27results about How to "Reduce expansion" patented technology

The invention provides a pole piece of a lithium ion battery and a preparation method of the pole piece, the pole piece of the lithium ion battery comprises a current collector and an active material coated on the current collector, and by arranging the active material and an adhesive, the active material can be conveniently and rapidly fixed when being extruded and arranged on the current collector along an angle; the assembly state of the active material on the current collector is stabilized, the active material is placed in the slit die cavity to be extruded, the active material moves and deforms towards the single side direction, so that the structure becomes long and narrow, and the end part of the long and narrow active material is connected with the current collector to be rolled, so that the tortuosity of the lithium ion battery pole piece is reduced, and the service life of the lithium ion battery pole piece is prolonged. And the migration rate of lithium ions in the pole piece and the embedding rate of the lithium ions in the active material are accelerated, meanwhile, the problem that the pole piece is expanded and increased due to lithium ion embedding in the thickness direction of the pole piece is solved, and the probability of deformation of the lithium ion battery is reduced.

This invention relates to a high-efficiency, high-capacity silicon-carbon composite anode material, its preparation method, and its application. The silicon-carbon composite anode material comprises: a phosphorus-doped silicon-carbon material, and a composite coating layer covering the outer surface of the phosphorus-doped silicon-carbon material. A Si-P-C bond structure exists between the phosphorus-doped silicon-carbon material and the composite coating layer. The phosphorus-doped silicon-carbon material comprises: a porous carbon matrix, and nano-silicon particles and phosphorus elements deposited in the pores of the porous carbon matrix. The composite coating layer comprises: a carbon coating layer, and C-F bonds formed in situ within the carbon coating layer. Applying the silicon-carbon composite anode material provided in this invention to lithium-ion batteries can improve the first-cycle coulombic efficiency and cycle stability of lithium-ion batteries, and reduce the expansion rate.

This invention provides an all-solid-state battery, including a casing and a solid-state battery body disposed inside the casing. The solid-state battery body includes a positive electrode portion, a solid electrolyte layer, and a negative electrode portion stacked sequentially. The solid electrolyte layer includes a first surface and a second surface facing each other. The first surface has a receiving groove, and the second surface has a protrusion. The positive electrode portion includes a positive electrode body and a positive electrode current collector. The positive electrode body is disposed within the receiving groove, and the positive electrode current collector is attached to the first surface of the solid electrolyte layer. The negative electrode portion includes a negative electrode body, a negative electrode current collector, and an elastic buffer layer. The elastic buffer layer has a cavity inside to accommodate the negative electrode body and the negative electrode current collector. An opening is provided on the surface of the elastic buffer layer near the protrusion, and the protrusion seals the opening and abuts against the negative electrode body inside. The all-solid-state battery of this invention has advantages such as high safety and low expansion rate.

This application provides graphite particles, a method for preparing the same, a battery, and an energy storage device. The graphite particles in this application satisfy the relationship: 0.8 ≤ La / Lc ≤ 1.6, where La is the average crystallite length of the graphite particles, and Lc is the average crystallite height of the graphite particles. The graphite particles in this application exhibit high cycle performance.

The present application relates to the field of medical or cosmetic formulations, the field of biopharmaceutical manufacturing technology and the field of preparation manufacturing technology, and in particular to a cosmetic composition, a preparation method and application thereof.The cosmetic composition comprises an active ingredient; the active ingredient comprises a chloranthus specious extract and a rhizoma corydalis extract; and the weight ratio of the chloranthus specious extract and the rhizoma corydalis extract is 0.6:1-1:1.The chloranthus specious extract and the rhizoma corydalis extract in the cosmetic composition provided by the present application are synergistic with each other, and have excellent soothing and repairing effects.

The present invention relates to an electro-discharge machining device, which comprises at least a carrier and an electro-discharge machining unit. The carrier is used to carry at least one workpiece to be machined. The electro-discharge machining unit comprises an electrode, a jig and a power supply unit. When the electro-discharge machining unit performs an electro-discharge machining process on a machining target area of the workpiece to be machined along a machining travel direction, a discharge section of the electrode moves relative to the machining target area of the workpiece to be machined. The present invention can improve the machining process, save the overall machining time and save the time required for replacing the electrode.

