28results about How to "Good low temperature" patented technology

The invention provides a synthetic lubricating oil composition and application thereof, and belongs to the technical field of lubricating oil. The synthetic lubricating oil composition comprises base oil, a pour point depressant and a composite additive, the base oil comprises synthetic ester base oil; the synthetic ester base oil consists of low-viscosity synthetic ester and high-viscosity synthetic ester. The composition has ultrahigh viscosity index and low-temperature performance, is diesel engine lubricating oil with very excellent low-temperature performance, passes a graphite flake friction characteristic test and a THOT oxidation test required by TES 439 specifications, and can meet the lubrication requirements of an engine and a transmission system.

The utility model relates to battery liquid cooling technical field, concretely refers to a kind of liquid-cooled battery PACK, including PACK battery shell and the butt joint top cover of movable sleeve connection on the PACK battery shell top outside surface, the butt joint base of movable sleeve connection on the PACK battery shell inner side wall surface, battery pack of movable sleeve connection on the butt joint base inner side wall surface and the butt joint top cover top inner side wall surface, the inner side wall surface of PACK battery shell is provided with the inner container sleeve shell of movable sleeve connection on the butt joint base and battery pack outside surface.Simultaneously cooperate the low-temperature cooling water inside the water guide cavity between PACK battery shell and inner container sleeve shell to carry out cooling treatment to the inner side wall surface of inner container sleeve shell, so that the inner side wall surface of inner container sleeve shell is in low-temperature state, and the low-temperature cooling water inside water guide cavity will be through and communicate with the hollow water guide pipe inside water guide cavity inside to make cooling water enter the inside of hollow water guide pipe.

This invention discloses a battery output circuit with uninterrupted low power consumption, high efficiency, and boost voltage regulation, comprising: a battery; diode one, the anode of which is connected to the positive terminal of the battery; a boost chip, pin 1 of which is connected to the positive terminal of the battery; diode two, the anode of which is connected to pin 2 of the boost chip; a load, pin 1 of which is connected to the cathodes of diodes one and two, pin 3 of which is connected to pin 4 of the boost chip; and pin 2 of the load, pin 3 of the boost chip, and the negative terminal of the battery grounded. Under normal load operation, when the boost chip is turned on, the input voltage of the load will not decrease with the increase of the operating current, effectively solving the defect of battery voltage fluctuation with changes in output current, especially at low temperatures. The boost chip is not always on during system operation, effectively improving its lifespan.

This invention relates to the field of sodium-ion battery technology, specifically to a rapid screening method for low-temperature sodium-ion batteries and its application. The method involves assembling positive electrode, negative electrode, separator, and electrolyte into different sodium-ion batteries, followed by charging and formation. Q-V data for each sodium-ion battery during the formation process are obtained, and dQ / dV-V curves are plotted to determine the peak position and area of ​​the redox peak. After formation, the sodium-ion batteries undergo aging and capacity testing to obtain finished sodium-ion batteries. Under low-temperature conditions, the finished sodium-ion batteries are subjected to DCR testing to obtain their low-temperature DCR resistance. Based on the peak position and area of ​​the redox peak and the low-temperature DCR resistance, the low-temperature performance of different sodium-ion batteries is determined. This method can quickly and accurately screen sodium-ion battery systems with relatively superior low-temperature performance, shortening the cell low-temperature performance testing cycle and improving the screening efficiency of low-temperature sodium-ion batteries.

This invention discloses a composite expander and its application in the negative electrode plate of a lead-acid battery, belonging to the field of lead-acid battery technology. Ammonium persulfate is used as an oxidant, added to an ethanol solution mixture of pyrrole / aniline monomers (conductive monomers), sodium lignosulfonate, and acrylamide, causing an oxidation reaction. Subsequently, it is calcined at high temperature under a nitrogen or argon atmosphere to obtain a compound in which a composite polymer encapsulates sodium lignosulfonate. After calcination under a protective gas atmosphere, some of the composite material carbonizes, forming a carbon-encapsulated sodium lignosulfonate composite expander. The carbon-encapsulated composite expander can slow down the consumption of sodium lignosulfonate. Using the composite expander results in a higher hydrogen evolution overpotential and more durable low-temperature performance. The application of the composite expander in the negative electrode plate of a lead-acid battery improves the sulfation problem of the negative electrode plate operating under high efficiency partial charge conditions, extending the cycle life of the lead-acid battery.

