642 results about "Discharge efficiency" patented technology

The invention relates to a photovoltaic power grid energy storage optimization regulation and control method based on multi-scale prediction. The method comprises the following steps: A1, obtaining historical power generation data, real-time meteorological data and numerical weather forecast of a photovoltaic power station; a2, generating a multi-time-scale photovoltaic output prediction sequence; a3, establishing an energy storage dynamic model of charge and discharge efficiency, capacity attenuation and operation constraint; a4, generating an energy storage charging and discharging demand curve under different time scales; a5, constructing a multi-time scale coupled optimization model by taking power grid operation cost minimization and renewable energy consumption maximization as targets; a6, updating an energy storage scheduling instruction in a rolling manner based on latest prediction data by adopting a model prediction control framework; a7, monitoring the deviation between the actual photovoltaic output and the power grid load, and dynamically adjusting the energy storage charging and discharging power; and A8, correcting a prediction error through Kalman filtering and a closed-loop feedback mechanism. According to the invention, high-efficiency operation can be realized, and power grid cost minimization and renewable energy consumption maximization can be realized.

The invention relates to the technical field of battery positive electrode materials, and provides a lithium iron phosphate positive electrode material and a preparation method thereof. The lithium iron phosphate positive electrode material has the characteristic of high energy density, the proportion of iron phosphide impurities in the total mass of the lithium iron phosphate positive electrode material is 0.001-0.008 PPM, the compaction density under the pressure of 3T is 2.68-2.8 g / cm < 3 >, the powder resistivity is 8-15 omega.cm, the 0.1 C discharge capacity is 161-163 mAh / g, the 0.1 C charge-discharge efficiency is 98.5-100%, and the 1C discharge capacity is 145-148 mAh / g. The preparation process is simple and safe, low in cost and high in stability. The content of iron phosphide impurities in a final lithium iron phosphate product can be regulated and controlled by regulating and controlling the phosphorus-iron ratio of the iron phosphate precursor and the ratio of the carbon source to the iron phosphate precursor in two-time burdening and controlling the sintering temperature in cooperation with secondary sintering, and the high-energy-density lithium iron phosphate positive electrode material is obtained.

The invention provides a communication master control system based on intelligent power supply, and relates to the technical field of communication, and the system comprises a power supply monitoring module which is used for monitoring the commercial power supply state of a communication base station, and automatically controlling a power switching circuit to switch a power supply mode to a standby battery power supply mode when the commercial power interruption is detected; the state acquisition module is used for acquiring the charge state, the discharge efficiency and the health state data of the standby battery in real time in a standby battery power supply mode, and acquiring the residual capacity, the actual discharge capacity and the life index of the battery; and the load receiving module is used for uploading the residual capacity, the actual discharge capacity and the life index of the battery to the communication main control unit, and receiving load data in the current communication network at the same time. According to the invention, intelligent scheduling of power utilization is realized, and the power supply reliability and stability of the communication system are improved.

The invention discloses an island microgrid distributed energy storage locating and sizing method and device based on data driving. The method comprises the following steps: acquiring a power generation power prediction value of each photovoltaic unit and a load power prediction value of each load node; determining the island power supply gap, the full life cycle cost and the energy storage charge and discharge efficiency of the micro-grid; giving out constraint conditions of operation of the micro-grid; constructing an island micro-grid simulation model based on the constraint condition of micro-grid operation; constructing a multi-objective optimization function based on the island power supply gap, the full life cycle cost and the energy storage charge and discharge efficiency of the micro-grid; and in combination with the analysis of the island microgrid simulation model and the multi-objective optimization function, giving the site selection and capacity of each energy storage unit to be configured. According to the method, a source-load uncertainty rule and time-space correlation characteristics are directly learned from historical data, distributed energy storage locating and sizing are guided, actual operation characteristics of an island microgrid are accurately matched, and reasonable configuration of an energy storage unit is achieved.

