17results about How to "Reduce flammability" patented technology

The invention discloses a polyion liquid-based solid electrolyte, a preparation method thereof and a lithium ion battery, and belongs to the technical field of lithium ion batteries. The preparation method provided by the invention comprises the following steps: dispersing LLZTO nanoparticles into a polyacrylonitrile solution to obtain a spinning solution; performing electrostatic spinning on the spinning solution to obtain a composite fiber membrane; the preparation method comprises the following steps: mixing poly (diallyldimethylammonium) bis (fluorosulfonyl) imide, lithium bis (fluorosulfonyl) imide and 1-methyl-1-propyl pyrrolidinium bis (fluorosulfonyl) imide in a solvent to obtain a polyion liquid electrolyte solution; and immersing the composite fiber membrane into the polyion liquid electrolyte solution, taking out, standing and drying to obtain the composite fiber membrane. The solid electrolyte prepared by the invention has relatively high ionic conductivity and mechanical strength, and good flexibility and flame retardance, and a battery prepared from the solid electrolyte can circulate for more than 200 circles under high-rate current density.

This invention discloses an electrolyte and a battery. The electrolyte comprises an electrolyte, a solvent, and a first additive, the first additive having the structural formula (1). The first additive contains silicon-based phosphate groups, which have low oxidation and reduction potentials. It can generate an inorganic interface film rich in P and Si at the positive and negative electrodes. The generated interface helps to reduce the interfacial impedance of the positive and negative electrodes. Cyclic phosphates have good high-voltage stability. The generated phosphate compounds can suppress excessive ion deposition during the high-voltage positive electrode phase transition, providing better protection for the positive and negative electrode interfaces and improving high-voltage cycle performance. The polycyclic phosphate structure can capture hydroxyl radicals and hydrogen radicals generated by the electrolyte at high temperatures, preventing the diffusion reaction of hydrocarbon radicals. At the same time, the silicon-based structure can generate a stable thermally stable film at the positive and negative electrode interfaces. The generated high-thermal-stability inorganic thermal insulation protective layer can reduce the flammability of the electrolyte and significantly improve the safety performance of the battery.

This invention discloses a flame-retardant interface-stabilized electrolyte for high-voltage layered oxide sodium-ion batteries and its preparation method. The electrolyte comprises a composite sodium salt and a mixed organic solvent. The composite sodium salt includes sodium difluorosulfonylimide, sodium oxalate borate, and / or sodium difluorooxalate borate. The mixed organic solvent includes a phosphate ester flame-retardant solvent, a sulfone solvent, a hydrofluoroether diluent, and a small amount of electron-deficient nitrogen-containing aromatic nitrile interface-regulating molecules. This electrolyte does not rely on conventional additives such as ethylene carbonate and fluoroethylene carbonate. Through the flame-retardant framework solvent, anion-dominated film formation, and the regulating effect of electron-deficient aromatic nitrile on the residual alkali of layered oxides and the surface of high-valence transition metals, a stable and oxidation-resistant protective interface is formed on the positive electrode surface, while simultaneously ensuring low-resistance film formation on the hard carbon negative electrode side. This invention is applicable to high-voltage layered oxide sodium-ion batteries with cutoff voltages from 4.15 V to 4.50 V, and can simultaneously improve safety, long-cycle stability, and high-temperature storage performance.

The embodiment of the invention provides a secondary battery and electric equipment, and the secondary battery provided by the embodiment of the invention is characterized in that an electrolyte comprises a fluorine-containing organic solvent, a fluorine-containing lithium salt and a fluorine-containing additive; the fluorine-containing organic solvent comprises a fluorine ether saturated compound and a fluorine cyclic ester compound; the fluorine-containing additive comprises a fluoroether unsaturated compound; according to the electrolyte, the fluoroether saturated compound and the fluorine cyclic ester compound are used as solvents, the fluorine-containing lithium salt is used as an electrolyte, and the fluoroether unsaturated compound is added as an additive, so that the flammability of the electrolyte can be effectively reduced, and the fluoroether saturated compound not only can regulate and control the formation of an interface SEI membrane through molecular polarity, but also can regulate and control the flammability of the electrolyte. And the lithium ion secondary battery can also cooperate with fluorine-containing lithium salt to reduce interface impedance and inhibit generation of lithium fluoride (LiF) by-products, so that the problem of relatively poor cycle performance of the existing secondary battery is improved.

