50 results about "Hydrofluoroether" patented technology

The invention provides a supercritical lithium metal battery electrolyte with electric field adaptability and application, and belongs to the technical field of lithium metal batteries. Comprising a lithium salt, a main solvent and a diluent, has the characteristic of adaptively stabilizing a lithium metal negative electrode under the action of an electric field, and is a supercritical state electrolyte obtained by dissolving the lithium salt in the main solvent to form a solution with the concentration being greater than or equal to 5 mol / L and diluting the solution with the diluent; the main solvent is at least one of chain ester, chain ether and siloxane, the diluent is hydrofluoroether, and the volume ratio of the main solvent to the diluent is 1: (0.5-20). The lithium metal negative electrode shows stable self-adaptive capacity under the action of an electric field, and formation of lithium dendrites is inhibited by promoting decomposition of anions at the negative electrode to form SEI rich in inorganic components, so that long-time stable circulation of a high-voltage lithium metal battery is realized.

The invention belongs to the field of solid-state batteries, and particularly relates to a lithium metal battery, a high-voltage wide-temperature-range gel polymer electrolyte of the lithium metal battery, a preparation method of the high-voltage wide-temperature-range gel polymer electrolyte and application of the high-voltage wide-temperature-range gel polymer electrolyte. The high-voltage wide-temperature-range gel polymer electrolyte is prepared; the composite monomer comprises a monomer 1 and a monomer 2 in a weight ratio of (1-2): (1-2), the monomer 1 comprises a compound as shown in a formula 1 (1), and the monomer 2 comprises a compound as shown in a formula 2 (2); the basic electrolyte comprises a conductive lithium salt and an ester ether solvent, and the conductive lithium salt comprises LiPF6; the ester-ether solvent comprises an ester solvent, a fluorinated ester solvent and hydrofluoroether in a weight ratio of (4-5): (2-3): (2-3). The electrolyte disclosed by the invention can meet the application requirements of high pressure and wide temperature range, and the high-pressure, low-temperature and high-temperature cycling stability of the electrolyte is improved.

The application discloses application of high-thermal-stability hydrofluoroether, and the high-thermal-stability hydrofluoroether has a structural formula of HCF2CF2CF2CF2CH2OCF2CF2H, and is used as a coolant for a cooler of a temperature control device in a semiconductor product processing process, and has the advantages that the high-thermal-stability hydrofluoroether with the specific molecular structure is used as the coolant for the cooler of the temperature control device in the semiconductor product processing process, the substance is compatible with most materials in a wide temperature range, has good thermal stability, chemical inertia and non-corrosiveness, is non-toxic in the use process, has good environmental and safety characteristics, has an ODP value of 0 and a very low GWP value, and the substance has excellent dielectric properties, low viscosity and high resistivity, and is especially suitable for a heat transfer fluid in a semiconductor wafer etching process.

The application belongs to the technical field of lithium batteries, and provides a locally high-concentration ionic liquid modified electrolyte, a preparation method and application thereof.The ionic liquid modified electrolyte provided by the application takes a stachydrine ionic liquid and a diluent hydrofluoroether and / or fluorophosphate as a main body, adds specific cosolvents and lithium salts, well dissolves the stachydrine ionic liquid and the diluent, and forms a homogeneous phase.Compared with a traditional carbonate electrolyte, the ionic liquid modified electrolyte has high conductivity, low viscosity, a wide electrochemical window, non-flammability and non-volatility, and high lithium ion transference number;further used for assembling lithium batteries, still can maintain good charge and discharge capacity after running at different rates, has good cycle stability and service life, lithium battery cycle number is greater than or equal to 80 cycles, and even can reach 220 cycles, average coulombic efficiency is greater than or equal to 96.5%, and even can reach 98.6%.

The application provides a fire-retardant immersion type cooling liquid for high-multiplicity lithium iron phosphate battery packs and a preparation method thereof, raw materials of the fire-retardant immersion type cooling liquid include, in percentage by weight, 85-95% fluorine compound base carrier, 5-15% phosphorus-nitrogen composite fire retardant; the fluorine compound base carrier contains low-boiling-point hydrofluoroether, branched-chain perfluoropolyether and h-BN nanosheet, and the fire retardant is a microencapsulated ammonium polyphosphate and melamine cyanurate compound system. The preparation is completed through carrier mixing, nanosheet composite dispersion, fire retardant compounding and vacuum degassing. The application realizes high heat dissipation, high insulation, UL94 V-0 level halogen-free fire retardancy and more than 6 months of stable performance, solves problems such as high viscosity, slow heat dissipation, poor fire retardancy, environmental protection hidden danger and insufficient stability of traditional cooling liquids, and adapts to the safety cooling demand of high-multiplicity lithium iron phosphate battery packs.

