207results about How to "Avoid reaction" patented technology

The invention discloses a sun tracking method based on light spot contour detection, and relates to the technical field of light spot contour detection and tracking. According to the solar tracking method based on light spot contour detection, image data of a solar spot contour area are obtained and analyzed in real time, and a light spot position deviation index, a light spot shape distortion index, a light spot brightness uniformity index and a light spot contrast uniformity index of the solar spot contour area are obtained and comprehensively analyzed; the method comprises the steps of obtaining a light spot comprehensive deviation index of a solar light spot contour area, judging and analyzing the comprehensive deviation index of the solar light spot contour area and a preset deviation threshold range, and adjusting and analyzing sunlight receiving equipment when the comprehensive deviation index of the solar light spot contour area is out of the preset deviation threshold range. Through multi-dimensional comprehensive analysis on the solar facula, the deviation condition of the facula can be accurately evaluated, so that a tracking system can capture fine deviation in real time, and the tracking direction and amplitude are adjusted in time.

The invention provides a method for preparing high-purity lithium sulfide from lithium carbonate, and belongs to the technical field of lithium material preparation, and the method comprises the following steps: heating a ball-milled mixture of industrial-grade lithium carbonate and an alumina additive to 750-900 DEG C, and carrying out heat preservation and calcination to generate lithium oxide; performing hydrolysis reaction on lithium oxide in hot water, and filtering to obtain a high-purity lithium hydroxide solution; mixing the lithium hydroxide solution with the sulfur-containing protein, and performing spray drying to obtain a mixed precursor; calcining the mixed precursor at a low temperature of 210-340 DEG C in an inert atmosphere; and heating to 550-660 DEG C, calcining at a high temperature, introducing hydrogen sulfide gas, reacting lithium hydroxide to generate lithium sulfide, and cooling to obtain the high-purity lithium sulfide. The invention provides the method for preparing the high-purity lithium sulfide, the purity, the production efficiency and the raw material utilization rate of the lithium sulfide are remarkably improved, and the technical defects of low purity, incomplete raw material reaction, non-uniform precursor mixing, complicated process, difficulty in large-scale production and the like in the traditional lithium sulfide preparation method are overcome.

The invention relates to the field of DNA amplification, in particular to an intelligent molecular diagnosis and analysis method, device and equipment and a storage medium. The method comprises the following steps: detecting multi-dimensional environmental parameters of the DNA amplification kit in real time based on a multi-dimensional sensing node; performing spatial topology layout mining and environment amplification perception fitting on the multi-dimensional environment parameters, and constructing a real-time amplification perception model; identifying a DNA amplification sample; performing layered temperature control analysis on the DNA amplification sample, and performing dynamic amplification constant-temperature control on the real-time amplification perception model, so as to construct a plurality of dynamic constant-temperature amplification models; carrying out regional DNA reaction degree evaluation on the plurality of dynamic isothermal amplification models one by one, and then carrying out regional flow velocity dynamic regulation, so as to construct a dynamic amplification reaction flow velocity regulation strategy; real-time amplification control is performed based on a dynamic amplification reaction flow rate adjustment strategy to generate a filter optimized amplification reaction signal. According to the method, the accuracy of molecular diagnosis analysis is improved through efficient and convenient DNA isothermal amplification.

The invention provides a preparation method of spherical iron phosphate, and relates to the technical field of lithium ion batteries, and the preparation method comprises the following steps: S1, one-step reaction: carrying out parallel flow on an iron salt solution, a phosphorus salt solution and ammonia water according to a molar ratio of 1: (0.8-1.2): (0.8-1.1) to generate amorphous iron phosphate slurry; adding ammonia water into the iron phosphate slurry to adjust the pH value to 1.5-2.5; s2, membrane washing; s3, a second-step reaction: adding pure water into the washed iron phosphate slurry, adjusting the iron concentration to 0.5-1.2 mol / L, adding a phosphoric acid solution, heating to 90-120 DEG C, and controlling the heat preservation time for 30-90 minutes after the material is converted into a white material, so as to obtain white slurry; s4, washing: taking a filter cake; s5, drying: generating iron phosphate dihydrate; s6, calcining: spherical iron phosphate is generated, and the iron phosphate is successfully converted from a traditional olive type, peanut type or honeycomb type to a spherical type through the preparation method provided by the invention.

The invention discloses a preparation method and application of a sensor array based on luminous carbon dots, and relates to the technical field of sensors, the preparation method comprises the following steps: preparing a carbon source which comprises a precursor containing a targeting functional group or a biomolecule derived carbon source, preparing the luminous carbon dots through a chemical synthesis or physical method, modifying the surfaces of the carbon dots, and preparing the sensor array based on the luminous carbon dots. A core-shell structure is added on the surface of a carbon dot by using an in-situ growth method or a layer-by-layer self-assembly method, the carbon dot with the added core-shell structure is fixed on a substrate of a sensor array, and a performance test is carried out. By synthesizing the carbon dots with a targeted recognition function, the selectivity and the sensitivity of the sensor to a target substance can be remarkably improved, and in the synthesis process, the carbon dots can generate specific interaction with the target substance by adjusting factors such as the structure, the shape, the size and the surface chemical property of the carbon dots; therefore, accurate identification of the target substance is realized, and detection of the marker is realized.

