Lithium battery fire extinguishing agent, preparation method thereof and fire extinguisher

Abstract

The invention discloses a lithium battery fire extinguishing agent and a preparation method thereof.The agent contains various flame-retardant active agents, flame spreading can be effectively inhibited, combustion intensity can be rapidly reduced, lithium battery fire disasters can be rapidly controlled and extinguished, and by adding a stabilizer, the lithium battery fire extinguishing agent can be used as a fire extinguishing agent for lithium battery fire extinguishing. Stable physicochemical properties of the medicament in storage and use processes are ensured, decomposition or failure is not easy to occur, effectiveness and reliability of the medicament are ensured, and addition of a small amount of graphene not only enhances the overall performance of the medicament, but also possibly provides an additional heat conduction or shielding function to help to quickly dissipate heat or isolate a heat source, so that the service life of the medicament is prolonged. The fire extinguishing efficiency is further improved, sterile ionized water serves as a mixing agent, the agent is environmentally friendly, secondary pollution cannot be caused while the fire is extinguished, and the agent is relatively safe to the human body.

Description

Technical Field

[0001] The invention relates to the field of fire fighting and fire extinguishing, and in particular to a lithium battery fire extinguishing agent and a preparation method thereof. Background Art

[0002] Fire extinguishing agent refers to a substance that can effectively destroy combustion conditions and terminate combustion; the main fire extinguishing mechanisms are: cooling, suffocation, isolation and chemical inhibition. According to its state characteristics, it can be divided into three categories: liquid fire extinguishing agent, solid fire extinguishing agent and gas fire extinguishing agent.

[0003] With the development of the country, new energy vehicles have now become widely popular. However, when the lithium battery of new energy catches fire, the internal pressure of the battery increases sharply, causing the battery to rupture or explode, releasing a large amount of heat. Due to the high energy density of lithium batteries, the flame is more intense and difficult to extinguish. During the combustion process, lithium batteries will release a variety of harmful gases, such as carbon monoxide (CO), hydrogen fluoride (HF), etc., which pose a threat to health and the environment. The interior of the lithium battery may still be in a high temperature state, and there is a risk of re-ignition.

[0004] In summary, a lithium battery fire extinguishing agent and a preparation method thereof, and a fire extinguisher are needed to solve the deficiencies in the prior art. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a lithium battery fire extinguishing agent and a preparation method thereof, aiming to solve the above problems.

[0006] To achieve the above object, the present invention provides the following technical solution: a lithium battery fire extinguishing agent, comprising a flame retardant active agent, a thickener and a stabilizer, and a mixture, wherein the flame retardant active agent comprises hybrid fluorocarbon betaine, alkyl sulfonyl betaine, lauryl imidazoline betaine and cocamidopropyl betaine, It is composed of the following components in mass fractions: 2-10 parts of hybrid fluorocarbon betaine; 2-8 parts of alkyl sulfobetaine; 5-15 parts of lauryl imidazoline betaine; 5-10 parts of cocamidopropyl betaine; Graphene 0.1-0.6 parts; Stabilizer 5-25 parts; Thickener 0.3-1.5 parts; The balance is a mixture, which is sterile ionized water.

[0007] Optionally, the thickener is guar gum or sodium carboxymethyl cellulose. When choosing guar gum, it is 0.3-1.2 parts, Select 0.4-1.5 parts of sodium carboxymethyl cellulose.

[0008] Optionally, the stabilizer is polyvinyl alcohol or sodium polyacrylate. When polyvinyl alcohol is selected, 5-20 parts; When sodium polyacrylate is selected, it is 8-25 parts.

