21results about How to "Improve charging capacity" patented technology

The invention provides a positive pole piece, a battery cell, a secondary battery and a power utilization device, the positive pole piece comprises a positive active material and a lithium supplement additive, the lithium supplement additive satisfies the following relational expression: R < = Cmin / (100 * m * Q), in the formula, m represents the loading capacity on the positive pole piece per unit area, and the loading capacity comprises the total mass of the positive active material and the lithium supplement additive; cmin represents the minimum multiplying power value applied to the positive pole piece in the actual application process; q represents the theoretical gram capacity of the lithium supplement additive; r represents the mass percentage content of the lithium supplement additive in the loading capacity on the positive pole piece per unit area. The positive pole piece provided by the invention can improve the charging capacity of the battery cell and the secondary battery.

The invention discloses a filter material corona charged particle bed and a filtering method thereof. The electric particle bed comprises a particle bed shell, an air distribution device and a filtering layer filled with filter material particles, wherein the air distribution device and the filtering layer are sequentially arranged in the particle bed shell from bottom to top; the particle bed shell is provided with an air inlet located above the filter layer and an air outlet located below the air distribution device, a corona discharge electrode is horizontally buried in the filter layer, a grounding electrode is horizontally placed above the filter layer and below the air inlet, the corona discharge electrode is connected with the high-voltage output end of the high-voltage pulse switching power supply, and the grounding electrode is connected with the high-voltage output end of the high-voltage pulse switching power supply. The grounding electrode is connected with the grounding end of the high-voltage pulse switching power supply and a ground wire; a gap corona charge region is formed in a space between the corona discharge electrode and the grounding electrode; the electrostatic enhanced dust collector has the advantages that the charged filter material particles are utilized to generate strong electrostatic attraction on dust with charges opposite to the polarity of the charged filter material particles, the electrostatic enhanced filtering effect is improved, and the filtering efficiency is remarkably improved.

The invention provides an electrolyte as well as a preparation method and application thereof. The electrolyte comprises an organic solvent, a lithium salt, an interface additive and a fluorine-containing diluent, the interface additive comprises a boric acid disultone compound; the boric acid disultone compound has a structure as shown in a formula I; according to the electrolyte, the interface additive with a specific structure and the fluorine-containing diluent are compounded, so that the electrolyte is high in conductivity, a unique high-voltage-resistant fast-charging electrolyte system is formed, the high-voltage-resistant performance and the cycle performance of the battery are improved, and under the same condition, the charging capacity is higher, and the battery has good fast-charging performance.

The application relates to the technical field of batteries, in particular to a hard carbon negative electrode material and a preparation method and application thereof. A preparation method of a negative electrode hard carbon material comprises the following steps: carrying out first heat treatment on a mixture of an organic metal catalyst and biomass activated carbon, introducing a gas-phase carbon source and carrying out second heat treatment to obtain first material, and carrying out carbonization treatment and acid pickling treatment on the first material. The method can improve the capacity and initial efficiency of the hard carbon negative electrode material through cooperation of various steps; the method is simple in process and easy to realize large-scale production.

The invention discloses a lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium-rich manganese-based positive electrode materials. According to the positive electrode material disclosed by the invention, the lithium-rich manganese-based positive electrode material is prepared by mixing the transition metal carbonate precursor subjected to pre-decomposition heat treatment with the lithium source, then carrying out segmented heat treatment and carrying out solid-solid reaction, so that the diffusion distance of lithium ions in the synthesis process can be limited, and the abnormal growth of crystal grains is inhibited; the lithium-rich manganese-based positive electrode material with small and uniform grain size is prepared, and the small grain size is beneficial to de-intercalation of lithium ions in the charging and discharging process, so that the charging capacity and the discharging capacity are improved at the same time.

The application relates to the technical field of wireless charging and discloses an automatic power-off control method for a wireless charging system, which comprises the following steps: acquiring historical charging sample data; modeling capacity attenuation data by using a Weibull distribution to construct a Weibull distribution model; modeling overvoltage fault discrete data by using a beta distribution to construct a beta distribution model; fusing the Weibull distribution model and the beta distribution model to construct a hybrid loss function and calculate expected loss values under different off-voltages; selecting an off-voltage that makes the expected loss value minimum as an optimal off-voltage output; judging whether a real-time collected port voltage is less than the optimal off-voltage, if yes, the system normally charges and continuously monitors, otherwise, the system stops charging and shuts down; after charging is completed, characteristic data of this time of charging are recorded and updated; and the application solves the technical problem that a battery is overcharged or undercharged due to the adoption of a fixed voltage threshold.