The invention discloses a preparation method and application of active cationic chitosan nanoparticles, which comprises the following steps: reacting a low-molecular chitosan triethylamine hydrogen sulfate ionic liquid ([(C2H5) 3NH] HSO4) solution with an aldehyde compound ethanol solution to form Schiff base protection on chitosan C2-site amino, and then reacting with 2, 3, 5, 6-tetramethyl-4-piperidine-2-one to obtain the active cationic chitosan nanoparticles. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on chitosan C6 in the presence of a basic catalyst by using 2, 3-epoxypropyl trimethyl ammonium chloride, then adding a chemical initiator, carrying out grafting reaction on chitosan C3 and acrylic acid, and then removing Schiff base protection on chitosan C2. Carboxylate anions of acrylic acid and cations of chitosan are subjected to cross-linking self-assembly through a hydrothermal reaction, and the chitosan nanoparticles which are high in stability, small in particle size, uniform in distribution and efficient and lasting in function are obtained. The prepared nanoparticles are high in reaction activity, contain a large amount of quaternary ammonium salt, amino dication groups and carboxyl groups, and have wide application prospects in the fields of dye adsorption, heavy metal adsorption, textile function finishing and the like.

The invention provides a cooling control method and system of a transformer, and belongs to the field of transformer cooling control. The method comprises the steps that the state information of the transformer is obtained, and the state information comprises the winding current and the top oil temperature of the transformer; calculating a load rate and a hot-spot temperature of the transformer based on the state information; fuzzifying the load rate and the hot spot temperature to obtain a fuzzy set; establishing a fuzzy control rule; adjusting parameters of a PID controller by combining the fuzzy set and a fuzzy control rule; using the adjusted PID controller to output a control signal; and performing cooling control on the transformer according to the control signal. According to the invention, the cooling control efficiency and stability can be improved.

The invention relates to the technical field of live pig body size measurement, in particular to a non-contact pig body size estimation method and device based on a multi-position camera. The method comprises the following steps: firstly, acquiring back and side images of a pig through a multi-position camera, generating a standardized data set, then carrying out live pig attitude detection by utilizing an improved YOLOv11 model, screening out an image with an ideal attitude by introducing a deformable convolution and adaptive spatial feature fusion module, and carrying out real-time detection on the attitude of the live pig. Secondly, accurately positioning key point pixel coordinates related to the pig body size by using an HRNet key point positioning model, calibrating and correcting camera image distortion through internal and external parameters, calculating a conversion factor of pixels and actual size, and finally converting the pixel distance of the key points into actual body size data. According to the method, the multi-camera layout and the deep learning technology are combined, high-precision, automatic and stress-free pig body size measurement is realized in a complex breeding environment, and an efficient solution is provided for large-scale breeding and pig health management.

The application discloses a double-hearth two-stage heating vacuum distillation furnace, which comprises an evaporation furnace and a condensation furnace which are communicated through a gas passage, wherein the evaporation furnace comprises an evaporation furnace body and at least one top heating mechanism which is detachably arranged on the top of the evaporation furnace body; and the condensation furnace comprises a condensation furnace body, a side heating structure and a furnace cover, wherein the condensation furnace body is divided into a temperature control condensation chamber and a plurality of layers of multistage condensation chambers, and the gas passage can be combined or replaced according to the required reaction conditions of different materials. The vacuum distillation furnace can collect different metals through the gradient change of the temperature of the two hearths, reduces the process of secondary distillation of volatile matters after the furnace is stopped, can complete the processing of diversified raw materials, improves the work efficiency and reduces the processing cost; the modular top heating mode directly radiates heat to the materials, improves the heat utilization rate, can realize the working mode of stopping the furnace without stopping the work, helps to improve the work efficiency, and is convenient for completing the furnace cleaning, maintenance and solid material taking and placing.

