191results about How to "Good low temperature characteristics" patented technology

The aluminum electrolytic capacitor consists of anode aluminum foil, electrolyte paper, cathode aluminum foil, and is produced through winding the electrolyte paper into roll core, soaking the roll core inside electrolyte solution, setting the roll core inside aluminum casing and sealing. The present invention features the electrolyte solution comprising main electrolyte 10-30 wt%, solvent 65-89.95 wt%, and additive 0.05-5 wt%; the main electrolyte of ammonium salt compound and with water content of 15-95 %; the organic solvent of alcohol or ether; and the additive of waterproof compound. The electrolyte paper is made of Manila hemp and soaked with the electrolyte solution. The mouth of the aluminum casing is sealed with rubber ring of rubber mixture. The aluminum electrolytic capacitor has electrolyte solution well adsorbed onto the anode aluminum foil and the cathode aluminum foil, no corrosion to leads, high sealing performance and other advantages.

The invention belongs to the field of materials of lithium ion batteries, and particularly relates to a negative electrode of the lithium ion battery and a preparation method thereof. The negative electrode of the lithium ion battery comprises a current collector and negative electrode paste for coating the current collector, wherein the negative electrode paste comprises the following dry ingredients by weight percent: 92-99% of active material and 1-8% of an adhesive; the active material is graphite or graphite alloy; the adhesive is waterborne multi-component copolymerization emulsion. The waterborne multi-component copolymerization emulsion is used for replacing conventional butadiene styrene rubber and serves as the adhesive for the lithium ion battery, so that the more excellent adhesive performance is realized in comparison with the adhesive performance of a conventional adhesive, and meanwhile, the prepared battery has prominently excellent performances such as good low temperature characteristics, low circulation expansion rate, good long cycling performance and relatively excellent processing characteristics; the negative electrode prepared by using the method has relatively small impedance and relatively good dynamic performance and is capable of effectively solving the problem of risk of separation of lithium in the lithium ion battery at low temperature; the prepared battery has the characteristics of safety, reliability and long cycle life.

The invention provides a solar module which is composed of a surface sealing film, a transparent adhesive film, a solar cell, a lightweight adhesive film A and an isolated substrate which are stacked from the top to the bottom in order; and the isolated substrate is composed of an isolated film, a carbon-fiber sheet, a lightweight adhesive film B, a honeycomb core, a lightweight adhesive film C and the carbon-fiber sheet which are stacked from the top to the bottom in order, wherein the honeycomb core inside also needs to be appropriately added embedded parts according to concrete operating requirements. The technical scheme of a preparation method of the solar module comprises following steps: (1) making use of an oven to match with a vacuum air pump to process a pre-compacting treatment for a carbon-fiber prepreg; (2) meanwhile, processing a welding sequence of the solar cell; (3) processing a cutting sequence; (4) processing a laminating technology treatment; (5) processing post treatment procedures which in order are: removing raw edges, embedding strakes, arranging a junction box, measuring high voltage, cleaning the surface, measuring photo-electrical output characteristics, classifying components, and examining the appearance. The solar module has the advantages of lightweight, high efficiency and good low-temperature characteristics, and being very suitable to being applied in the stratosphere.

Provided are a nonaqueous electrolyte for a secondary cell, and a secondary cell, which are free from erosion of electrodes or generation of carbon dioxide gas and which have a long-term nonflammability, an excellent low-temperature characteristic and a practically sufficient conductivity.

A nonaqueous electrolyte for a secondary cell, which comprises a lithium salt, a specific hydrofluoroether and a specific glyme type solvent. A secondary cell comprising such a nonaqueous electrolyte for a secondary cell, a negative electrode made of a material capable of storing or discharging lithium ions electrochemically, or metal lithium or a lithium alloy, and a positive electrode made of a material capable of storing or discharging lithium ions electrochemically.

Provided are an LNG storage container with an inner shell, which is capable of efficiently storing LNG or pressurized LNG (PLNG) pressurized at a predetermined pressure and supplying the LNG or PLNG to a consumption place, and capable of reducing manufacturing costs by minimizing the use of a metal having excellent low temperature characteristic, and a method for manufacturing the same. The LNG storage container includes: an inner shell configured to store LNG inside; an outer shell configured to enclose the outside of the inner shell such that a space is formed between the inner shell and the outer shell; a support installed in the space between the inner shell and the outer shell to support the inner shell and the outer shell; and a heat insulation layer part installed in the space between the inner shell and the outer shell and configured to reduce a heat transfer.

The purpose of this invention is to provide an electrolyte capable of suppressing decomposition of a solvent on he negative pole, suppressing energy reduction, gas and load charcteristic going worse to provide a nonaqueous electrolyte providing excellent load property and low temperature property to the battery, and provide a secondary battery containing the electrolyte and additives for it characterizing in containing unsaturated sultone nonaqueous electrolyte and secondary battery using this electrolyte and its additives composed of same compositions.

