52results about How to "Easy to increase capacity" patented technology

The invention provides a network voltage disturbance generating device, which comprises a three-phase bridge type PWM (Pulse Width Modulation) rectifier and a three-H-bridge three-phase four-wire-system PWM inverter, wherein the alternating current side of the rectifier is connected with an electric network through an L type filter; the direct current side of the rectifier is connected in series with the direct current side of the three-H-bridge three-phase four-wire-system PWM inverter; an LC filter is connected to the alternating current side of the three-H-bridge three-phase four-wire-system PWM inverter; the output end of the LC filter is connected with an isolation transformer; and the secondary side of the isolation transformer is connected with a load. The invention further provides a control method suitable for the device. Due to the adoption of the device provided by the invention, the simulation of a network voltage amplitude, frequency disturbance and an electric network harmonic phenomenon can be realized, bilateral flow of energy can be realized, and active energy transmitted by tested solar-powered grid-connected equipment is fed back to the electric network; and the control method is easy and convenient to implement, and a target reference value can be accurately tracked; and moreover, quick response and small steady-state errors are realized, so that electric network disturbance can be simulated accurately.

The invention discloses a control method for a combined refrigerating multi-split air conditioner system. The multi-split air conditioner system is characterized in that two or more outdoor combined refrigerating modules are arranged the outdoor side to form a cold source system of the multi-split air conditioner system, each outdoor combined refrigerating module is composed of a first refrigerant vapor compression and refrigeration circulating loop and a second refrigerant circulating loop, one or more direct evaporation type indoor air cooler modules are arranged at the indoor side, and a refrigerant storing and conveying unit is connected with the part between each outdoor combined refrigerating module and the corresponding indoor air cooler module to form a closed circulating system through a liquid collecting tube, a main liquid supply tube and a main air return tube. According to the control method for the combined refrigerating multi-split air conditioner system, the number of the indoor and outdoor modules is decided according to the designed thermal load of an air conditioner, and the control method precisely regulates the refrigerating capacity to meet the heat control needs of round-the-clock running data machine rooms and electronic equipment; the control method for the combined refrigerating multi-split air conditioner system is capable of making the maximum use of the natural cold source of the day and night, transition season and winter so as to realize the great energy conservation and emission reduction of the air conditioner system.

An auxiliary convertor comprises an inverter and an auxiliary convertor output control device, wherein the inverter converts direct currents into alternating currents, and the auxiliary convertor output control device carries out sampling and processing to output of the inverter and controls the output voltage of the inverter by combining output voltage sampling information of a parallel bus. The auxiliary convertor is suitable for locomotives, motor train units, subways and inter-city trains.

The invention relates to a preparation method of polylactic acid / polyadipic acid-polybutylece terephthalate blend, and belongs to the field of high molecular polymer blending modification. In the method, the injection of a supercritical carbon dioxide fluid can generate synergistic capacity increasing and toughening effects on the PLA / PBAT blend with a chain extender ADR or ADR and organic montmorillonite (OMMT) beside reducing the viscosity of a processed melt, so as to further refine a PBAT dispersion phase and enhance the adhesion of a PLA / PBAT interface layer. Finally, a set of PLA / PBAT modified blends with high toughness is obtained, and the maximum notched impact strength is 36.23 kJ / m2. Under the plasticization of the supercritical carbon dioxide fluid, the selective distribution ofOMMT nanoparticles in the PBAT and PLA interface layers and in-situ generated PLA-ADR-PBAT block macromolecules can stabilize the interface of PBAT dispersion phase; and the synergistic effect enables the dispersion phase to be better refined during the blending process, thereby improving the impact toughness of the blend.

The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a preparation method for a negative electrode material of the lithium-ion battery. The preparation method comprises the steps of ball-milling fine powder of artificial graphite wastes, SiO particles and organic carbon sources, thus acquiring mixed powder; then mixing the mixed powder with nitrogen-containing compounds; and nitriding in the atmosphere of protective gases at high temperatures of 300-1200 DEG C, thus acquiring the negative electrode material of the lithium-ion battery. According to the preparation method provided by the invention, the artificial graphite wastes can be better utilized for recycling, oxygen-containing functional groups on the surfaces of the artificial graphite wastes can be removed by nitrogen treatment, and primary coulombic efficiency, cycling stability and reversible capacity of the artificial graphite wastes can be improved. In addition, due to the mixture of silicon monoxide and the artificial graphite, both advantages can be integrated and both disadvantages can be weakened, and then the negative electrode material of the lithium-ion battery with high coulombic efficiency, good cycling performance, high capacity, high power and relatively small expansion can be acquired for the first time via effective coverage.