This invention relates to the field of building electromechanical installation technology, and discloses a BIM-based integrated layout and modular prefabrication and installation system for electromechanical pipelines. The system includes multi-disciplinary pipelines and integrated supports installed under the exterior building roof slab. The integrated supports include columns, combined steel beams, and pipe clamps. The pipe clamps are configured as variable-angle pipe clamp assemblies, comprising a variable-angle base connected to the combined steel beam and a clamp movably connected to the variable-angle base. The clamp has an adjustable degree of freedom to rotate relative to the horizontal direction within the vertical longitudinal section, so that the clamping axis of the clamp is aligned with the inclined axis of the inclined ramp section. This invention achieves zero-collision pre-assembly before construction, eliminates potential hazards from on-site demolition and alteration, precisely ensures the physical clearance height between driveways and parking spaces, and the modular prefabricated variable-angle damping pipe clamps passively adapt to and conform to the 45-degree inclined ramp path adjusted by BIM.

The invention discloses a battery combustion suppression device and system, the battery combustion suppression device comprises a shell, a gas channel for flowing of discharged gas is formed in the shell, and the shell is provided with a gas inlet communicated with a discharge port of a battery module or a battery pack and a gas outlet communicated with the outside; wherein at least part of the inner surface of the gas channel is provided with a perfluorohexanone fire extinguishing material, and the perfluorohexanone fire extinguishing material is used for releasing perfluorohexanone fire extinguishing gas and discharging the perfluorohexanone fire extinguishing gas from the gas outlet after the perfluorohexanone fire extinguishing gas is mixed with the discharged gas when the high-temperature and high-pressure discharged gas enters the gas channel through the gas inlet. The fire extinguishing material is introduced into the discharge path, so that the discharged gas is synchronously released and mixed in the flowing process to form low-oxygen and non-combustible mixed gas, eruptive combustion is inhibited before the gas is discharged, the safety of the lithium battery in the early stage of thermal runaway can be improved, the fire risk is reduced, and the service life of the lithium battery is prolonged. The method is suitable for safety protection of the battery module and the battery pack.

The invention relates to an electrolyte of a whole-chlorine solvent and an electrochemical device, the electrolyte of the whole-chlorine solvent comprises electrolyte salt and the whole-chlorine solvent, and the whole-chlorine solvent is composed of chlorinated ether and chlorinated carbonic ester. The electrolyte of the whole-chlorine solvent provided by the invention adopts the chlorinated ether and the chlorinated carbonate as the solvent of the electrolyte, does not contain flash point components, and has low volatility, low inflammability, flame retardance and compatibility with positive and negative electrodes, so that the battery shows good electrochemical performance and relatively high safety.

The application discloses a preparation method of a complex, and relates to the technical field of boron trifluoride production, and comprises the following steps: S1, vaporizing a ketone intermediate and mixing the ketone intermediate with boron trifluoride gas to perform a complexing reaction, so as to obtain a ketone-boron trifluoride complex; S2, adding diethyl ether drop by drop into the ketone-boron trifluoride complex to perform a coordination reaction, and obtaining a reaction mixture after the reaction is completed; and S3, washing, filtering and evaporating and drying the reaction mixture to obtain a boron trifluoride-diethyl ether complex. According to the preparation method, the intermediate complex is prepared first, and then the boron trifluoride-diethyl ether complex is prepared through a coordination reaction, so that the generation of impurities is reduced, the purity of a product is improved, the operation is safer, the stability of boron trifluoride is protected in the reaction process, and the volatilization and loss of boron trifluoride are reduced.