The invention relates to the field of positive electrode materials, in particular to a graphene reinforced lithium iron phosphate material and a preparation method and application thereof. According to the positive electrode material, europium ions are doped into lithium iron phosphate, the europium ions are large in radius, a larger migration channel is provided for lithium ions, meanwhile, the binding energy of the lithium ions can be reduced, the surface of the europium-doped lithium iron phosphate is coated with carbonized hydroxyethyl methyl cellulose grafted graphene, the hydroxyethyl methyl cellulose reduces the agglomeration phenomenon of the graphene, and the conductivity of the lithium iron phosphate is improved. After carbonization, a 3D conductive carbon network is jointly formed with graphene, so that the electronic conductivity is enhanced; the positive electrode material has the advantages of long cycle life, high charge-discharge efficiency, high conductivity and high cycle stability, provides a good energy storage basis for batteries, and is suitable for the fields of power batteries and energy storage.

The invention discloses a cylindrical battery and a battery pack. The cylindrical battery comprises: a housing having an opening formed at one end in the axial direction thereof; the electrode assembly is arranged in the shell; the cover plate is installed on the opening in a sealed mode, and the cover plate comprises a first weak structure; the switching piece is arranged between the electrode assembly and the cover plate, the switching piece comprises a first switching part and a second switching part, the first switching part is electrically connected with a tab of the electrode assembly, and the second switching part is fixed and electrically connected with the shell; a second weak structure is arranged on the first adapter part; the calculation formula of the radius R of the second weak structure is shown in the specification. The final position of the second weak structure is determined through a calculation formula, at least part of the second weak structure does not fall into the area where the pressure relief part is located after deformation, then the second weak structure is supported by the edge of the fixing part so as to be prone to deformation, and therefore the beneficial technical effects of improving safe pressure relief and discharging efficiency and stability of the anti-explosion valve are achieved.

The invention discloses a manganese iron oxalate precursor, a lithium manganese iron phosphate material and a preparation method and application of the manganese iron oxalate precursor and the lithium manganese iron phosphate material, and belongs to the technical field of battery materials. The lithium manganese iron phosphate material core layer is prepared by taking the oxalate manganese iron precursor with a specific particle size range, particle size distribution uniformity and a specific structure as a raw material, and meanwhile, the shell layer comprising the ionic conductive agent and carbon is introduced outside the core layer, so that the comprehensive performance of the lithium manganese iron phosphate material can be effectively improved; and thus, the capacity, the cycle performance and the first charge-discharge efficiency of the prepared corresponding secondary battery are improved.

The invention discloses a power distribution network voltage regulation and control method fusing energy storage thermal management load, and the method comprises the steps: carrying out the analysis of an energy storage power station at different environment temperatures, quantifying the influence of different environment temperatures on the operation performance of the energy storage power station, and determining the optimal working temperature interval of the energy storage power station; analyzing an internal heat energy source of the energy storage power station, and constructing an energy storage power station heat management model based on a heat management load based on the optimal working temperature interval of the energy storage power station; based on the thermal management model of the energy storage power station, taking minimization of total operation cost as a target function, and constructing a power distribution network voltage comprehensive regulation and control model fusing the thermal management model of the energy storage power station and multi-device coordinated regulation and control; and solving the comprehensive voltage regulation and control model of the power distribution network, obtaining an optimal voltage regulation and control strategy, and realizing voltage regulation and control of the power distribution network. According to the invention, the optimal working temperature of the battery can be ensured under extreme climate (such as high temperature or low temperature), so that the charge-discharge efficiency and charge-discharge performance of energy storage equipment are improved.

The invention discloses a novel electric power-oriented energy storage double-layer optimization configuration method and system, and the method comprises the steps: S1, constructing an energy storage system model, defining the static parameters of energy storage, including rated capacity, rated power, charge and discharge efficiency, initial charge state and the like, and further quantifying the supporting capability of energy storage for the dynamic stability of the system, therefore, the enhancement effect of energy storage on frequency stability and small interference stability is directly reflected. According to the method, the system dynamic stability index, the green energy consumption index and the market economic index are uniformly incorporated into an energy storage optimization configuration framework, so that the limitation of single target of a traditional method is overcome, and a key technical support is provided for constructing a safe, green and economic novel power system; secondly, market price and risk constraints based on probability prediction are introduced into a lower-layer operation model, so that an energy storage operation strategy obtained through optimization can effectively cope with market fluctuation, the stability of earnings is guaranteed while high earnings are pursued, and the anti-risk capability of investment decision making is enhanced.