The invention discloses a reactive cationic asphalt emulsifier and a preparation method and application thereof, and belongs to the technical field of road engineering materials, the emulsifier has a [A]-[B]-[C] three-section structure, [A] is an epoxy chain segment, [B] is a polyether chain segment (which is a polyether flexible chain segment), and [C] is a polyamine and derivative chain segment thereof. Precise regulation and control of the performance of the emulsifier can be realized by regulating and controlling the type of epoxy resin, the types of polyamine and derivatives thereof, the molecular weight of polyether (such as polyethylene glycol diglycidyl ether) and the amine hydrogen / epoxy ratio. Emulsified asphalt prepared by adopting the emulsifier has the advantages of excellent storage stability, outstanding low-temperature ductility, firm interface bonding (forming a covalent bond with asphalt) and the like, and can be widely applied to road maintenance projects such as micro-surfacing, slurry seal and cold regeneration.

The invention relates to the technical field of electrochemistry, in particular to a sodium ion battery. The sodium ion battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, the negative electrode comprises a negative electrode material layer, the non-aqueous electrolyte comprises a sodium salt, a solvent and an additive, the additive comprises a sulfur-containing compound and silane phosphate, and the silane phosphate is selected from a compound as shown in a structural formula 1; the sodium ion battery satisfies the following conditions: 0.2 < = (a + b) / c < = 3.5, 0.1 < = a < = 2, 0.1 < = b < = 1, and 0.85 < = c < = 1.15. By limiting the relationship among the content a of the compound as shown in the structural formula 1, the content b of the sulfur-containing compound and the compaction density c of the negative electrode material layer, the impedance of the battery can be effectively reduced, the gas production of the battery is reduced, and the low-temperature and rate performance of the sodium-ion battery is improved.

This invention discloses a high-safety, high-cycle-life in-situ cured gel polymer electrolyte and its preparation method, belonging to the field of lithium-ion battery technology. The electrolyte is formed by in-situ polymerization of a gel precursor solution inside the battery triggered by an energy field. The precursor solution contains acrylamide and / or methacrylamide polymerizable monomers, multifunctional acrylate and / or methacrylate crosslinking agents, phosphorus-containing polymerizable flame-retardant components, an initiator, lithium salt, and an organic solvent. The preparation method includes preparing the precursor solution, injecting it into the pores of the battery cell, and in-situ curing triggered by heat or ultraviolet light. Through the synergistic effect of in-situ gelation and gradient electrodes, continuous and stable ion transport channels and flame-retardant networks are constructed within the electrode pores, thereby simultaneously improving the battery's abuse safety and low-temperature cycle life.

This invention relates to the field of electrochemical energy storage technology, and in particular to a novel high-entropy electrolyte based on a eutectic solvent and its application in electrochemical devices such as low-temperature secondary batteries and supercapacitors. The eutectic solvent high-entropy electrolyte of this invention is composed of at least five eutectic solvents; each eutectic solvent consists of a hydrogen bond acceptor and a hydrogen bond donor; the hydrogen bond acceptor is one of choline chloride, tetraethylammonium chloride, tetrabutylammonium chloride, zinc chloride, magnesium chloride, lithium perchlorate, and water; the hydrogen bond donor is one of urea, citric acid, lactic acid, acrylic acid, itaconic acid, formic acid, ethylene glycol, glycerol, acetamide, formamide, and water. The eutectic solvent high-entropy electrolyte of this invention not only lowers the liquid-solid transition temperature of the electrolyte, achieving better low-temperature performance, but also has the advantages of low raw material cost and environmental friendliness.

The utility model discloses a portable medicinal refrigeration box belongs to the field of medicine refrigeration technology, the utility model discloses a box body and setting in the medicine taking tray of taking medicine of box body. The box body includes the top cover, the side plate and the bottom plate of connection in proper order. The number of side plate is 4, and 4 side plate surrounds and forms the box wall, is equipped with the medicine taking door for taking medicine on the side plate. The bottom plate is detachably connected with the box wall, and the surface of the bottom plate is equipped with a plurality of independent grooves for placing ice blocks. The medicine taking tray is arranged on the bottom plate, and a plurality of independent medicine storage compartments are arranged in the medicine taking tray. Each medicine storage compartment can put medicine from the top and take medicine from the side. The utility model discloses a medicine taking tray, and a plurality of independent medicine storage compartments are arranged on the medicine taking tray. Medicine can be placed in the medicine storage compartment, reducing the temperature influence between medicines.

