56results about How to "Improve output characteristics" patented technology

The invention provides an electromagnetic noise prediction control method for a vehicle silicon carbide controller, and the method comprises the steps: receiving parameters, such as d-axis current, q-axis current, rated torque and actual rotating speed, so as to calculate a rotating speed error signal; a discrete anti-integral saturation speed PI controller is used to calculate a reference torque according to the error signal, and the modulation wave frequency, the electrical angle frequency and the stator flux linkage are further deduced. D-axis voltage and q-axis voltage at the next moment are predicted through a current prediction control algorithm, compensation is carried out to obtain predicted values of torque and electromagnetic noise, and meanwhile a carrier wave ratio predicted value at the next moment is calculated. Calculating a cost function under different switching states, wherein the function comprehensively considers the weight factors of the carrier ratio and the common-mode voltage EMI suppression value; and digital filtering is carried out by selecting a value which minimizes the cost function, and the value is output to a silicon carbide controller so as to drive the permanent magnet synchronous motor to operate. The invention aims to effectively reduce electromagnetic interference generated in high-frequency switching operation and improve the output performance of a motor at the same time.

The invention discloses a non-aqueous electrolyte for a sodium ion battery. The non-aqueous electrolyte comprises the following components in parts by weight: 70-85 parts of an organic solvent, 10-20 parts of an electrolyte, 0.5-5 parts of a first film-forming additive and 0.5-5 parts of a second film-forming additive, the first film-forming additive is selected from any one or more of 1, 3-propene sultone, 1, 3-propane sultone, methylene methanedisulfonate and 1, 4-butane sultone, and the second film-forming additive is selected from any one or more of 1, 3-propene sultone, 1, 3-propane sultone, methylene methanedisulfonate and 1, 4-butane sultone; the second film-forming additive is selected from any one or more of fluoroethylene carbonate, vinylene carbonate, ethylene sulfate, vinylene sulfate and ethylene sulfite; the electrolyte is composed of sodium hexafluorophosphate, sodium bis (oxalato) borate, sodium bis (fluorosulfonyl) imide and sodium tetrafluoroborate according to the weight ratio of (14-24): (0-1): (0-1): (0-1). By adding the first film-forming additive and the second film-forming additive, the battery film formation is facilitated, the cycle performance is improved, the service life of the sodium battery can be more effectively prolonged, and the sodium battery can be better applied to the fields of energy storage, low-speed vehicles and passenger vehicles.

The present invention relates to a non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same. Specifically, the non-aqueous electrolyte solution for a lithium secondary battery includes a lithium salt, an organic solvent and a compound represented by Formula 1 to form a robust SEI film, thereby improving battery performance.

The invention discloses a multi-parameter SCH-QW semiconductor laser circuit model. The circuit model comprises an intrinsic network equivalent circuit part and a packaging parasitic network circuit part; the intrinsic network equivalent circuit part comprises an SCH region, a Gateway region, a quantum well (QW) region and a stimulated radiation region; the SCH region exchanges current carriers with the Gateway region in a bipolar diffusion and current carrier release manner; the quantum well QW region has a quantum well structure, and exchanges carriers through capture and thermal excitation; the Gateway region is used as a portal of carrier exchange of the SCH region and the QW region; the packaging parasitic network circuit part comprises a gold wire, a lumped part and a substrate; the gold wire comprises an inductor LB, a resistor RB and a capacitor CB, the lumped part comprises a lumped capacitor CS and a lumped resistor RS, and the substrate comprises a substrate resistor RSUB. The invention further discloses a construction method of the circuit model and application of the circuit model in simulation of influences of saturation nonlinear effect parameters and ABC coefficients on model output.

The present invention relates to a negative electrode active material comprising: artificial graphite particles; and sulfur (S) distributed in the artificial graphite particles, wherein the sulfur content in the negative electrode active material is 15 ppm to 40 ppm. A negative electrode and secondary battery that comprise the negative electrode active material can have both improved output characteristics and capacity characteristics, as well as improved initial efficiency.