The utility model relates to a hydraulic delay eliminating system of a bucket lifting mechanism. The hydraulic control device comprises an electromagnetic valve, a large cavity pressure-limiting valve, a bucket lifting oil way, a bucket descending oil way, a small cavity pressure-limiting valve and a lifting oil cylinder, a lifting oil cylinder large cavity and a lifting oil cylinder small cavity are arranged in the lifting oil cylinder, and the hydraulic control device is structurally characterized by further comprising a throttling hole and a hydraulic control one-way valve, the two ends of the bucket lifting oil way are connected with the electromagnetic valve and the lifting oil cylinder large cavity respectively, and the two ends of the hydraulic control one-way valve are connected with the hydraulic control one-way valve respectively. The two ends of the bucket descending oil way are connected with the electromagnetic valve and a small cavity of the lifting oil cylinder respectively, the bucket descending oil way is connected with the hydraulic control one-way valve, the large cavity pressure limiting valve, the throttling hole and the hydraulic control one-way valve are all arranged on the bucket ascending oil way, the small cavity pressure limiting valve is arranged on the bucket descending oil way, and a first electromagnet and a second electromagnet are arranged on the electromagnetic valve. The bucket ascending oil way and the bucket descending oil way are formed by machining oil pipe materials, and the electromagnetic valve is an O-shaped functional electromagnetic valve.

The embodiment of the invention relates to a silicon-carbon composite negative electrode material as well as a preparation method and application thereof. The silicon-carbon composite negative electrode material comprises porous carbon and doping elements, wherein the silicon-carbon composite negative electrode material is prepared by using a chemical vapor deposition method through temperature control of a deposition rate, porous carbon is used as a framework, and doping elements are distributed in pore channels of the porous carbon in a nano-scale manner; the doping elements comprise C, N, Si and F. The silicon-carbon composite negative electrode material has uniformly distributed C-N bonds, so that nitrogen doping of porous carbon is facilitated, the conductivity of the porous carbon material is improved, uniform deposition of nano silicon can be induced due to the existence of the C-N bonds, Li F can be formed by doping fluorine and lithium, the Li F is an important component of a stable SE I film, continuous generation of the SE I film in the circulation process can be reduced, and the service life of the lithium ion battery is prolonged. And the cycle performance of the lithium ion battery is improved.

The present application relates to a new type of negative electrode material for lithium ion batteries, and particularly relates to a boron-doped porous carbon gas-phase silicon-carbon composite negative electrode material and a preparation method thereof. The boron-doped porous carbon gas-phase silicon-carbon composite negative electrode material is prepared by mixing a resin with a template agent, doping a boron source, adding a spheroidizing agent and an initiator for spheroidization polymerization, removing impurities and drying, and then performing gas-phase etching to form pores. Silicon is deposited in the pores of the porous carbon and a carbon layer is deposited on the surface of the silicon-carbon precursor by twice chemical vapor deposition, so as to obtain the boron-doped porous carbon gas-phase silicon-carbon composite negative electrode material. The boron element is doped to optimize the electronic conductivity, the spheroidized porous carbon structure is improved to improve the lithium ion transmission channel and enhance the substrate stiffness, and the material has excellent performance of high rate, low expansion and long cycle, so as to solve the problems of insufficient rate performance, low substrate strength and blocked lithium ion transmission of the existing gas-phase silicon-carbon composite negative electrode material in the prior art.

The composite-coated conversion positive electrode material comprises a conversion positive electrode base and a composite coating layer coated on the surface of the conversion positive electrode base, the conversion positive electrode base is M x S y , M a O, M b Z, M is at least one of Li, Fe, Cu, Ni, Mn, Co, Mo, Sn, Ti and W, Z is at least one of F, Cl and Br, the values of x, y, a and b vary according to the principle of electrical neutrality; the particle size of the conversion positive electrode base ranges from 30 nm to 25000 nm, the thickness of the composite coating layer accounts for 0.1% to 10% of the particle size of the conversion positive electrode base, the composite coating layer comprises an elastomer material and an electronic conductor material, the breaking elongation of the elastomer material is greater than or equal to 100%, and the tensile strength is greater than or equal to 5 MPa.

