Battery fire extinguishing liquid as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of new energy safety, and relates to a battery fire extinguishing liquid, in particular to a fire extinguishing liquid for battery fire as well as a preparation method and application thereof. The fire extinguishing fluid has a fluid shearing and thinning function by adding the nano material and the rheology modifier, firstly, the fire extinguishing fluid has certain viscosity in a static state, can be effectively adsorbed on the surface of a battery, and plays a continuous cooling role; then, when the fire extinguisher is ejected and released, the fire extinguishing liquid is reduced in viscosity under the action of pressure, easy to flow, good in ejection effect and small in residual quantity. Meanwhile, by adding efficient fire extinguishing components, the fire extinguishing performance of the fire extinguishing liquid is greatly improved. The fire extinguishing liquid can be applied to inhibition and extinguishing of battery fire, and the preparation method is simple and suitable for large-scale popularization and application.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy safety, and relates to a battery fire extinguishing liquid, and in particular to a battery fire extinguishing liquid, and a preparation method and application thereof. Background Art

[0002] In recent years, fire accidents in electric vehicles and energy storage power stations caused by new energy sources such as lithium batteries have occurred frequently. Efficient fire prevention and control technology is one of the key means to ensure the safe application of lithium batteries. Water is widely used in lithium battery fire fighting due to its excellent cooling effect, but ordinary fire fighting water has strong fluidity and needs to be continuously sprayed, which is easy to lose and has low effective utilization rate. According to the "China Fire Protection Yearbook (2022)", ordinary fire fighting water consumes 10-15 tons of water to extinguish a single electric vehicle fire, and the utilization rate is less than 30%, resulting in a large amount of water resources. Waste. At the same time, fire fighting water mainly uses physical fire extinguishing such as cooling, suffocation, and covering, and does not have more efficient chemical fire extinguishing capabilities. However, although the foam fire extinguishing agent solves the problem of fire fighting water loss, its high air content (more than 90% by volume) seriously affects the cooling effect of water.

[0003] Therefore, in order to address the current problems of low effective utilization rate of fire water and poor fire extinguishing effect, it is urgent to develop new water-based fire extinguishing technology. Summary of the invention

[0004] In view of this, the present invention discloses a battery fire extinguishing liquid, which is a battery fire extinguishing liquid, and can solve the current problems of low effective utilization rate of fire water and poor fire extinguishing effect.

[0005] It should be noted that the fire extinguishing liquid of the present invention has the function of shear thinning fluid by adding nanomaterials and rheology modifiers. First, it has a certain viscosity in a static state and can be effectively adsorbed on the surface of the battery to play a role in continuous cooling. Then, when it is sprayed and released by a fire extinguisher, the viscosity of the fire extinguishing liquid decreases under pressure, making it easy to flow, having a good spraying effect and little residue. At the same time, by adding high-efficiency fire extinguishing components, the fire extinguishing performance of the fire extinguishing liquid is greatly improved.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] The first technical purpose of the present invention is to provide a battery fire extinguishing liquid, the fire extinguishing liquid comprising the following components in percentage by mass:

[0008] Fire extinguishing base liquid 90%-98%, nano material 1%-8%, rheology regulator 0.01%-6%, flame retardant enhancer 0.5%-6%, surfactant 0.1%-3%.

[0009] Further, the fire extinguishing base liquid is an inorganic salt aqueous solution, and the mass concentration of the fire extinguishing base liquid is 0.5% to its saturated mass concentration; specifically, it includes one or a combination of magnesium ammonium phosphate aqueous solution, ammonium dihydrogen phosphate aqueous solution, ammonium polyphosphate aqueous solution, ammonia aqueous solution, urea aqueous solution, sodium dihydrogen phosphate aqueous solution, sodium phosphate aqueous solution, potassium bicarbonate aqueous solution, sodium bicarbonate aqueous solution, sodium carbonate aqueous solution, potassium carbonate aqueous solution, sodium chloride aqueous solution, potassium chloride aqueous solution, ammonium sulfate aqueous solution, ammonium bisulfate aqueous solution, ammonium aluminum sulfate aqueous solution, potassium aluminum sulfate aqueous solution, sodium borate aqueous solution, potassium ferrocyanide aqueous solution, cerium sulfate aqueous solution, yttrium sulfate aqueous solution.