The invention belongs to the technical field of the accumulator recycling, and provides a scrap lead accumulator recycling method. The method comprises the following steps: (1) dismantling and sorting the scrap lead accumulator; (2) treating liquid waste acid pickle; (3) treating waste plastic; (4) smelting lead matte; (5) purifying; (6) producing lead alloy; (7) removing dust; (8) water film dust removing: collecting the waste gas in the dust removing step (7) to guide into the water film dust removing system to perform the water film dust removing, wherein the gas after dust removing is discharged into the atmosphere. The scrap lead accumulator recycling method provided by the invention is low in energy consumption, high in yield, and free from causing secondary pollution on the environment.

The invention relates to the technical field of storage batteries, in particular to a novel battery management system for an electric vehicle, including an external power access module, a controllableswitch, a voltage acquisition module, a current acquisition module, a temperature management system, a plurality of sub-energy storage platforms and an MCU, wherein the plurality of sub-energy storage platforms are connected in series to each other to form an energy storage platform; the voltage acquisition module collects the voltage at two ends of the energy storage platform and is connected with the MCU; the current acquisition module collects the current flowing through the energy storage platform and is connected with the MCU; and the temperature management system regulates the temperature of the energy storage platform. The novel battery management system for an electric vehicle has the advantages that the sub-energy storage platforms are arranged to constitute an energy storage platform of the battery, so that the battery can be conveniently expanded or modified into a battery pack of other voltages, the charging voltage of the battery core is monitored and balanced by a balancing module and a sampling module, to prolong the service life of the battery core, and the safety management unit is used for cutting off the power supply in an emergency, thereby avoiding or reducingthe occurrence of secondary accidents.

The invention relates to a glue. The glue comprises the following components in parts by mass: 35-40 parts of deionized water, 0.3-0.5 part of a polymerization accelerant, 0.01-0.10 part of an anionic-non-ionic surfactant, 0.20-1.00 part of an anionic emulsifying agent, 20-30 parts of butyl acrylate, 10-20 parts of styrene, 5-20 parts of methyl methacrylate, 5-20 parts of acrylic acid, 5-20 parts of hydroxyethyl acrylate, 5-20 parts of glycidyl methacrylate, 0.01-0.03 part of a pH value regulator, 0.03-0.05 part of a reducing agent and 0.05-0.1 part of an initiator. The invention further discloses a preparation method of the glue. The glue provided by the invention has strong adhesion to most of materials, aging resistance, resistance to high temperature and low temperature, resistance to water washing, acid and alkali resistance, safety and environmental friendliness, and can be widely used for electrostatic flocking, coating additives and indoor and outdoor waterproofing projects.

The invention discloses anti-rust additive which belongs to the field of metal corrosion and protection. The invention also relates to a preparation method of the anti-rust additive which comprises that the anti-rust additive is added to water, water-based cutting fluid, water-based grinding fluid, water-soluble anti-rust oil, oil-soluble anti-rust oil, paint or coating to play an anti-rust pole. The anti-rust additive provided by the invention does not contain carcinogen nitrite, and is water-soluble anti-rust additive with good performance and no harm; and in addition, the anti-rust additive is water-soluble, can be used under the condition of hard water, and has good anti-rust effect. The general formula of the anti-rust additive is shown as the accompanying drawing.

The invention relates to an improved time sequence electricity sale quantity prediction method and system based on an economic business method. The prediction method comprises the following steps: obtaining historical monthly electricity selling quantity data of a certain area, predicting monthly electricity selling quantity data of the future n months, and calculating the rising amplitude of thetotal electricity selling quantity value of the future n months relative to the total electricity selling quantity value of the previous n months; obtaining the historical monthly primary economic index data of a certain region to obtain economic indexes, and calculating the rising amplitude of each economic index in the total value of n months in the future relative to the total value of n monthsin the last year; and comparing the power sales rise amplitude with the economic index rise amplitude, and correcting the predicted power sales data. According to the invention, the capacity increaseand reconstruction of a power grid in a future area can be planned in advance, thereby well promoting the healthy, coordinated and rapid development of local economy.