[0009] A method for preparing a lithium battery fire extinguishing agent, using the lithium battery fire extinguishing agent, comprising the following steps: Step S1: Raw material preparation: Calculate the required amount of each component according to the total amount required and the distribution ratio of each group of fire extinguishing agent; Step S2: dissolving the raw materials: introducing the calculated amount of the mixture into a dissolving container, and sequentially adding the flame retardant active agent, thickener, stabilizer and graphene; Step S3: Mixing and stirring: using a high-speed shear mixer to perform high-speed shear stirring on the mixed liquid until the mixed liquid is uniform and has no obvious particles; Step S4: Detection and adjustment: Detect the uniformity and stability of the mixed solution, and stir and adjust again. Step S5: preparing the solution: according to the percentage of the aqueous solution to be prepared, the mass of the fire extinguishing agent required is calculated, and the fire extinguishing agent is added into the sterile ionized water and stirred until it is completely dissolved to obtain the lithium battery fire extinguishing agent.

[0010] Optionally, in step S3, the speed of the high-speed shear mixer is controlled at 10,000-15,000 r / min, and the speed is increased in a step-by-step manner. The initial speed is controlled at 20% for five minutes, and then the speed is increased to 50%. The particle dispersion of the mixed liquid is observed. If there is obvious particle agglomeration, the speed is gradually increased to 15,000 r / min. Otherwise, if there is no obvious particle agglomeration, the speed is gradually increased to 10,000 r / min.

[0011] Optionally, in step S4, when particles are detected in the stirred mixed solution, the stirring time is extended by 20-25% until no particles are detected.

[0012] Optionally, in step S2, ultrasound is used for pulse-assisted dispersion when graphene is added, and the pulse-assisted dispersion is set so that the ultrasound runs back and forth between start and pause, and each start time is controlled within 3-5 seconds and the pause time is controlled within 7-10 seconds.

[0013] A lithium battery fire extinguisher uses a lithium battery fire extinguishing agent, including a tank body and a nozzle, wherein the nozzle is fixedly connected to the tank body, a spray switch is arranged on the nozzle, and the spray switch is fixedly connected to the nozzle, and the lithium battery fire extinguishing agent is loaded into the tank body through a high-pressure tank.

[0014] Beneficial effects of the present invention: 1. In the present invention, the agent contains a variety of flame retardant active agents, which can effectively inhibit the spread of flames and quickly reduce the intensity of combustion, which is helpful to quickly control and extinguish lithium battery fires. By adding stabilizers, the physical and chemical properties of the agent are ensured to be stable during storage and use, and it is not easy to decompose or fail, thereby ensuring the effectiveness and reliability of the agent; 2. In the present invention, the application of thickener increases the viscosity of the agent, so that it can form a protective film at the fire scene, more effectively cover the surface of the burning object, prevent oxygen from contacting, and thus achieve a better fire extinguishing effect; 3. In the present invention, the addition of a small amount of graphene not only enhances the overall performance of the agent, but also may provide additional heat conduction or shielding functions, help to dissipate heat or isolate heat sources faster, and further improve the fire extinguishing efficiency. Using sterile ionized water as a mixing agent effectively solves the problem of solubility resistance, and there will be no problems of deterioration and odor. In addition, the agent has high stability and will not have the problem of agent sedimentation. The agent is environmentally friendly, will not cause secondary pollution while extinguishing a fire, and is relatively safe for the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a related detection diagram of the present invention.

[0016] Figure 2 This is a diagram of a lithium battery after combustion according to the present invention.

[0017] Figure 3 This is a precipitation diagram of a traditional medicine.

[0018] Figure 4 This is a diagram showing the dissolution resistance of a drug according to the present invention. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] A lithium battery fire extinguishing agent comprises a flame retardant active agent, a thickener and a stabilizer, and a mixture, wherein the flame retardant active agent comprises hybrid fluorocarbon betaine, alkyl sulfonyl betaine, lauryl imidazoline betaine and cocamidopropyl betaine, and is composed of the following components in mass fractions: 2-10 parts of hybrid fluorocarbon betaine; 2-8 parts of alkyl sulfobetaine; 5-15 parts of lauryl imidazoline betaine; 5-10 parts of cocamidopropyl betaine; Graphene 0.1-0.6 parts; Stabilizer 5-25 parts; Thickener 0.3-1.5 parts; The balance is a mixture, which is sterile ionized water.