[0010] It should be noted that the fire extinguishing base liquid is the key for the water-based fire extinguishing agent to achieve the cooling and fire extinguishing effects. The higher the content, the more obvious the effect. In the present invention, the mass ratio of the fire extinguishing base liquid can reach more than 98% at most, thus ensuring the cooling and fire extinguishing effects of the water-based liquid.

[0011] Further, the nanomaterial is one or a combination of surface-hydroxylated boron nitride nanomaterials, surface-hydroxylated carbon nanotubes, surface-hydroxylated iron oxide nanomaterials, surface-hydroxylated cerium dioxide nanomaterials, surface-hydroxylated cadmium telluride nanomaterials, surface-hydroxylated zinc sulfide nanomaterials, surface-hydroxylated carbon nitride nanomaterials, surface-hydroxylated titanium carbide nanomaterials, surface-hydroxylated silicon dioxide nanomaterials, and the particle size of the nanomaterial is 10 - 100 nanometers.

[0012] And the surface hydroxylation modification method of the nanomaterial can be completed according to the existing publicly available technologies, such as: acid-base etching method, solvothermal / hydrothermal method, silane coupling agent modification method, plasma treatment method, etc.

[0013] It should be noted that the smaller particle size of the nanomaterial can make the particles better suspended in the water-based liquid. At the same time, the surface hydroxylation modification can make the particles easier to fuse with the water-based liquid and form a three-dimensional network structure in combination with the rheology regulator; in addition, the polar interaction between the surface hydroxyl groups of the nanomaterial and the electrolyte enhances the wetting of the battery pores; furthermore, the nanomaterial and the flame retardant synergist form a porous ceramicized barrier at high temperature, effectively blocking oxygen and providing flame retardancy and heat insulation.

[0014] Further, the rheology regulator is one or a combination of carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylate, sodium polyacrylate, polyvinylpyrrolidone, sodium alginate, guar gum, xanthan gum.

[0015] It should be noted that the nanomaterials and rheology modifiers in the aqueous fire extinguishing agent are the key to enabling the aqueous solution to form a shear-thinning fluid. When the aqueous solution is stationary, the nanomaterials and rheology modifiers form a three-dimensional network structure through hydrogen bonds, van der Waals forces, etc., resulting in a high viscosity of the aqueous solution. When a shear force is applied (e.g., the fire extinguishing agent is released through pressure), the three-dimensional network structure is temporarily disrupted, and the particles / molecules are arranged along the flow direction, reducing the frictional force and increasing the fluidity. When it is stationary again, the three-dimensional network structure is re-formed, the viscosity increases, and it remains stable (e.g., the fire extinguishing liquid forms a covering layer on the battery surface).

[0016] Furthermore, the flame retardant synergist is one or a combination of more than one of aluminum hydroxide, magnesium hydroxide, zinc borate, expanded graphite, bentonite, vermiculite, and montmorillonite.

[0017] It should be noted that the flame retardant synergist used in the present invention has a covering flame retardant effect when used in combination with the nanomaterials, and can play a synergistic effect with the fire extinguishing components in the fire extinguishing base liquid.

[0018] Furthermore, the surfactant is one or a combination of more than one of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, alkylphenol polyoxyethylene ether, cocamidopropyl betaine, and potassium perfluorooctanesulfonate.

[0019] It should be noted that the surfactant used in the present invention can form a compounding effect with the nanomaterials, improving the dispersion stability of the nanomaterials and the foaming performance of the aqueous solution.

[0020] The second technical object of the present invention is to provide a preparation method of the battery fire extinguishing liquid as described above, including the following steps:

[0021] 1) Add the nanomaterials to the fire extinguishing base liquid and perform ultrasonic treatment for pre-dispersion;

[0022] 2) Add the rheology modifier, flame retardant synergist, and surfactant in sequence and stir until it reaches a uniform state to obtain the battery fire extinguishing liquid as described above.