The present invention provides an electrode for a non-aqueous electrolyte secondary battery capable of obtaining high output characteristics and a non-aqueous electrolyte secondary battery having the same. The electrode for a non-aqueous electrolyte secondary battery comprises a current collector and a positive electrode active material layer disposed on the current collector and containing a positive electrode active material, wherein the positive electrode active material comprises compound particles having a layered structure formed by two or more transition metals, wherein the average particle size DSEM of the compound particles based on electron microscope observation is 1 μm or more and 7 μm or less, the ratio of the 50% particle size D50 in the cumulative particle size distribution based on the volume basis to the average particle size DSEM is 1 or more and 4 or less, and the ratio of the 90% particle size D90 in the cumulative particle size distribution based on the volume basis to the 10% particle size D10 in the cumulative particle size distribution based on the volume basis is 4 or less, and the porosity of the positive electrode active material layer is 10% to 45%.

The utility model relates to the technical field of marine engines, and discloses a variable valve timing and lifting device of a marine four-stroke engine, which comprises a rocker arm and a cam, a shaft hole connected with a fixed rotating shaft is arranged at one end of the rocker arm, a driving ring is arranged between the fixed rotating shaft and the rocker arm, and a step groove is arranged in the middle of the rocker arm. A step groove is formed in the rocker arm, a roller control arm is arranged in the step groove, a roller is arranged in the roller control arm, the roller control arm is connected with the driving ring, the driving ring can drive the roller control arm to move back and forth in the step groove, and the cam is located above the rocker arm and makes contact with the roller in the step groove of the rocker arm. The driving device is additionally arranged on the roller on the rocker arm of the valve mechanism of the four-stroke engine, so that the position of the roller relative to the cam is variable, the function that the phase of the valve mechanism of the engine is variable is achieved, the output characteristic of the engine can be effectively improved, the fuel economy is improved, and the system is simple and compact in structure and convenient to maintain.

The positive electrode active material is configured so as to be usable in a non-aqueous electrolyte secondary battery. The positive electrode active material has a composition represented by the compositional formula LiaNibMncWdMgeOf (wherein a-f in the compositional formula satisfies the following relationship: 0.9 < a < 1.2, 0.45 < b < 0.6, 0.25 < c < 0.5, 0 < d < 0.06, 0 < e < 0.1, and 1.9 < f < 2.1), and has a layered rock salt crystal structure attributable to space group R-3m.

The utility model discloses a stable output device for a laser head of a high-power laser, which comprises a bottom plate, side plates are vertically arranged on two sides of the bottom plate, a front plate and a rear plate are vertically arranged at two ends of the bottom plate respectively, the front plate and the rear plate are perpendicular to the side plates, and a top plate is arranged at the tops of the side plates, the front plate and the rear plate. Sliding rails are arranged at the right-angle positions formed between the bottom plate and the side plate and between the top plate and the side plate, sliding blocks are arranged on the sliding rails, idler wheels are arranged on the sliding blocks, a mounting disc is arranged on the inner side of a structure formed by the four idler wheels, a primary rotating disc is arranged in the mounting disc, a secondary rotating disc is arranged in the primary rotating disc, and a grating plate is arranged in the secondary rotating disc. The beneficial effects of the utility model are that through the arrangement of the high-precision grating adjusting device, more accurate control can be provided through the fine adjustment of the position of the grating, the performance of the grating can be timely adjusted, the output characteristics of the laser can be timely optimized, and the output stability of the output head can be ensured.