The invention belongs to the technical field of batteries, and discloses an explosion-proof shell for a battery, a shell and the battery. According to the explosion-proof shell, the explosion-proof groove is formed in the outer surface of the bottom wall of the explosion-proof shell, the launching grooves in the explosion-proof groove surround the peripheral side of the center groove and are communicated with the center groove, and the launching grooves extend from the direction where the center groove is located to the edge direction of the bottom wall, so that the bottom wall of the explosion-proof shell can be stressed uniformly; and the area of the explosion-proof groove can be increased to a certain extent, and the discharge efficiency of gas in the battery is improved. The value of the thickness Tx of the bottom wall at the explosion-proof groove at least has a continuously changing value interval and / or a discontinuously changing value interval, and when the internal pressure of the battery is rapidly increased, the bottom wall is preferentially broken at an area corresponding to the minimum value of the Tx to form a pressure relief opening; and the parts connected with the regions are sequentially expanded under the impact action of the gas, so that the opening area of the pressure relief opening is gradually increased, the gas discharge efficiency is improved, and the safety of the battery is improved.

The invention relates to a lead-acid battery negative electrode additive as well as a preparation method and application thereof, and belongs to the technical field of lead-acid storage batteries. The additive consists of sulfonated modified lignosulfonate (component A), a graphene oxide-carbon nanotube hybrid conductive agent (component B) and a mixture of modified humic acid and boric acid (component C) which are respectively used as a crystallization template agent, a conductive network construction agent and an interface film forming regulator. During preparation, a component A is prepared through a sulfomethylation reaction, a component B is prepared through ultrasonic mixing of graphene oxide and a carbon nanotube dispersion liquid, a component C is prepared after humic acid is subjected to acid pickling purification and oxidation treatment and then mixed with boric acid, and finally the three components are mixed to obtain a finished product. The additive is added into the negative electrode lead paste, can inhibit negative electrode sulfation, improve electrode conductivity, reduce hydrogen evolution side reaction and prolong the cycle life and charge-discharge efficiency of the battery, and is suitable for production of various lead-acid batteries.

The invention relates to the technical field of peak regulation control of a power system, and discloses a 660MW thermal power generating unit rapid start-stop peak regulation cooperative control system, which comprises a power demand generation unit, a data acquisition module and a disassembly module, the data acquisition module acquires historical power consumption, real-time power consumption trend, rated output and minimum stable load of a thermal power generating unit, rated capacity of the energy storage module and charging and discharging efficiency data; the disassembly module is based on the collected data. According to the 660MW thermal power generating unit rapid start-stop peak shaving cooperative control system, a time-phased linear power generation plan is generated through a power demand generation unit, an execution monitoring unit collects operation data in real time and dynamically adjusts the collection frequency, a deviation analysis unit carries out deviation verification and instruction generation, and a tail end energy storage leak repairing calibration unit realizes electric quantity difference compensation. The method has the advantages of improving peak regulation efficiency, guaranteeing equipment safety and maintaining supply and demand balance.

The invention discloses a porous carbon material, a preparation method thereof and a silicon-carbon composite material, and relates to the technical field of battery materials. The method disclosed by the invention is simple in process and suitable for large-scale industrial production, the prepared porous carbon material has optimized pore size distribution and pore structure, more silane adsorption sites and stronger adsorption capacity, can accommodate more silicon and has excellent conductivity, and when the porous carbon material is used for preparing a silicon-carbon composite material, the silicon-carbon composite material can be used for preparing the silicon-carbon composite material. And the capacity, the charge-discharge efficiency, the rate capability and the cycle performance of the battery can be effectively improved.