[0023] The third technical object of the present invention is to provide an application of the battery fire extinguishing liquid as described above.

[0024] Furthermore, fill the fire extinguishing liquid into a fire extinguisher and drive it with nitrogen to form an aqueous fire extinguishing equipment, and the fire extinguisher is any one of a portable fire extinguisher, a wheeled fire extinguisher, a fixed fire extinguisher, and a prefabricated fire extinguisher.

[0025] Furthermore, the application of the battery fire extinguishing liquid in battery fire extinguishing.

[0026] Specifically, the fire extinguishing liquid can be used to extinguish any one of lithium battery fires, zinc-manganese battery fires, nickel-metal hydride battery fires, fuel cell fires, zinc-air battery fires, and nickel-cadmium battery fires.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] (1) Dynamic viscosity adjustment: The nanomaterials and rheological modifiers construct a "shear-thinning fluid", with a high viscosity forming a covering layer at rest and a low viscosity rapidly penetrating under impact;

[0029] (2) Nanoscale wetting: Utilize the polar interaction between the hydroxyl groups on the surface of the nanomaterials and the electrolyte to enhance the wetting of the pores of the battery;

[0030] (3) Thermal barrier effect: The nanomaterials and flame retardant synergists form a porous ceramicized barrier at high temperatures, effectively blocking oxygen and providing flame retardancy and heat insulation. Specific embodiments

[0031] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions claimed by the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] To better illustrate the content of this application, numerous specific details are given in the following specific embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In the embodiments, some methods, means, instruments, equipment, etc. well-known to those skilled in the art are not described in detail to highlight the gist of this application. In addition, the substances used in the following embodiments and comparative examples are all substances commonly used in conventional tests in the art.

[0033] Furthermore, the nanomaterials used in the following embodiments are all nanomaterials with hydroxylated surfaces, and the method for hydroxylation modification of the surface of the nanomaterials: can be completed according to the existing publicly available technologies, such as: acid-base etching method, solvothermal / hydrothermal method, silane coupling agent modification method, plasma treatment method, etc.

[0034] Example 1

[0035] Place 80 g of boron nitride nanomaterials with a particle size of 75 nanometers in a 10 mol / L NaOH solution, stir and react at 150 °C for 20 hours, and obtain hydroxylated boron nitride nanomaterials through centrifugation, washing, and drying; then add the hydroxylated boron nitride nanomaterials to 3856 g of an aqueous solution of ammonium dihydrogen phosphate with a mass concentration of 10%, perform ultrasonic treatment for 30 minutes for pre-dispersion, and then sequentially add 40 g of carboxymethyl cellulose, 20 g of aluminum hydroxide, and 4 g of sodium dodecyl sulfate and stir until a uniform state is obtained to obtain a fire extinguishing liquid. Fill the fire extinguishing liquid into a 4 kg fire extinguisher and charge nitrogen to a pressure of 1.6 MPa to obtain a battery fire extinguishing device.

[0036] Example 2

[0037] Disperse 320 g of iron oxide (Fe₃O₄) nanomaterials with a particle size of 15 nm in an ethanol-water (1:1) mixture, add a small amount of tetraethyl orthosilicate (TEOS), and dropwise add ammonia water to catalyze hydrolysis. Obtain hydroxylated iron oxide (Fe₃O₄) nanomaterials through centrifugation, washing, and drying. Then, add the hydroxylated iron oxide (Fe₃O₄) nanomaterials to 3609.6 g of an aqueous solution of magnesium ammonium phosphate with a saturated concentration, perform ultrasonic treatment for 30 minutes for pre-dispersion, and then sequentially add 0.4 g of polyacrylate, 30 g of zinc borate, and 40 g of sodium dodecylbenzenesulfonate and stir until a homogeneous state is obtained to get a fire extinguishing liquid. Fill the fire extinguishing liquid into a 4 kg fire extinguisher and fill it with nitrogen to a pressure of 1.6 MPa to obtain a battery fire extinguishing device.

