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CN-122006198-A - Aerogel fire extinguishing agent for lithium battery

CN122006198ACN 122006198 ACN122006198 ACN 122006198ACN-122006198-A

Abstract

The application belongs to the technical field of fire extinguishing agents, and particularly relates to a fire extinguishing agent for lithium battery aerogel, which comprises the following preparation components: inorganic aerogel powder 2 parts 10, fluorocarbon surfactant 3 parts, hydrocarbon surfactant 4 parts 6, foaming agent 6 parts 8 parts, lithium ion battery fire retardant 4 parts 10 parts, organic solvent 8 parts 13, antifreeze 1 parts, foam stabilizer 0.05 1 parts and water have been added to this application in the fire extinguishing agent inorganic aerogel powder, can put out the fire in the fire extinguishing agent 3 in 6 seconds, improve fire extinguishing efficiency greatly, and no dust remains, avoid causing secondary damage to equipment, restrain the heat and toxic gas are constantly released to the fire source, can form the insulating layer after the aerogel contacts the heat source, block the inside chemical reaction chain of electric core, reduce its temperature fast.

Inventors

  • LIN ZHI
  • ZHANG XIAOHUA

Assignees

  • 中皓时代科技(福建)有限公司

Dates

Publication Date
20260512
Application Date
20251208

Claims (7)

