CN114569919A - Lithium battery afterburning prevention fire extinguishing device and fire extinguishing agent economic injection method thereof - Google Patents
Lithium battery afterburning prevention fire extinguishing device and fire extinguishing agent economic injection method thereof Download PDFInfo
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- CN114569919A CN114569919A CN202210480884.XA CN202210480884A CN114569919A CN 114569919 A CN114569919 A CN 114569919A CN 202210480884 A CN202210480884 A CN 202210480884A CN 114569919 A CN114569919 A CN 114569919A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- 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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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C37/00—Control of fire-fighting equipment
- A62C37/50—Testing or indicating devices for determining the state of readiness of the equipment
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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
Abstract
The invention relates to a lithium battery afterburning prevention fire extinguishing device and an economic fire extinguishing agent spraying method, wherein the device comprises one or more infrared temperature monitoring modules, a communication control power supply bus, an alarm linkage host, a fire extinguishing agent nozzle, an electromagnetic valve and a fire extinguishing agent container; the infrared temperature monitoring module is connected in series on the industrial bus for use, so that temperature early warning of a single alarm host computer for multiple spaces and multiple monitoring angles of the single space is realized, and early warning discovery of lithium battery fire is quicker and after-burning discovery and disposal are more timely. The monitoring distance of the device is short, the temperature monitoring module can ensure the monitoring effect by using the low-resolution infrared array sensor, and the combined use can improve the covering effect and greatly reduce the cost; the infrared temperature monitoring modules connected in series carry out power supply and communication through the bus, so that complex network wiring installation engineering is avoided, and the system is more suitable for refitting and integrating small-space equipment; the method of multiple on-demand fire suppressant sprays makes the fire suppressant more cost effective to use.
Description
Technical Field
The invention relates to the technical field of lithium battery afterburning prevention, in particular to a lithium battery afterburning prevention fire extinguishing device and an economic fire extinguishing agent spraying method thereof.
Background
In the production, test and application fields related to storage and charging of lithium ion batteries, charging and discharging or static storage behaviors of lithium batteries or lithium-containing battery products are often required to be performed in a closed space, for example, some tests in research and development laboratories of battery production enterprises are performed in various simulated environment test boxes and explosion-proof test boxes; the outdoor common automatic power-exchanging cabinet for the electric automobile and even the energy storage container using the lithium battery can store and charge a large amount of lithium batteries in a closed space. However, due to the characteristics of lithium batteries, lithium battery products cannot be used safely. In the application, a matched fire monitoring device and a matched fire extinguishing device are often required to be added.
Because the lithium cell spontaneous combustion is in the twinkling of an eye, can spout a large amount of dense smoke even flame, above-mentioned fire monitoring devices usually regard smoke alarm as the signal source, and the perception battery fires the back and triggers the action, but smoke alarm need can discover and report to the police after the battery is out of control, can't realize accident early warning prevention function. In some applications, a thermocouple or a thermal resistance type temperature measuring device may be attached to the surface of the battery to identify the battery before overcharging, but these devices are limited to a small number of battery cells to be tested, the number of batteries is large, or the operation of the battery pack in this way is very difficult.
In the aspect of applying fire extinguishing agents, fire extinguishing consumables applied in the industry when extinguishing battery fires include spraying water, aerosol fire extinguishers, carbon dioxide spraying for cooling, heptafluoropropane spraying fire extinguishing agents and recently emerging perfluorohexanone spraying fire extinguishing agents. Water is the best known way to extinguish fires, but cannot be used in situations where electrical equipment is present in the installation. The better the effect of the gas fire extinguishing agent is, the higher the application price is, such as perfluorohexanone which is environment-friendly and has excellent fire extinguishing effect, the rapid popularization and application of the gas fire extinguishing agent are limited due to the cost. The high price of application is not only because such clean extinguishing agents are themselves expensive, but also because it is difficult to manage the effective extinguishing dose when spraying.