There is provided an electrolytic solution comprising a chain carbonate (I) represented by the formula (I):

wherein Rf is a fluorine-containing ether group (Ia) having, at its end, a moiety represented by the formula: HCFX (X is H or F); R is an alkyl group in which hydrogen atom may be substituted with halogen atom and hetero atom may be contained in its chain, and an electrolyte salt (II), and the electrolytic solution is excellent in flame retardance, low temperature characteristics, withstand voltage and compatibility with a hydrocarbon solvent and is high in solubility of an electrolyte salt.

The invention relates to a low-temperature electrolyte for LiFePO4 (lithium iron phosphate) lithium-ion batteries, belonging to the technical field of low-temperature electrolytes for lithium batteries. The electrolyte comprises dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, ethylene carbonate, a film-forming additive and lithium polyoxometallate, wherein the lithium polyoxometallate refers to lithium phosphomolybdate Li3PMo12O40, lithium phosphotungstate Li3PW12O40, lithium silicotungstate Li4SiW12O40 or lithium silicomolybdenate Li4SiMo12O40. For solving the problems that in the prior art, the lithium ion transport of an electrolyte is blocked, slow in speed and low in efficiency and the electrolyte is poor in low-temperature performance, the invention provides a novel fluoride-free low-temperature electrolyte for LiFePO4 lithium-ion batteries; and by taking the non-fluoride lithium polyoxometallate with a three-dimensional skeleton structure as an electrolytic lithium salt and selectively adopting a low-viscosity carbonate solvent, through optimized proportioning, the migration rate of lithium ions is increased, and the low temperature properties of LiFePO4 batteries can be significantly improved.

It is an object of the present invention to provide a similar composition metal type welding solid wire capable of forming a welded joint having excellent cryogenic characteristics, such as ensuring a low-temperature toughness equivalent to that of the cryogenic base metal, and in addition, further having a high crack initiation resistance, and a weld metal thereof. The welding solid wire of the present invention is an iron base welding solid wire including carbon: 0.10 mass % or less (not inclusive of 0%), silicon: 0.15 mass % or less (not inclusive of 0%), nickel: 8.0 to 15.0 mass %, manganese: 0.10 to 0.80 mass %, and Al: 0.1 mass % or less (not inclusive of 0%), and oxygen in an amount of 150 ppm or less (inclusive of 0), characterized by including: a REM: 0.005 to 0.040 mass %, or chromium: 4.0 mass % or less (not inclusive of 0%).

The invention discloses a novel environmental protection TPU advertising cloth, which comprises a base cloth and TPU films at two sides of the base cloth. The TPU film comprises the following components in parts by weight: 50-65% of thermoplastic polyurethane, 5-10% of aliphatic diisocyanate, 10-20% of carboxymethylcellulose sodium, 5-10% of anatase-type nano titanium dioxide, 3-8% of a modified ultraviolet ray absorber, 2-5% of a butyl reclaimed rubber, 1-4% of paraffin oil, 0.5-1.2% of a flatting agent, and the balance of an environment-friendly solvent. The employed TPU material has the advantages of no odour, easy processing, and low cost, and is 100 percent recyclable, can substitute PVC, and can effectively improve the yellowing problem of the advertising cloth due to long-term irradiation; the employed modified ultraviolet ray absorber makes the ultraviolet ray transmittance being 5%, the used butyl reclaimed rubber has the efficacy for preventing shock and reducing noise, and is obtained by processing and refining the waste and old butyl rubber, the waste is used, and the used butyl reclaimed rubber has the advantages of economic performance and environmental protection; the polyester filament gridding cloth and a TPU film solution enable on-line applying through a lamination machine, and no glue is added.

Provided are an electrolyte for a lithium secondary battery, and a lithium secondary battery containing the same, wherein the electrolyte for a secondary battery has significantly excellent high-temperature stability, low-temperature discharge capacity, and life cycle characteristics. The electrolyte for the lithium secondary battery comprises a lithium salt; a non-aqueous organic solvent; and a boron derivative represented by the following chemical formula 1. In the chemical formula 1, R1 to R4 are each independently (C1-C10)alkyl, (C6-C12)aryl or (C6-C12)ar(C1-C10)alkyl, and alkyl, aryl, and aralkyl of R1 and R2 may be further substituted with at least one substituent selected from the group consisting of cyano, hydroxyl, halogen, (C1-C10)alkyl and (C6-C12)aryl.

