Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

282results about How to "Long cycle life" patented technology

Rich-lithium ternary laminar lithium ion battery cathode material

The invention discloses a rich-lithium ternary laminar lithium ion battery cathode material, which has a molecular formula of Li<1+alpha> MnxNiyCozO2, wherein alpha is greater than 0.05 but smaller than 0.5, x is greater than 0.5 but smaller than 0.8, y is greater than 0.05 but smaller than 0.2, z is greater than 0.05 but smaller than 0.2, and the sum of x, y and z is 1. According to a method, a sol-gel method is adopted for preparing the cathode material. The method comprises the following preparation processes that metal salts of soluble manganese sources, nickel sources, cobalt sources and lithium sources are dissolved in water, then, acid complexing agents are added, ammonia water is used for regulating the pH value to be 6 to 8, next, the stirring is carried out at 60 to 90 DEG C, in addition, the water is dried through evaporation, sol-gel precursors are obtained, blocky porous loose precursors are obtained through vacuum drying, then, the ball milling, the pre-sintering, the sintering and the ball milling are carried out, and finally, the cathode material is obtained. The obtained material has the advantages that particles are more uniform and are in the nanometer level, in addition, a battery is assembled for carrying out electrochemical test, and higher capacity and excellent circulation performance are realized.
Owner:ZHUZHOU TAIHE HIGH TECH

Dual-power supply management system and dual-power supply management method for electric vehicle

The invention discloses a dual-power supply management system and a dual-power supply management method for an electric vehicle. The dual-power supply management system comprises a storage battery, a power electronic switch, a supercapacitor bank, a bidirectional DC-DC (Direct Current-Direct Current) converter and a digital signal processor, wherein the storage battery is connected to an inverter through the power electronic switch; the power electronic switch controls the charge, discharge and switching on or off of the storage battery under the control of an acquired PWM (Pulse Width Modulation) signal, the supercapacitor bank is connected to the inverter through the bidirectional DC-DC converter; the bidirectional DC-DC inverter is used for increasing or reducing the voltage in a positive direction and a negative position under the control of the acquired PWM signal; and the digital signal processor is connected with the storage battery, the supercapacitor bank, a motor, an accelerator, a brake and direct current buses among the inverter, the power electronic switch and the bidirectional DC-DC inverter to generate a PWM signal for controlling the power electronic switch and the bidirectional DC-DC inverter. According to the dual-power supply management system, the supercapacitor bank and the storage battery are used in parallel, and thus the defects that the storage battery is low in specific power, does not support a large current, and the like are effectively made up.
Owner:SHANGHAI DIANJI UNIV

High-nickel ternary positive electrode material with single crystal morphology and preparation method of high-nickel ternary positive electrode material

The invention discloses a high-nickel ternary positive electrode material with single crystal morphology and a preparation method of the high-nickel ternary positive electrode material. The positive electrode material is formed by a base material and a coating layer, wherein the base material is prepared from a high-nickel ternary precursor, a lithium source and a doping agent; the doping agent comprises a doping element, the doping element is a metal element, the coating layer is formed by a coating material, the coating material comprises a coating element, and the coating element is a metalelement and/or a non-metal element. The positive electrode material is obtained by mixing the high-nickel ternary precursor, the lithium source and the doping agent, performing primary sintering, then mixing with the coating material, and performing secondary sintering. The high-nickel ternary positive electrode material disclosed by the invention has the advantages of single crystal morphology,smooth surface, small specific surface area and high compaction density, and the single crystallization of the high-nickel ternary positive electrode material improves the specific capacity and cycleperformance of the positive electrode material and prolongs the service life of the positive electrode material. The preparation method is simple in process, easy to implement and beneficial to industrial large-scale production.
Owner:TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD

Lithium battery formed on basis of lithium nickel manganese oxide and lithium titanate and preparation method of lithium battery

The invention discloses a lithium battery formed on the basis of lithium nickel manganese oxide and lithium titanate and a preparation method of the lithium battery. The lithium battery comprises an aluminum-plastic film casing, an anode lug, a cathode lug and a tab film, wherein the aluminum-plastic film casing contains a battery cell and electrolyte; the battery cell comprises an anode piece, a diaphragm and a cathode piece; materials of the anode piece comprise an anode slurry coating consisting of a positive active material, a binding agent, a conductive agent and a solvent and an anode current collector; the positive active material adopts an Al2O3 coating of lithium nickel manganese oxide; the binding agent adopts one or two of polyvinylidene fluoride and polytetrafluoroethylene; the conductive agent adopts one or more of conductive carbon black, conductive graphite and carbon nanotubes; the solvent adopts N-methyl-2-pyrrolidinone; the anode current collector adopts an aluminum foil; the cathode piece adopts an aqueous cathode or an oil-based cathode. According to the designed lithium battery, the purposes of improvement of the reversible specific capacity, the energy density and the rapid charge-discharge capability, the cycle performance and the safety performance of the battery are achieved while the production cost is reduced.
Owner:四川省有色冶金研究院有限公司

