51results about How to "Both high and low temperature" patented technology

The invention relates to the field of rubber, in particular to a fluororubber compound. The fluororubber compound is prepared from the following raw material components in parts by weight: 100 parts of raw fluororubber, 15 to 30 parts of carbon black filler, 10 to 20 parts of modified silica filler and 2.3 to 4 parts of vulcanizing agent, wherein the fluororubber is a mixture of ternary raw rubberand binary raw rubber; the ternary raw rubber is vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene or vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene-csm; the binary raw rubberis vinylidene fluoride-hexafluoropropylene or vinylidene fluoride-hexafluoropropylene-csm. The compound has wider temperature tolerant range and good tolerance to novel fuel or additive, and can be widely applied to sealing products for automobiles, spaceflight, chemical machines and the like.

The invention discloses a graphite negative electrode material, a lithium ion battery, a preparation method and application. The preparation method of the material comprises the steps of (1) crushingand shaping an artificial graphite raw material to prepare powder; 2, graphitizing the powder to obtain a material A; 3, screening the material A to obtain a material B; (4) carrying out surface coating modification treatment on a mixture of the material B and a binder to obtain a material C; and (5) carbonizing the material C to obtain the product. The graphite negative electrode material disclosed by the invention has relatively high tap density and relatively high battery capacity, various characteristics interact with one another, the comprehensive advantages of the material are improved,the characteristics of high capacity and high compaction are ensured, and the high-rate performance of the material is improved; and the preparation method facilitates improvement of the low-temperature electrical performance of the graphite negative electrode material of the lithium ion battery, and is simple in process, low in production cost and suitable for industrial production.

The invention relates to a chlorine-doped modified lithium ion battery lithium-rich cathode material and a preparation method thereof and belongs to the field of lithium ion batteries. The cathode material is Li[Li0.2Ni(0.2-0.5b+0.5a)CobMn(0.6-0.5b-0.5a)]O(2-a)Cl(a), wherein a is more than 0 and not more than 0.1, and b is not less than 0 and not more than 0.13; and lithium salt, nickel salt, manganese salt, cobalt salt, lithium chloride and a combustion improver are ground into fine powder, a solvent is added and then uniformly mixed, and the lithium ion battery lithium-rich cathode material is obtained by firing. The lithium ion battery lithium-rich cathode material is high in discharge specific capacity, high in cycle stability, high in magnification performance and compatible in high-temperature performance and low-temperature performance, and can meet requirements of a power battery. The chloride salt for doping is rich in source, low in cost, environment-friendly, simple and practicable in synthesis process, low in manufacturing cost, convenient for large-scale industrial production and high in practicability.

The invention belongs to the technical field of lithium batteries, and relates to an electrolyte additive of a silicon-carbon anode lithium ion battery, an electrolyte and the silicon-carbon anode lithium ion battery. The electrolyte additive is characterized in that the electrolyte additive comprises a fluorine-containing silane-based sulfimide compound and fluoroethylene carbonate, and the fluorine-containing silane-based sulfimide compound is a fluorine-containing silane-based sulfimide compound. The structural formula of the fluorine-containing silyl sulfimide compound is shown as a general formula I), and R1, R2 and R3 are independently selected from C1-C6 alkyl; and R4 and R5 are each independently selected from any one of fluorine, an alkyl group, an alkoxy group, and a fluorine-substituted C1C12 linear or branched alkyl group, and R4 and/or R5 is a fluorine atom or a fluorine-substituted C1-C12 linear or branched alkyl group. The electrolyte additive provided by the invention can effectively improve the cycle performance, the rate capability, the storage performance and other electrochemical properties of the lithium ion battery under high-temperature and low-temperature conditions.

The invention relates to a positive electrode material, a positive electrode pole piece prepared from the positive electrode material and an obtained lithium ion battery. The positive electrode material comprises a positive electrode active material, modified superconducting carbon black and carbon nanotubes. The modified superconductive carbon black and the carbon nanotubes are used as a conductive agent together to prepare the positive electrode material, so that the conductivity of the positive electrode material is improved, rapid intercalation and deintercalation of lithium ions under thecondition of high-rate charge and discharge are facilitated, the cycle performance of the battery is improved, and the rapid and long-acting use characteristic of the lithium ion battery is realized.The lithium ion battery assembled by the positive electrode material has good energy density, cycle performance, rapid charging performance and relatively long service life.