The invention discloses an electronic liquid seal flame-retardant material and application thereof, the material comprises a fluorine-containing polymer, a rheology modifier and a functional nano-material in a mass ratio of (70-99.5): (0-20): (0-10); wherein the fluorine-containing compound is one or more of perfluoroether, perfluoroamine, perfluoroketone and hydrofluoroether; the rheology modifier is one or more of polytetrafluoroethylene, fatty acid, fatty acid salt, polyurea and hydrocarbon wax; the functional nano material is one or more of silicon oxide, aluminum oxide, aluminum hydroxide, magnesium hydroxide, hydrotalcite, clay and calcium carbonate. When the electronic liquid seal flame-retardant material is used for liquid seal of electronic devices and systems, flame-retardant and explosion-proof effects can be achieved.

This invention relates to the field of coating technology, specifically to an anti-corrosion electronic-grade coating agent and its preparation method. The anti-corrosion electronic-grade coating agent, by weight, comprises the following raw materials: 5-8 parts acrylate, 10-20 parts fluorinated acrylate, 9-11 parts fluorosilicone resin, 0.6-2 parts coupling agent, 0.06-1 part initiator, and 80-130 parts hydrofluoroether. The coating agent prepared by this invention exhibits excellent corrosion resistance, high adhesion, good insulation, and is safe to operate without a flash point.

This application discloses a lithium-ion battery electrolyte, its preparation method, and its application. The provided lithium-ion battery electrolyte comprises a lithium salt and an organic solvent; wherein the lithium salt comprises a combination of at least two selected from lithium hexafluorophosphate, lithium difluorobis(oxalato)phosphate, lithium difluorosulfonylimide, and lithium di(oxalato)borate; and the organic solvent comprises 30wt%-50wt% hydrofluoroether, 10wt%-30wt% acetate, and 20wt%-60wt% carbonate. The provided lithium-ion battery electrolyte maintains the integrity of the separator structure, enables lithium salt to fill pores, and reduces separator permeability, thereby controlling possible separator shrinkage during temperature changes at low or high temperatures; it also suppresses crosstalk between the positive and negative electrodes caused by gas penetration, enabling batteries prepared using the provided lithium-ion battery electrolyte to exhibit good cycle performance and rate performance at low temperatures, and high safety at high temperatures.

The present invention relates to a cleaning agent composition which is excellent in cleaning property and does not corrode plastic substrates such as polycarbonate and polystyrene which are not resistant to solvents. The cleaning agent composition of the present invention comprises the following (A) to (C) components, the mass ratio of the (A) component and the (B) component being 11:89 to 99:1, (A) cis-1-chloro-3,3,3-trifluoropropene, (B) one or more compounds selected from the group consisting of hydrofluoroolefins, hydrofluorocarbons and hydrofluoroethers which do not contain a chlorine atom, and (C) a hydrocarbon solvent.

Provided is a cleaning solution having a low global warming potential value and having particle removal properties equal to or higher than those of conventional hydrofluoroethers. The present invention relates to a cleaning solution for removing particles, the cleaning solution containing a hydrofluoroether, the hydrofluoroether being a compound represented by general formula (1).

This application discloses a battery cell, a battery, and an electrical device. One embodiment of the battery cell includes a negative electrode and an electrolyte. The negative electrode includes a current collector stacked on top of each other and an active material film containing active material particles, the active material particles being carbonaceous materials. The electrolyte includes a lithium salt, an organic solvent, and additives. The additives include a first additive and a second additive. The first additive includes a hydrofluoroether compound. The second additive has the general formula NO3-R1, where R1 includes substituted or unsubstituted carbonaceous heterocycles. The first additive in the electrolyte can reduce lithium-ion solvation. Further combined with the second additive, it is reduced and decomposed on the surface of the carbonaceous material to generate lithium nitrogen oxides, forming a dense, stable SEI film with high inorganic content on the surface of the carbonaceous material. This forms a stable interface layer between the carbonaceous material and the organic solvent, reducing side reactions between the carbonaceous material and the electrolyte, reducing lithium consumption, and improving cycle performance.

