguishing system comprises a perfluorinated hexanone storage tank, a booster pump, a fire-fighting pipeline, an electromagnetic valve and a perfluorinated hexanone spray head; the water mist fire extinguishing system comprises a water storage tank, a water pump and a water mist spray head; the water spray fire extinguishing system comprises an open water spray nozzle;
the multi-stage early warning and fire extinguishing method comprises four stages of early warning response measures, wherein one stage of response: the temperature rise phenomenon of the battery and the temperature reduction before the thermal runaway of the battery monomer occur; second order response: a thermal runaway early warning and cooling measure in the battery module; three-stage response: open fire early warning and fire extinguishing measures in the battery module; four-stage response: thermal runaway warning and flame propagation inhibition of the battery cabinet;
the multi-stage early warning and fire extinguishing method further comprises a fire extinguishing method, wherein the fire extinguishing method comprises three stages, and the first stage is as follows: setting the critical spray intensity of the fire extinguishing system to ensure that open fire can be extinguished; and a second stage: after the open fire is extinguished, the early warning system transmits signals to the control system, the control system reduces the power or the pressure of a pump group in the fire extinguishing system to reduce the flow of the fire extinguishing agent, and if the heat is out of control or the flame is more intense, the power or the pressure of the pump group is increased to increase the flow of the fire extinguishing agent; and a third stage: the control system controls the electromagnetic valve of the fire extinguishing system to carry out intermittent spray cooling based on the singlechip;
the secondary response is a thermal runaway early warning of the thermal runaway battery module, restraining and cooling measures of the battery module without thermal runaway; if the primary response cannot inhibit the battery self-heating reaction to cause the rupture of a single battery safety valve in the battery module, the early warning module in the battery module detects H 2 And the CO concentration and the pressure signal of the pressure sensor are sent to a control system, if the early warning factor exceeds a threshold value, the control system sends a secondary early warning signal and a secondary control signal, and the secondary fire extinguishing response is to increase the power or the pressure of the perfluorinated hexanone fire extinguishing system of the battery module without thermal runaway, and simultaneously, the perfluorinated hexanone fire extinguishing system of the battery module without thermal runaway is started to cool and protect the battery without thermal runaway, so that the thermal runaway of the smoke is prevented from being caused by thermal convection or thermal radiation; after the temperature of the battery is reduced to form a platform in the cooling process, the control system sends out three-level control signals, and the singlechip controls the electromagnetic valve to take intermittent spray cooling measures according to the set parameters; the parameters include injection time, interval time, injection frequency, and/or duty cycle;
the third-level response is fire early warning, fire extinguishing and cooling measures of the battery module without thermal runaway; if the secondary response can not inhibit the battery from thermal runaway to generate open fire, the early warning module in the battery module sends signals to the control system through the infrared flame detector, the first smoke detector and the VOC detector, and triggers the third early warning signal and the first control signal in time; starting a water mist fire extinguishing system of the battery module with thermal runaway; after the open fire is extinguished, the control system sends out a secondary control signal, the perfluorinated hexanone fire extinguishing system of the battery module without thermal runaway stops, and meanwhile, the power or the pressure of a water pump of the water mist fire extinguishing system is reduced; finally, sending out three-level control signals, and adopting intermittent spray cooling measures;
the fourth-level response is fire early warning and fire extinguishing cooling measures of the battery cabinet; if the three-stage response does not inhibit the thermal runaway propagation of the battery module, the thermal runaway propagation occurs in the battery cabinet, the linear temperature-sensitive fire detector above the battery cabinet can monitor whether the flame size exceeds the size of the battery cabinet and outwards propagates, the pressure sensor of the battery cabinet detects whether the explosion pressure generated in the battery cabinet can damage the battery cabinet, and the second smoke detector of the prefabricated cabin monitors the smoke amount; when the three early warning factors exceed a preset threshold value, a water spraying fire extinguishing system arranged at the top of a prefabricated cabin right above the battery cabinet and perfluorinated hexanone fire extinguishing systems at the two sides of the battery cabinet are started to prevent flame from spreading outwards and inhibit fire disasters of the battery cabinet;
the fire extinguishing agent used in the fire extinguishing system is perfluoro-hexanone and water, and the consumption of the fire extinguishing agent is comprehensively calculated according to the space volume of the battery module and the battery cabinet, the fire extinguishing design concentration, the heat generated by the battery and the heat absorption capacity of the water mist;
the power of a pump and the flow coefficient of a spray head in the automatic fire extinguishing system need to ensure that the particle size and the density of water mist cannot influence a battery which is not out of control;
the power of a pump in the automatic fire extinguishing system and the flow coefficient setting of a spray head must ensure the spray strength of the fire extinguishing agent capable of inhibiting the flame when the thermal runaway of the battery is most intense, the power of a pump set of the fire extinguishing system is increased when the development of the thermal runaway becomes intense in a secondary control signal, and when the battery after the open fire is extinguished is cooled, the power of the pump set can be properly reduced after the temperature of the battery reaches a platform to prolong the cooling time; when intermittent spray cooling is adopted in the three-level control signal, the setting of the spraying time and the interval time must meet the condition that the temperature of the battery does not rise;
each battery module in the battery cabinet is provided with an early warning system and an automatic fire extinguishing system which are uniformly connected with a control system of the battery cabinet, and the automatic fire extinguishing system can take different fire extinguishing measures for different battery modules through different fire branches and electromagnetic valves.