The utility model relates to a kind of fireproof structure of building deformation joint, belong to deformation joint technical field.The fireproof structure of building deformation joint, comprising: deformation gap, two building walls are combined to form deformation gap, the inside of the deformation gap is provided with cover plate, the both sides of the cover plate are penetrated to the inside of adjacent wall;Fireproof mechanism, the fireproof mechanism is installed in the inside of deformation gap, the fireproof mechanism is set in the below of cover plate;Wherein, the fireproof mechanism includes the fireproof rock wool fixedly connected in the below of cover plate;Combustion medium is gradually consumed in limited space, and combustion temperature is gradually reduced, mixed gas mass enters the inside of top cavity frame, top cavity frame keeps relatively good low-temperature effect, mixed gas mass exchanges heat through top cavity frame, and is discharged to both ends outside, reduces the situation that flame continues to burn fiercely, forms protection to the flame of combustion, and reduces the trend that flame burns surrounding building.

The invention discloses a special fire extinguishing agent for a lithium battery and application thereof, and belongs to the field of fire extinguishing agents. The agent is prepared from the following components in percentage by mass: 0.15% of potassium dodecyl benzene sulfonate, 0.1% of coconut oil fatty acid diethanolamide, 0.04% of ethylene glycol, 0.01% of sodium acetate, 0.02% of glycerol, 0.01% of EDTA (Ethylene Diamine Tetraacetic Acid) disodium and the balance of deionized water. The permeation and spreadability of the agent are enhanced through the synergistic effect of the composite surfactant, the lithium battery thermal runaway fire is efficiently extinguished in combination with the low-temperature stability and flame suppression of ethylene glycol and the HF neutralizing capacity of sodium acetate, open fire can be extinguished within 30 seconds without reburning, and the generation amount of HF is lower than 1 ppm; meanwhile, the specific resistance of the agent is larger than 10 M omega.cm, use is safe, damage to the battery is small, and the agent is suitable for lithium battery fire prevention and control of electric automobiles, energy storage power stations and other scenes.

The invention relates to the technical field of hydrogenated butadiene-acrylonitrile rubber, in particular to carboxyl hydrogenated liquid butadiene-acrylonitrile rubber, a preparation method thereof and vulcanized rubber. The invention discloses a preparation method of carboxyl hydrogenated liquid butadiene-acrylonitrile rubber, which comprises the following steps: in the presence of a solvent, hydrogen and a catalyst, providing raw materials of the carboxyl hydrogenated liquid butadiene-acrylonitrile rubber, and carrying out contact reaction including double decomposition and hydrogenation, wherein the raw material for providing the carboxyl hydrogenated liquid nitrile rubber is selected from carboxyl nitrile rubber or nitrile rubber and unsaturated carboxylic acid. The preparation method is simple, and has the advantages of mild reaction conditions, high reaction rate and controllable product molecular weight.

The application relates to the field of negative electrode materials, and particularly discloses a core-shell structure graphite negative electrode material with a radial gradient defect distribution and a preparation method and use thereof; the negative electrode material comprises a graphite core, a transition layer and an outer shell layer from inside to outside; the negative electrode material is obtained by sequentially performing gradient etching, laser annealing, depositing a pre-lithiation layer and an amorphous carbon layer on oxidized graphite, and finally fluorinating the outermost layer; the radial gradient defect distribution of the negative electrode material realizes the synergistic optimization of ion transmission kinetics and electronic conductivity; when the negative electrode material is applied to a lithium ion battery, the electrochemical performance of the negative electrode material is excellent, the negative electrode material has the characteristics of high initial efficiency, fast charging, low temperature and long cycle life, and can be mass-produced.