The invention belongs to the technical field of fluorine chemical double-carbon emission reduction, and particularly relates to a method for synthesizing hydrogen-containing fluoroether through electro-catalysis continuous decarboxylation of perfluorocarboxylic acid and salt thereof. According to the method, a perfluorinated proton membrane is used as a diaphragm, an electrolytic cell is divided into an anode and a cathode, perfluorinated carboxylic acid and salt thereof are used as reaction raw materials, a mixture of water and a polar aprotic solvent is used as a solvent mother solution, and the solvent mother solution and the reaction raw materials are mixed and then continuously introduced into the anode side of the electrolytic cell for electro-catalysis; the effluent flowing out from the anode side is subjected to rectification separation, light components containing the hydrogen-containing fluoroether and water are distilled out, a hydrogen-containing fluoroether product is obtained through liquid separation, meanwhile, the separated water is recycled and mixed with the residual liquid obtained after rectification to form recycled mother liquor, recycling of the mother liquor is achieved, and recycling of the hydrogen-containing fluoroether product is achieved. And continuously supplementing equimolar perfluorocarboxylic acid into the recycled mother liquor according to the output of the product, thereby realizing the continuous production of the hydrogen-containing fluoroether. According to the method, the output of waste liquid is reduced, meanwhile, hydrogen is co-produced on the cathode side, and the utilization efficiency of energy is improved.

The application provides a preparation method of solid electrolyte powder and a lithium ion battery. The preparation method comprises the following steps: step S1, performing preliminary crushing on a solid electrolyte material to obtain pre-milling powder; step S2, dispersing the pre-milling powder in a solvent and wet milling to form a slurry; and step S3, removing the solvent in the slurry to obtain the solid electrolyte powder. The solvent is a composite solvent, and the composite solvent comprises a hydrofluoroether and an ester compound. By using the composite solvent comprising the hydrofluoroether and the ester compound to wet mill the solid electrolyte material, the dispersion effect of the solid electrolyte powder is significantly improved, the solid electrolyte powder with a smaller particle size is obtained, meanwhile, the ionic conductivity of the solid electrolyte powder still maintains a high level, and the cycle stability of the battery is significantly improved.

The invention belongs to the technical field of flux cleaning liquid, and particularly relates to a preparation method of cleaning liquid for flux cleaning. The preparation method comprises the following steps: preparing a component A: adding 38-43 parts by weight of C10-C13 isoalkane, 15-19 parts by weight of 2-methylpentane and 6-8 parts by weight of ethyl acetate into a stirring kettle, and stirring for 10-30 minutes at normal temperature at 200-400 rpm; sequentially adding 10-15 parts by weight of modified lauryl alcohol polyoxyethylene ether and 5-7 parts by weight of an alcohol ether compound, and continuously stirring for 10-30 minutes; adding 0.5-0.7 part by weight of methylbenzotriazole, 0.3-0.5 part by weight of a fluorocarbon surfactant and other assistants, and stirring at a rotating speed until the assistants are completely dissolved to obtain a component A; 83-88 parts by weight of a hydrofluoroether compound and 10-20 parts by weight of a fluorinated solvent are added into the stirring kettle, stirring is conducted at the normal temperature at 200-400 rpm till complete dissolution is achieved, and the component B is obtained; and uniformly mixing the component A and the component B according to a mass ratio of 2: 1 to 4: 1. Through the compounding proportion of the component A and the component B, the system can be stabilized within the tolerable temperature of the chip packaging piece, and the cleaning effect and the anti-deformation requirement are both considered.

The invention provides fluorine-containing electronic cooling liquid based on modified silicone oil, a preparation method and application, and relates to the field of phase change cooling liquid formulas, the cooling liquid comprises a component A and a component B, the component A is modified silicone oil, the component A accounts for 10-80% of the volume fraction of the fluorine-containing electronic cooling liquid, the component B is hydrofluoroether, and the component B accounts for 20-90% of the volume fraction of the fluorine-containing electronic cooling liquid; and n1 + n2 is equal to 50-70. According to the fluorine-containing electronic cooling liquid based on the modified silicone oil, the preparation method and the application, the use amount of an electronic fluorinated liquid is reduced, the cost can be effectively reduced, and the fluorine-containing electronic cooling liquid is more environment-friendly and has good heat conduction capability and phase change heat dissipation capability.