[0038] Example 3

[0039] Mix 40 g of cerium dioxide (CeO₂) nanomaterials with a particle size of 25 nm with hydrogen peroxide, keep stirring at 85 °C for 48 hours, and after the reaction, the product is centrifuged, washed, and dried to obtain hydroxylated cerium dioxide (CeO₂) nanomaterials. Then, add the hydroxylated cerium dioxide (CeO₂) nanomaterials to 3690 g of an aqueous solution of potassium bicarbonate with a mass concentration of 0.5%, perform ultrasonic treatment for 30 minutes for pre-dispersion, and then sequentially add 20 g of sodium alginate, 240 g of bentonite, and 10 g of alkylphenol polyoxyethylene ether and stir until a homogeneous state is obtained to get a fire extinguishing liquid. Fill the fire extinguishing liquid into a 4 kg fire extinguisher and fill it with nitrogen to a pressure of 1.6 MPa to obtain a battery fire extinguishing device.

[0040] Example 4

[0041] Lay 45 g of silica (SiO₂) nanomaterials with a particle size of 100 nm flat on the sample stage of a radio frequency plasma device, introduce oxygen and start the plasma, and perform glow discharge treatment for 30 minutes to obtain hydroxylated silica (SiO₂) nanomaterials. Then, add the hydroxylated silica (SiO₂) nanomaterials to 3856 g of an aqueous solution of potassium alum with a saturated concentration, perform ultrasonic treatment for 30 minutes for pre-dispersion, and then sequentially add 240 g of guar gum, 20 g of vermiculite, and 80 g of cocamidopropyl betaine and stir until a homogeneous state is obtained to get a fire extinguishing liquid. Fill the fire extinguishing liquid into a 4 kg fire extinguisher and fill it with nitrogen to a pressure of 1.6 MPa to obtain a battery fire extinguishing device.

[0042] Comparative Example 1

[0043] Without adding nanomaterials on the basis of Example 1, compare the influence of nanomaterials on the performance of the fire extinguishing liquid.

[0044] Disperse 3856 g of an aqueous ammonium dihydrogen phosphate solution with a mass concentration of 10% by ultrasonic treatment for 30 minutes, then successively add 40 g of carboxymethyl cellulose, 20 g of aluminum hydroxide, and 4 g of sodium dodecyl sulfate and stir until a homogeneous state is obtained to get the fire extinguishing liquid. Fill the fire extinguishing liquid into a 4 kg fire extinguisher and charge nitrogen to a pressure of 1.6 MPa to obtain the battery fire extinguishing device.

[0045] Comparative Example 2

[0046] On the basis of Example 1, the main fire extinguishing components of the fire extinguishing base liquid are not added to compare the influence of the main fire extinguishing components of the fire extinguishing base liquid on the performance of the fire extinguishing liquid.

[0047] Place 80 g of boron nitride nanomaterials with a particle size of 75 nm in a 10 mol / L NaOH solution, stir and react at 150 °C for 20 hours, and obtain hydroxylated boron nitride nanomaterials through centrifugation, washing, and drying; then add the hydroxylated boron nitride nanomaterials to 3856 g of pure water, disperse them by ultrasonic treatment for 30 minutes, and then successively add 40 g of carboxymethyl cellulose, 20 g of aluminum hydroxide, and 4 g of sodium dodecyl sulfate and stir until a homogeneous state is obtained to get the fire extinguishing liquid. Fill the fire extinguishing liquid into a 4 kg fire extinguisher and charge nitrogen to a pressure of 1.6 MPa to obtain the battery fire extinguishing device.

[0048] Comparative Example 3

[0049] On the basis of Example 1, the rheology modifier is not added to compare the influence of the rheology modifier on the performance of the fire extinguishing liquid.

[0050] Place 80 g of boron nitride nanomaterials with a particle size of 75 nm in a 10 mol / L NaOH solution, stir and react at 150 °C for 20 hours, and obtain hydroxylated boron nitride nanomaterials through centrifugation, washing, and drying; then add the hydroxylated boron nitride nanomaterials to 3856 g of an aqueous ammonium dihydrogen phosphate solution with a mass concentration of 10%, disperse them by ultrasonic treatment for 30 minutes, and then successively add 20 g of aluminum hydroxide and 4 g of sodium dodecyl sulfate and stir until a homogeneous state is obtained to get the fire extinguishing liquid. Fill the fire extinguishing liquid into a 4 kg fire extinguisher and charge nitrogen to a pressure of 1.6 MPa to obtain the battery fire extinguishing device.