A non-aqueous electrolyte secondary battery, a method for manufacturing the same, and a slurry suitable for forming an electrode slurry layer of the non-aqueous electrolyte secondary battery, the non-aqueous electrolyte secondary battery having a positive electrode slurry layer, a separator, and a negative electrode slurry layer in this order, the positive electrode slurry layer is configured from a slurry in which a positive electrode active material is dispersed in a non-aqueous electrolyte solution containing a solvent having a relative dielectric constant of 5.0 or more and a viscosity of less than 2.0 mPas, and the negative electrode slurry layer is configured from a slurry in which a negative electrode active material is dispersed in a non-aqueous electrolyte solution containing a solvent having a relative dielectric constant of 5.0 or more and a viscosity of less than 2.0 mPas.

A nonaqueous electrolytic solution for a nonaqueous electrolytic solution battery including a positive electrode which contains an oxide containing at least nickel as a positive electrode active material and has a content of nickel of 30% by mass to 100% by mass in a metal contained in the positive electrode active material, the nonaqueous electrolytic solution including: (I) a nonaqueous solvent; (II) a solute; and (III) a compound represented by General Formula [1], in which a content of (III) is 0.001% by mass to 1.8% by mass with respect to 100% by mass of a total amount of (I) to (III),         R(SO2X)m     [1] in which R represents monovalent to tetravalent groups containing at least one carbon atom, and the group may contain at least one selected from the group consisting of hydrogen atoms, halogen atoms, unsaturated bonds, aromatic rings, oxygen atoms, and ester bonds. X represents a halogen atom or a linear or branched perfluoroalkyl group having 1 to 10 carbon atoms. m represents an integer of 1 to 4. when m represents an integer of 2 to 4, a plurality of X may be the same or different.

The invention provides an optical storage converter DC output voltage control method comprising the following steps: collecting output voltage and current, and determining a current limiting coefficient C according to the current output voltage, a preset output voltage and the difference between the current output voltage and the preset output voltage; then, according to the current limiting coefficient, the preset maximum power and the current output voltage, a current limiting value Ilimit is determined; a voltage and current double-loop control strategy is adopted, the duty ratio of the PWM signal is adjusted, and the PWM signal is generated; and finally, a PWM signal is used for driving a power switch device, adjusting the output voltage and current, and cooperating with the MPPT function of the inverter to track the maximum power point, so that the light storage controller is ensured to stably work near the preset voltage, and high-efficiency energy output is realized. According to the method, the output characteristic of the optical storage controller is similar to that of a photovoltaic panel, and the optical storage controller has a settable maximum power point, quickly responds to voltage change, avoids undervoltage or overcurrent and is adaptive to various micro inverters.

The invention provides a high-crystallinity hollow positive electrode precursor and a preparation method and application thereof. The method comprises the following steps: a ternary transition metal mixed salt solution, a precipitant solution and a complexing agent solution are introduced into a base solution in a parallel flow manner, a co-precipitation reaction is performed, feeding is stopped when particles subjected to the co-precipitation reaction grow to target particle sizes, and the high-crystallinity hollow positive electrode precursor is obtained, wherein the co-precipitation reaction comprises a nucleation stage and a growth stage, the feeding speed of a precipitant solution in the nucleation stage is smaller than the feeding speed of the precipitant solution in the growth stage, and the feeding speed of the precipitant solution in the co-precipitation reaction is smaller than 10 L / h. The ternary positive electrode material prepared from the high-crystallinity hollow positive electrode precursor provided by the invention has high capacity and also has good structural stability and cycling stability.

Provided is a battery that has a large energy density and excellent output characteristics. A battery of the present invention relates to Sustainable Development Goals 12, 3, 7, and 11. A battery of an aspect of the present invention includes a plurality of unit electrode bodies. Each unit electrode body includes a positive electrode that includes a molded body of a positive electrode mixture that contains a positive electrode active material, a negative electrode that includes a negative electrode active material layer that contains a negative electrode active material, and a solid electrolyte layer or a separator that is interposed between the positive electrode and the negative electrode. The plurality of unit electrode bodies is stacked on top of each other. Adjacent ones of the unit electrode bodies are connected with each other in series. L / S ≤ 0.5 and 0.02 ≤ L ≤ 0.20, where L (cm) is the thickness of each unit electrode body, and S (cm2) is the electrode area of the unit electrode body. The molded body of the positive electrode mixture and the negative electrode active material layer each have a porosity of 10% or less. When the solid electrolyte layer is included, the solid electrolyte layer has a porosity of 10% or less.