Because lithium ion batteries, especially batteries with large capacity and large volume, all have core temperature rising sharply and penetrating to the battery surface when a fire disaster occurs, fire extinguishing of the batteries not only needs to extinguish open fire, but also needs to cool the batteries thoroughly to the core inside the batteries. If the battery can not be cooled continuously after the fire is extinguished until the core temperature in the out-of-control battery is reduced to be safe and does not generate heat any more, the internal energy of the battery can continuously react and be transmitted to the outer surface, and secondary fire is initiated. Therefore, the key of extinguishing fire by the lithium ion battery is preventing and extinguishing secondary and repeated combustion. For lithium ion battery fire disasters in open occasions, a large amount of water is used for continuously cooling and covering to extinguish the fire disasters, and spraying and preventing are continuously carried out after open fire is extinguished. However, for a closed space containing high-value electrical components and applied with a lithium battery, which is not suitable for extinguishing fire with water, the industry uses a clean and efficient fire extinguishing agent to perform excessive spraying and continuously submerge the space for a long time so as to achieve the purpose of preventing the battery from reburning.
This kind of fire extinguishing mode can't discern fire control effect, also is indiscriminate injection to only needing less fire extinguishing agent controllable low capacity, low state of charge battery, in addition, lacks further monitoring perception ability to the condition of a fire intensity of a fire after the conflagration triggers, need wait for long time and do not have the unusual can be confirmed to dispose and finish. That is, the current fire extinguishing apparatus system for lithium ion battery fire is very uneconomical and not intelligent.
In the patent nos.: 202022637075.4, a lithium ion battery fire automatic alarm and automatic fire extinguishing device is disclosed. According to the invention, the wireless alarm smoke detector is arranged in the explosion-proof cabinet to sense the lithium battery fire, and the liquid carbon dioxide bottle is used for spraying carbon dioxide aerosol to extinguish the fire. As previously mentioned, smoke detectors find fires but are difficult to protect against not "burning"; the cooling and fire extinguishing effects achieved by carbon dioxide fire extinguishing can be good when dealing with the centralized storage of small lithium ion batteries, the industry proves the cooling effect when dealing with large battery modules and systems, the cooling is difficult to act on the local limitation of battery firing and combustion, and the secondary afterburning is difficult to effectively prevent.
Application No. 202010466904.9 discloses a perfluorohexanone quick fire extinguishing device and a fire extinguishing system, wherein a smoke alarm is used as a fire signal source, and when a fire breaks out, all the fire extinguishing agents with good effect and high cost are used again, so that the economy is general; a small amount of batteries which do not reburn cannot be distinguished from a large amount of dense battery stacks which can reburn for multiple times, secondary reburning of the batteries after extinguishment can be caused without using a sufficient amount of extinguishing agent, and a large amount of waste of the extinguishing agent can be caused by using a sufficient amount of extinguishing agent.
Application No. 201610942209.9 discloses an automatic fire extinguishing effect monitoring and re-ignition preventing system and method for a fire monitor, which uses an infrared thermal imager on a water monitor as an information acquisition unit and a position acquisition unit of a fire disaster, and realizes the fire extinguishing action of the water monitor by linking a high-pressure water gun during the fire disaster. The water cannon can prevent the re-combustion, and the method is that a large amount of water flow is directly sprayed to the fire position. However, the fire extinguishing agent of the water cannon is not insulated, the directional jet flow part of the water cannon is complex and large in size and high in cost, the fire control under a large-space scene is effective, and the water cannon is difficult to develop for a storage scene in a lithium battery box inner chamber which has a small depth and needs insulation fire extinguishing. Although the industry has simply analogized that a fire water monitor type jet device is arranged in a closed space, and water flow is changed into jetting other fire extinguishing agents, the infrared detection is easy to be shielded, large coverage area is realized without effective detection depth, a high-bandwidth communication network is difficult to be arranged in a small space, and the infrared detection has no economic feasibility for the small space without detection depth and is not well applied;
the lithium battery re-ignition preventing and extinguishing device and the fire extinguishing agent economic spraying method thereof have the advantages that the pre-warning capacity of preventing the fire from being damaged and not being combusted is increased for a lithium ion battery fire extinguishing system at lower cost, the capacity of the fire extinguishing system for coping with the fire re-ignition of the lithium ion battery can be increased, meanwhile, the fire extinguishing agent is effectively saved, and the effectiveness ratio of the high-efficiency cleaning fire extinguishing agent is improved.