A hydrofluoroether composition is provided that can suppress the formation of acid components even at high temperatures (e.g., above 90°C). A hydrofluoroether composition comprising 1,1,1,2,3,3-hexafluoro-3-[2-(1,1,2,3,3,3-hexafluoropropoxy)ethoxy]propane and 1,2,3,3,3-pentafluoro-1-[2-(1,1,2,3,3,3-hexafluoropropoxy)ethoxy]-1-propene, wherein the content of 1,2,3,3,3-pentafluoro-1-[2-(1,1,2,3,3,3-hexafluoropropoxy)ethoxy]-1-propene is 0.0001% by mass or more and less than 2.0000% by mass.

The invention relates to the technical field of solar cell manufacturing, and discloses an interfacial polymerization lossless packaging method of a perovskite solar cell, which comprises the following steps: S1, dissolving 0.2 mmol of fluorine-containing diamine monomer, dispersing amino-functionalized nano silicon dioxide particles in 10mL of non-polar solvent A, and stirring and mixing at 20-30 DEG C to obtain a precursor solution A; and S2, spin-coating the precursor solution A on the surface of the perovskite solar cell, volatilizing to remove the solvent, and forming the fluorine-containing diamine monomer coating on the surface of the cell. Monomers are dissolved by adopting a specific non-polar solvent system such as hydrofluoroether and normal hexane, and interface in-situ polymerization is carried out at normal temperature, so that the risk of dissolution corrosion of a traditional polar solvent to a perovskite layer and a transport layer is thoroughly avoided, and meanwhile, thermal damage caused by a high-temperature hot-pressing process is avoided; lossless packaging in the whole process is achieved, and therefore the initial photoelectric conversion efficiency of the device is reserved to the maximum degree.

The present invention relates to an organic working fluid composition, in particular for use in an organic Rankine cycle (ORC) engine for generating electricity from waste heat. Generally, such working fluid compositions include an organofluorine component (e.g., a hydrofluoroether, such as a hydrocarbyl-perfluorocarbon ether), a diluent component (e.g., DCE), and a superwetting agent.

The present application belongs to the technical field of fluorinated chemical industry double-carbon emission reduction, and specifically relates to a method for electrocatalytic continuous decarboxylation synthesis of hydrogen-containing hydrofluoroether from perfluorocarboxylic acid and its salt. The method uses a perfluoroproton membrane as a diaphragm to divide an electrolytic cell into an anode and a cathode, uses perfluorocarboxylic acid and its salt as a reaction raw material, and uses a mixture of water and a polar aprotic solvent as a solvent mother liquor. After mixing the solvent mother liquor with the reaction raw material, the mixture is continuously fed into the anode side of the electrolytic cell for electrocatalysis. The effluent flowing out of the anode side is separated by rectification, and the light components containing hydrogen-containing hydrofluoroether and water are distilled off. Hydrogen-containing hydrofluoroether products are obtained by liquid separation, and the separated water is reused and mixed with the remaining liquid after rectification to form a reused mother liquor, realizing the recycling and application of the mother liquor. Subsequently, according to the output of the product, an equal amount of perfluorocarboxylic acid is continuously added to the reused mother liquor to realize continuous production of hydrogen-containing hydrofluoroether. The method reduces the output of waste liquid, and hydrogen is produced on the cathode side, improving the energy utilization efficiency.

A liquid composition comprising one or more compound of formula (I): CFHX—CF2—O—R—O—CF2—CFHX (I), one or more compound of formula (II): CFHX—CF2—O—R—OH (II) wherein: —R in formulas (I) and (II) is independently selected from C2-C10 divalent linear or branched alkyl, optionally including a cycle, an aromatic ring and / or oxygen heteroatoms engaged in ether bonds, X is selected from halogens, H, Rf, wherein Rf is selected from: —a C1-C8 fully or partially fluorinated linear or branched alkyl optionally including a cycle, or—a C1-C3 fully or partially fluorinated alkoxy, the two instances of X in formula (I) being the same or different, preferably being the same, —the amount of the one or more compounds of formula (II) is from 0.002 to 5% by weight of the one or more compounds of formula (I).