The invention discloses a magnetic energy collector based on a double-coil structure and a method. In the magnetic energy collector, a magnetic core is sleeved in a primary side current circuit; the secondary side energy taking coil is wound on one side of the magnetic core, the rectifier bridge is connected with the secondary side energy taking coil, the constant voltage load is connected with the rectifier bridge to store electric energy from the secondary side energy taking coil, the secondary side control coil is wound on the other side of the magnetic core, and the controlled switch S is connected with the secondary side control coil. The controlled switch S is switched on and off through a signal, the controller is connected with the controlled switch S and sends the signal to the controlled switch S, and the controller comprises a comparison circuit used for detecting a primary side current zero crossing point. The magnetic energy collector based on the double-coil structure simultaneously solves the problems of the magnetic energy collector when the primary side current is too small and too large.

The invention discloses an abnormal video detection method, system and terminal based on artificial intelligence, and relates to the technical field of electronic information. The detection method comprises the following steps: converting an original video into a frame sequence, and obtaining a high-dimensional feature vector of each frame of image; extracting text features of the original video to obtain text feature vectors; performing feature fusion on the high-dimensional feature vector and the text feature vector by adopting a Late Fusion method and a cross-modal attention mechanism to obtain a multi-modal feature sequence; performing feature processing on the multi-modal feature sequence by adopting a multi-layer Transform encoder to obtain a processed feature sequence; performing post-processing on the processed feature sequence to obtain an abnormal information value; configuring an abnormal information threshold value, and when the abnormal information value is greater than the abnormal information threshold value, judging that the video is an abnormal video; and when the abnormal information value is smaller than or equal to the abnormal information threshold value, judging that the video is a non-abnormal video. The multi-modal information can be fully utilized, the feature fusion result is optimized, and the detection performance is improved.

This non-aqueous electrolyte secondary battery has: an electrode body formed by winding, in a flat shape, a positive electrode and a negative electrode with a separator interposed therebetween; and a non-aqueous electrolyte. The positive electrode has a positive electrode mixture layer containing a positive electrode active material. In the positive electrode mixture layer, 0.10-0.30 mass% of ceramic particles are added, the volume-based median size (D50) of the ceramic particles is 0.5 µm or less, the air permeability of the separator is 165-310 sec / 100 ml, and the air permeability of a flat portion of the separator with respect to the air permeability of a curved portion of the separator is 120-140%.

The present invention relates to a positive electrode active material and a method for manufacturing the same, the positive electrode active material comprising: a lithium transition metal oxide in the form of a single particle and divided into a surface portion and a core; a coating part which is formed on the surface part and contains cobalt; and an island part which is discontinuously formed on at least one selected from the group consisting of the surface part and the coated part, in which the island part contains 0.08-2.50 mol% of at least one selected from the group consisting of aluminum (Al) and zirconium (Zr) based on the total number of moles of the positive electrode active material.

Provided is an electrode binder for a biofuel cell, which can produce a biofuel cell exhibiting excellent output characteristics, and which provides an electrode paste that is low in environmental load and has good dispersibility of an electrically conductive material and is suitable for screen printing. The electrode binder for a biofuel cell of the present invention comprises a polymer (A) having a first structural unit derived from a nonionic ethylenically unsaturated monomer (a1), a second structural unit derived from an anionic ethylenically unsaturated monomer (a2), and a third structural unit derived from a crosslinking agent (a3) having two or more ethylenically unsaturated bonds in one molecule.