The invention relates to the field of electric power, in particular to an electric power fault wave recording device with a dual processor structure. The device comprises a voltage transformer, a current transformer, a signal conditioning device, an A / D converter, a slave single-chip microcomputer, a master single-chip microcomputer, a liquid crystal displayer, a human-computer interaction device, a USB interface, a clock circuit, an on-off input circuit, an optoelectronic isolation device and a schmitt trigger. According to the electric power fault wave recording device with the dual processor structure, high-speed collected and input voltage and current, on-off contact signals and other electric quantities are converted to digital signals, sampling frequency is high, and the requirement for high-speed recording is met; in addition, dual processor control is used for achieving data processing, data storage and human-computer interaction, the storage capacity for fault data is large, and upgrade and capacity expansion are facilitated.

The invention provides a joint perception method for perceiving belief propagation in a heterogeneous cellular network. The joint perception method belongs to the technical field of cognitive radio. The joint perception method comprises three steps of modeling a Markov random field of each time slot network topology, converting a probability graph model to a factor graph, and realizing estimation for occupation of a specific radio channel by an authorized user by means of a unified complex-weighted belief propagation algorithm. The joint perception method for perceiving belief propagation in the heterogeneous cellular network has advantages of good performance in resisting error perception information, no requirement for any coordination equipment for centralized control, no restriction for number of nodes in the heterogeneous cellular network, and convenient expansion for system capacity.

The invention discloses a semiconductor monocrystalline silicon cleaning agent and a cleaning method thereof, belongs to the technical field of monocrystalline silicon manufacturing and aims to solvethe problem of low monocrystalline silicon cleaning quality in the prior art. The semiconductor monocrystalline silicon cleaning agent is prepared from, by weight, 3 parts of non-ionic surface activeagent, 3 parts of triethanolamine, 9 parts of sulfonic acid and 45 parts of deionized water. The cleaning method utilizes the semiconductor monocrystalline silicon cleaning agent for monocrystalline silicon cleaning, mainly comprises the steps of clear water soaking, acid soaking, clear water soaking, spraying, ultrasonic cleaning and the like and produces the very good cleaning effect on monocrystalline silicon. Rough grains are firstly removed, and then fine grains are cleaned through ultrasonic waves, so that the good monocrystalline silicon cleaning effect and reasonable utilization of thecleaning agent are guaranteed, and the production cost is reduced.

The invention discloses a design method of a spherical or sphere-like lithium ion battery material based on Ni-Co-Mn ternary phase diagram analysis. A positive material is designed as follows: a core component is positioned at a high-capacity area (Ni is more than or equal to 0.7 and less than or equal to 1, and Co is more than or equal to 0 and less than or equal to 0.3) of a phase diagram according to the influence of different contents of Ni, Co and Mn to the performances of the positive material, and a shell material is positioned in a high-safety area (Ni is more than or equal to 1 / 3 and less than or equal to 0.5, and Mn is more than or equal to 1 / 3 and less than or equal to 0.5), so that the Li[(NinCo(1-m-n)Mnm)b(NicCodMn(1-c-d)a)]O2 material has high safety and compounding performances of a high-capacity material, wherein a is more than or equal to 0, b is less than or equal to 1, a+b is equal to 1, n is more than or equal to 1 / 3 and less than or equal to 0.5, m is more than or equal to 1 / 3 and less than or equal to 0.5, d is more than or equal to 0.7 and less than or equal to 1, c is more than or equal to 0 and less than or equal to 0.3, and d+c is less than or equal to 1. A core-shell structure material can show high specific capacity, high circulatory stability and high safety by the complementation of core and shell functions of the core-shell structure. Compared with a homogeneous-phase multielement material, the material disclosed by the invention has the advantages that the large-scale preparation cost is not increased, the repeatability is high, the batch stability is good, the production management is facilitated, and the large-scale commercialization application needs can be met.