The utility model relates to the technical field of lithium battery crushing, and discloses a lithium battery crusher which comprises a crushing bin, a driving device is fixedly installed on the right side of the crushing bin, the upper portion of the crushing bin is communicated with a storage bin, an opening and closing device is arranged in the storage bin, the upper portion of the storage bin is communicated with a feeding port, and the upper portion of the feeding port is communicated with a discharging port. And a discharging device is arranged in the feeding opening, a cover plate is arranged at the top of the feeding opening, and a nitrogen inlet and a water inlet are formed in the front side of the upper end of the crushing bin. The crushing bin adopts double-layer fire extinguishing of nitrogen and an induction water nozzle, so that the flammability of materials is reduced, and the safety is improved; the explosion venting valve is adopted in the crushing area, so that the explosion phenomenon of materials in the crushing area is avoided, the safety of workers is improved, the safety of the working environment and the safety of the workers are improved, and damage to equipment is reduced.

The present invention relates to a method for manufacturing a lithium metal electrode, wherein the method comprises the following steps: providing a lithium metal strip; and placing a lubricant composition containing a fluorine solvent and a fluorine compound on the lithium metal strip, and rolling the lithium metal strip.

The application discloses a hydrogen injection strategy optimization method for a dual-fuel X-type rotor engine, obtains geometric parameters of the X-type rotor engine, establishes a CDF fluid simulation model of a dual-fuel X-type rotor engine with gasoline intake port premixing and hydrogen in-cylinder direct injection, determines engine ignition parameters and operating conditions of a single hydrogen injection strategy, and obtains, through simulation calculation, a hydrogen injection time point at which a hydrogen distribution area is maximum and a hydrogen injection time point at which a flame front area is maximum. Under the condition that the hydrogen injection total amount at the two hydrogen injection time points is the same as that of the single hydrogen injection strategy and the hydrogen injection mass fraction at the two hydrogen injection time points is taken as a variable, the hydrogen injection mass fraction corresponding to the hydrogen injection time point at which the hydrogen distribution area is maximum and the hydrogen injection mass fraction corresponding to the hydrogen injection time point at which the flame front area is maximum are obtained through simulation calculation, an optimal two-stage hydrogen direct injection strategy of the dual-fuel X-type rotor engine is obtained, and the thermal efficiency and emission performance of the rotor engine are improved.

The invention provides a PVC (Polyvinyl Chloride) pipe and a preparation method thereof. The PVC pipe is prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 1.6 to 4.8 parts of metal stearate, 10.0 to 14.0 parts of nitrile rubber, 0.8 to 1.4 parts of anti-aging agent ABS (Acrylonitrile Butadiene Styrene), 6 to 10 parts of flame retardant, 2.1 to 3.2 parts of lubricant, 9.0 to 9.5 parts of calcium carbonate, 4.0 to 5.0 parts of processing agent ACR, 2.2 to 3.2 parts of EVA (Ethylene-Vinyl Acetate), 0.6 to 0.9 part of plasticizer, 4.0 to 5.0 parts of color master batch, 1.0 to 5.0 parts of silicon rubber and 5.0 to 15.0 parts of heat-resistant filler. By adding the metal stearate into the raw materials, the thermal stability of the PVC pipe can be improved, the thermal degradation process can be delayed, by adding the flame retardant, the flame retardant property of the PVC pipe can be improved, and the flammability in a high-temperature environment can be reduced; by adding the silicone rubber, the heat resistance of the PVC pipe can be improved, and the cold resistance of the PVC pipe can be improved; and by adding the heat-resistant filler, the strength and heat resistance of the PVC pipe can be improved.

The application discloses a heat transfer composition and a preparation method and application thereof. According to the total mass of the composition, the mass proportions of a first component, trans-1,3,3,3-tetrafluoropropene and difluoromethane are x%, y% and z% respectively, the first component is 2,3,3,3-tetrafluoropropene and 1,1-difluoroethane, the proportions (x, y, z) of the three are located in a ternary phase diagram, the x coordinate of point A is 23.6%, the x coordinate of point B is 90.0%, the coordinates of points on the curve segment AB are (x, 70.06-0.6395x-0.001538x 2 , 29.94-0.3605x+0.001538x 2 ), and the coordinates of point C are (77.6, 0, 22.4). The composition has a GWP of not more than 150 and a flammability level of A2L, is a low-global-warming-potential, high-refrigeration / heat-efficiency and low-flammability heat transfer composition for replacing propane, and is suitable for refrigeration / heat application.