[0021] Optionally, the thickener is guar gum or sodium carboxymethyl cellulose. When choosing guar gum, it is 0.3-1.2 parts, Select 0.4-1.5 parts of sodium carboxymethyl cellulose.

[0022] Optionally, the stabilizer is polyvinyl alcohol or sodium polyacrylate. When polyvinyl alcohol is selected, 5-20 parts; When sodium polyacrylate is selected, it is 8-25 parts.

[0023] A method for preparing a lithium battery fire extinguishing agent, using the lithium battery fire extinguishing agent, comprising the following steps: Step S1: Raw material preparation: Calculate the required amount of each component according to the total amount required and the distribution ratio of each group of fire extinguishing agent; Step S2: Dissolving the raw materials: introducing the calculated amount of the mixture into a dissolving container, selecting a container suitable for the chemical reaction, preferably a material that is resistant to chemical corrosion and can withstand the required temperature changes, and sequentially adding the flame retardant active agent, thickener, stabilizer and graphene; First, slowly add the flame retardant active agent into the dissolution container. After the flame retardant active agent is basically evenly distributed, gradually add the thickener. After the thickener is completely dissolved or hydrated, add the stabilizer. The stabilizer helps to maintain the long-term stability of the mixture. Finally, add graphene. Since graphene has a large surface area and is easy to aggregate, it is necessary to be particularly careful when adding it. Usually, efficient dispersion technology is required to avoid agglomeration. Here, ultrasonic pulse-assisted dispersion is selected. The pulse-assisted dispersion is set to reciprocate between start and pause of the ultrasonic wave. The start time of each time is controlled at 3-5 seconds, and the pause time is controlled at 7-10 seconds.

[0024] Step S3: Mixing and stirring: using a high-speed shear mixer to perform high-speed shear stirring on the mixed liquid until the mixed liquid is uniform and has no obvious particles; When starting the high-speed shear mixer, start from a lower speed and gradually increase to a predetermined high speed. The speed is increased in a step-by-step manner, and the maximum speed is controlled at 10,000-15,000 r / min. First, the initial speed is controlled at 20% for five minutes, and then the speed is increased to 50%. Observe the particle dispersion of the mixed liquid. If there is obvious particle agglomeration, gradually increase the speed to 15,000 r / min. Otherwise, if there is no obvious particle agglomeration, gradually increase the speed to 10,000 r / min. Step S4: Detection and adjustment: Detect the uniformity and stability of the mixed solution by direct observation: directly observe the mixed solution through a transparent container under good lighting conditions to see if there are obvious particles or uneven colors; or microscopic examination: use an optical microscope or an electron microscope to observe a small amount of sample in more detail to determine whether there are undispersed particles or agglomerates; When particles are detected in the stirred mixed solution, the stirring time is extended by 20-25% until no particles are detected; Step S5: preparing the solution: calculating the mass of the fire extinguishing agent required according to the percentage of the aqueous solution required to be prepared, adding the fire extinguishing agent into the water, stirring until it is completely dissolved, and obtaining the lithium battery fire extinguishing agent; Step S6: Load the lithium battery fire extinguishing agent into the water-based fire extinguisher.

[0025] like Figure 1 and 2 As shown, Example 1: 5 parts of hybrid fluorocarbon betaine; 3 parts of alkyl sulfonyl betaine; 8 parts of lauryl imidazoline betaine; 7 parts of cocamidopropyl betaine; 0.5 parts of graphene; 12 parts of polyvinyl alcohol; 1 part of guar gum are dissolved in 72 parts of water, and a fire extinguishing agent is obtained by high-speed shear stirring. After testing, the fire was controlled within 6 seconds, the flame was very small within 8 seconds, and it was completely extinguished within 14 seconds.