The invention discloses a rocket storage tank interior cleaning agent, which comprises a cleaning main material, a performance strengthening material and an additive, the cleaning main material comprises decafluoro-3-methoxy-2-trifluoromethylpentane and linseed oil derived plant source hydrofluoroether, and the performance strengthening material comprises a low temperature treatment material, a nanometer strengthening material, a low temperature anti-freezing material and a feedback protection material. The low-temperature treatment material comprises genetically modified psychrophilic lipase, glutamic acid tetrasodium diacetate and ethylenediamine tetraacetic acid, the nano reinforcing material comprises SiO2 (at) TiO2 core-shell nanoparticles, the low-temperature anti-freezing material comprises potassium acetate, ethylene glycol and propylene glycol, and the feedback protection material comprises BTA-encapsulated microcapsules and fluorescein diacetate. The spraying effects of low-temperature cleaning, rust removal, corrosion inhibition and intelligent monitoring reminding can be synchronously achieved, the storage tank maintenance procedure is reduced, the low-temperature active bottleneck is broken through under the action of the low-temperature treatment material, the liquid hydrogen storage tank cleaning technology blank is filled up, and the application range is wider.

The application provides a catalytic method for preparing methyl perfluorobutyl ether from hexafluoropropylene trimer, and belongs to the technical field of hydrogen fluoride ether preparation. Seven-fluoro-isobutenyl methyl ether, perfluorocarbon and a solid catalyst are put into a fluorination reactor, fluorine-nitrogen mixed gas is introduced for fluorination reaction, the reaction is terminated when the molar ratio of the seven-fluoro-isobutenyl methyl ether to the introduced fluorine gas reaches a set ratio, tail gas is removed, and methyl perfluorobutyl ether is obtained through filtration and rectification. The method uses hexafluoropropylene trimer as a solvent which can be recycled and used, is green and environment-friendly, has high product purity, and the reaction yield can reach more than 75%.

The application discloses a method for synthesizing, collecting and purifying fluorine-containing ester intermediates, and comprises the following steps: S10, introducing hydrofluoroether (HFE) and chlorine into a container in sequence, and reacting under 365 nm ultraviolet irradiation, wherein the concentration ratio of the reactants is HFE:chlorine ≤ 2:1; S20, stopping the ultraviolet irradiation when the reaction in the step S10 is completed; S30, condensing the gas in the container through a low-temperature cold trap to obtain a condensate; and S40, repeatedly performing volatilization-condensation operation on the condensate to remove volatile components and enrich the fluorine-containing ester intermediates. The method has the advantages of simple process, strong universality and good repeatability, can simultaneously meet the requirements of in-situ continuous experiment in a gas bag and collection and purification as a standard sample, and solves the problems that fluorine-containing ester intermediates are difficult to obtain, are prone to secondary reaction and are difficult to separate and purify in the prior art.

The application provides a hydrofluoroether purification method, and belongs to the technical field of hydrofluoroether preparation. The method can remove three impurities, namely, an aprotic polar solvent, water and an alcohol or phenol which is not soluble in water, in a hydrofluoroether crude product by reacting an anhydride with the impurities in the hydrofluoroether crude product, so as to generate an acid ester with high boiling point, which is convenient for subsequent simple rectification separation and improves the purity of the hydrofluoroether. The purification method does not require low temperature, water and oxygen-free conditions, has low cost, mild reaction conditions, short reaction time, simple operation, is green, environmentally friendly, safe and reliable, has low requirement on equipment, and the purity of the obtained hydrofluoroether after treatment is all above 99.95%.

The invention discloses a preparation method of asymmetric hydrofluoroether, and belongs to the technical field of organic fluorine chemical synthesis. The asymmetric hydrofluoroether is 1-methoxy heptafluoropropane, and the method comprises two continuous reaction steps: step S1, in an inert atmosphere, mixing fluorophosgene and a fluorination catalyst in an anhydrous stable solvent until the mixture is saturated, and slowly introducing tetrafluoroethylene to generate perfluoropropionyl fluoride; and S2, directly introducing the reaction mixture obtained in the step S1 into a reactor, and reacting with a methylation reagent and an optional alcohol auxiliary agent to generate 1-methoxyheptafluoropropane without separation and purification of an intermediate product. According to the present invention, the cheap raw material tetrafluoroethylene is adopted, and the catalyst combination, the solvent system and the process control are optimized, such that the high total yield, the high selectivity and the safe and continuous process are achieved under the mild condition, and the method is suitable for industrial production.