The invention discloses a device and method for manufacturing metal flashing plastic through ultrasonic treatment. The device comprises an extrusion die. An extrusion die cavity and a discharge outlet are arranged in the extrusion die. A supporting frame is arranged on one side of the extrusion die, and a temperature sensor is arranged on the other side of the extrusion die. An ultrasonic vibration control device composed of an ultrasonic generator, an amplitude-change pole and a transducer is installed on the supporting frame. One end of the transducer is connected with the ultrasonic generator, and the other end of the transducer is connected with one end of the amplitude-change pole. The other end of the amplitude-change pole is inserted into the extrusion die cavity in the extrusion die. The amplitude-change pole can make direct contact with blending plastic in the extrusion die and can be used for performing ultrasonic treatment on the blending plastic. The temperature sensor can detect the temperature of the blending plastic in the extrusion die, and is connected with a temperature controller. By means of the device and method, the mobility of mixtures of metal powder and plastic is improved; the processing temperature is reduced; the mechanical and high-temperature destructive power of an extrusion process is reduced; protection on the color effect is enhanced; the mechanical properties of materials are improved.

The invention relates to the technical field of substations, and discloses a mobile box-type substation. The mobile box-type substation comprises a box, a fixing frame, a first support seat and a second support seat, wherein the fixing frame is fixedly arranged in the box and with a limiting hole at the top; the first support seat and the second support seat are fixedly connected to the bottom ofthe box; one side of the fixing frame is connected with a first base in a sliding way through a bearing; the top of the first base is fixedly connected with a second base through a first bolt; and oneside of the second base is fixedly connected with a limiting plate. Through the combination of the fixing frame, the bearing, the first base and the second base, the transformer can move inside the box. At the same time, through combination of a limiting plate, a fixing plate, a sleeve, a rotating shaft, a support sleeve and a limit mechanism, a rotating component can be used for supporting the transformer through the fixing plate, thereby reducing the deformation of the first base, facilitating the movement of the transformer, and facilitating the maintenance, replacement and capacity of thetransformer.

The invention discloses a wind power plant low voltage ride through control method, and particularly relates to a control method of a system and a device having a wind power plant low voltage ride through function. A basic principle of the wind power plant low voltage ride through control method is as follows: a three-phase current and voltage of an end, which accesses to a grid, of the wind power plant are measured, and equivalent impedance of the grid is calculated, so that a modularization impedance array which can be adjusted quickly is constructed; and the impedance array is connected with a high-speed circuit breaker in parallel and then is in series connection between a wind power plant converging wire and a boosting transformer incoming circuit breaker, judgment of generation of low voltage is completed within 2-4 milliseconds, the time point of a voltage sine wave zero crossing point is calculated, the high-speed circuit breaker completes a disconnection motion at the zero crossing point, the time of the low voltage judgment and the circuit breaker motion is not more than 12 milliseconds, access in series with a impedance array with the equivalent impedance of the grid is realized, and wire concentration voltage of the wind power plant is maintained to be unchanged.

A longitudinal magazine is longitudinally arranged above a gun barrel (1), the bottom of the longitudinal magazine faces a muzzle, double-row bullets arranged in a double-row magazine body (2) are perpendicular to the gun barrel, bullet tips of the double-row bullets face downwards,at a tail end (1a) of the gun barrel, the double-row magazine body is folded into a single-row magazine body (6) andbent downwards to form a 90-degree fan-shaped body, and the bullets perpendicular to the gun barrel are arranged to a to-be-shot position above the rear portion of the tail end of the gun barrel in aninduced mode; a sliding base (13) is arranged in the double-row magazine body, an arc-shaped push rod (15) is inserted into the sliding base, and the head end of the push rod is connected with a bullet pushing plate (11); a pushing spring (4) presses the sliding base and the bullet pushing plate to push bullets in the double-row magazine body, and a bullet pushing auxiliary spring (17) presses the bullet pushing plate to push bullets in the single-row magazine body. The magazine can reduce the firearm live wire height, is convenient for firearm operation and carrying, and is convenient for expanding the magazine capacity.

The invention provides a battery system control method. If a battery system becomes a large-scale system, all of the unit voltage information is collected to a controller for controlling a battery so as to realize the equalization of unit voltages, so that necessary communication speed has to be improved and communication wiring to the controller has to be increased. The entire voltage of batteries is transmitted to a higher-ranking controller as information. The higher-ranking controller gives a discharge instruction or the like to a lower-ranking controller having a voltage higher than those of the other controllers. Thus, voltage variation of the respective batteries is balanced.