The present invention provides an electrode for a non-aqueous electrolyte secondary battery capable of obtaining high output characteristics and a non-aqueous electrolyte secondary battery having the same. The electrode for a non-aqueous electrolyte secondary battery comprises a current collector and a positive electrode active material layer disposed on the current collector and containing a positive electrode active material, wherein the positive electrode active material comprises compound particles having a layered structure formed by two or more transition metals, wherein the average particle size DSEM of the compound particles based on electron microscope observation is 1 μm or more and 7 μm or less, the ratio of the 50% particle size D50 in the cumulative particle size distribution based on the volume basis to the average particle size DSEM is 1 or more and 4 or less, and the ratio of the 90% particle size D90 in the cumulative particle size distribution based on the volume basis to the 10% particle size D10 in the cumulative particle size distribution based on the volume basis is 4 or less, and the porosity of the positive electrode active material layer is 10% to 45%.

This non-aqueous electrolyte secondary battery comprises an electrode body, an exterior body which has a prescribed exterior shape and which houses the electrode body, and a sealing body which seals an opening at the upper end of the exterior body. A positive electrode included in the electrode body includes a positive electrode current collector and a positive electrode mixture layer which is formed on the surface of the positive electrode current collector and which includes a positive electrode active material and a conductive agent. The positive electrode active material contains a lithium-containing complex oxide. The lithium-containing complex oxide has a layered rock salt structure, contains substantially no Co, and contains at least Ni and Mn. The Ni content in the lithium-containing complex oxide is not less than 70 mol% with respect to the total number of moles of metal elements excluding Li. The basis weight of the positive electrode mixture layer is not less than 250 g / m2. Three or more positive electrode leads are drawn out in the electrode body.

Provided is a technique that makes it possible to cause a secondary battery to display excellent output characteristics and other characteristics. Secondary battery production is performed using a conductive material dispersion liquid that contains a conductive material, a dispersant, and a solvent. The conductive material is one or more carbon nanotubes having a specific surface area of not less than 800 m2 / g and not more than 1,300 m2 / g and having a volume-average particle diameter (D90) of 50 µm or less in the conductive material dispersion liquid. The dispersant is a hydrogenated acrylonitrile-butadiene copolymer having a weight-average molecular weight of 200,000 or less.

Provided are carbonaceous-coated graphite particles having excellent output characteristics, fast charge characteristics, and cycle characteristics when used as a negative electrode material for a lithium ion secondary battery. The carbonaceous-coated graphite particles comprise graphite particles and carbonaceous that coats at least a portion of the surfaces of the graphite particles, the mass reduction initiation temperature when heated in a water vapor atmosphere is 800-980 DEG C, and the content of the carbonaceous is 0.1-15.0 parts by mass per 100.0 parts by mass of the graphite particles.

The present embodiment relates to a positive electrode active material, a preparation method thereof, and a lithium secondary battery comprising the positive electrode active material. According to one embodiment, the positive electrode active material is a lithium metal oxide particle in the form of a secondary particle comprising a primary particle, a coating containing a boron compound is located on at least a portion of the surface of the primary particle, and the boron compound may include an amorphous structure.

Provided are: an all-solid-state battery having excellent output characteristics; and an all-solid-state battery negative electrode capable of constituting the all-solid-state battery. This negative electrode for an all-solid-state battery is a negative electrode used in an all-solid-state battery, has a molded body of a negative electrode mixture containing a negative electrode active material, a solid electrolyte, and a conductive auxiliary agent, and is characterized in that: the negative electrode active material contains lithium titanium oxide particles having a ratio Dp / D50 of a primary particle diameter Dp to a particle diameter D50 of greater than 0.6 and a specific surface area of 2 m2 / g or more; the molded body of the negative electrode mixture is formed by mixing the negative electrode mixture with a solvent, preparing a negative electrode mixture-containing composition, applying the negative electrode mixture-containing composition to a substrate, drying, and then performing a pressure treatment.