2. The multi-stage early warning and fire extinguishing method for fire disaster of lithium ion battery cabinet as claimed in claim 1, wherein the method comprises the following steps: the primary response is thermal runaway early warning and temperature reduction of the battery monomer; the primary response is implemented by combining a distributed optical fiber temperature sensing detector, a control system and a perfluorinated hexanone fire extinguishing system on the side surface of the battery monomer; when the temperature of the battery monomer rises, the distributed optical fiber temperature-sensing detector transmits a reflected light signal to a signal processing module in the control system, once the temperature of the battery exceeds 60 ℃, the signal processing module determines the position of the battery according to a feedback signal, the alarm module sends out a primary early warning signal, the control module sends out a primary control signal, a perfluorinated hexanone fire extinguishing system of a module where the battery monomer is positioned is started, and a perfluorinated hexanone spray head releases perfluorinated hexanone to cool the battery; and after the temperature of the battery is recovered to 25-40 ℃, closing the perfluorinated hexanone fire extinguishing system.
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| CN115648371A (en) * | 2022-10-31 | 2023-01-31 | 宁夏极客空间建筑科技有限公司 | Temperature control system and control method for preparing grape vine artificial board |
| CN115621578B (en) * | 2022-11-15 | 2023-03-31 | 深圳海润新能源科技有限公司 | Linkage control system and method for battery cluster |
| CN115869563A (en) * | 2022-11-21 | 2023-03-31 | 楚能新能源股份有限公司 | Fire-fighting system for energy storage container and fire-fighting early warning control method |
| CN115920277A (en) * | 2022-11-25 | 2023-04-07 | 中国科学技术大学 | Fire extinguishing and cooling system of prefabricated cabin type lithium battery energy storage system and control method |
| CN115953873A (en) * | 2023-01-17 | 2023-04-11 | 华侨大学 | Early warning method and system for new energy storage power station |
| CN115970200B (en) * | 2023-03-17 | 2023-06-13 | 南京珉琛智能装备科技有限公司 | Fire extinguishing agent automatic fire extinguishing control system and method based on storage battery operation detection |
| CN116027206A (en) * | 2023-03-29 | 2023-04-28 | 安徽中科中涣智能装备股份有限公司 | Multi-element perception grading early warning intelligent monitoring system based on station-level energy storage |
| CN117077556B (en) * | 2023-07-07 | 2024-04-16 | 中国石油大学(华东) | Fire spread modeling method for coupling network model lithium ion battery energy storage system |
| CN116650870B (en) * | 2023-08-01 | 2023-10-03 | 远山建安技术有限公司 | Energy storage device box energy storage power station |
| CN117477077A (en) * | 2023-12-26 | 2024-01-30 | 中国华能集团清洁能源技术研究院有限公司 | Battery thermal runaway judging method, device and battery system |
| CN117523809B (en) * | 2024-01-08 | 2024-03-12 | 四川千页科技股份有限公司 | Fire monitoring, evaluating and managing method for lithium ion battery energy storage station |
| CN117679694B (en) * | 2024-02-04 | 2024-04-09 | 东营昆宇电源科技有限公司 | Fire-fighting pipeline control system for energy storage battery compartment |
| CN117815601A (en) * | 2024-03-05 | 2024-04-05 | 四川特威特消防科技有限公司 | Perfluoro-hexanone multi-stage fire extinguishing device for electrical cabinet |
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| CN109432634B (en) * | 2018-10-08 | 2020-08-28 | 中国科学技术大学 | Fire fighting method of container type lithium ion battery energy storage system |
| CN110828935B (en) * | 2019-11-14 | 2023-04-07 | 中国科学技术大学 | Safety protection method for lithium ion battery electric vehicle |
| CN110911772A (en) * | 2019-12-03 | 2020-03-24 | 中国科学技术大学 | Early warning method for thermal runaway of power lithium ion battery |
| CN111494841A (en) * | 2020-04-24 | 2020-08-07 | 中国科学技术大学 | Lithium ion battery fire early warning and extinguishing device are stored in warehouse |
| CN113332640A (en) * | 2021-06-03 | 2021-09-03 | 安徽中科久安新能源有限公司 | Fire suppression program-controlled injection strategy for electrochemical energy storage system |
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