Disclosure of Invention
The invention aims to solve the technical problem of providing a lithium battery afterburning prevention and fire extinguishing device and an economic fire extinguishing agent spraying method thereof aiming at the defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the method comprises the steps of constructing a lithium battery afterburning prevention and fire extinguishing device, wherein the lithium battery afterburning prevention and fire extinguishing device comprises one or more infrared temperature monitoring modules, a communication control power supply bus, an alarm linkage host, fire extinguishing agent nozzles corresponding to the infrared temperature monitoring modules, electromagnetic valves corresponding to the fire extinguishing agent nozzles and fire extinguishing agent containers;
the infrared temperature monitoring module and the electromagnetic valve are electrically connected with and controlled by the alarm linkage host through a communication control power supply bus;
the fire extinguishing agent container is connected with a fire extinguishing agent pipeline, the fire extinguishing agent nozzles are connected with the fire extinguishing agent pipeline, and the electromagnetic valves are used for controlling the fire extinguishing agent nozzles to be started and closed in a one-to-one correspondence manner;
the infrared temperature monitoring module applies a low-resolution area array type infrared temperature sensor and a microprocessor, can perform area type covered infrared temperature detection on a target from different angles, and reports a temperature monitoring result to the alarm linkage host through a bus;
the alarm linkage host is used for inquiring the monitoring temperature data of each infrared temperature monitoring module, when the temperature data monitored by the infrared temperature monitoring modules in the plurality of infrared temperature monitoring modules meet the set alarm conditions, alarming is carried out, when the temperature data monitored by each infrared temperature monitoring module in the plurality of infrared temperature monitoring modules meets the set reset condition, the alarm is cancelled, when the temperature data monitored by the infrared temperature monitoring modules in the infrared temperature monitoring modules meet the set first action condition, the electromagnetic valve is opened to extinguish the fire, when all the infrared temperature monitoring modules in the plurality of infrared temperature monitoring modules monitor temperature data and meet the set re-ignition preventing standby condition, the electromagnetic valves are closed and the re-ignition preventing standby state is entered, and when the infrared temperature monitoring module in the infrared temperature monitoring modules monitors that the temperature data meets the set re-combustion preventing action condition, the electromagnetic valve is opened to extinguish the fire.
The invention relates to a lithium battery afterburning prevention fire extinguishing device, wherein an alarm linkage host comprises an audible and visual alarm, a bus interface and a control circuit board, and a microprocessor, an audible and visual alarm control circuit and a wireless communication module are arranged on the control circuit board;
the microprocessor is used for scheduling a data bus of the management and infrared temperature monitoring module, judging alarm, triggering an audible and visual alarm to alarm, controlling the wireless communication module to upload corresponding alarm data and controlling the relay to output linkage fire extinguishing logic;
and the bus interface is used for being connected to the infrared temperature monitoring modules and the control signal interface of the electromagnetic valve.
The invention relates to a lithium battery afterburning prevention fire extinguishing device, wherein a manual ball valve is arranged on a fire extinguishing agent spray head.
The invention relates to a lithium battery afterburning prevention fire extinguishing device, wherein a fire extinguishing agent pressure gauge for detecting the internal pressure of a fire extinguishing agent container is arranged on the fire extinguishing agent container.
The invention relates to a lithium battery afterburning prevention fire extinguishing device, wherein a perfluorohexanone water-based fire extinguishing agent is arranged in a fire extinguishing agent container.
The utility model provides a lithium cell fire extinguishing agent economy injection method of preventing after-combustion extinguishing device, is applied to such as above-mentioned lithium cell fire extinguishing device that prevents after-combustion, and its implementation method is as follows:
the first step is as follows: initializing/resetting the audible and visual alarm and the alarm linkage host, and monitoring the temperature data of all infrared temperature monitoring modules;
the second step is that: judging whether the monitoring temperature of the infrared temperature monitoring module reaches an early warning condition, if not, returning to the first step, and if so, carrying out the next step:
the third step: the alarm linkage host sends out an alarm and continuously monitors the temperature data of each infrared temperature monitoring module;
the fourth step: judging whether the monitoring temperature of each infrared temperature monitoring module reaches a reset condition, if so, returning to the first step, and if not, performing the next step;
the fifth step: judging whether the monitoring temperature of the infrared temperature monitoring module reaches a first action condition, if not, returning to the third step, and if so, carrying out the next step;
and a sixth step: opening the electromagnetic valve, and spraying the fire extinguishing agent by the fire extinguishing agent nozzle to extinguish fire;
the seventh step: judging whether the monitoring temperature of all infrared temperature monitoring modules reaches the re-ignition prevention standby condition, if not, continuously spraying the fire extinguishing agent, and if so, carrying out the next step:
eighth step: closing the electromagnetic valve and continuously monitoring the temperature data of each infrared temperature monitoring module;
the ninth step: judging whether the monitoring temperature of the infrared temperature monitoring module reaches a reset condition, if so, returning to the first step, and if not, performing the next step;
the tenth step: and judging whether the monitoring temperature of the infrared temperature monitoring module reaches the re-ignition prevention action condition, if so, returning to the sixth step, and if not, returning to the eighth step.