The button cell top cover assembly comprises the top cover assembly, the top cover assembly comprises an annular cover plate and a pole column, an annular insulating layer is arranged between the annular cover plate and the pole column, the annular cover plate comprises an inclined cover plate, the inclined cover plate is designed to be inclined downwards, and the annular insulating layer is arranged between the inclined cover plate and the pole column. An inclination angle alpha is formed between the inclined cover plate and the horizontal direction and ranges from 5 degrees to 15 degrees; according to the button cell top cover assembly and the lithium battery provided by the utility model, part or all of the annular cover plate is designed to be inclined downwards, so that expansive force is decomposed and expansive force in the vertical direction is inhibited, thus the reserved space is reduced, and the energy density is improved.

The utility model relates to the technical field of wind power generation, in particular to a wind driven generator maintenance control tower which comprises a control tower body and a protection assembly, the control tower body is composed of a first supporting ring, a second supporting ring, a supporting column and a supporting platform, and the first supporting ring and the second supporting ring are arranged in parallel up and down. The two ends of the multiple supporting columns are connected with the first supporting ring and the second supporting ring correspondingly, the supporting platform is connected to the second supporting ring, an inlet and outlet is formed in the supporting platform and rotationally connected with a cover plate, and the protection assembly is connected to the first supporting ring. According to the utility model, the fan-shaped first protective frame and the fan-shaped second protective frame with the same structure are staggered up and down to form a protective frame with a top view angle at the center of a circle, so that when the protective frame is stored, the first protective frame and the second protective frame are changed from a staggered state to an up-down parallel state when a worker climbs up; and bending and unfolding of the protective net are reduced, and the situation that the protective effect is reduced due to damage to the protective net is prevented.

The application discloses a controllable water-permeable solidified grouting material and a preparation method and application thereof, belongs to the technical field of geotechnical engineering foundation reinforcement and underground cavity filling, and aims to solve the technical problem that existing grouting materials are difficult to keep a certain solidified strength and accurately control the water permeability coefficient according to geological requirements to adapt to different hydrogeological environments. The controllable water-permeable solidified grouting material comprises, in weight parts, 45-55 parts of a main solidified base material, 8-18 parts of a water-permeable control system, and 25-35 parts of deionized water. The water-permeable control system comprises porous volcanic rock powder, lignin fiber and modified bentonite, and the mass ratio of the porous volcanic rock powder, the lignin fiber and the modified bentonite is 50:35:15. The porosity of the porous volcanic rock powder is 45%-55%, the length of the lignin fiber is 3 mm-6 mm, and the expansion rate of the modified bentonite is 150%-280%.

This application provides a negative electrode material comprising a carbon matrix and a silicon material, with at least a portion of the silicon material located within the carbon matrix. Raman spectroscopy was performed on N randomly selected sites on the particles of the negative electrode material, revealing an internal depth of 1342 ± 10 cm⁻¹. ‑1 It has the first characteristic peak at 1595±10 cm. ‑1 It has a second characteristic peak at 480±10 cm. ‑1 It has a third characteristic peak at 517±10 cm. ‑1 The anode material exhibits a fourth characteristic peak. The average value of the peak intensity ratio I1 / I2 of the first and second characteristic peaks measured at N sites is P, and the average value of the peak intensity ratio I3 / I4 of the third and fourth characteristic peaks measured at N sites is S. The anode material satisfies the following conditions: 0.9 < P < 1.2, 1.05 < S < 1.25, N ≥ 10. The anode material provided in this application possesses high capacity, low expansion, and superior first-pass coulombic efficiency.