The invention belongs to the technical field of paint, and provides self-cleaning type stone-like paint. The self-cleaning type stone-like paint is prepared from the following components in parts by weight: 50-60 parts of natural colored sand, 50-60 parts of silicon-acrylic emulsions, 30-40 parts of deionized water, 20-25 parts of polyethylene glycol, 20-25 parts of diatomaceous earth, 10-15 partsof aminopropyl isobutylsilsesquioxane, 10-15 parts of calcium carbonate, 10-15 parts of polyvinylidene fluoride, 10-15 parts of zinc oxide, 5-10 parts of stearic acid, 3-5 parts of polymethyl methacrylate, 1-2 parts of adhesion aids, 1-2 parts of defoaming agents, 1-1.5 parts of coalescing agents and 0.7-1.3 parts of preservatives. A step-by-step mixing method is applied to preparation of the self-cleaning type stone-like paint. The self-cleaning type stone-like paint has the advantages that the technical problems of the paint in the prior art, such as proneness to peeling and cracking, longspray-drying time, low bonding strength and low durability, are solved.

An artificial cerebrospinal fluid comprising 120 to 160 mEq / L of a sodium ion, 1 to 6 mEq / L of a potassium ion, 75 to 155 mEq / L of a chlorine ion and 5 to 45 mEq / L of a bicarbonate ion; or an artificial cerebrospinal fluid further comprising at least one component selected from 10 g / L or less of a reducing sugar, 5 mmol / L or less of phosphoric acid, 5 mEq / L or less of a calcium ion and 5 mEq / L or less of a magnesium ion in addition to the components mentioned above. By using the artificial cerebrospinal fluid as a washing fluid or a perfusion fluid in the field of neurosurgery including intracranial surgery or a fluid replenisher for the lost cerebrospinal fluid, the development of cerebral edema can be prevented or reduced and a brain cell disorder can also be inhibited.

The invention relates to the technical field of substations, and discloses a mobile box-type substation. The mobile box-type substation comprises a box, a fixing frame, a first support seat and a second support seat, wherein the fixing frame is fixedly arranged in the box and with a limiting hole at the top; the first support seat and the second support seat are fixedly connected to the bottom ofthe box; one side of the fixing frame is connected with a first base in a sliding way through a bearing; the top of the first base is fixedly connected with a second base through a first bolt; and oneside of the second base is fixedly connected with a limiting plate. Through the combination of the fixing frame, the bearing, the first base and the second base, the transformer can move inside the box. At the same time, through combination of a limiting plate, a fixing plate, a sleeve, a rotating shaft, a support sleeve and a limit mechanism, a rotating component can be used for supporting the transformer through the fixing plate, thereby reducing the deformation of the first base, facilitating the movement of the transformer, and facilitating the maintenance, replacement and capacity of thetransformer.

The invention discloses a solvent-resistant and low temperature impact-resistant polycarbonate alloy material and a preparation method thereof. The alloy material concretely comprises, by weight, 30-70 parts of PC resin, 8-20 parts of PET resin, 5-20 parts of polymer composite microspheres, 1-3 parts of an antioxidant and 0.5-2 parts of a lubricant, and the polymer composite microspheres are prepared from, by weight, 3-10 parts of a fluorine-containing acrylate / maleic anhydride block copolymer, 1-7 parts of functionalized fullerene powder and 1-3 parts of a surfactant. Functionalized polymer composite microsphere master batches are prepared by using an efficient emulsion polymerization process, the organic-inorganic hybrid polymer composite microspheres take fullerene C60 as a core and thefluorine-containing acrylate / maleic anhydride copolymer as a long-chain branch, the unique core-shell structure can improve the stability of the PC / PBT alloy material in various chemicals, and an acrylate elastomer layer has good interfacial compatibilizing and toughening effects as a microsphere shell.