The present application relates to the technical field of lubricating grease, and particularly relates to a steel wire rope lubricating grease and a preparation method thereof. The steel wire rope lubricating grease comprises the following components in percentage by weight: base oil 40-70%, petroleum-based wax or synthetic wax 5-25%, tackifier 5-30%, sepiolite 3-15%, antirust agent 0.5-5%, antioxidant 0.5-5%, and anti-wear agent 0.5-5%; the base oil is selected from one or more of naphthenic base oil, poly-alpha olefin, extracted oil and asphalt. The lubricating grease provided by the present application can improve the dropping point and high-temperature performance of the product, solve the problems of high-temperature oil dripping and low-temperature brittle cracking of the existing product, has a wide use temperature range, and has excellent adhesion, high-low temperature performance, rust resistance and anti-wear performance, and can meet the requirements of lubricating performance and service life of the steel wire rope under harsh conditions such as high temperature and low temperature.

The utility model discloses vacuum continuous casting equipment for a vertical oxygen-free copper pipe, which belongs to the technical field of oxygen-free copper rod continuous casting machines, solves the problem that the existing device is poor in cooling effect due to the fact that air is blown to the surface of a copper rod to cool the copper rod, and comprises a unit body, a crystallizer and a traction roller component, three crystallizers are fixedly connected to the top face of the unit body, an L-shaped plate is fixedly installed on the rear side of the top face of the unit body, a traction roller assembly is fixedly installed on the top face of the L-shaped plate, and a cooling assembly used for cooling copper pipes discharged out of the crystallizers is arranged on the side wall of the L-shaped plate. Cooling liquid in the water tank is conveyed into the water inlet pipe through the water pump, then the cooling liquid in the water inlet pipe enters the cooling pipes, the three cooling pipes are filled with the cooling liquid through the arrangement of the connecting pipes, then the copper pipe is cooled, heat exchange is conducted between the copper pipe and the cooling liquid, and the cooling effect on the copper pipe is improved.

This invention provides a two-dimensional triangular lattice rare-earth-based titanate polycrystalline material, its preparation method, and its applications. The chemical formula of the rare-earth-based titanate polycrystalline material is Ba6M2Ti4O. 17 The space group is P63 / mmc, where M is one or more of Nd, Gd, and Yb. The novel two-dimensional triangular lattice rare-earth-based titanate polycrystalline material provided by this invention has a compact structure, a simple preparation process, and its frustrated structure of localized electron spins significantly reduces the minimum cooling temperature to the tens of millikons. Furthermore, it exhibits high magnetic ion density and large cooling capacity, making it an excellent magnetic refrigerant.

This application discloses a low-temperature aqueous electrolyte, its preparation method, and its application, belonging to the technical field of aqueous electrolytes. The low-temperature aqueous electrolyte provided by this application comprises a metal salt, an additive, water, and a co-solvent; the metal salt is selected from one or more of lithium chloride, lithium nitrate, lithium perchlorate, lithium hexafluorophosphate, lithium bis(trifluoromethanesulfonyl)imide, sodium chloride, sodium hexafluorophosphate, sodium tetrafluoroborate, sodium nitrate, potassium chloride, potassium nitrate, magnesium chloride, magnesium perchlorate, zinc perchlorate, and zinc chloride; the additive is calcium chloride; and the co-solvent is ethylene glycol. The aqueous electrolyte provided by this application uses ethylene glycol, which has low toxicity, as a co-solvent, achieving excellent low-temperature performance while reducing the lithium salt concentration in the aqueous electrolyte, and also possesses advantages such as being environmentally friendly, relatively inexpensive, and safe and flame-retardant.

This application discloses a lithium manganese iron phosphate (LFP) cathode material, its preparation method, and its applications. The LFP cathode material comprises LFP particles, which, based on the iron content distribution, are sequentially divided into a core region, a middle region, and a surface region from the center of the LFP particles towards the surface. The middle region covers the core region, and the surface region covers the middle region. From the core region to the middle region, the iron content in the first composite region (forming the core and middle regions) decreases gradually; from the middle region to the outer surface of the surface region, the iron content in the second composite region (forming the middle and surface regions) increases gradually. The LFP cathode material of this application exhibits high compaction density, high energy density, and a high voltage plateau, as well as good cycle performance and low-temperature performance. Its preparation ensures the stability of the electrochemical performance of the prepared LFP cathode material.