The invention discloses a lithium iron phosphate power battery and a preparation method thereof. Secondary particle lithium iron phosphate, which is agglomerated by primary nano particles and has the D50 value of 1-3 mu m, is taken as a positive active material; a negative electrode utilizes high-interlayer-spacing synthetic graphite with an amorphous carbon coating structure; a diaphragm utilizes a high-air-permeability diaphragm with PP, PE and PP as a base material, and the air permeability is not greater than 300 s/100 ml; an electrolyte liquid comprises the following ingredients: 25-35% ethylene carbonate (EC), 5-10% propylene carbonate (PC), 25-35% ethyl methyl carbonate (EMC) and 10-15% diethyl carbonate (DEC); lithium salt is a composite conductive salt of lithium hexafluorophosphate and lithium difluoroborate, and the concentration of the lithium salt is 10-15%; and the additive comprises butanedinitrile, ethylene sulfite and fluorinated hydrocarbon. Square aluminum shell lithium-ion battery positive and negative electrode plates are subjected to treatment of winding, core-winding, cover plate welding, shelling, baking, laser welding, secondary baking, injecting, forming, air exhausting, steel ball pressing, volume dividing and 45-75 DEG C high-temperature aging for 120-24 hours at a high temperature to form the film.

The invention discloses a warm mix polymer modified asphalt mixture and a preparation method thereof, wherein the mixture comprises 4.0-6.0 parts of a warm mix polymer modified asphalt, 1.0-3.0 parts of ore powder, and 91.0-95.0 parts of an aggregate, the warm mix polymer modified asphalt comprises 1-7 parts of a warm mix agent, 2-5 parts of a polymer, 88-97 parts of matrix asphalt, and sulfur, and the sulfur accounts for 0.01-0.07% of the total mass of the warm mix agent, the polymer and the matrix asphalt. The warm mix agent preparation method comprises: under the effect of a catalyst, carrying out a reaction on a macromolecule alkane and a halogen to obtain an intermediate; obtaining an aromatic hydrocarbon complexing component from aromatic hydrocarbon oil and a complexing compound under the effect of a catalyst; and introducing the aromatic hydrocarbon complexing component into the intermediate, carrying out a reaction, and aging to obtain the warm mix agent. According to the present invention, by adding the warm mix agent to the asphalt in the mixture, the warm mix effect is provided for the asphalt, the high temperature performance and the low temperature performance of the asphalt are considered, the thermal stability of the asphalt is improved, the aging resistance is improved, the thermal aging of the asphalt is reduced, and the harmful gas generation is reduced.

The invention provides a pole piece with a novel conductive agent distribution structure and a lithium ion battery comprising the pole piece. The pole piece comprises a current collector and coatingsarranged at the two sides of the current collector, and each coating comprises an active substance, a conductive agent and a binder. In the thickness direction of the coating, the coating comprises ahigh-conductivity agent region and a low-conductivity agent region, by changing the distribution of the conductive agent in the thickness direction of the pole piece coating, the conductive networks with different densities are constructed, and it is tested that the more sufficient conductive network with higher density is constructed in an area with high polarization degree, the content of the conductive agent is reduced in an area with low polarization degree, and a conductive network with lower density is constructed. In other words, different formulas can be designed according to the performance requirements of customers at the high-temperature and low-temperature aspects of the battery cell, and are matched to enter a chemical system at the same time, so that the goals of high-temperature and low-temperature performance consideration, high energy density consideration and quick charging performance consideration are achieved.