  1. 1. The fire extinguishing agent for the lithium battery aerogel is characterized by comprising 2-10 parts of inorganic aerogel powder, 3-5 parts of fluorocarbon surfactant, 4-6 parts of hydrocarbon surfactant, 6-8 parts of foaming agent, 4-10 parts of lithium ion battery flame retardant, 8-13 parts of organic solvent, 1-10 parts of antifreeze agent, 0.05-1 part of foam stabilizer and water; the specific preparation method for the lithium battery aerogel fire extinguishing agent comprises the following steps: Step one, raw material pretreatment, namely taking 2-10 parts of inorganic aerogel powder, putting the powder into a vacuum drying oven, drying the powder for 2-3 hours at 60-80 ℃, removing moisture and impurities adsorbed by the powder, cooling the powder to room temperature for standby after drying, pouring 8-13 parts of organic solvent and 1-10 parts of antifreeze agent into a beaker, stirring the mixture for 5-10 minutes at the rotating speed of 300-500r/min by using a magnetic stirrer, and fully mixing the mixture to form a uniform solvent system for standby; Dissolving the surfactant and the foaming agent, namely slowly adding 4-6 parts of hydrocarbon surfactant into the pre-mixed solvent system in the step one, keeping stirring at the speed of 300-500r/min, stirring for 15-20 minutes until the surfactant is completely dissolved, suspending stirring until the solution has no obvious particles, adding 3-5 parts of fluorocarbon surfactant and 6-8 parts of foaming agent, restarting a stirrer, and increasing the rotating speed to 500-800r/min, and stirring for 20-30 minutes; Adding the flame retardant and the foam stabilizer, namely slowly adding 4-10 parts of the lithium ion battery flame retardant under stirring, stirring while adding, continuing stirring for 25-35 minutes until the flame retardant is completely dissolved and the solution is in a uniform transparent or semitransparent state, reducing the stirring speed to 300-400r/min, taking 0.05-1 part of the foam stabilizer, diluting with a small amount of deionized water to obtain a 5-10% dilute solution, slowly dripping into the mixed solution, and continuing stirring for 15-20 minutes after dripping is completed; Step four, inorganic aerogel powder is dispersed, namely, the stirring rotation speed is kept at 300-400r/min, 2-10 parts of pretreated inorganic aerogel powder is added into the mixed solution for 3-5 times, stirring is carried out for 5-8 minutes after each addition, the next batch is added after the powder is primarily dispersed, the stirring rotation speed is raised to 800-1200r/min after all the powder is added, an ultrasonic dispersing instrument is started, the stirring and dispersing are carried out cooperatively for 30-45 minutes, and micro aggregates of the aerogel powder are broken through the combination of high-speed stirring and ultrasonic waves, so that the micro aggregates are uniformly dispersed in the solution, and a stable aerogel suspension system is formed; Turning off an ultrasonic dispersing instrument, reducing the stirring rotating speed to 200-300r/min, slowly adding deionized water, stirring while adding water, continuing stirring for 10-15 minutes after adding water, ensuring that the whole system is uniform, detecting the pH value of the solution by using pH test paper, if the pH value is required to be regulated, dropwise adding a small amount of dilute hydrochloric acid or sodium hydroxide solution, stirring for 5 minutes after each dropwise adding until the pH value reaches the standard, if the viscosity is too high, properly adding a small amount of deionized water, if the viscosity is too low, standing for a period of time, observing whether the mixture is naturally thickened, ensuring that the final extinguishing agent is in a flowing state, and facilitating the spraying; And step six, standing and curing, namely transferring the prepared fire extinguishing agent into a sealed container, standing for 24-48 hours at room temperature of 20-25 ℃ under the dark condition, enabling each component to fully act, further stabilizing the dispersion state of the foam system and the aerogel, detecting the dispersibility, foamability and stability of the foam system, and sealing and storing the foam system and the aerogel after meeting the requirements.
  2. 2. The fire extinguishing agent for the lithium battery aerogel according to claim 1, wherein the fire extinguishing agent for the lithium battery aerogel is prepared from 2 parts of inorganic aerogel powder, 3 parts of fluorocarbon surfactant, 4 parts of hydrocarbon surfactant, 6 parts of foaming agent, 4 parts of lithium ion battery flame retardant, 8 parts of organic solvent, 1 part of antifreeze agent, 0.05 part of foam stabilizer and water.
  3. 3. The fire extinguishing agent for the lithium battery aerogel according to claim 1, wherein the fire extinguishing agent for the lithium battery aerogel is prepared from 6 parts of inorganic aerogel powder, 4 parts of fluorocarbon surfactant, 5 parts of hydrocarbon surfactant, 7 parts of foaming agent, 7 parts of lithium ion battery flame retardant, 10.5 parts of organic solvent, 5.5 parts of antifreeze agent, 0.55 part of foam stabilizer and water.
  4. 4. The fire extinguishing agent for the lithium battery aerogel according to claim 1, wherein the fire extinguishing agent for the lithium battery aerogel is prepared from 10 parts of inorganic aerogel powder, 5 parts of fluorocarbon surfactant, 6 parts of hydrocarbon surfactant, 8 parts of foaming agent, 10 parts of lithium ion battery flame retardant, 13 parts of organic solvent, 10 parts of antifreeze agent, 1 part of foam stabilizer and water.
  5. 5. The aerogel fire extinguishing agent for a lithium battery according to claim 1, wherein the inorganic aerogel powder is silica aerogel, the fluorocarbon surfactant is fs-50, the hydrocarbon surfactant is lauryl sulfonated succinic monoester disodium or fatty alcohol polyoxyethylene ether ammonium sulfate, the foaming agent is sodium dodecyl sulfate, the lithium ion battery flame retardant is azo diiso Ding Mi-line hydrochloride, the organic solvent is ethanol, the antifreeze agent is sodium chloride, and the foam stabilizer is alginate.
  6. 6. The aerogel fire extinguishing agent for a lithium battery according to claim 1, wherein in the third step, when the fire retardant for the lithium ion battery is added in a stirring state, the rotating speed is controlled to be 500-800r/min.
  7. 7. The aerogel fire extinguishing agent for a lithium battery according to claim 1, wherein in the fifth step, after adding a small amount of deionized water, if the viscosity is too low, the fire extinguishing agent needs to be kept stand for 10-15 minutes.