The invention has the beneficial effects that: the array type infrared sensing module with low resolution is connected in series on an industrial bus for use, so that temperature early warning and fire collection of a single alarm host to a plurality of spaces or a plurality of monitoring angles of a single space are realized, and the array type infrared sensing module has the following advantages: (1) the temperature safety monitoring and covering of the object in the closed space are more comprehensive; especially for a closed space with small monitoring depth, the monitoring of multiple angles realizes the coverage superior to that of a common infrared thermal imager; (2) the simultaneous monitoring of a plurality of spaces and the accurate fire extinguishing of accident space only are realized; (3) the monitoring distance is short, the infrared temperature monitoring module can ensure the monitoring effect by using the planar array type low-resolution temperature measurement module, high-resolution infrared thermal imaging equipment is not needed, the effect is ensured, and meanwhile, the device cost, the system power consumption, the transmission line cost and the data background cost of infrared temperature measurement are greatly reduced, so that the system application has remarkable economic feasibility; (4) the small-volume infrared module connected in series with the bus performs power supply and communication through the industrial communication bus, the installation engineering is simple, the cable is simple, a network cable exchanger does not need to be arranged, and the infrared module is very suitable for old equipment modification and new equipment integration in dense small-space equipment;
because each temperature surface is required to be restored to normal temperature when the lithium battery fire is extinguished, and the reignition may start from any surface temperature rise, the multiple local surface monitoring methods can more accurately identify the real-time extinguishing effect of the lithium battery fire, ensure that no residual hidden danger occurs and improve the aftertreatment efficiency; meanwhile, the lithium battery afterburning phenomenon is discovered and early warned earlier, and secondary damage in accident rescue is prevented;
by applying the system, the fire extinguishing agent can be sprayed according to the requirements and sprayed for a plurality of times according to the fire extinguishing and cooling effects, so that the process that the fire is extinguished and not reburning is ensured to use the fire extinguishing agent with proper dosage, the expensive fire extinguishing consumables are saved, and the effect of unexpectedly improving the application economy is achieved for the fire extinguishing system of the expensive fire extinguishing agent;
because the application industry bus is connected with the infrared temperature monitoring module in series, the main equipment of the bus can control the audible and visual alarm and the wireless remote module, the Internet of things and cloud terminal of an event are realized, the related personnel can be conveniently and rapidly warned, and the fire extinguishing effect can be consulted in real time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts based on the drawings:
FIG. 1 is a schematic structural diagram of a lithium battery reignition-preventing and fire-extinguishing device according to a preferred embodiment of the invention;
FIG. 2 is a flow chart of the method for economically spraying the fire extinguishing agent of the lithium battery afterburning prevention fire extinguishing apparatus according to the preferred embodiment of the invention;
FIG. 3 is a logic diagram of the fire extinguishing agent economic spraying method of the lithium battery reignition prevention fire extinguishing device according to the preferred embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
The lithium battery afterburning prevention fire extinguishing device of the preferred embodiment of the invention, as shown in fig. 1, comprises one or more infrared temperature monitoring modules 1, a communication control power supply bus 2, an alarm linkage host 3, fire extinguishing agent nozzles 4 corresponding to the infrared temperature monitoring modules 1, electromagnetic valves 5 corresponding to the fire extinguishing agent nozzles 4 and fire extinguishing agent containers 6;
the infrared temperature monitoring module 1 and the electromagnetic valve 5 are electrically connected with and controlled by the alarm linkage host 3 through the communication control power supply bus 2;
a fire extinguishing agent pipeline 7 is connected and arranged on the fire extinguishing agent container 6, the fire extinguishing agent nozzles 4 are connected with the fire extinguishing agent pipeline 7, and the electromagnetic valves 5 are used for controlling the fire extinguishing agent nozzles 4 to be started and closed in a one-to-one correspondence manner;
the infrared temperature monitoring module 1 is used for performing surface coverage and real-time temperature detection on a target area from different angles, automatically searching a highest temperature value and a position coordinate by using a low-resolution array type infrared temperature measuring sensor and a microprocessor, and reporting monitoring temperature data to an alarm linkage host through a bus;