This invention discloses a preparation method and application for improving the fast-charging performance of graphite composite materials. The preparation method involves mixing a graphite precursor with a catalyst and a conductive liquid, ball milling the mixture, followed by pre-carbonization, low-temperature graphitization, and acid washing to obtain a graphite precursor material. Then, the graphite precursor is mixed with a heteroatom polymer, a phosphorus compound, and an organotitanium compound, and heat-treated to obtain the graphite composite material. The graphite composite material prepared by this invention utilizes a catalyst to enhance the anisotropy of carbon during graphitization, and improves electronic conductivity through the conductive agent doped into the core. The titanium dioxide coating on the composite material's outer shell has the characteristics of large interlayer spacing, low expansion rate, and structural stability, which improves the lithium-ion insertion / extraction rate and rate performance. Since phosphorus itself has high specific capacity and a high voltage plateau, phosphorus doping improves the specific capacity and voltage plateau of the composite material, thus enhancing its fast-charging performance.

The invention provides a silicon-carbon negative electrode material and a preparation method thereof, and relates to the technical field of battery manufacturing. The silicon-carbon negative electrode material comprises porous carbon, nano silicon and a nano carbon layer, at least part of the nano silicon is distributed in pores of the porous carbon; at least part of the surface of the porous carbon is covered by the nanocarbon layer; and the half-peak width FWHM of the diffraction peak of the porous carbon at 16-26 degrees in an X-ray diffraction pattern is less than 12. The high-crystallinity porous carbon carrier with the FWHM smaller than 12 is utilized, the mechanical strength of a framework is remarkably enhanced, the volume expansion of nano silicon can be effectively bound, the structural integrity is maintained, and the expansion rate of the pole piece is reduced by matching with carbon layer coating, so that the cycle life of the battery is greatly prolonged.

This invention belongs to the field of power technology, specifically relating to a method, system, equipment, and medium for regulating the power of electric vehicle charging piles. The method includes the following steps: acquiring historical power grid operation data for each distribution area and establishing an objective function; obtaining a Pareto optimal solution set using a multi-objective optimization method based on particle swarm optimization algorithm according to the objective function; calculating the per-unit voltage values ​​of all distribution network nodes in each time period based on the Pareto optimal solution set; selecting solutions where no voltage crossover occurs at the per-unit voltage values ​​of the distribution network nodes, calculating the corresponding total voltage deviation; selecting the solution with the smallest total voltage deviation as the optimal solution for day-ahead optimization; and controlling the charging and discharging of the charging piles according to the optimal solution for day-ahead optimization. Accuracy is improved by filtering the Pareto solution set obtained from the multi-objective optimization results.

The invention relates to the technical field of petroleum drilling backfill, and particularly discloses a well cementation backfill which comprises an inner core and a water-soluble shell covering the inner core, the inner core comprises quartz sand particles of a cement ash mixture, the mass ratio of the cement ash mixture to the quartz sand particles is 10: 1-20: 1, the water-soluble speed of the water-soluble shell under the normal temperature condition is 4-6 h, and the water-soluble shell is a water-soluble shell. The water-soluble shell is a polyvinyl alcohol fiber coating film or a modified polyvinyl alcohol fiber film. The backfill can be used for filling a well section for well cementation, and is simple to operate, convenient to prepare, good in sealing effect and high in reliability.

The present disclosure relates to the technical field of lithium battery negative electrode material, and particularly relates to a preparation method of a phenolic resin-based spherical porous carbon negative electrode material and application thereof; the preparation method comprises the following steps: phenol, at least one natural polyphenol compound, formaldehyde, at least one biomass-based aromatic aldehyde compound, ammonia water and deionized water are added into a reaction container, stirring is kept, a dispersing agent is added, the temperature is continuously increased and constant-temperature reaction is carried out, then a solidifying agent is added, the temperature is increased and the pH value is adjusted, after constant-temperature solidification reaction, a phenolic resin-based precursor is obtained; finally, high-temperature carbonization is carried out, and a phenolic resin-based spherical porous carbon negative electrode material for lithium batteries with high specific capacity and low expansion rate is obtained.