A lithium ion battery module for an electric forklift truck, and a power supply box, which belong to the technical field of lithium ion batteries. The battery module comprises a housing and a batterypack in the housing; the battery pack comprises cells (11), an inter-cell heat insulation sheet (12), and a bottom surface insulating plate (13), a side surface insulating plate (15) and an end surface insulating plate (14) which are at the periphery of the cells (11), and a bus bar support (7) at the top; the cells (11) are square lithium iron phosphate batteries, and are grouped in a mode with each parallel branch having eight cells which are connected in series, a protruding spacer (18) is provided on the surface of the side surface insulating plate (15) and the surface of the bottom surface insulating plate (13), and the bus bar support (7) is provided with an inter-cell (11) connection bar (4) and an end connection bar (6). The power supply box comprises a box body (34), the box body(34) is internally provided with a high-voltage box (35), a BMS and the described lithium ion battery module for an electric forklift truck, a box cover (39) is provided on the box body (34), and an exhaust valve (50) is provided on the box cover (39). The lithium ion battery module and the power supply box both have high reliability in terms of structure and thermal performance.

The invention discloses a warm mix hard asphalt mixture and a preparation method thereof, wherein the warm mix hard asphalt mixture comprises 4.0-6.0 parts of a warm mix hard asphalt, 1.0-3.0 parts of ore powder, and 91.0-95.0 parts of an aggregate, and the warm mix hard asphalt comprises 0.5-7 parts of a warm mix agent and 93-99.5 parts of matrix asphalt. The warm mix agent preparation method comprises: under the effect of a catalyst, carrying out a reaction on a macromolecule alkane and an elemental halogen to obtain an intermediate; carrying out a reaction on an aromatic hydrocarbon oil and a complexing compound under the effect of a catalyst to obtain an aromatic hydrocarbon complexing component; and carrying out a reaction on the aromatic hydrocarbon complexing component and the intermediate at a certain temperature, and aging to obtain the warm mix agent. According to the present invention, the warm mix hard asphalt used in the warm mix hard asphalt mixture contains the warm mix agent, such that the warm mix effect can be provided, the high temperature performance and the low temperature performance of the asphalt are considered, the harmful gas generation is reduced, the adhesion of the asphalt is improved, the thermal stability of the asphalt is improved, and the aging resistance is improved.

The invention discloses a warm mix polymer modified asphalt mixture and a preparation method thereof, wherein the mixture comprises 4.0-6.0 parts of a warm mix polymer modified asphalt, 1.0-3.0 parts of ore powder, and 91.0-95.0 parts of an aggregate, the warm mix polymer modified asphalt comprises 1-7 parts of a warm mix agent, 2-5 parts of a polymer, 88-97 parts of matrix asphalt, and sulfur, and the sulfur accounts for 0.01-0.07% of the total mass of the warm mix agent, the polymer and the matrix asphalt. The warm mix agent preparation method comprises: under the effect of a catalyst, carrying out a reaction on a macromolecule alkane and a halogen to obtain an intermediate; uniformly mixing aromatic hydrocarbon oil and a complexing compound to obtain an aromatic hydrocarbon complexing component; and carrying out a reaction on the aromatic hydrocarbon complexing component and the intermediate at a certain temperature to obtain the warm mix agent. According to the present invention, by adding the warm mix agent to the asphalt in the mixture, the warm mix effect is provided for the asphalt, the high temperature performance and the low temperature performance of the asphalt are considered, the thermal stability of the asphalt is improved, the aging resistance is improved, the thermal aging of the asphalt is reduced, and the harmful gas generation is reduced.

The invention discloses a non-aqueous electrolyte and a lithium ion battery comprising the non-aqueous electrolyte. The mass percentage content of PS in the electrolyte is Bwt%, the mass percentage content of 1, 3-propene sultone (PST for short) is Cwt%, and the mass percentage content of PS in a conventional electrolyte is Awt%. According to the invention, a certain proportion of PST with a similar high-temperature effect to PS is compounded into the electrolyte, based on relatively large impedance of PST, when the contents of PS and PST meet the relational expression: 0.17 < = C/(A-B) < = 0.38; through the synergistic effect of PS and PST, the electrolyte with the PS content meeting the control requirement of European Union Chemical Administration (ECHA) on SVHC candidate substances of less than 0.1% can be prepared, and the high-temperature performance and the low-temperature performance of the battery can be ensured; moreover, the electrical performance of the lithium battery containing the low-content PS electrolyte is equivalent to the performance of the battery containing the conventional content PS.