the alarm linkage host 3 is used for inquiring the monitoring temperature data of each infrared temperature monitoring module, alarming when the monitoring temperature data of the infrared temperature monitoring modules in the plurality of infrared temperature monitoring modules meet the set alarm condition, when the temperature data monitored by each infrared temperature monitoring module in the plurality of infrared temperature monitoring modules meets the set reset condition, the alarm is cancelled, when the temperature data monitored by the infrared temperature monitoring modules in the plurality of infrared temperature monitoring modules meet the set first action condition, the electromagnetic valve is opened to extinguish the fire, when the temperature data monitored by all the infrared temperature monitoring modules in the plurality of infrared temperature monitoring modules meet the set re-ignition prevention standby condition, closing the electromagnetic valve and entering a re-ignition prevention standby state, when the infrared temperature monitoring modules in the infrared temperature monitoring modules monitor that the temperature data meet the set re-ignition preventing action condition, the electromagnetic valve is opened to extinguish the fire;
the array type infrared sensing module with low resolution is connected in series on an industrial bus for use, so that temperature early warning and fire collection of a single alarm host to a plurality of spaces or a plurality of monitoring angles of a single space are realized, and the array type infrared sensing module has the following advantages: (1) the temperature safety monitoring and covering of the object in the closed space are more comprehensive; especially for a closed space with small monitoring depth, the monitoring of multiple angles realizes the coverage superior to that of a common infrared thermal imager; (2) the simultaneous monitoring of a plurality of spaces and the accurate fire extinguishing of only accident spaces are realized; (3) the monitoring distance is short, the monitoring effect can be ensured by using the planar array type low-resolution temperature measurement module, a high-resolution infrared thermal imaging system is not needed, the effect is ensured, and meanwhile, the device cost, the system power consumption, the transmission line cost and the data background cost of infrared temperature measurement are greatly reduced, so that the system application has remarkable economic feasibility; (4) the infrared equipment with small volume connected in series with the bus supplies power and communicates through the bus, has simple installation engineering, and is suitable for the modification of an old system and the integration of a new system;
because each temperature surface is required to be restored to normal temperature when the lithium battery fire is extinguished, and the reburning possibly starts from any surface temperature rise, the method of monitoring the multiple local surfaces can accurately identify the real-time extinguishing effect of the lithium battery fire, and meanwhile, early discovery and early warning are carried out on the reburning phenomenon of the lithium battery. The using effect of the fire extinguishing system is judged more timely and intuitively, and subsequent treatment after long-time waiting is not needed; in the space dense smoke caused by the out-of-control lithium ion battery, the infrared temperature monitoring technology has the unique smoke penetration temperature measurement capability, and can provide monitoring capability for the fire extinguishing effect and whether secondary reburning continues;
by applying the system, the fire extinguishing agent can be sprayed according to the requirements and sprayed for a plurality of times according to the fire extinguishing and cooling effects, so that the process that the fire is extinguished and not reburning is ensured to use the fire extinguishing agent with proper dosage, the expensive fire extinguishing consumables are saved, and the effect of unexpectedly improving the application economy is achieved for the fire extinguishing system of the expensive fire extinguishing agent;
because the industrial bus is used to be connected with the infrared temperature monitoring module in series, the main equipment of the bus can control the audible and visual alarm and the wireless remote module, thereby realizing the networking and cloud end of events, being convenient for quickly giving an alarm to related personnel and being capable of looking up the fire extinguishing effect in real time;
more specifically, one or more infrared array type temperature acquisition infrared temperature monitoring modules are connected to a communication control power supply bus in series, and the circuit of the infrared array type temperature acquisition infrared temperature monitoring modules comprises a bus interface, a controller, a bus power supply circuit, an infrared array temperature sensor, an embedded microprocessor and the like.