High-temperature-resisting lithium-ion battery membrane with plurality of types of coatings and preparation method of high-temperature-resisting lithium-ion battery membrane

The invention provides a high-temperature-resisting lithium-ion battery membrane with a plurality of types of coatings and belongs to the technical field of battery membranes. The high-temperature-resisting lithium-ion battery membrane is prepared from a coating membrane composed of a battery membrane with one surface or double surfaces coated with coating slurry; one surface or double surfaces of the coating membrane are coated with slurry additional layers; each slurry additional layer comprises at least one layer of coating composed of the coating slurry. The invention further provides a preparation method of the high-temperature-resisting lithium-ion battery membrane with the plurality of types of coatings; the battery membrane has the advantages that a coating membrane has relatively high safety on a battery; meanwhile, the battery membrane can also be used for resisting high temperature, reducing the shrinkage rate of the membrane under a high-temperature condition and prolonging the service life of the battery; the high-temperature-resisting lithium-ion battery membrane can be used for improving the affinity of the membrane and electrolyte and can guarantee that the membrane is sufficiently swollen through the electrolyte and the service life of the battery is prolonged.
Owner:HEBEI GELLEC NEW ENERGY MATERIAL SCI&TECHNOLOY CO LTD

Power grid control method based on battery service life model

The invention relates to micro-power grid control method in the power system field, in particular to a power grid control method based on a battery service life model. The method comprises the steps of (1) building a battery service life model; (2) judging whether battery operation parameters are out-of-limit; (3) judging whether a micro-power grid is restrained by self-balancing degree and self-smoothing degree; (4) controlling the micro-power grid restrained by the self-balancing degree and the self-smoothing degree; (5) controlling the micro-power grid restrained by the self-balancing degree and the self-smoothing degree; and (6) adjusting battery operation parameters when the battery operation parameters are out-of-limit. According to the method disclosed by the invention, the optimization combination control can be carried out according to the operation parameters influencing the circulating service life of a battery, and therefore, the service life of an energy storage battery can be well prolonged while a power distribution grid scheduling command is responded, the investment cost for the service life of the power grid is reduced, and the effective technical support for popularizing the rapid power grid development is provided.
Owner:CHINA ELECTRIC POWER RES INST +1

Composite metal lithium negative electrode, preparation method and metal lithium battery

The invention discloses a composite metal lithium negative electrode, a preparation method and a metal lithium battery. The metal lithium negative electrode is composed of a three-dimensional currentcollector frame and a surface coating layer, wherein the three-dimensional current collector frame is used as a matrix of the composite lithium negative electrode, so volume expansion of lithium metalin the circulation process can be effectively relieved, the average current density can be reduced due to the high specific surface area, uneven deposition of lithium is further inhibited, the metaloxide nano-particle sites in a surface coating layer can form alloy with lithium metal in situ in the circulation process and further serve as reversible lithium deposition sites, polarization of lithium deposition is reduced, and uniform intercalation and deintercalation of lithium can be induced. The metal lithium negative electrode is advantaged in that a method of combining a porous skeleton and a surface lithium-philic modification layer is adopted, so a problem that it is difficult to consider the bulk phase pulverization and uneven interface growth in a lithium metal anode in the priorart is solved, and an effective thought is provided for actual industrialization of a lithium metal negative electrode.
Owner:BEIJING TAIFENG XIANXING NEW ENERGY TECH CO LTD +1

Water-based cutting fluid for metal processing and preparation method of water-based cutting fluid

The invention discloses water-based cutting fluid for metal processing and a preparation method of the water-based cutting fluid. The cutting fluid mainly consists of a lubricating agent, a metal antirust agent, an anti-wear reagent at extreme pressure, a nonionic surfactant, a dispersing agent, an antifoaming agent and water, and the cutting fluid comprises the following components in percentage by weight: 8-12 percent of oleic acid, 1.8-2.5 percent of triethanolamine, 0.3-0.6 percent of boric acid, 0.2-0.5 percent of benzotriazole, 5-8 percent of sodium carbonate, 10-12 percent of polyethylene glycol, 0.2-0.5 percent of dodecylphenol polyoxyethylene ether (OP-10), 0.7-1 percent of glycine betaine, 0.5-0.8 percent of glycerin polyoxypropylene ether and the balance of water. According to the water-based cutting fluid disclosed by the invention, the problems that the conventional water-based cutting fluid is poor in antirust and lubricating performances, low in recycling period and harmful to the human and environment are solved, and the aims of improving the lubricating effect and the antirust performance, realizing harmlessness to the environment and a human body and reducing the production cost of metal processing are achieved by virtue of synthesis of polybasic esters.
Owner:中钢集团郑州金属制品研究院股份有限公司