This invention relates to a low-temperature charging method for lithium-ion batteries. The method includes acquiring constant-capacity data of the battery measured at room temperature, where n1, n2, and n3 represent the charging capacities corresponding to 25–35% SOC, 45–55% SOC, and 75–85% SOC, respectively, and aV, bV, and cV represent the corresponding voltages; preparing for charging at low temperature; charging to aV at a first-rate constant current, recording the capacity m1; determining whether the condition n1 / m1 ≥ 65% is met; if not, maintaining a constant voltage to 0.08–0.12C; if the condition is met, charging to bV at a second-rate constant current, recording the capacity m2; determining whether n2 / m2 ≥ 65% is met; if not, maintaining a constant voltage to 0.03–0.07C; if the condition is met, charging to cV at a rate of 0.33C, recording the capacity m3; determining whether n3 / m3 ≥ 65% is met; if not, maintaining a constant voltage to 0.08–0.12C; if the condition is met, charging at a third-rate constant current. This invention can improve charging capacity and charging efficiency, and improve or prevent lithium plating.

The invention provides a composite crystal lithium manganate material, a lithium ion battery and a preparation method, and relates to the technical field of lithium ion batteries. The composite crystal lithium manganate material is composed of a monoclinic layered structure, an orthogonal layered structure and a tetragonal distorted spinel structure according to different proportions. By regulating and controlling the proportion of the three crystal structures, stable lithium manganate and capacitive lithium manganate can be obtained, and the capacity or cycle performance of the material can be improved. And the preparation method of the composite crystal form lithium manganate material is simple, controllable in condition and suitable for large-scale production.

A negative electrode for a secondary battery according to an exemplary embodiment may include: a negative electrode current collector; a first negative electrode active material layer that is provided on at least one surface of the negative electrode current collector and contains a first negative electrode active material containing a first silicon composite oxide; and a second negative electrode active material layer that is provided on the first negative electrode active material layer and contains a second negative electrode active material containing a second silicon composite oxide. The first silicon composite oxide and the second silicon composite oxide may each include a metal, and the BET specific surface area of the first silicon composite oxide and the second silicon composite oxide may be 2.0-6.5 m2 / g. Therefore, the charging / discharging capacity of the negative electrode can be increased while the stability of the negative electrode can be improved.

The present invention discloses a compact two-stage electrostatic aerosol particle removal device for use at high wind speeds. The present invention includes a precharge stage device, a collection stage device, and a shell device. The present invention improves the precharge stage device by adding a grounding electrode while limiting the overall length to 400 mm, thereby increasing the minimum value of the space charge density, improving the distribution of the space charge, increasing the particle charge, and enhancing the dust removal efficiency of the two-stage electrostatic at a wind speed of 5 m / s. In summary, the present invention ensures that the two-stage electrostatic precipitator has a small volume while improving its dust removal efficiency at a wind speed of 5 m / s.

The present invention discloses a method for preparing a porous iron-based lithium supplement, comprising dissolving a ferrous source in deoxygenated deionized water to prepare a mixed solution; adding an alkaline solution to the mixed solution to adjust the pH value; continuously stirring until the precipitated particles reach a specified particle size, then adding a surfactant and continuing stirring; filtering and vacuum drying the precipitate to obtain a porous ferrous hydroxide precursor; placing the ferrous hydroxide precursor, a lithium source, and a carbon source in a high-speed mixer in proportion and mixing them evenly to obtain a mixture; placing the mixture in a box-type atmosphere furnace and passing an inert atmosphere for step-by-step sintering to obtain a porous lithium supplement. The Li5FeO4 porous lithium supplement prepared by the preparation method of the present application has a large specific surface area, and applying it to the positive electrode of a battery can greatly increase the charging capacity of the battery.