The communication control power supply bus is a physical bus for connecting a plurality of infrared temperature monitoring modules of the alarm linkage host, has the functions of data communication and power supply for the infrared temperature monitoring modules, adopts a two-wire system or four-wire system industrial bus, and is linked to extinguish the fire according to the number of spaces, and the bus comprises a plurality of control signal wires for controlling the electromagnetic valve corresponding to each space.
Furthermore, when the infrared temperature image is needed, a power supply +, a power supply-and RS485 communication bus with 4 lines can be adopted, and when the temperature image is not needed to be checked, the two-wire system bus of the powerbus technology can be adopted to realize power supply and data communication.
Preferably, the alarm linkage host 3 comprises an audible and visual alarm 30, a bus interface 31 and a control circuit board 32, and the control circuit board 32 is provided with a microprocessor 320, an audible and visual alarm control circuit 321 and a wireless communication module 322;
the microprocessor 320 is used for scheduling and managing a data bus of the infrared temperature monitoring module, judging alarm, triggering an acousto-optic alarm to alarm, controlling the wireless communication module to upload corresponding alarm data and controlling the relay to output linkage fire extinguishing logic;
a bus interface 31 for connecting to the control signal interfaces of the infrared temperature monitoring modules and the solenoid valves;
when N spaces needing linkage fire extinguishing exist, the output bus of the alarm linkage host consists of a power supply VCC, a power supply ground wire GND, solenoid valve control wires (1-N) and communication buses (485 + and 485-). And a microcontroller of the alarm linkage host controls the response type data transmission of each 485 slave device on the communication bus, so that the temperature acquisition of each infrared temperature monitoring module and the scheduling of image acquisition as required are realized.
Preferably, the array infrared sensor mounted on the infrared temperature monitoring module is an array infrared temperature sensor MLX90640 (infrared pixel 32 × 24) of Melexis corporation, belgium, or an HTPA32 × 32 sensor (infrared pixel 32 × 32) of Heimann corporation, germany, which has enough pixels required for a short distance and a wide detection angle (90 ° and 110 °), and can realize low-cost non-contact temperature collection for a small space.
Preferably, each fire extinguishing agent pipeline branch of the independent space needing to extinguish the fire is provided with a corresponding valve; preferably, a manual ball valve 40 and a normally closed electromagnetic valve 5 are provided to realize manual control and management of opening and closing and automatic control and management of opening and closing.
Preferably, the fire extinguishing agent container 6 is provided with a fire extinguishing agent pressure gauge 60 for detecting the internal pressure thereof; is used for indicating the shortage of the fire extinguishing agent.
Preferably, the fire extinguishing agent container 6 is internally provided with the perfluorohexanone water-based fire extinguishing agent, and as the perfluorohexanone is liquid at normal temperature and has a low boiling point temperature, the fire extinguishing agent is atomized into a space by using an atomizing nozzle, so that the fire extinguishing agent can rapidly reach a fire position; of course, other existing clean, insulating, and high-efficiency fire extinguishing agents are also possible.