Three-dimensional graphene/ carbon nano tube based molybdenum disulfide/cobaltous sulfide composite material electrocatalyst as well as preparation method and application thereof

The invention belongs to the field of catalytic materials, and particularly relates to a three-dimensional graphene/ carbon nano tube based molybdenum disulfide/cobaltous sulfide composite material electrocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: step I, treating a precursor: performing ultrasonic treatment on a certainamount of oxidized graphene and a modified carbon nano tube, adding ascorbic acid, thiourea and a metal ion precursor to be uniformly mixed, wherein the metal ion precursor is sodium molybdate and cobalt chloride; step II, performing a hydrothermal reaction process: transferring mixed composite into a reaction kettle, heating the composite to a temperature of 160-200 DEG C, reacting for 20-28 hours at the temperature, conducting cooling to the room temperature to obtain a gel-like black substance, and conducting washing and freeze-drying to obtain a cylindrical black solid. A graphene/ carbonnano tube with a three-dimensional network structure provides a quick electron transfer path and an ion transport channel, and molybdenum disulfide/cobaltous sulfide with a nano structure is anchoredon three-dimensional structural carbon to expose more electro-active sites, so that electrochemical hydrogen evolution property is cooperatively improved.
Owner:WENZHOU UNIVERSITY

Energy storage system and energy storage method based on communication base station

The invention discloses an energy storage system and an energy storage method based on a communication base station, relates to the communication field, and can improve the service life of the energy storage system so that operation cost of the communication base station is reduced and investment return rate is improved. The energy storage system comprises a first energy storage unit including a plurality of lithium ion batteries; a second energy storage unit including a plurality of lead-acid batteries; a switch unit including two switch ends and a control end, and a monitoring unit; wherein one switch end of the switch unit is two switch points which are connected with the first energy storage unit and the second energy storage unit respectively, and the other switch end of the switch unit is connected with a power supply system and a base station load of the communication base station; the output end of the monitoring unit and the control end of the switch unit are connected to input control signals, the monitoring unit is used for controlling the switch unit to switch according to whether the monitored power supply system is charged and storage condition of the first energy storage unit, so that charging and power supply of the energy storage system are achieved.
Owner:HUAWEI TECH CO LTD

Thermal spray coatings and applications therefor

This invention relates to coatings for a metal or non-metal substrate comprising (i) a thermal sprayed bondcoat layer applied to said substrate comprising an alloy of MCrAlM′ wherein M is an element selected from nickel, cobalt, iron and mixtures thereof, and M′ is an element selected from yttrium, zirconium, hafnium, ytterbium and mixtures thereof, and wherein M comprises from about 35 to about 80 weight percent of said alloy, Cr comprises from about 15 to about 45 weight percent of said alloy, Al comprises from about 5 to about 30 weight percent of said alloy, and M′ comprises from about 0.01 to about 1.0 weight percent of said alloy, said alloy thermally sprayed from a powder having a mean particle size of 50 percentile point in distribution of from about 5 microns to about 100 microns, said bondcoat having a surface roughness of at least 200 micro-inches, and said bondcoat having a thermal expansion of about 6.5 millimeters per meter or less between a temperature of from about 25° C. to about 525° C., and (ii) a thermal sprayed ceramic layer applied to said bondcoat layer; wherein said coating has a helium leak rate of less than 6×10−6 standard cubic centimeters per second. The coatings are useful for extending the service life under severe conditions, such as those associated with metallurgical vessels' lances, nozzles and tuyeres.
Owner:PRAXAIR ST TECH INC

Self-lifting method for large scale steel structure supporting platform in limited space

The invention discloses a self-lifting method for a large scale steel structure supporting platform in a limited space, and the method bases on a self-lifting steel structure supporting platform. The self-lifting steel structure supporting platform comprises a sliding orbit composed of two joist steels or steel rail which are arranged in parallel and a plurality of self-lifting steel structure sliding measure supports arranged on the sliding orbit side by side; each self-lifting steel structure sliding measure support comprises a base, standard mast sections, a platform beam adjusting section and a lifting frame. Operation steps comprise that quantity of needed self-lifting steel structure sliding measure supports is measured, then the sliding orbit and the base are installed, and N of the standard mast sections, the platform beam adjusting section and the lifting frame are installed on each base in sequence. According to the requirement for construction height, a rectangular ring beam is lifted to a pointed elevation position by one of the top lifting frame and is fixed. According to the self-lifting steel structure supporting platform and the self-lifting method, lifting work of a large scale supporting structure can be conducted by fully relying on manpower, mounting and dismounting are convenient, efficiency is high, needed materials are less, cost is low, and cycle use can be achieved.
Owner:CHINA METALLURGICAL CONSTR ENG GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products