Description

Aerogel fire extinguishing agent for lithium battery Technical Field The invention relates to the technical field of fire extinguishing agents, in particular to an aerogel fire extinguishing agent for a lithium battery. Background At present, the lithium battery is widely applied to the fields of electric automobiles, energy storage power stations and the like due to the advantages of high energy density, long life cycle, low self-discharge rate, no memory and the like, but the lithium battery is a combustible material and a igniting source, and is easy to cause safety accidents such as fire and explosion and the like once collision, extrusion, overcharge, short circuit and the like occur, so that casualties are caused; however, the existing lithium battery fire extinguishing agent still has the following technical problems when in use: When the lithium battery is on fire, the internal thermal runaway reaction can continuously release heat and toxic gas, the conventional fire extinguishing agent (such as dry powder and carbon dioxide) can only extinguish surface flame and can not block chain reaction in the battery, and the water-based fire extinguisher can cool down, but has insufficient cooling efficiency to inhibit internal chemical reaction when facing to the high-temperature lithium battery (ignition point 500-800 ℃). For this reason, a fire extinguishing agent for lithium battery aerogel has been proposed to solve the above-mentioned problems. Disclosure of Invention The invention aims to provide an aerogel fire extinguishing agent for a lithium battery, which aims to solve the problems in the background technology. The preparation components of the fire extinguishing agent for the lithium battery aerogel comprise 2-10 parts of inorganic aerogel powder, 3-5 parts of fluorocarbon surfactant, 4-6 parts of hydrocarbon surfactant, 6-8 parts of foaming agent, 4-10 parts of lithium ion battery flame retardant, 8-13 parts of organic solvent, 1-10 parts of antifreeze agent, 0.05-1 part of foam stabilizer and water; the specific preparation method for the lithium battery aerogel fire extinguishing agent comprises the following steps: Step one, raw material pretreatment, namely taking 2-10 parts of inorganic aerogel powder, putting the powder into a vacuum drying oven, drying the powder for 2-3 hours at 60-80 ℃, removing water and impurities adsorbed by the powder, cooling the powder to room temperature for standby, taking 8-13 parts of organic solvent and 1-10 parts of antifreeze agent, pouring the organic solvent and the antifreeze agent into a beaker, stirring the organic solvent and the antifreeze agent for 5-10 minutes at the rotating speed of 300-500r/min by using a magnetic stirrer, and fully mixing the organic solvent and the antifreeze agent to form a uniform solvent system for standby; Dissolving the surfactant and the foaming agent, namely slowly adding 4-6 parts of hydrocarbon surfactant into the pre-mixed solvent system in the step one, keeping stirring at the speed of 300-500r/min, stirring for 15-20 minutes until the surfactant is completely dissolved, suspending stirring until the solution has no obvious particles, adding 3-5 parts of fluorocarbon surfactant and 6-8 parts of foaming agent, restarting a stirrer, and increasing the rotating speed to 500-800r/min, and stirring for 20-30 minutes; Adding the flame retardant and the foam stabilizer, namely slowly adding 4-10 parts of the lithium ion battery flame retardant under stirring, stirring while adding, continuing stirring for 25-35 minutes until the flame retardant is completely dissolved and the solution is in a uniform transparent or semitransparent state, reducing the stirring speed to 300-400r/min, taking 0.05-1 part of the foam stabilizer, diluting with a small amount of deionized water to obtain a 5-10% dilute solution, slowly dripping into the mixed solution, and continuing stirring for 15-20 minutes after dripping is completed; Step four, inorganic aerogel powder is dispersed, namely, the stirring rotation speed is kept at 300-400r/min, 2-10 parts of pretreated inorganic aerogel powder is added into the mixed solution for 3-5 times, stirring is carried out for 5-8 minutes after each addition, the next batch is added after the powder is primarily dispersed, the stirring rotation speed is raised to 800-1200r/min after all the powder is added, an ultrasonic dispersing instrument is started, the stirring and dispersing are carried out cooperatively for 30-45 minutes, and micro aggregates of the aerogel powder are broken through the combination of high-speed stirring and ultrasonic waves, so that the micro aggregates are uniformly dispersed in the solution, and a stable aerogel suspension system is formed; Turning off an ultrasonic dispersing instrument, reducing the stirring rotating speed to 200-300r/min, slowly adding deionized water, stirring while adding water, continuing stirring for 10-15 minutes after adding water, ensuring that th