The invention is suitable for the technical field of unmanned aerial vehicle energy consumption management and intelligent control, and provides an unmanned aerial vehicle logistics transportation intelligent management platform fusing multi-source data, and the platform comprises a flux regulation and control module which is used for predicting the gas release flux in an unmanned aerial vehicle cabin in unit time, and dynamically adjusting the ventilation flow rate of a ventilation system according to the gas release flux, the gas concentration in the cabin is maintained to be in a gas concentration steady-state interval corresponding to the heat balance optimal time period of the gas in the cabin. According to the technical scheme, the influence rule of the volatile pollutant micro-thermal effect on the energy efficiency of the unmanned aerial vehicle battery is disclosed, and the unmanned aerial vehicle battery continuously operates in the optimal energy efficiency state corresponding to the discharge efficiency peak value interval through real-time trend correction; therefore, the energy utilization rate and the flight stability of the unmanned aerial vehicle under the task of carrying the recycled objects are remarkably improved.

The invention discloses a graphitized silicon-carbon composite negative electrode material, a preparation method, a negative electrode plate and a battery, the graphitized silicon-carbon composite negative electrode material comprises a porous carbon substrate, silicon simple substance layers and carbon layers are alternately deposited in the pore structure of the porous carbon substrate, the number n of alternation is greater than or equal to 2, and the graphitization degree of the porous carbon substrate is greater than or equal to 60%. The graphitized silicon-carbon composite negative electrode material provided by the invention has a bulk phase and interface graphite lattice structure, provides a more regular diffusion channel for electrons and lithium ions, is beneficial to reducing diffusion resistance, remarkably improves the conductivity and ion conductivity of the material, and is beneficial to improving the rate capability and charge-discharge efficiency of a battery; wherein the graphitized carbon layered structure deposited in the pore structure of the porous carbon substrate is alternated with the silicon elementary substance layer, and the graphitized carbon layered structure has relatively high mechanical strength and stability, so that the volume expansion of silicon generated in the lithium intercalation and deintercalation process can be effectively buffered, the structural stability of the composite material is improved, and the cycle life of the battery is further prolonged.

The invention discloses a new energy station energy storage system charging and discharging optimization method based on multiple constraints, and relates to the field of new energy station energy storage system charging and discharging optimization, and the method comprises the steps: dividing the time interval of the day into a plurality of continuous time periods, carrying out the similarity matching of the meteorological data of each time period with the data under the historical similar meteorological conditions, corresponding actual power generation record data are screened out, and the actual power generation amount of each time period is calculated; when the deviation type is judged, the deviation is divided into three conditions of positive deviation, negative deviation and no deviation; constructing a priority dynamic adjustment mechanism, responding to time period electricity shortage early warning signals issued by a power grid dispatching mechanism in real time, and optimizing time period sorting by combining charging and discharging efficiency historical data of each time period of the energy storage system; and monitoring the deviation frequency of the daily actual transmission electric quantity and the planned electricity consumption in real time, and dynamically adjusting the subsequently declared planned electricity consumption according to the deviation frequency. And the accuracy of the power generation plan of the new energy station and the consumption capability of the power grid are improved.

The present application belongs to the technical field of polymer dielectric energy storage material, and discloses a preparation method of a full-organic small-molecule composite polymer film and a product. The preparation method comprises the following steps: mixing a mixed solution of PVDF and PMMA with a PE EU solution to form a pre-preparation solution; casting the pre-preparation solution on a substrate and heating and drying, and then heat treating in a vacuum environment to obtain the required composite polymer film. The present application also discloses the product prepared by the above preparation method. Through the present application, the problems of low discharge energy density and charge-discharge efficiency of ferroelectric-based polymer films are solved.