The application discloses a secondary electrolyte injection method and an alkali metal ion battery thereof, and the secondary electrolyte injection method comprises the following steps: injecting a first electrolyte into a semi-finished product battery cell and sealing, aging, standing and forming, wherein the first electrolyte comprises an electrolyte salt, a non-aqueous solvent and a basic additive; continuously injecting a second electrolyte, and obtaining an alkali metal secondary battery after secondary sealing and capacity distribution; the second electrolyte comprises the first electrolyte, a first additive and a second additive; the first additive is lithium fluorosulfonate or sodium fluorosulfonate, and the second additive is at least one of a fluorine-containing pyridine compound shown in the following formula (I) or a fluorine-containing imidazole compound shown in the following formula (II), and the specific structure is referred to the description. Through the secondary injection of the first additive and the second additive, the high-temperature cycle performance, the high-temperature storage performance and the low-temperature cycle performance of the battery can be improved, the rate discharge performance of the battery is improved, and the power of the battery is improved.

This invention discloses a lubricating grease for automotive electric window regulators and its preparation method. By mass fraction, it comprises the following components: 54%-63% polyalphaolefin synthetic oil, 6%-7% silicone oil, 10%-13% thickener, 15%-23% solid lubricant, 1%-1.5% rust inhibitor, 1%-2% antioxidant, and 1%-1.8% polymer; wherein the weight ratio of polyalphaolefin synthetic oil to silicone oil is 9:1; and the viscosity of the silicone oil at 25°C is within 100 mmHg. 2 / s-750mm 2 / s; the viscosity range of polyalphaolefin synthetic oil at 100℃ is 4mm. 2 / s-10mm 2 / s; The thickener is lithium stearate, produced by reacting fatty acids with an aqueous solution of lithium hydroxide. This invention uses silicone oil and PAO oil together as base oils. After thickening the base oils with a thickener, a high-lubricity solid lubricant is added to develop a grease with excellent low-temperature performance, excellent lubricity, excellent low odor, and excellent dust resistance. It is suitable for lubricating the friction pairs of electric window lift guide rails, wire ropes, pulleys, and winding reels, meeting the product requirements of window lifters.

The invention relates to the technical field of lithium battery negative electrodes, and discloses a preparation method of a high-energy-density super-long-life fast-charging negative electrode material and a lithium battery, the preparation method of the negative electrode material comprises the following steps: preheating graphite under the protection of inert gas, then introducing carbon source gas and oxygen-containing gas, carrying out deposition reaction at 350-450 DEG C under normal pressure for 0.5-4 hours, and carrying out vacuum drying to obtain the high-energy-density super-long-life fast-charging negative electrode material. The functional carbon coating layer is formed on the surface of the negative electrode material. By adopting a low-temperature vapor deposition carbon coating technology, an amorphous disordered layer structure carbon layer is constructed on an artificial graphite substrate, an oxygen-containing functional group is introduced at the same time, the functionalized carbon coating layer provides a three-dimensional ion transmission channel, the interface impedance is remarkably reduced, the wettability of an electrolyte is improved, and the service life of the electrolyte is prolonged. And the problems of quick charging, low-temperature performance and cycle life can be synchronously solved.

The invention discloses a zinc-based flow battery electrolyte and application thereof, and belongs to the technical field of electrochemical energy storage. The electrolyte is an aqueous solution containing a zinc salt and an additive, and the additive comprises a calcium salt and a magnesium salt; the additive also comprises one or more of lithium salt, sodium salt and strontium salt. Wherein Ca < 2 + > and Mg < 2 + > can strongly interact with water molecules, and a hydrogen bond network in the electrolyte is effectively weakened, so that the freezing point is remarkably reduced; and a small amount of other added metal cations generate a synergistic effect with Ca < 2 + > and Mg < 2 + >, so that the electrolyte still keeps excellent electrochemical properties such as high ionic conductivity and the like while obtaining an ultra-low freezing point. On the basis, the electrolyte successfully realizes stable circulation of the zinc-iodine flow battery in an extremely low-temperature environment. The electrolyte is low in cost, safe and environment-friendly, and a reliable technical scheme is provided for widening the application scene of the zinc-based flow battery to the extreme low-temperature field.