The invention discloses a warm-mixing epoxy asphalt mixture and a preparation method thereof. The warm-mixing epoxy asphalt mixture comprises the following components by weight percentage: 4.0-6.0% of warm-mixing epoxy asphalt, 1.0-3.0% of ore powder, and 91.0-95% of an aggregate; wherein, the warm-mixing epoxy asphalt mixture comprises a component A, a component B, and a component C, wherein the component A is warm-mixing asphalt, the warm-mixing asphalt comprises a warm-mixing agent and a matrix asphalt; the component B is an epoxy resin composition; and the component C is a curing agent. The preparation method of the warm-mixing agent comprises the following steps: under the effect of a catalyst, high-molecular alkane is reacted with a halogen simple substance to obtain an intermediate; aromatic hydrocarbons oil and a complex are uniformly mixed to obtain an aromatic hydrocarbons complexation component; the aromatic hydrocarbons complexation component is added in the intermediate, under the catalysis effect of the complexation component, and the aromatic hydrocarbons complexation component and the intermediate are reacted to obtain the warm-mixing agent. The epoxy asphalt mixture has good Marshall stabilization degree, rut resistance and water damage resistance capabilities.

The invention discloses a high and low temperature performance-considered high-voltage electrolyte and a lithium ion battery thereof. The electrolyte comprises electrolyte salt, a non-aqueous organicsolvent and a functional additive, wherein the function additive is cyclo tris-ethylene carbonate. Through adding the function additive, the lithium ion battery electrolyte can generate a layer of compact and uniform protection film on the surface of electrodes in the formation stage, so as to decrease secondary reaction between electrode materials and the electrolyte, make the cycle performance of the battery excellent and give consideration to both the high and low temperature performance.

The invention provides a warm mix hard asphalt, and a preparation method thereof. The warm mix hard asphalt comprises, by mass, 0.5 to 7 parts of a warm mixing agent, and 93 to 99.5 parts of matrix asphalt. The preparation method comprises following steps: under the action of a catalyst, a high-molecular alkane is reacted with a halogen elementary substance at a certain temperature under a certain pressure so as to obtain an intermediate; an aromatic hydrocarbon oil and a complex are uniformly mixed so as to obtain an aromatic hydrocarbon complex compound; the aromatic hydrocarbon complex compound and the intermediate are reacted at a certain temperature so as to obtain the warm mixing agent. The warm mixing agent added in the warm mix hard asphalt is capable of realizing warm mixing of asphalt, giving consideration to the high and low temperature performance of asphalt, increasing thermal stability of asphalt, improving aging resistance, reducing application temperature of asphalt, reducing generation amount of harmful gas, and improving the cohesiveness of asphalt.

The present invention provides a warm mix sulfur asphalt, which comprises, by mass, 0.5-7 parts of a warm mix agent, 33-79.5 parts of a matrix asphalt, and 20-60 parts of sulfur. The warm mix agent preparation method comprises: under the effect of a catalyst, carrying out a reaction on a macromolecule alkane and an elemental halogen at a certain temperature under a certain pressure to obtain an intermediate; carrying out a reaction on an aromatic hydrocarbon oil and a complexing compound under the effect of a catalyst to obtain an aromatic hydrocarbon complexing component; and carrying out a reaction on the aromatic hydrocarbon complexing component and the intermediate at a certain temperature, and aging to obtain the warm mix agent. According to the present invention, with the warm mix agent, the warm mix effect is provided for the asphalt, the high temperature performance and the low temperature performance of the asphalt are considered, the thermal stability of the asphalt is improved, and the aging resistance is improved; and with the application of the warm mix agent and the asphalt to prepare the warm mix asphalt, the melting temperature of the asphalt and the viscosity of the asphalt at the melting temperature are reduced, and especially during the preparation of sulfur asphalt, the preparation temperature of the sulfur asphalt can be reduced, and the harmful gas generation can be reduced.