[0026] Example 2: 5 parts of hybrid fluorocarbon betaine; 3 parts of alkyl sulfonyl betaine; 6 parts of lauryl imidazoline betaine; 7 parts of cocamidopropyl betaine; 0.5 parts of graphene; 12 parts of polyvinyl alcohol; 1 part of guar gum were dissolved in 72 parts of water and stirred by high-speed shear to obtain a fire extinguishing agent. After testing, the fire was controlled within 7 seconds, the flame was very small within 9 seconds, and it was completely extinguished within 16 seconds.

[0027] Example 3: 5 parts of hybrid fluorocarbon betaine; 3 parts of alkyl sulfonyl betaine; 5 parts of lauryl imidazoline betaine; 7 parts of cocamidopropyl betaine; 0.5 parts of graphene; 12 parts of polyvinyl alcohol; 1 part of guar gum were dissolved in 72 parts of water and stirred by high-speed shear to obtain a fire extinguishing agent. After testing, the fire was controlled within 7 seconds, the flame was very small within 10 seconds, and it was completely extinguished within 17 seconds.

[0028] From the above comparison, it can be seen that the amount of flame retardant active agent will affect the fire control and extinguishing time.

[0029] Example 4: 5 parts of hybrid fluorocarbon betaine; 3 parts of alkyl sulfonyl betaine; 8 parts of lauryl imidazoline betaine; 7 parts of cocamidopropyl betaine; 0.5 parts of graphene; 12 parts of polyvinyl alcohol; 1 part of sodium carboxymethyl cellulose were dissolved in 72 parts of water and stirred by high-speed shear to obtain a fire extinguishing agent. After testing, the fire was controlled within 6 seconds, the flame was very small within 9 seconds, and it was completely extinguished within 15 seconds.

[0030] Compared with Example 1, when sodium carboxymethyl cellulose is used as the thickener, the fire control and extinguishing time are similar.

[0031] Example 5: 5 parts of hybrid fluorocarbon betaine; 3 parts of alkyl sulfonyl betaine; 8 parts of lauryl imidazoline betaine; 7 parts of cocamidopropyl betaine; 0.5 parts of graphene; 12 parts of sodium polyacrylate; 1 part of guar gum were dissolved in 72 parts of water and stirred at high speed to obtain a fire extinguishing agent. After testing, the fire was controlled within 6 seconds, the flame was very small within 8 seconds, and it was completely extinguished within 15 seconds. Compared with Example 1, when sodium carboxymethyl cellulose is used as the stabilizer, the fire control and extinguishing time are similar.

[0032] The agent of the present invention contains a variety of flame retardant active agents, which can effectively inhibit the spread of flames and quickly reduce the intensity of combustion, which is helpful to quickly control and extinguish lithium battery fires. By adding stabilizers, the physical and chemical properties of the agent are ensured to be stable during storage and use, and it is not easy to decompose or fail, thereby ensuring the effectiveness and reliability of the agent. The application of thickener increases the viscosity of the agent, enabling it to form a protective film at the fire scene, more effectively covering the surface of the burning object and preventing oxygen from contacting it, thereby achieving a better fire extinguishing effect; like Figure 3 As shown, after being left for a period of time, the traditional fire extinguishing agent will settle and the stability of the agent will be greatly reduced.

[0033] like Figure 4 As shown, the addition of a small amount of graphene in the present application not only enhances the overall performance of the agent, but may also provide additional thermal conductivity or shielding functions, help dissipate heat or isolate heat sources faster, and further improve the fire extinguishing efficiency. Using sterile ionized water as a mixing agent effectively solves the problem of insolubility, and there will be no problems of deterioration and odor. In addition, the agent has high stability and will not have problems with agent sedimentation. The agent is environmentally friendly, will not cause secondary pollution while extinguishing a fire, and is relatively safe for the human body.