The application discloses an ITO-free vertical partition flexible stretchable dimming film and a preparation method thereof, and belongs to the technical field of dimming films.The dimming film comprises a flexible transparent substrate, a patterned silver nanowire / organic polymer composite electrode layer and an electrochromic functional layer; the composite electrode layer is divided into 8-12 vertical partitions, each partition comprises a working electrode area and a counter electrode area which are insulated from each other, and all electrode leads are gathered at the lower edge of the film; an insulating isolation groove penetrating through the composite electrode layer and the electrochromic functional layer is arranged between adjacent partitions.The application replaces the traditional ITO electrode with an organic composite electrode, eliminates the ion horizontal crosstalk between partitions through a physical isolation groove, and combines a short-time overdrive pulse, a constant-current coulomb meter control and a constant-voltage maintenance driving strategy, so that the device has the flexibility, the stretchability, the high-precision independent partition control ability and the long cycle stability while maintaining the high transmittance and the low haze.

The invention belongs to the technical field of new energy batteries, and particularly relates to a lithium iron phosphate material capable of reducing charging polarization and a preparation method and application thereof. The lithium iron phosphate material is sphere-like lithium iron phosphate particles doped with a Ti element, the doping amount of the Ti element is 2000-6000 ppm, and the D50 of the sphere-like lithium iron phosphate particles is 0.7-0.9 [mu] m. Starting from the structure and composition of the material, the micro-macro structure of the lithium iron phosphate material is optimized and adjusted through dual combination of particle size regulation and metal doping, the compaction density of the material is ensured while the dynamic performance of the material is improved, the polarization degree of the material in the constant-power charging process is reduced, and the gram capacity of the material is improved; and the energy density of the battery is improved. The problem that during constant-power charging, the polarization of the charging tail end is large, and the battery cannot be fully charged, so that the discharging capacity is low is solved.

Disclosed is a positive electrode active material for improving the performance of an electrochemical device. The positive electrode active material comprises an overlithiated layered oxide (OLO), and has an R value (defined by Formula (1) R = (P A / P B ) of not more than 27. According to small-angle X-ray scattering analysis, in Formula (1), P A is the volume (cm 3 / g) of macro pores contained in the positive electrode active material, P B is the volume (cm 3 / g) of micro pores contained in the positive electrode active material, the macro pores have a maximum volume fraction in the pore radius range of 2 to 50 nm, and the micro pores have a maximum volume fraction in the pore radius range of 0.5 to 2 nm.

The application provides modified graphene and a preparation method and application thereof, the modified graphene has a structure shown in formula (I): wherein R1 is selected from any one of benzene, naphthalene, anthracene, phenanthrene, perylene, naphthacene, pyrene groups; R2 and R3 are each independently any one of H, -CH3 and -CH2CH3; m is 0, 1, 2, 3 or 4; n is 0, 1 or 2; the modified graphene provided by the application enables the carbon-coated aluminum foil to have the function of sodium storage, and can reduce the contact resistance of the carbon-coated aluminum foil and the positive electrode material, improve the peeling strength of the carbon-coated aluminum foil and the positive electrode material, and improve the battery charging capacity and cycle life.

Provided are a negative electrode for an all-solid-state secondary battery with a low resistance value, and an all-solid-state secondary battery in which the negative electrode is used. The present invention is associated with Goals 3, 7, 11, and 12 of Sustainable Development Goals (SDGs). A negative electrode for an all-solid-state secondary battery according to the present invention includes a molded body made of a negative-electrode mixture containing a solid electrolyte and a negative-electrode material that contains a negative-electrode active material. The negative-electrode material contains a carbon material as the negative-electrode active material, and an argyrodite-type sulfide-based solid electrolyte is contained as the solid electrolyte. An A / B value is 0.1 or more and 0.8 or less where a percentage of the area of the carbon material to the area of a surface of the molded body is A(%) and a percentage of the area of the carbon material to the area of a cross-section of the molded body is B(%). Also, an all-solid-state secondary battery according to the present invention includes: a positive electrode; a negative electrode; and a solid electrolyte layer located between the positive electrode and the negative electrode, in which the all-solid-state secondary battery includes the negative electrode for an all-solid-state secondary battery according to the present invention as the negative electrode.