The present invention relates to the field of engine technology, and in particular to an air-breathing ramjet engine, which includes a cooling structure, which is composed of a phase change cooling chamber, a solid cooling pipe, a liquid cooling pipe, a liquid cooling pump, a phase change storage chamber, and a phase change cooling pump. The present invention utilizes a method of arranging a plurality of cooling pipes or structures, which are wrapped outside the combustion chamber of the ramjet engine, and effectively reduces the problem of failure of heat dissipation equipment caused by deformation of the combustion chamber during operation, while improving the performance of the ramjet engine, thereby effectively avoiding the decline of the combustion performance of the ramjet engine.

The invention relates to a building insulation board, which comprises the following raw materials by mass: 90-100 parts of aluminate cement; 10 to 15 parts of polyphenyl particles; 1-3 parts of polypropylene fiber; 4-6 parts of a foaming agent; 3-5 parts of acrylate and styrene copolymerized rubber powder; 6-8 parts of phosphoric acid; and 2-4 parts of aluminum hydroxide. The mode that modified polyphenyl particles are compounded in aluminate cement is adopted, the flammability of the insulation board can be reduced, the compounding property of the polyphenyl particles in the whole system can be improved, the integrality of the whole system is enhanced through the acrylate and styrene copolymer rubber powder and the polypropylene fiber, the overall strength of the building insulation board is guaranteed, and the building insulation board is suitable for being used as a building insulation board. And the foaming agent plays a role in foaming, so that the aim of preparing the light and heat-insulating heat-insulating plate can be finally achieved.

The invention relates to a preparation method of a flame-retardant washable water-based acrylate resin coating with moderate compatibility, which comprises the following steps: adding water, an emulsifier and methacrylic acid, stirring to react for 60 minutes, adding a monomer A, a charring agent intermediate, DOPO and 3, 4-epoxy-1-butene, and emulsifying for 20-30 minutes; heating to 80-90 DEG C, dropwise adding an initiator, reacting for 1-2 hours, adding diethanol amine, and reacting for 1-2 hours to obtain a core-layer emulsion; the preparation method comprises the following steps: adding a monomer A and a monomer B into a reaction kettle, dropwise adding a monomer B and an initiator at the same time, keeping the temperature at 75-85 DEG C, stirring and reacting for 1.5 hours, adding DOPO, 3, 4-epoxy-1-butene and an initiator, reacting for 1 hour at 60-70 DEG C, cooling to 50 DEG C, adding an emulsifier B, reacting for 30 minutes, and adding ammonia water to adjust the pH value to 7-8, so as to obtain the flame-retardant washable water-based acrylate resin coating with moderate compatibility, and the obtained acrylate resin has good flame retardance and washability.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a composite electrolyte and a preparation method and application thereof, the composite electrolyte comprises an organic solvent, an electrolyte lithium salt and an additive; and the additive comprises methyl trimethoxy silane, 1, 1, 2, 2-tetrafluoroethyl-2, 2, 2-trifluoroethyl ether and triethylene glycol monomethyl ether. By optimizing the formula and the adding proportion of the composite electrolyte additive, the thermal safety performance of the battery can be improved, the safety problem caused by thermal runaway is reduced, the flammability of the traditional organic electrolyte is reduced, and the combustion of the rechargeable battery is inhibited or avoided. In a charge-discharge test, the battery added with the composite flame retardant slightly improves the charge storage capacity of the battery at high temperature, and the specific capacity of the battery is improved; according to the present invention, under the variable magnification charge-discharge condition, the high specific capacity can be maintained, the rapid charge-discharge can be performed under the large current condition, the low energy consumption and the low heat generation can be maintained, and the strong high temperature stability can be provided;