The economic spraying method of the fire extinguishing agent of the lithium battery afterburning prevention fire extinguishing device is applied to the lithium battery afterburning prevention fire extinguishing device, as shown in figure 2, and simultaneously referring to figure 3, the implementation method comprises the following steps:
s01: initializing/resetting the audible and visual alarm and the alarm linkage host, and monitoring the temperature data of all the infrared temperature monitoring modules;
s02: judging whether the monitoring temperature of the infrared temperature monitoring module reaches an early warning condition, if not, returning to the first step, and if so, carrying out the next step:
s03: the alarm linkage host sends out an alarm and continuously monitors the temperature data of each infrared temperature monitoring module;
s04: judging whether the monitoring temperature of each infrared temperature monitoring module reaches a reset condition, if so, returning to the first step, and if not, performing the next step;
s05: judging whether the monitoring temperature of the infrared temperature monitoring module reaches a first action condition, if not, returning to the third step, and if so, performing the next step;
s06: opening the electromagnetic valve, and spraying the fire extinguishing agent by the fire extinguishing agent nozzle to extinguish fire;
s07: judging whether the monitoring temperature of all infrared temperature monitoring modules reaches the re-ignition prevention standby condition, if not, continuously spraying the fire extinguishing agent, and if so, carrying out the next step:
s08: closing the electromagnetic valve and continuously monitoring the temperature data of each infrared temperature monitoring module;
s09: judging whether the monitoring temperature of the infrared temperature monitoring module reaches a reset condition, if so, returning to the first step, and if not, performing the next step;
s10: judging whether the monitoring temperature of the infrared temperature monitoring module reaches the re-ignition preventing action condition or not, if so, returning to the sixth step, and if not, returning to the eighth step;
the invention relates to an economic fire extinguishing agent spraying method, in particular to a business process of a re-combustion preventing fire extinguishing agent spraying method, which is described as follows:
after the system is electrified and initialized or reset after the last fire extinguishing linkage treatment is finished, the bus equipment monitors the temperature data of all the infrared temperature monitoring modules periodically and compares the temperature data with the set temperature alarm value of each infrared temperature monitoring module, and when the fact that any infrared temperature monitoring module exceeds the early warning temperature is not found, the monitoring is continued.
When the temperature of 1 or more infrared temperature monitoring modules exceeds the early warning condition, starting the acousto-optic and remote alarm of the early warning, entering the early warning state and continuously monitoring the temperature of the infrared temperature monitoring modules.
And in the early warning state, when the detection temperature of all the infrared temperature monitoring modules reaches the reset condition, the system recovers the reset state and continues monitoring. The process proves that the high-temperature behavior is automatically reduced without causing fire, and the possible reason is that the conditions generated by high temperature are artificially cut off after early warning, such as the overcharge power supply of the battery is cut off; or the battery capacity of the out-of-control battery is low, and the out-of-control process is not enough to cause further safety accidents, so that the process is ended.
If the system monitors that the temperature of any infrared temperature monitoring module is not reset and is still continuously raised in the early warning state, the first fire extinguishing action condition is finally achieved, and the linked cooling/fire extinguishing action is started. The control host computer controls the electromagnetic valve of the corresponding space to open and spray the fire extinguishing agent.
The key of the battery fire extinguishing and temperature reducing process is that after all monitored battery surface temperatures reach the re-ignition preventing standby condition (the surface temperatures are reduced to normal temperature and continuously reach the set time t 1), the electromagnetic valve can be closed, the fire extinguishing agent is stopped being sprayed, the re-ignition preventing standby state is entered, in the state, the fire extinguishing agent is not sprayed when the electromagnetic valve is closed, the acousto-optic remote alarm is not reset, and the system continues to monitor the temperature of the infrared temperature monitoring module. In this state, it is confirmed that all the monitored surface temperatures of the batteries are restored to the reset condition (the surface temperature is reduced to normal temperature and continuously reaches the set long time), and the system is turned into the reset state consistent with the initialization.