The utility model discloses an electric vehicle storage battery charging and heating device which comprises a heating module, a temperature sensor arrangement module, an electric energy transmission module, a front heating device plate and a rear heating device plate. The device comprises a lower heating device plate, a peripheral temperature sensor, a central temperature sensor, a motor controller, a power supply plug, a central support, a wire, a temperature control valve, an annular heating ring and a central heating module. The temperature sensor and the motor controller monitor the environment temperature of the storage battery when an electric vehicle user begins to charge, and heat the storage battery during charging, so that the optimal activity temperature of the storage battery is achieved, the charging capacity of the storage battery is improved, and the service life of the electric vehicle is prolonged.

The present invention provides a powder particle stratified fluidized collision charging device, method and charged powder particles, including a disturbance mechanism, a charged screening mechanism and a feeding structure; the disturbance mechanism is used to provide a disturbed airflow to the charged screening mechanism; the fixed screen plate is arranged near the bottom of the friction charging cylinder; the blocking screen plate is arranged at the center of the friction charging cylinder; the outlet pipe is located at the top of the friction charging cylinder; the fixed screen plate, the blocking screen plate and the friction charging cylinder constitute a first screening chamber, which is used to crush and disperse the powder particles to form small-sized charged powder particles; the blocking screen plate and the top plate of the friction charging cylinder constitute a second screening chamber, which is used to complete the second charging of the small-sized charged powder particles entering therein and escape from the outlet pipe. The device of the present invention uses fluidized stratification and airflow disturbance to perform friction collision charging on the powder particles, which can enhance the friction charging effect of the powder particles and achieve stable charging of the powder particles.

The present invention discloses a large-capacity centralized charging cabinet and a method for using the same, belonging to the field of charging technology, including a box: a main control board is connected to the rear end of the inner wall of the box; a horizontal fixed plate for support is connected to the inner wall of the box at equal intervals; a pull-out multi-station charging assembly that can be pulled outward to take and place intercoms and intercom batteries, can automatically return to position, and is adjustable and suitable for intercom batteries of different thicknesses is connected to the horizontal fixed plate at equal intervals; the pull-out multi-station charging assembly includes a reset support assembly, a multi-station charging assembly, and an adjustable intercom battery limiting assembly, the reset support assembly is arranged on the horizontal fixed plate at equal intervals, the top of the reset support assembly is connected to a multi-station charging assembly, and the multi-station charging assembly is provided with an adjustable intercom battery limiting assembly for intercom battery limiting. In the above manner, the present invention is suitable for charging intercom batteries of different thicknesses; the overall charging capacity is greatly improved, which is conducive to batch charging.

The application provides an electrolyte, a preparation method and application thereof, the electrolyte comprises an organic solvent, a lithium salt, an interface additive and a fluorine-containing diluent; the interface additive comprises a boric acid bis-sulfolactone compound; the boric acid bis-sulfolactone compound has a structure shown in formula I; in the application, the electrolyte is compounded by selecting a specific structure of the interface additive and the fluorine-containing diluent, so that the electrolyte has high conductivity, forms a unique high-voltage-resistant fast-charging electrolyte system, improves the high-voltage resistance and cycle performance of the battery, has higher charging capacity under the same condition, and has good fast-charging performance.

The invention discloses a light storage and charging integrated cabin which comprises a light storage and charging integrated cabin body, a photovoltaic subsystem is laid on the top of the light storage and charging integrated cabin body, and a lithium battery energy storage subsystem, an alternating current power distribution cabinet, an energy management system and a temperature control fire are arranged in the light storage and charging integrated cabin body. The photovoltaic subsystem component is used for absorbing and utilizing solar energy to carry out photoelectric conversion; the lithium battery energy storage subsystem is used for electric energy generated by the lithium battery energy storage subsystem and electric energy obtained from a power grid; the alternating-current power distribution cabinet serves as a center for power distribution and control and is used for distributing the power in the lithium battery energy storage subsystem to various types of electric equipment; the energy management system belongs to a master control center and is used for controlling the photovoltaic subsystem, the energy storage subsystem, the power distribution cabinet and the charging pile to work cooperatively and establishing an objective function for operation optimization of the photovoltaic storage and charging integrated cabin according to predicted photovoltaic output and corresponding electric vehicle charging data. And continuous energy configuration optimization in the operation process of the light storage and charging integrated cabin is facilitated.