The invention provides a positive active material and a preparation method thereof, a positive pole piece, a battery and electric equipment, the positive active material comprises secondary particles formed by primary particles, the positive active material comprises Li1 + aFebMc (PO4) d,-0.1 < = a < = 0.1, 0 < b < = 1, 0 < = c < = 0.5, 0 < d < = 1, and M comprises at least one of La, Ce, Cr, Mo, Ca, Hf, Ti, Fe, Zn, Y, Zr, W, Nb, Sm, Sb, Co, Ni, V, Mg, Na, B and Al; the porosity of the positive electrode active material is 6.5%-15%, and the average pore size of the positive electrode active material is 145 nm-290 nm. The battery containing the positive electrode active material provided by the invention has excellent capacity, rate capability and cycle performance.

This invention discloses a toughened-self-healing composite modified No. 50 Grade A asphalt and its preparation method, belonging to the technical field of road engineering materials. The asphalt comprises the following raw materials: 100 parts of No. 50 Grade A road petroleum asphalt; 5.0-8.0 parts of functional monomer A; 1.0-4.0 parts of self-healing microcapsules; 0.04-0.112 parts of initiator; and 0.05-0.24 parts of crosslinking agent. The functional monomer A is composed of styrene and butyl acrylate in a mass ratio of 25:75-35:65. A one-step preparation method is used, where styrene and butyl acrylate are copolymerized in situ in the asphalt and lightly crosslinked to achieve toughening, while the introduction of self-healing microcapsules imparts a self-healing function. This invention improves the low-temperature ductility, high-temperature stability, storage stability, and damage self-healing ability of asphalt, and the process is simple and controllable, making it suitable for high-grade roads and heavy-duty traffic pavements.

This invention relates to the field of lead-acid battery manufacturing technology, and discloses a deep-discharge long-life auxiliary battery, its manufacturing method, and its application. The deep-discharge long-life auxiliary battery includes lead-calcium-tin-aluminum alloy grid positive and negative electrode plates manufactured using a mesh-stretching process, with an facing area of ​​100 cm² between adjacent positive and negative electrode plates. 2 Up to 180cm 2 The positive electrode plate is completely encapsulated by a polyethylene bag-type separator, with the separator ribs facing the positive electrode. The total thickness is 0.54-1.2 mm, and the substrate thickness is 0.15-0.30 mm. The electrolyte is dilute sulfuric acid with a specific gravity of 1.27-1.32 g / ml, containing 0.25-1.50 wt% sodium sulfate. This battery significantly outperforms traditional flooded batteries in deep discharge cycle life, over-discharge recovery capability, and low-temperature start-up performance. It is suitable for low-voltage power systems in new energy vehicles, offering low cost, good compatibility, and excellent overall performance and market competitiveness.

The utility model discloses a cold region tunnel lining falling block rapid reinforcing structure based on a cement-based tough material, which relates to the technical field of tunnel reinforcement, and comprises an existing tunnel lining structure, the inner side surface of the existing tunnel lining structure forms a reinforcing base surface after being cleaned, and the inner side of the existing tunnel lining structure is provided with a cement-based tough material section steel molded sleeve lining. A tunnel existing cable trough is formed in the side face of the tunnel pavement, the cement-based tough material profile steel molded sleeve lining comprises H-shaped steel arch frames arranged in the circumferential direction of the tunnel at the interval of 1 m, and a double-layer reinforcing mesh is arranged on the inner side of each H-shaped steel arch frame. Specifically, a steel formwork is fixed outside profile steel in a welding or bolted connection mode, the problems of uneconomy and low construction efficiency caused by a secondary lining pouring trolley and a full framing formwork are solved, and meanwhile the problem of formwork deformation possibly caused by small rigidity of a simple steel pipe framing formwork is solved.

The present application relates to the technical field of lubricating grease, in particular to a kind of electrically conductive bearing grease composition and preparation method thereof.The electrically conductive bearing grease composition includes base oil, thickening agent and additive;Wherein, the base oil includes mineral oil and synthetic oil, the thickening agent is composite lithium-calcium soap base thickening agent, and the additive includes mass ratio of 5~20:1~6:1~2:0.1~1.5 electrically conductive material, antioxidant and rust inhibitor.The electrically conductive bearing grease provided by the present application has good extreme pressure and abrasion resistance and low friction coefficient, and the product has good electrically conductive performance, can prevent the electric erosion of shaft current to bearing, provides more reliable and comprehensive protection to use site, meets the bearing lubrication requirement in motor field.