The present application provides a preparation method of hydrofluoroether, comprising the following steps: using amino alcohol and fluorine-containing olefin as raw materials, and performing addition reaction under the condition that neutral ionic liquid is used as catalyst and solvent; the neutral ionic liquid comprises at least one of fluorine-containing neutral ionic liquid. The inventor finds that using fluorine-containing neutral ionic liquid as catalyst can effectively improve the yield and purity of hydrofluoroether, and avoid the generation of unsaturated impurities under alkaline conditions. In addition, the fluorine-containing neutral ionic liquid used in the present application is easy to recover, can be recycled, and has the advantages of no corrosion of the reactor, no pollution to the environment, easy control of the reaction and no waste salt generation, etc., and is suitable for industrial production.

The present disclosure relates to an electrolyte solution for a lithium secondary battery, which contains an ether having no fluorine atom; a hydrofluoroether; a cyclic compound represented by Formula (1); an additive which is at least one selected from the group consisting of a sulfite ester, a sulfate ester, a sulfonate ester, and an alkyl sulfone; and lithium bis(fluorosulfonyl)imide.

In order to solve the problems of high low-temperature viscosity, low volume resistivity and high pour point of a cooling liquid used in an existing semiconductor manufacturing process, the invention provides an oxa-hydrofluoroether compound for a coolant, a preparation method of the oxa-hydrofluoroether compound, a coolant composition and application of the oxa-hydrofluoroether compound. The oxa-hydrofluoroether compound comprises a compound as shown in a structural formula 1: R1-R-OCF2CF2OCH3, wherein R is selected from F or perfluoroalkyl, and R2 is selected from F or perfluoroalkyl; r1 is selected from perfluoroalkyl; m is a natural number of 0-5, and n is a positive integer of 1-10. The oxa-hydrofluoroether compound provided by the invention has the advantages of high boiling point, low pour point, high volume resistivity, low viscosity at-60 DEG C, low GWP100 value, high chemical stability, good thermal stability and high temperature control precision. The oxa-hydrofluoroether compound provided by the invention is used for a cooling agent, has a wide temperature difference, can be used under the condition of a wide temperature range, and meets the requirements of the cooling liquid in a semiconductor manufacturing process.

The invention relates to the technical field of polyurethane materials, in particular to a foaming agent composition, a composite material for polyurethane resin, the polyurethane resin and a preparation method and application of the polyurethane resin. The foaming agent composition provided by the invention is prepared from the following components in percentage by mass: 30%-67% of trans-dichloroethylene, 0.7%-6.5% of a first regulator, 2%-8.5% of a second regulator and 30%-56% of dibasic acid ester, the first regulator is selected from at least one of volatile halogenated hydrocarbon and a volatile epoxy compound; and the second regulator is selected from at least one of hydrofluorocarbon and hydrofluoroether. The foaming agent composition disclosed by the invention is relatively slow in foaming in a system, relatively thick foam holes are easily formed in rapidly-swelled polyurethane, and the surface compactness and hardness can be improved while relatively high internal physical properties are ensured, so that the foaming agent composition can be used for preparing a polyurethane outsole with low density, high hardness, good mechanical properties and a good paint spraying effect.

The application belongs to the field of electrolyte, and particularly relates to a high-voltage wide-temperature-range composite electrolyte for a lithium metal battery and preparation and application thereof, the electrolyte is a solution containing a conductive lithium salt, an organic solvent and an additive; wherein the organic solvent contains solvent A and solvent B; the solvent A contains a solvent with the structure of formula 1, and the solvent B contains a hydrofluoroether; wherein the solvent A is 10-50wt% of the organic solvent; the concentration of the conductive lithium salt is 1-5M; the additive is 0.5wt%-5wt% of the total weight of the conductive lithium salt and the organic solvent; and the additive contains a compound with formula 2. The application innovatively combines the organic solvent with formula 1 and the additive with formula 2, and controls the content of each component, so that the synergistic effect can be achieved, the lithium metal battery and its high voltage and super wide temperature range application requirements can be adapted, and stable circulation in the super wide temperature range under high voltage can be achieved.