Disclosed is a nonaqueous electrolyte which is capable of satisfactorily suppressing gas generation in a nonaqueous electrolyte secondary battery when the battery is stored in a high temperature environment or during the charge/discharge cycles. The nonaqueous electrolyte contains a nonaqueous solvent and a solute dissolved in the nonaqueous solvent. The nonaqueous solvent contains ethylene carbonate, propylene carbonate, diethyl carbonate and an additive. The additive contains a sartone compound and a cyclic carbonate having a C=C unsaturated bond. The weight ratio of the propylene carbonate (WPC) in the total of the ethylene carbonate, propylene carbonate and diethyl carbonate is 30-60% by weight. The ratio of the weight ratio of the propylene carbonate (WPC) to the weight ratio of the ethylene carbonate (WEC) in the total of the ethylene carbonate, propylene carbonate and diethyl carbonate, namely WPC/WEC satisfies the following relation: 2.25 <= WPC/WEC <= 6. The weight ratio of the cyclic carbonate having a C=C unsaturated bond (WC) to the weight ratio of the sartone compound (WSL), namely WC/WSL satisfies the following relation: 0.5 <= WC/WSL <= 3.

The invention discloses a battery and a cathode composition thereof. The composition comprises the following components in percentage by weight: 80.8-82.6 percent of lead powder, 0.13-0.17 percent of carbon black, 0.06-0.1 percent of sodium lignosulfonate, 0.39-0.43 percent of humic acid, 0.1-0.13 percent of oxygen resistant agent, 0.32-0.5 percent of barium sulfate, 0.03-0.05 percent of short fiber, 7.1-8.0 percent of sulfuric acid and 8.9-9.9 percent of pure water. In the invention, the battery has high over-charge and over-discharge resistance and prolonged service life, and reserves simultaneously the advantages of high capacity, good large-current discharge performance, good low-temperature characteristic, and the like.

The invention relates to a lubricating oil additive, a preparation method thereof and lubricating oil containing the same. The lubricating oil additive has an acrylic acid series segmented copolymer structure and also has a general formula comprising at least one of (A-B)a, (A-B)b-A or (B-A)c-B, wherein A stands for a copolymer block consisting of (methyl) acrylic acid alkyl ester with alkyl with 1-3 carbon atoms; and B stands for a copolymer block consisting of (methyl) acrylic acid alkyl ester with alkyl with 4-30 carbon atoms, and the mass ratio of A to B is 1/99-40/60. Compared with the traditional acrylic acid series lubricating oil additive, the lubricating oil additive provided by the invention has good tackifying effect and can ensure that the viscosity index of the lubricating oil can be greatly improved with less addition amount, the low-temperature characteristics, the flowing characteristics and the shearing stability can be improved, the service life of the lubricating oil can be prolonged, energy resources can be saved, and the load on global environment is reduced.

Disclosed is a surface-treated silica whose surface is treated in advance with at least one silane coupling agent X represented by the following formula (I): (wherein Y independently represents a methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy or acetoxy group; R represents a C1-C18 hydrocarbon group selected from a straight chain, cyclic or branched alkyl groups, alkenyl groups, aryl groups and aralkyl groups). Also disclosed is a rubber composition comprising such a surface-treated silica and 100 parts by weight of a rubber component containing at least one diene rubber.

The invention provides a liquid crystal display device (LCD), which is an active matrix addressing LCD, prepared by instillation and substrate assembly method, capable of preventing generation of falling trace and having excellent residual image characteristics. The dielectric constant is regulated by adding acid compounds (such as amphyl 412) into the liquid crystal compound so as to improve the residual image characteristic of pattern. The compound (such as alkoxyl compound 413) capable of forming hydrogen bond with acid compound is added to the liquid crystal compound in order to prevent hydrogen bond from being generated by acid compound and water 409 when the LG compound falls on the substrate, and thereby avoiding the generation of falling trace. In a successive mode, the content of phenolic compound is 0.00010N above; and the content of the alkoxyl compound is below 0.265 mol/l and 10 equivalent weight above with respect to the phenolic compound. In an interlaced mode, the content of the phenolic compound is 0.00100N above; and the content of the alkoxyl compound is 1.324 mol/l and 150 equivalent weight above with respect to the phenolic compound.

A lithium secondary battery obtained by the present invention has a negative electrode sheet 20 in which the theoretical capacities of the negative active material per unit area are equalized in a negative active material layer 24b on the outer circumference side and a negative active material layer 24a on the inner circumference side of a negative electrode collector 22, and at least one of the following conditions is met with respect to at least part of a bent section 85, which is bent toward the inside of a wound electrode body 80: (1) the percentage content of binder of the outer negative active material layer 24b is smaller than the percentage content of binder of the inner negative active material layer 24a; and (2) the density of the outer negative active material layer 24b is smaller than the density of the inner negative active material layer 24a.