[0051] Comparative Example 4

[0052] On the basis of Example 1, the flame retardant synergist is not added to compare the influence of the flame retardant synergist on the performance of the fire extinguishing liquid.

[0053] 80 g of boron nitride nanomaterials with a particle size of 75 nm were placed in a 10 mol / L NaOH solution, and stirred and reacted at 150 °C for 20 hours. Hydroxylated boron nitride nanomaterials were obtained through centrifugation, washing, and drying. Then, the hydroxylated boron nitride nanomaterials were added to 3856 g of an aqueous ammonium dihydrogen phosphate solution with a mass concentration of 10%, and ultrasonically treated for 30 minutes for pre-dispersion. Then, 40 g of carboxymethyl cellulose and 4 g of sodium dodecyl sulfate were added in sequence and stirred until a homogeneous state was obtained to get the fire extinguishing liquid. The fire extinguishing liquid was filled into a 4 kg fire extinguisher and charged with nitrogen to a pressure of 1.6 MPa to obtain a battery fire extinguishing device.

[0054] Comparative Example 5

[0055] Based on Example 1, no surfactant was added to compare the influence of the surfactant on the performance of the fire extinguishing liquid.

[0056] 80 g of boron nitride nanomaterials with a particle size of 75 nm were placed in a 10 mol / L NaOH solution, and stirred and reacted at 150 °C for 20 hours. Hydroxylated boron nitride nanomaterials were obtained through centrifugation, washing, and drying. Then, the hydroxylated boron nitride nanomaterials were added to 3856 g of an aqueous ammonium dihydrogen phosphate solution with a mass concentration of 10%, and ultrasonically treated for 30 minutes for pre-dispersion. Then, 40 g of carboxymethyl cellulose and 20 g of aluminum hydroxide were added in sequence and stirred until a homogeneous state was obtained to get the fire extinguishing liquid. The fire extinguishing liquid was filled into a 4 kg fire extinguisher and charged with nitrogen to a pressure of 1.6 MPa to obtain a battery fire extinguishing device.

[0057] Application Example:

[0058] A square ternary lithium battery (the battery cathode material is NCM811, and the single battery capacity is 100 Ah) was vertically fixed on an iron stand, and 4 thermocouples were arranged in the front, back, left, and right to measure the battery surface temperature. The battery was made to undergo thermal runaway through overcharging, and then the battery fire extinguishing devices prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were used respectively. The fire extinguishing liquid was released from above the battery to extinguish the battery until no more fire extinguishing liquid could be sprayed. After the fire extinguishing was completed, the weight of the fire extinguisher was weighed to calculate the remaining amount of the fire extinguishing liquid; the weight of the battery after fire extinguishing and the weight of the battery after the surface covering was cleaned were weighed to calculate the residual amount of the fire extinguishing liquid on the battery surface. In addition, the above fire extinguishing liquid was placed in a conical flask and left to stand at room temperature for 6 months to observe whether the fire extinguishing liquid showed stratification and sedimentation phenomena to evaluate its storage stability.

[0059] The test results are shown in Table 1:

[0060] Table 1

[0061]

[0062] The test results of Examples 1-4 show that the fire extinguishing liquid has good cooling and fire extinguishing effects and can effectively inhibit lithium battery fires; the test results of Comparative Example 1 show that without adding nanomaterials, the shear-thinning fluid effect cannot be formed. Only under the action of the rheology modifier, the viscosity of the fire extinguishing liquid is large, too much remains in the fire extinguisher, the utilization rate is low, and the problem of battery re-ignition cannot be inhibited; the test results of Comparative Example 2 show that without adding the main fire extinguishing component of the fire extinguishing base liquid, the fire extinguishing effect is poor; the test results of Comparative Example 3 show that without adding the rheology modifier, the viscosity of the fire extinguishing liquid is too low to form a retention and covering effect on the battery surface, and nanomaterial sedimentation is likely to occur; the test results of Comparative Example 4 show that without adding the flame retardant synergist, re-ignition is likely to occur; the test results of Comparative Example 5 show that without adding the surfactant, nanomaterial sedimentation is likely to occur.