After the battery is put out a fire, the process of surface temperature rising can be repeated before the battery is reignited, and at the moment, the key of preventing the battery from reigniting is that the early warning process is not repeated in the reignition prevention standby state, the fire extinguishing agent is directly started to spray as long as the temperature of the space infrared temperature monitoring module is detected to exceed the early warning temperature, so that the temperature control before secondary ignition is realized, and the fire extinguishing agent is stopped from spraying to enter the reignition prevention standby state again when the temperature reaches the standby state.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A lithium battery afterburning prevention fire extinguishing device is characterized by comprising one or more infrared temperature monitoring modules, a communication control power supply bus, an alarm linkage host, a fire extinguishing agent spray head corresponding to the infrared temperature monitoring modules, an electromagnetic valve corresponding to the fire extinguishing agent spray head and a fire extinguishing agent container;
the infrared temperature monitoring module and the electromagnetic valve are electrically connected with and controlled by the alarm linkage host through a communication control power supply bus;
the fire extinguishing agent container is connected with a fire extinguishing agent pipeline, the fire extinguishing agent nozzles are connected with the fire extinguishing agent pipeline, and the electromagnetic valves are used for controlling the fire extinguishing agent nozzles to be started and closed in a one-to-one correspondence manner;
the infrared temperature monitoring module performs surface coverage and real-time temperature detection on a target area from different angles, automatically searches a maximum temperature value and a position coordinate by using a low-resolution array type infrared temperature measuring sensor and a microprocessor, and reports monitored temperature data to the alarm linkage host through a bus;
the alarm linkage host is used for rapidly inquiring on a communication control bus to obtain the monitoring temperature data of each infrared temperature monitoring module, alarming when the monitoring temperature data of one of the infrared temperature monitoring modules meets the set alarming condition, when the temperature data monitored by each infrared temperature monitoring module meets the set reset condition, the alarm is cancelled, when the temperature data monitored by one of the infrared temperature monitoring modules meets the set first action condition, the electromagnetic valve is opened to extinguish the fire, when the temperature data monitored by all the infrared temperature monitoring modules meet the set re-ignition prevention standby condition, the electromagnetic valves are closed and the infrared temperature monitoring modules enter a re-ignition prevention standby state, and when the module monitoring temperature data in the infrared temperature monitoring modules meet the set re-combustion preventing action condition, the electromagnetic valve is opened to extinguish the fire.
2. The lithium battery afterburning prevention fire extinguishing device as claimed in claim 1, wherein the alarm linkage host comprises an audible and visual alarm, a bus interface and a control circuit board, and a microprocessor, an audible and visual alarm control circuit and a wireless communication module are arranged on the control circuit board;
the microprocessor is used for scheduling a data bus of the management and infrared temperature monitoring module, judging alarm, triggering an acousto-optic alarm to alarm, controlling the wireless communication module to upload corresponding alarm data and controlling the relay to output linkage fire extinguishing logic;
and the bus interface is used for being connected to the infrared temperature monitoring modules and the control signal interface of the electromagnetic valve.
3. The lithium battery afterburning prevention and fire extinguishing device as claimed in claim 1, wherein a manual ball valve is arranged on the fire extinguishing agent nozzle.
4. The lithium battery afterburning prevention and fire extinguishing device as claimed in claim 1, wherein a fire extinguishing agent pressure gauge for detecting the internal pressure of the fire extinguishing agent container is provided.
5. The lithium battery afterburning prevention and fire extinguishing device as claimed in claim 1, wherein a perfluorohexanone-based water-based fire extinguishing agent is disposed in the fire extinguishing agent container.
6. An economic spraying method of a fire extinguishing agent of a lithium battery afterburning prevention fire extinguishing device is applied to the lithium battery afterburning prevention fire extinguishing device as claimed in any one of claims 1 to 5, and is characterized in that the implementation method comprises the following steps:
the first step is as follows: initializing/resetting the audible and visual alarm and the alarm linkage host, and monitoring the temperature data of all infrared temperature monitoring modules;
the second step is that: judging whether the monitoring temperature of the infrared temperature monitoring module reaches an early warning condition, if not, returning to the first step, and if so, carrying out the next step:
the third step: the alarm linkage host sends out an alarm and continuously monitors the temperature data of each infrared temperature monitoring module;
the fourth step: judging whether the monitoring temperature of each infrared temperature monitoring module reaches a reset condition, if so, returning to the first step, and if not, performing the next step;
the fifth step: judging whether the monitoring temperature of the infrared temperature monitoring module reaches a first action condition, if not, returning to the third step, and if so, performing the next step;
and a sixth step: opening the electromagnetic valve, and spraying the fire extinguishing agent by the fire extinguishing agent nozzle to extinguish fire;
the seventh step: judging whether the monitoring temperature of all infrared temperature monitoring modules reaches the re-ignition prevention standby condition, if not, continuously spraying the fire extinguishing agent, and if so, carrying out the next step:
eighth step: closing the electromagnetic valve and continuously monitoring the temperature data of each infrared temperature monitoring module;
the ninth step: judging whether the monitoring temperature of the infrared temperature monitoring module reaches a reset condition, if so, returning to the first step, and if not, performing the next step;
the tenth step: and judging whether the monitoring temperature of the infrared temperature monitoring module reaches the re-ignition prevention action condition, if so, returning to the sixth step, and if not, returning to the eighth step.
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