The invention discloses a preparation method of a moso bamboo derived hard carbon material and application of the moso bamboo derived hard carbon material in a sodium ion battery, and belongs to the technical field of new energy materials. Moso bamboo powder serves as a precursor, acid pickling pretreatment is conducted, then pre-carbonization is conducted at the temperature of 300-800 DEG C, secondary carbonization is conducted at the temperature of 1400-1500 DEG C after acid pickling purification, and the moso bamboo derived hard carbon material is obtained. And micropore closing and surface repairing are induced. By strictly limiting the technological process of low-temperature pre-carbonization, acid pickling and impurity removal and high-temperature reconstruction and hole closing, the contradiction that the biomass hard carbon material is large in specific surface area, low in first efficiency and insufficient in platform capacity is successfully solved. When being used as the negative electrode of the sodium ion battery, the composite material has the advantages of high reversible specific capacity (gt, 308mAh / g), high platform capacity ratio (gt, 53%) and high first charge-discharge efficiency (gt; the energy density and the cycling stability of the whole battery are remarkably improved, and a new way is provided for the development of a low-cost and high-performance sodium ion battery negative electrode material.

The invention discloses an electrostatic discharge device which comprises a feeding assembly and a discharge assembly, the feeding assembly is provided with an inclined surface, the inclined surface can make electronic components slide to at least one discharge position along the inclined surface by means of gravity, and the discharge assembly is arranged at the discharge position and used for conducting electrostatic discharge on the electronic components. According to the invention, the inclined surface of the feeding assembly automatically conveys the electronic components by using gravity, so that the problems of non-standard operation and high labor intensity caused by manual taking are eliminated, and each electronic component can be ensured to be in vertical contact with a discharge position; and the discharging assembly performs automatic discharging at the discharging position, so that mainboard component failure caused by incomplete manual discharging or leakage discharging is avoided. More specifically, the automatic process improves the discharge efficiency, reduces the operation time, and guarantees the discharge quality through a stable discharge point, thereby solving the problems of quality defects and low efficiency.

The invention discloses a lithium titanate battery, and relates to the technical field of batteries. The battery comprises a positive electrode, a negative electrode, an electrolyte and a diaphragm, and an addition product synthesized by dimethyl fumarate and benzidine according to a specific molar ratio is added into the electrolyte as a viscosity modifier, so that the viscosity increasing trend of the electrolyte at a low temperature is effectively reduced, and the migration rate of lithium ions is improved. And the electrolyte also comprises a lithium salt, an organic solvent and an auxiliary additive, so that the low-temperature performance and the cycling stability of the battery are favorably optimized. A positive active material is one or more of lithium iron phosphate, lithium manganate, lithium cobalt oxide or nickel manganese cobalt ternary materials, a negative active material is lithium titanate, and additives such as lithium nitrate and fluoroethylene carbonate are further combined, so that the capacity retention ratio and the charge-discharge efficiency of the battery in an extreme low-temperature environment of-40 DEG C are remarkably improved. The lithium titanate battery provided by the invention has excellent low-temperature adaptability, safety and long cycle life, and is applicable to power batteries and energy storage systems in alpine regions.

The invention discloses a lithium-manganese-rich high-rate-performance electrolyte and a preparation method and application thereof. The lithium-manganese-rich high-rate-performance electrolyte comprises a lithium salt, an organic solvent and an additive, the additive is 2, 3-bis (trifluoromethyl) propynyl sulfate. According to the electrolyte disclosed by the invention, a compact and uniform CEI film is formed on the surface of a positive electrode, electrolyte oxidation and metal ion dissolution are inhibited, the cycle stability of the battery is improved, the overall oxidation resistance is improved, three-dimensional positive and negative electrode film layers are formed during film forming, and the mechanical strength is improved; the first discharge efficiency and discharge capacity of the lithium ion battery can be obviously improved, the high-temperature cycle performance is also obviously improved, side reactions are prevented, dissolution of transition metal ions is inhibited, and the cycle stability is improved. According to the invention, the growth of lithium dendrites can be effectively inhibited, the battery safety is improved, the electrolyte impedance is reduced, the battery rate and high-low temperature performance are improved, the side reaction with the electrolyte is reduced, the dissolution of transition metal ions at the positive electrode side is inhibited, the gas production rate of the system is reduced, and the cycle life is prolonged.