The invention discloses a vertical type multilayer wind power generation system fixed jointly by a foundation platform and a framework steel cable and relates to a vertical type multiplayer wind power machine system in order to solve the problems of small anti-tipping torque and low storm destroying resistance in the conventional wind power generation system. A foundation framework is formed by encircling a foundation cross beam rebar skeleton of the foundation platform; a generator seat rebar skeleton is arranged in the center of the foundation framework through an inner supporting beam rebar skeleton; a fixing steel cable square pier rebar skeleton is arranged around the foundation framework through a fixing steel cable square pier supporting beam rebar skeleton; the lower ends of the fixing steel cable square pier rebar skeleton, a vertical stand square pier rebar skeleton, the generator seat rebar skeleton and the foundation cross beam rebar skeleton are fixedly connected with a pile rebar skeleton; the foundation platform is formed by integrally casting concrete; the lower end of the pile rebar skeleton is hammered into the ground; and the multilayer compound wind power system is connected with a pull ring on the fixing steel cable square pier rebar skeleton through a framework steel cable fixing system in a tensioning manner. The vertical type multilayer wind power generation system is applied to wind power generation.

The invention discloses a hot plug type conversion system for new energy and an energy storage system, which comprises a DC (Direct Current) power supply, bidirectional DC / DC (Direct Current / Direct Current) converters, a DC bus, a bidirectional DC / AC (Direct Current / Alternating Current) power converter and a parallel switch. A cell array is accessed to an inversion system by the bidirectional DC / DC converters, so that the conversion system can adapt to the cell arrays in various forms. A DC power line carrier communication mode is adopted, so that the conversion system is simpler, more convenient and quicker to mount or maintain, and more reliable in parallel operation, and various current equalization control strategies can be adopted conveniently. The communication mode is matched with a hot plug power switch for achieving hot plug of the cell array and the bidirectional DC / DC converters, so that the defect that outage is required under the condition that the DC side cell array of the traditional DC / AC inversion system is in a failure or maintenance state is overcome; the reliability and the fault-tolerant ability of the overall conversion system are improved; and the capacity of the overall conversion system is convenient to expand.

The invention discloses a log data processing method, system and device and a medium, the log data processing method is applied to a log storage system, the log storage system comprises a column database management system, and the method comprises the steps of obtaining target log data from the column database management system; processing the target log data in a preset management mode to obtain a log management result, wherein the preset management mode corresponds to at least one of IDC management, NODE management, cluster management, database management, table structure management, data pipeline management, account management, log management and log access management. According to the invention, through mutual cooperation and mutual coordination among multiple preset management modes, self-service management of the full life cycle of the log is realized, processing of super-large-scale log data and management of the column database management system are realized, and the operation, maintenance and management costs of the column database management system are greatly reduced.

The invention relates to a preparation method of polylactic acid / polyadipic acid-polybutylece terephthalate blend, and belongs to the field of high molecular polymer blending modification. In the method, the injection of a supercritical carbon dioxide fluid can generate synergistic capacity increasing and toughening effects on the PLA / PBAT blend with a chain extender ADR or ADR and organic montmorillonite (OMMT) beside reducing the viscosity of a processed melt, so as to further refine a PBAT dispersion phase and enhance the adhesion of a PLA / PBAT interface layer. Finally, a set of PLA / PBAT modified blends with high toughness is obtained, and the maximum notched impact strength is 36.23 kJ / m2. Under the plasticization of the supercritical carbon dioxide fluid, the selective distribution ofOMMT nanoparticles in the PBAT and PLA interface layers and in-situ generated PLA-ADR-PBAT block macromolecules can stabilize the interface of PBAT dispersion phase; and the synergistic effect enables the dispersion phase to be better refined during the blending process, thereby improving the impact toughness of the blend.

The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a preparation method for a negative electrode material of the lithium-ion battery. The preparation method comprises the steps of ball-milling fine powder of artificial graphite wastes, SiO particles and organic carbon sources, thus acquiring mixed powder; then mixing the mixed powder with nitrogen-containing compounds; and nitriding in the atmosphere of protective gases at high temperatures of 300-1200 DEG C, thus acquiring the negative electrode material of the lithium-ion battery. According to the preparation method provided by the invention, the artificial graphite wastes can be better utilized for recycling, oxygen-containing functional groups on the surfaces of the artificial graphite wastes can be removed by nitrogen treatment, and primary coulombic efficiency, cycling stability and reversible capacity of the artificial graphite wastes can be improved. In addition, due to the mixture of silicon monoxide and the artificial graphite, both advantages can be integrated and both disadvantages can be weakened, and then the negative electrode material of the lithium-ion battery with high coulombic efficiency, good cycling performance, high capacity, high power and relatively small expansion can be acquired for the first time via effective coverage.