The present application aims to provide a slurry composition for a full solid secondary battery, which can form a solid electrolyte-containing layer that can allow a full solid secondary battery to exhibit excellent output characteristics and cycle characteristics. The slurry composition of the present application contains a solid electrolyte, a particulate polymer, and an organic solvent. The particulate polymer has a core-shell structure having a core portion and a shell portion covering at least a part of the outer surface of the core portion, the glass transition temperature of the polymer constituting the core portion is -60°C or higher and -10°C or lower, and the glass transition temperature of the polymer constituting the shell portion is 15°C or higher and 100°C or lower. Furthermore, the polymer constituting the shell portion contains a nitrogen-containing functional group monomer unit at a proportion of 10% by mass or more and 90% by mass or less.

Provided are: an all-solid-state battery having excellent output characteristics; and an all-solid-state battery negative electrode capable of constituting the all-solid-state battery. This negative electrode for an all-solid-state battery is a negative electrode used in an all-solid-state battery, has a molded body of a negative electrode mixture containing a negative electrode active material, a solid electrolyte, and a conductive auxiliary agent, and is characterized in that: the negative electrode active material contains lithium titanium oxide particles having a ratio Dp / D50 of a primary particle diameter Dp to a particle diameter D50 of greater than 0.6 and a specific surface area of 2 m2 / g or more; the measurement of D50 and the specific surface area uses lithium titanium oxide particles obtained in the following order (1) to (4): (1) 0.1 g of a sample is taken from a molded article of the negative electrode mixture; (2) washing with 200 cc of water for two times, placing in 200 cc of water for 12 hours, leaving the part settled in the water, and discarding the supernate; (3) repeating the operation in the step (2) for 10 times; and (4) drying the obtained precipitate at 120 DEG C for 2 hours, and further drying at 60 DEG C for 12 hours.

The present invention relates to a method of preparing a lithium secondary battery which includes steps (1) to (5) below. (1) preparing a first positive electrode active material by mixing a small particle lithium composite transition metal oxide having an average particle diameter (D50) of less than 7 um with a boron-containing raw material and performing a heat treatment; (2) preparing a second positive electrode active material by mixing a large particle lithium composite transition metal oxide having an average particle diameter (D50) of 8 um or more with a cobalt-containing raw material and a boron-containing raw material and performing a heat treatment; (3) mixing the first positive electrode active material and the second positive electrode active material to prepare a positive electrode material having a bimodal particle diameter distribution; (4) preparing a positive electrode by coating the positive electrode material on a positive electrode collector; and (5) assembling the positive electrode, a negative electrodeincluding a silicon-based negative electrode active material, and a separator

The present invention relates to a lithium secondary battery and a method for manufacturing the same, the lithium secondary battery comprising: a positive electrode, a negative electrode, a separator, and an electrolyte, in which the positive electrode comprises a lithium-rich manganese-based oxide in which the content of manganese in all metals other than lithium is greater than 50 mol%; and the ratio of the number of moles of lithium to the number of moles of all metals other than lithium (Li / Me) is greater than 1, where in a dQ / dV map obtained by differentiating a map of a battery discharge capacity Q and a voltage V measured while charging the lithium secondary battery at 0.1 C to 4.6 V and then discharging the lithium secondary battery at 0.1 C to 2.0 V, the total discharge curve area is defined as 100%, and the ratio of the number of moles of lithium to the number of moles of all metals other than lithium (Li / Me) is greater than 1. The discharge curve area in the voltage range of 2.0 to 3.5 V is 35% or less.

A display device and a method of manufacturing the same are provided. The display device includes: a substrate including a display area and a driving circuit area; a first transistor in the display area and including a first active layer on the substrate and a first gate electrode on the first active layer; a first gate insulating layer between the first active layer and the first gate electrode and entirely covering the first active layer; a second transistor in the driving circuit region and including a second active layer on the substrate and a second gate electrode on the second active layer; a second gate insulating layer between the second active layer and the second gate electrode, covering a portion of the second active layer overlapping the second gate electrode, and exposing other portions of the second active layer; and a first oxide semiconductor layer between the first gate insulating layer and the first gate electrode.