This disclosure provides a silicon-carbon anode sheet, its preparation method, and a soft-pack lithium battery. The preparation method of the silicon-carbon anode sheet involves: dissolving water-soluble conductive polyaniline in an organic solvent, mixing it with CMC adhesive, and then mixing it with silicon-carbon slurry and a multifunctional organophosphonic acid crosslinking agent (mixing temperature: 15℃-25℃) to obtain an anode slurry; coating the anode slurry onto a negative current collector to obtain a silicon-carbon anode sheet semi-finished product; and sequentially subjecting the silicon-carbon anode sheet semi-finished product to pre-baking (90℃-120℃) and vacuum drying (70℃-90℃, time: 2h-5h) to obtain the silicon-carbon anode sheet. This method, by adding multifunctional organophosphonic acid crosslinking agents and water-soluble conductive polyaniline, facilitates the formation of a three-dimensional conductive suppression network with high conductivity, uniform and continuous conductivity, strong toughness and strong self-healing ability. This enhances the constraint on the negative electrode slurry, reduces the volume expansion rate to <15%, inhibits silicon-carbon cracking, and improves the self-healing ability of the three-dimensional conductive suppression network, thus broadening the application of high-capacity silicon-carbon negative electrode sheets in soft-pack lithium batteries.

This invention provides a method for preparing a quartz crucible with low bubble expansion rate, belonging to the field of quartz crucible production technology. The method includes: S1, pouring quartz sand into a mold and using centrifugal molding to form a crucible bubble layer and a transparent layer, wherein the crucible bubble layer uses coarse-grained quartz sand, and the crucible transparent layer uses fine-grained quartz sand; S2, inserting the formed quartz sand along with the mold into a melting chamber and starting a vacuum pump to evacuate to a predetermined pressure; S3, igniting an arc in the mold, and during the formation of the crucible transparent layer, performing a first stage of high-temperature melting on the quartz sand using a first preset power; S4, in the later stage of melting, performing a second stage of high-temperature melting on the quartz sand using a second preset power, and after the second stage of high-temperature melting, removing the mold to obtain a quartz crucible with low bubble expansion rate. This invention, through the combination of quartz sand particle size matching and melting power adjustment, ultimately prepares a quartz crucible with low bubbles and low bubble expansion rate.

This invention relates to the field of rubber hose technology, and discloses a highly flexible and pressure-resistant rubber hose and its preparation method. The preparation method is as follows: An inner layer compound rubber is fed into an extruder and extruded at 70-90°C to form a tubular inner rubber layer. Then, on the surface of the tubular inner rubber layer, polyester tempered brown filaments are braided into a tubular skeleton using a braiding machine, controlling the braiding density to be 80%-95% and the braiding angle to be 45°-60°. Finally, an outer layer compound rubber is fed into an extruder and extruded at 70-90°C to coat the outside of the skeleton layer, forming an integrated composite hose blank. The blank is then fed into a vulcanizing device, controlling the vulcanizing pressure at 0.8-1.2 MPa, the temperature at 150-170°C, and the holding vulcanization for 25-50 minutes. After vulcanization, it is cooled to obtain a highly flexible and pressure-resistant rubber hose. The highly flexible and pressure-resistant rubber hose prepared by this invention has excellent pressure resistance, flexibility, and aging resistance.

Embodiments of the present application provide a binary translation method, an electronic device, a readable storage medium and a program product. The method is applied to a translator. After translating a client instruction stream into a host instruction stream, a first type of instruction included in the host instruction stream is obtained. The first type of instruction is a stack pointer calculation instruction, and a source operand of the first type of instruction includes a stack pointer register and an immediate number operand. In a case where a number of the first type of instructions is M, the M first type of instructions are combined into N first type of instructions based on the source operand of each of the first type of instructions. The M is a positive integer greater than 1, and the N is a positive integer less than M. In this way, embodiments of the present application can process the host instruction after translation but before execution, combine the M first type of instructions into the N first type of instructions, reduce the number of the first type of instructions after translation, reduce the instruction inflation rate after translation, and thus improve the execution efficiency of the translator.