The invention discloses an organic micromolecule modified polyethersulfone composite dielectric film and a preparation method and application thereof, and belongs to the technical field of functional polymer composite materials and preparation thereof. The problems that an existing PESU-based dielectric film is insufficient in energy storage density and low in charging and discharging efficiency are solved. According to the PESU-based dielectric film, PMDA is doped in a PESU substrate through a blending process, the stacking and polarization characteristics of polymer chain segments are improved on the molecular level by means of the doping of PMDA, and the charge-discharge efficiency, the energy storage density and the breakdown field strength of the PESU-based dielectric film are remarkably improved while the excellent mechanical property of the PESU substrate is kept. Test results show that the obtained composite film achieves energy density of 8.6 J / cm < 3 > and energy storage efficiency of 67.0% under the field intensity of 560 kV / mm.

The invention discloses a power battery performance evaluation method and system and a storage medium. The method comprises the following steps: acquiring multi-dimensional performance indexes such as cycle life attenuation rate, charge-discharge efficiency, rate capability retention rate and low-temperature capacity retention rate of a battery; standardizing each index, and automatically calculating the objective weight based on the information entropy of the index data so as to eliminate the subjective deviation of manually setting the weight; performing weighted summation on the standardized index values and the corresponding weights to obtain a comprehensive evaluation value of the battery performance; and finally dividing performance grades according to a preset threshold. The technical problems that a traditional evaluation method is single in dimension and subjective in weight are solved, comprehensive, objective and quantitative scientific evaluation of the performance of the power battery is achieved, and the accuracy of the evaluation result and the engineering practicability are remarkably improved.

The invention relates to the field of solid-state batteries, in particular to an electrolyte and a preparation method of an electrolytic copper foil for a solid-state battery. The electrolyte comprises the following components by concentration: 80 to 100 g / L of Cu < 2 + >, 105 to 120 g / L of sulfuric acid, 5 to 25 g / L of gelatin, 10 to 40 g / L of isothiourea propanesulfonic acid inner salt, 3 to 15 g / L of diethyl propyne amine, 5 to 35 g / L of (R)-4-benzyl thiazoline-2-thioketone, 10 to 30 mg / L of Cl <->, and the balance of water. By adopting a specific formula and process, the tensile strength of the prepared copper foil reaches 400-500MPa, the elongation is greater than or equal to 5.0%, the roughness Ra is greater than or equal to 0.45 mu m, the roughness Rz is greater than or equal to 2.50 mu m, and the specific surface area is greater than 0.36 m < 2 > / g; the problems that in the prior art, a copper foil is prone to deformation and breakage and high in interface impedance are solved, and therefore the charge-discharge efficiency and the cycle performance of the solid-state battery are improved.

The invention relates to a sodium ion battery starting power supply system with adaptive thermal management and energy recovery, and belongs to the technical field of vehicle starting power supplies. Comprising a main sodium ion battery module, an auxiliary sodium ion battery module, a central controller, a self-adaptive thermal management module, an energy recovery module, an intelligent switching module, a multi-path charging module and a BMS module, the BMS module is used for monitoring the voltage, temperature and current of a battery, controlling thermal management and triggering fault alarm, is bidirectionally and electrically connected with the main sodium-ion battery module, the auxiliary sodium-ion battery module and the self-adaptive thermal management module, and outputs a fault signal to the central processing unit; according to the invention, through active heating / heat dissipation of the self-adaptive heat management module, the sodium ion battery stably discharges in a range of-20 DEG C to 50 DEG C, the low-temperature discharge efficiency is greatly improved, and the high-temperature cycle life is remarkably prolonged; the braking / sliding kinetic energy recycling function is added, 5%-8% of energy can be recycled in single-time driving, the cruising ability of the vehicle is improved, and electric quantity waste is reduced.