[0063] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery fire extinguishing liquid, characterized in that, The fire extinguishing liquid contains the following components by mass percentage: Fire extinguishing base liquid 90%-98%, nanomaterials 1%-8%, rheology regulator 0.01%-6%, flame retardant synergist 0.5%-6%, surfactant 0.1%-3%.

2. The battery fire extinguishing liquid according to claim 1, wherein The mass concentration of the fire extinguishing base liquid is 0.5% to its saturated mass concentration, and the fire extinguishing base liquid is an inorganic salt aqueous solution.

3. The battery fire extinguishing liquid according to claim 2, wherein, The fire extinguishing base liquid includes one or a combination of magnesium ammonium phosphate aqueous solution, ammonium dihydrogen phosphate aqueous solution, ammonium polyphosphate aqueous solution, ammonia aqueous solution, urea aqueous solution, sodium dihydrogen phosphate aqueous solution, sodium phosphate aqueous solution, potassium bicarbonate aqueous solution, sodium bicarbonate aqueous solution, sodium carbonate aqueous solution, potassium carbonate aqueous solution, sodium chloride aqueous solution, potassium chloride aqueous solution, ammonium sulfate aqueous solution, ammonium bisulfate aqueous solution, ammonium aluminum sulfate aqueous solution, potassium aluminum sulfate aqueous solution, sodium borate aqueous solution, potassium ferricyanide aqueous solution, cerium sulfate aqueous solution, yttrium sulfate aqueous solution.

4. The battery fire extinguishing liquid according to claim 1, characterized in that, The nanomaterials are one or a combination of surface-hydroxylated boron nitride nanomaterials, surface-hydroxylated carbon nanotubes, surface-hydroxylated iron oxide nanomaterials, surface-hydroxylated cerium oxide nanomaterials, surface-hydroxylated cadmium telluride nanomaterials, surface-hydroxylated zinc sulfide nanomaterials, surface-hydroxylated carbon nitride nanomaterials, surface-hydroxylated titanium carbide nanomaterials, surface-hydroxylated silica nanomaterials, and the particle size of the nanomaterials is 10-100 nanometers.

5. The battery fire extinguishing liquid according to claim 1, characterized in that, The rheology regulator is one or a combination of carboxymethyl cellulose, hydroxyethyl cellulose, polyacrylate, sodium polyacrylate, polyvinylpyrrolidone, sodium alginate, guar gum, xanthan gum.

6. The battery fire extinguishing liquid according to claim 1, wherein The flame retardant synergist is one or a combination of aluminum hydroxide, magnesium hydroxide, zinc borate, expanded graphite, bentonite, vermiculite, montmorillonite.

7. The battery fire extinguishing liquid according to claim 1, characterized in that, The surfactant is one or a combination of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, alkylphenol polyoxyethylene ether, cocamidopropyl betaine, potassium perfluorooctanesulfonate.

8. The preparation method of the battery fire extinguishing liquid according to claim 1, characterized in that, It includes the following steps: 1) Add the nanomaterials to the fire extinguishing base liquid and perform ultrasonic treatment for pre-dispersion; 2) Add the rheology regulator, flame retardant synergist, and surfactant in sequence and stir until it is in a uniform state to obtain the battery fire extinguishing liquid.

9. The application of the battery fire extinguishing liquid according to any one of claims 1-7, characterized in that, Fill the battery fire extinguishing liquid into a fire extinguisher and form a water-based fire extinguishing equipment driven by nitrogen. The fire extinguisher is any one of a portable fire extinguisher, a wheeled fire extinguisher, a fixed fire extinguisher, and a prefabricated fire extinguisher.

10. Use of the battery fire extinguishing liquid according to any one of claims 1-7 in battery fire extinguishing, characterized in that, The battery is any one of a lithium battery, a zinc-manganese battery, a nickel-metal hydride battery, a fuel cell, a zinc-air battery, and a nickel-cadmium battery.

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