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A kind of organic/inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium ion battery fire and preparation method thereof

A lithium-ion battery, core-shell structure technology, applied in the direction of fire prevention equipment, etc., can solve the problems of high water flow, lithium-ion battery external short circuit, etc., to achieve good anti-caking performance, good space dispersion and cooling, easy to cleaning effect

Active Publication Date: 2022-03-01
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fire extinguishing method unanimously recognized by scholars at home and abroad is that continuous large-scale water spraying can effectively extinguish the fire of lithium-ion batteries, but due to the high fluidity of water, it is difficult to stay on the surface of lithium-ion batteries, and the actual cooling effect of water is less than 20%. Water containing impurities is conductive and can easily cause an external short circuit of the lithium-ion battery. In addition, the water will react with the electrolyte components of the lithium-ion battery to produce a large amount of toxic gases CO and HF

Method used

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  • A kind of organic/inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium ion battery fire and preparation method thereof
  • A kind of organic/inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium ion battery fire and preparation method thereof
  • A kind of organic/inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium ion battery fire and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] An organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium-ion battery fires, wherein the raw material components are calculated in parts by weight: 500 parts of hydrophobic silicon dioxide, 20 parts of acrylic acid, 10 parts of sodium bicarbonate, and 20 parts of acrylamide 5 parts, 5 parts of methyl methacrylate, 5 parts of ethyl methacrylate, 5 parts of butyl methacrylate, 5 parts of ethyl acrylate, 60 parts of N-isopropylacrylamide, N-(2-hydroxyethyl ) 20 parts of acrylamide, 1 part of N,N'-methylenebisacrylamide, 1 part of potassium persulfate and 4348 parts of deionized water, with a total weight of 5000 parts.

[0054] A kind of organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for putting out lithium-ion battery fire, its preparation method comprises the steps:

[0055] (1) Weigh acrylic acid and dissolve it in water, add sodium bicarbonate in three times, stir at room temperature fo...

Embodiment 2

[0062] An organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium-ion battery fires, wherein the raw material components are calculated in parts by weight: 400 parts of hydrophobic silicon dioxide, 25 parts of acrylic acid, 20 parts of sodium bicarbonate, and 10 parts of acrylamide Parts, 3 parts of methyl methacrylate, 2 parts of ethyl methacrylate, 5 parts of butyl methacrylate, 5 parts of ethyl acrylate, 20 parts of N-isopropylacrylamide, 20 parts of hydroxyethyl methacrylate , 1 part of N,N'-methylenebisacrylamide, 1 part of potassium persulfate and 4488 parts of deionized water, with a total weight of 5000 parts.

[0063] A kind of organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for putting out lithium-ion battery fire, its preparation method comprises the steps:

[0064] (1) Weigh acrylic acid and dissolve it in water, add sodium bicarbonate in three times, stir at room temperature for 20mi...

Embodiment 3

[0071] An organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium-ion battery fires, wherein the raw material components are calculated in parts by weight: 700 parts of hydrophobic silicon dioxide, 50 parts of acrylic acid, 35 parts of sodium bicarbonate, and 80 parts of acrylamide Parts, 3 parts of methyl methacrylate, 2 parts of ethyl methacrylate, 2 parts of butyl methacrylate, 3 parts of ethyl acrylate, 20 parts of N-isopropylacrylamide, N-(2-hydroxyethyl ) 30 parts of acrylamide, 1 part of N,N'-methylenebisacrylamide, 1 part of potassium persulfate and 4073 parts of deionized water, with a total weight of 5000 parts.

[0072] A kind of organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for putting out lithium-ion battery fire, its preparation method comprises the steps:

[0073] (1) Weigh acrylic acid and dissolve it in water, add sodium bicarbonate in three times, stir at room temperature for 20...

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Abstract

The invention provides an organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium-ion battery fires and a preparation method thereof. The preparation method includes the synthesis of organic hydrogel and the organic / inorganic hybrid core-shell structure fire extinguishing agent preparation. The present invention utilizes free radical polymerization to prepare organic hydrogel, and disperses organic hydrogel and hydrophobic fumed silica under high-speed stirring, so that fumed silica is wrapped in hydrogel particles to form a core-shell structure. Extinguishing agent. The fire extinguishing material provided by the invention has simple preparation process and convenient operation, and is suitable for mass production and popularization.

Description

technical field [0001] The invention belongs to the technical field of fire materials, and in particular relates to a preparation method of an organic / inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium-ion battery fires. Background technique [0002] In recent years, lithium-ion batteries have been widely used in portable electronic devices, new energy vehicles, electrochemical energy storage power stations, and aviation aircraft due to their advantages such as high energy density, small size, long life, and good cycle performance. Lithium-ion batteries can undergo thermal runaway (self-heating exothermic reaction) under conditions such as thermal abuse, electrical abuse, or mechanical abuse, and thermal runaway can easily cause fire or explosion. Lithium-ion battery fire accidents occur frequently, causing huge losses to people's lives and property. Therefore, research on lithium-ion battery fire extinguishing technology is of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D1/00A62D1/06
CPCA62D1/0064A62D1/06
Inventor 张和平付阳阳张忠心赵军超薛峰闫明远
Owner UNIV OF SCI & TECH OF CHINA
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