This invention discloses a silicon-based anode material and its preparation method, belonging to the field of lithium-ion battery material technology. The silicon-based anode material comprises a silicon-based active material, a conductive agent, and a composite binder. The composite binder consists of a main-chain polymer, functional grafted chains, and a crosslinking anchoring agent forming a three-dimensional network structure. One end of the crosslinking anchoring agent is chemically bonded to the surface of the silicon-based active material to form an interface anchoring layer, and the other end is crosslinked with the main-chain polymer to form an elastic network layer. The preparation method includes: graft copolymerization of the main-chain polymer and the functional grafted chains to obtain a graft copolymer; mixing the graft copolymer, crosslinking anchoring agent, silicon-based active material, and conductive agent to prepare an electrode slurry; and forming the interface anchoring layer and the elastic network layer in situ during the coating and drying process. This invention solves the technical problems of large volume change and poor cycle stability of silicon-based anode materials during charge and discharge, and can be used to prepare high-performance lithium-ion batteries.

This invention relates to the field of anode material technology, and more specifically, to an anthracite-based silicon-carbon composite anode material and its preparation method. The composite anode material comprises, by weight percentage, 5%-50% high-purity nano-silicon, 50%-90% anthracite-based carbon material, and 5%-15% carbon coating layer; the composite anode material has a two-layer structure, with an embedded core layer and a coating layer. This invention uses ultra-low ash anthracite as the carbon source, which, compared to the graphite, carbon nanotubes / nanofibers, and graphene commonly used carbon sources in existing silicon-carbon composite anode materials, eliminates the need for high-temperature graphitization or carbonization of the raw coal, significantly reducing energy consumption. Furthermore, the pretreatment of the ultra-low ash anthracite does not require acid washing for deashing, which is beneficial for industrial production. This invention also uses photovoltaic waste silicon as the silicon source, obtaining high-purity nano-silicon after pretreatment, thus reducing the cost of raw material sources.

This application provides a hydraulic clearance adjuster, an engine, and a vehicle. The hydraulic clearance adjuster includes: a housing; at least a portion of a plunger disposed within a first receiving cavity, with an oil drain channel formed between the outer peripheral surface of at least a portion of the plunger and the side wall of the first receiving cavity, and a first working cavity formed between the bottom of the plunger and the bottom of the first receiving cavity, the plunger being movably disposed relative to the housing to change the volume of the first working cavity; a first annular gap formed between the inner ring of a seal and the outer peripheral surface of the plunger, the first annular gap communicating with the first working cavity; a second annular gap formed between the outer ring of the seal and the inner side wall of the housing, the second annular gap communicating with the oil drain channels located on both sides of the seal; and a communicating channel formed on at least one of the seal and the housing, the communicating channel communicating with the oil drain channels located on both sides of the seal. The hydraulic clearance adjuster dynamically adjusts the flow cross-section of the oil drain channel according to the oil pressure, thereby precisely controlling the hydraulic stiffness damping.

The invention relates to the technical field of rubber hoses, and discloses a high-flexibility pressure-resistant rubber hose and a preparation method thereof.The preparation method comprises the following steps that inner-layer rubber compound is put into an extruder and subjected to extrusion molding at the temperature of 70-90 DEG C to form a tubular inner rubber layer, polyester tempered palm fibers are made into a tubular framework on the surface of the tubular inner rubber layer through a braiding machine, and the tubular framework is subjected to extrusion molding at the temperature of 70-90 DEG C; the weaving density is controlled to be 80%-95%, the weaving angle is 45-60 degrees, finally, the outer-layer rubber compound is put into an extruder and extruded at the temperature of 70-90 DEG C to coat the outer side of the framework layer, and a composite hose blank is integrally obtained; feeding the tube blank into vulcanization equipment, controlling the vulcanization pressure to be 0.8-1.2 MPa and the temperature to be 150-170 DEG C, preserving heat and vulcanizing for 25-50 minutes, and cooling after the vulcanization is finished, so as to obtain the high-flexibility pressure-resistant rubber hose. The high-flexibility pressure-resistant rubber hose prepared by the invention has good pressure resistance, flexibility and aging resistance.