The utility model relates to a battery cell separating device and a battery cell blanking system. The battery cell separating device is used for separating a battery cell from a supporting cup and comprises a holding assembly, an ejection assembly and a guide assembly. Wherein the holding assembly comprises a first holding piece; the ejection assembly is movably arranged on the side, close to the first holding piece, of the holding assembly in the first direction, and the ejection assembly comprises an ejection piece and a protrusion; the guide assembly is arranged on the side, close to the protrusion, of the ejection assembly in the second direction, a guide groove extending in the third direction is formed in the guide assembly, and the protrusion is arranged in the guide groove. According to the battery cell separating device, the guide assembly is arranged, the protrusion gradually gets close to the supporting cup in the first direction while moving in the guide groove in the third direction, finally the battery cell in the supporting cup is ejected out, the whole battery cell separating device is simple in structure and small in occupied area, and the discharging efficiency of the battery cell can be effectively improved.

The application discloses a Fe self-catalytic in-situ lithium supplementing and graphite carbon-coated lithium manganese iron phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of lithium batteries. 2+ Catalyze PAN to generate sp 2 Carbon, LiBOB-Li2O microcapsule in-situ lithium supplementing, and then ultra-high speed quenching to obtain the product. 2+ Self-catalysis, integration of carbon coating and in-situ lithium supplementing, greatly improving the conductivity, the first charge-discharge efficiency and the rate performance of the material, simple and controllable process, suitable for industrial production, and the prepared material has high compacted density and excellent cycle stability.

The utility model relates to the technical field of ton barrel discharging, and discloses a ton barrel discharging device which comprises a discharging three-way pipe, a loop connector is movably installed outside the discharging three-way pipe, a filtering mechanism is arranged on the back of the discharging three-way pipe, and a positioning mechanism is arranged at the bottom of the filtering mechanism. Through the arrangement of the positioning cover and the butt joint cover, the filter plate can be conveniently installed and sealed, under the cooperation of the filter plate, impurities of materials in the ton barrel can be conveniently filtered, sediments and the impurities are prevented from being discharged, the butt joint cover is rotated to be away from the positioning cover, the filter plate can be conveniently detached, and the butt joint cover can be conveniently detached. And through the arrangement of the first liquid discharging valve, the discharging path of the materials can be conveniently controlled, so that the impurities can be conveniently cleaned while the materials are discharged, and the discharging efficiency is guaranteed. And through the arranged connecting rod, the discharging three-way pipe and the discharging three-way pipe can be conveniently connected, and therefore the stability of the discharging three-way pipe is guaranteed.

This invention discloses a high-compact lithium iron phosphate (LFP) cathode material and its preparation method, specifically belonging to the field of lithium-ion battery technology. The preparation method of the high-compact LFP cathode material involves pre-reacting a lithium source, phosphorus source, iron source, and a cationic dispersant, followed by ball milling and blending with a suitable silane coupling agent and carbon source, and finally sintering to obtain the high-compact LFP cathode material. The obtained LFP cathode material exhibits excellent electrical performance indicators, showing superior performance in terms of compaction density, low-rate discharge specific capacity, initial charge-discharge efficiency, high-rate discharge specific capacity, and cycle stability. The preparation process of the LFP cathode material provided by this invention is simple and easy to implement, suitable for large-scale production. Furthermore, the selection and addition of suitable dispersants and carbon sources during preparation results in a synergistic optimization effect.

The utility model discloses a vibration shakeout device for casting production, which comprises an equipment shell, an equipment frame arranged on the inner side of the equipment shell, four base plates respectively arranged at four corners of the equipment shell, supporting upright posts connected with the base plates through spring structures, and reinforcing cross beams arranged on the inner side wall of the equipment shell, a reinforcing vertical beam is arranged on the outer side wall of the equipment shell, two symmetrically-distributed vibration motors are arranged on the outer side wall of the equipment shell, a feeding guide plate is arranged at the left end of the equipment frame, a discharging guide plate is arranged at the right end of the equipment frame, and the lower end of the discharging guide plate is connected with the equipment frame through a discharging supporting frame. According to the utility model, the functions of improving the discharging efficiency, reducing the damage degree of the surface of a casting and conveniently recovering and conveying molding sand are realized.