[0034] A lithium battery fire extinguisher uses a lithium battery fire extinguishing agent, including a tank body and a nozzle, wherein the nozzle is fixedly connected to the tank body, a spray switch is arranged on the nozzle, and the spray switch is fixedly connected to the nozzle, and the lithium battery fire extinguishing agent is loaded into the tank body through a high-pressure tank.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium battery fire extinguishing agent, characterized in that: The invention comprises a flame retardant active agent, a thickener and a stabilizer, and a mixing agent. The flame retardant active agent comprises a hybrid fluorocarbon betaine, an alkyl sulfonyl betaine, a lauryl imidazoline betaine and a cocamidopropyl betaine. It is composed of the following components in mass fractions: 2-10 parts of hybrid fluorocarbon betaine; 2-8 parts of alkyl sulfobetaine; 5-15 parts of lauryl imidazoline betaine; 5-10 parts of cocamidopropyl betaine; Graphene 0.1-0.6 parts; Stabilizer 5-25 parts; Thickener 0.3-1.5 parts; The balance is a mixture, which is sterile ionized water.

2. The lithium battery fire extinguishing agent according to claim 1, characterized in that: The thickener is guar gum or sodium carboxymethyl cellulose. When choosing guar gum, it is 0.3-1.2 parts, Select 0.4-1.5 parts of sodium carboxymethyl cellulose.

3. The lithium battery fire extinguishing agent according to claim 1, characterized in that: The stabilizer is polyvinyl alcohol or sodium polyacrylate, When polyvinyl alcohol is selected, 5-20 parts; When sodium polyacrylate is selected, it is 8-25 parts.

4. A method for preparing a lithium battery fire extinguishing agent, using the lithium battery fire extinguishing agent as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: Step S1: Raw material preparation: Calculate the required amount of each component based on the total amount required and the distribution ratio of each group of fire extinguishing agent; Step S2: dissolving the raw materials: introducing the calculated amount of the mixture into a dissolving container, and sequentially adding the flame retardant active agent, thickener, stabilizer and graphene; Step S3: Mixing and stirring: using a high-speed shear mixer to perform high-speed shear stirring on the mixed liquid until the mixed liquid is uniform and has no obvious particles; Step S4: Detection and adjustment: Detect the uniformity and stability of the mixed solution, and stir and adjust again; Step S5: preparing the solution: according to the percentage of the aqueous solution to be prepared, the mass of the fire extinguishing agent required is calculated, and the fire extinguishing agent is added into the water and stirred until it is completely dissolved to obtain the lithium battery fire extinguishing agent.

5. The method for preparing a lithium battery fire extinguishing agent according to claim 4, characterized in that: In step S3, the speed of the high-speed shear mixer is controlled at 10000-15000 r / min, and the speed is increased in a step-by-step manner. The initial speed is controlled at 20% for five minutes, and then the speed is increased to 50%. The particle dispersion of the mixed liquid is observed. If there is obvious particle agglomeration, the speed is gradually increased to 15000 r / min. Otherwise, if there is no obvious particle agglomeration, the speed is gradually increased to 10000 r / min.

6. The method for preparing a lithium battery fire extinguishing agent according to claim 4, characterized in that: In step S4, when particles are detected in the stirred mixed solution, the stirring time is extended by 20-25% until no particles are detected.

7. The method for preparing a lithium battery fire extinguishing agent according to claim 4, characterized in that: In the step S2, ultrasound is used for pulse-assisted dispersion when graphene is added. The pulse-assisted dispersion is set so that the ultrasound runs back and forth between starting and pausing. The starting time of each time is controlled within 3-5 seconds, and the pausing time is controlled within 7-10 seconds.

8. A lithium battery fire extinguisher, using the lithium battery fire extinguishing agent according to any one of claims 1 to 3, characterized in that: It comprises a tank body and a nozzle, wherein the nozzle is fixedly connected to the tank body, a spray switch is arranged on the nozzle, and the spray switch is fixedly connected to the nozzle, and the lithium battery fire extinguishing agent is loaded into the tank body through a high-pressure tank.

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