The invention discloses oil exploitation sludge deep filtration treatment equipment, and relates to the technical field of oil exploitation equipment, the oil exploitation sludge deep filtration treatment equipment comprises a deep outer heating cylinder, the top of the deep outer heating cylinder is provided with a top cover, the bottom of the deep outer heating cylinder is provided with a bottom support, the deep outer heating cylinder is internally provided with a middle cylinder, the middle cylinder is internally sleeved with an inner filter cylinder, and the inner filter cylinder is internally provided with a spiral cone paddle; an upper connecting shaft penetrates through the middle part of the spiral cone paddle; according to the invention, premixing is carried out through an external mixing container, and free radical reaction is initiated at high temperature and high pressure by virtue of supercritical water, a strong oxidant and a chemical agent, so that the solvent sludge reaction time is remarkably shortened; the special structures of the heat-conducting sewage conveying pipe and the deep external heating cylinder are also utilized to realize efficient heat transfer, and the pH value and the temperature are flexibly adjusted according to reaction requirements; the driving motor drives the spiral cone paddle to stir, mixing is promoted, reaction is accelerated, internal circulation of the sludge is formed, the inner filter cylinder is driven by the servo motor to rotate, and solid-liquid separation is achieved through centrifugal force.

The invention discloses a high-performance, weather-resistant and yellowing-resistant polyurethane adhesive as well as a preparation method and application thereof. The high-performance, yellowing-resistant and weather-resistant polyurethane adhesive is prepared from the following raw materials in parts by weight: 10 parts of isocyanurate polyol, 18 to 32 parts of isocyanate, 198 to 689 parts of polymer polyol, 37 to 90 parts of polyisocyanate, 26 to 164 parts of plasticizer and 1.3 to 8.2 parts of catalyst. The isocyanate adopted by the invention is aliphatic and / or alicyclic isocyanate and a polymer thereof, no anti-yellowing agent or light stabilizer is added, the problem of yellowing of polyurethane can be thoroughly solved, the high-activity micromolecular isocyanurate polyol reacts with excessive isocyanate, and the yellowing resistance of the polyurethane is improved. Reacting the obtained isocyanate oligomer with excessive polymer polyol under the assistance of a small amount of catalyst, so that the isocyanate is completely reacted to obtain a hydroxyl-terminated polyurethane prepolymer; and reacting with excessive polyisocyanic acid to obtain the weather-resistant and yellowing-resistant polyurethane adhesive with a certain structure, and keeping excellent physical and mechanical properties at the same time.

The embodiment of the invention provides a preparation method of a grating structure, the grating structure and a near-to-eye display device. The method comprises the steps that an isolation layer is formed on the surface of a grating layer, and the grating layer is provided with a to-be-thinned area; forming a mask layer on the surface, deviating from the grating layer, of the isolation layer, wherein the mask layer is provided with a pattern area; etching positions, corresponding to the pattern area, of the isolation layer and the area to be thinned; and removing the mask layer and the isolation layer. According to the technical scheme, reaction or dissolution between the mask layer and the grating layer is prevented, and damage to the structure of the grating layer is avoided.

The invention relates to the technical field of sodium ion battery positive electrode materials, in particular to a modified layered positive electrode material, a preparation method thereof and a sodium ion battery containing the modified layered positive electrode material. The Fe element in the NaNi1 / 3Fe1 / 3Mn1 / 3O2 material is partially replaced by the Y element, so that the structural stability of the material is improved, and the cycle performance of the O3 type layered positive electrode material is effectively improved; meanwhile, the surface of the O3 type layered positive electrode material is coated with a Na2TiO3 layer, so that doping of the NaNi < 1 / 3 > Fe < 1 / 3-x > Mn < 1 / 3 > Y < x > O < 2 > material by a titanium element is realized, the NaNi < 1 / 3 > Fe < 1 / 3-x > Mn < 1 / 3 > Y < x > O < 2 > material can be isolated from air, the NaNi < 1 / 3 > Fe < 1 / 3-x > Mn < 1 / 3 > Y < x > O < 2 > material is prevented from reacting with moisture and carbon dioxide in the air, and the problem that the material cannot be stored for a long time in the air is effectively improved.

The application discloses a controllable breathing machine atomization processing circuit, which comprises a main control module, a display module, a carbon dioxide concentration detection module, a pressure detection module, a judgment module, an atomization output control module and an oscillation driving module; wherein the main control module is connected with the display module, the judgment module, the carbon dioxide concentration detection module and the pressure detection module respectively; the display module, the carbon dioxide concentration detection module and the pressure detection module are connected with the judgment module respectively; the judgment module is connected with the atomization output control module; and the atomization output control module is connected with the oscillation driving module. Through the cooperation of the main control module, the carbon dioxide detection module and the pressure detection module, the breathing frequency data of a patient can be accurately collected and fed back in real time; and through the atomization output control module and the input oscillation driving module, the vibration frequency of the atomization screen is regulated and controlled, so that the atomization screen can better adapt to the breathing frequency of the patient.

The application discloses a method for preparing cell-derived exosomes and products and applications thereof, and the method comprises the following steps: co-culturing immune-activated programmable cells with a stimulating agent with immune-activation effect, and collecting the cell-derived exosomes with immune activity by a natural secretion collection method or an artificial extrusion collection method. The application has safe and controllable local immune activation, and the immune activation strategy based on the exosomes fully overcomes the safety bottleneck of traditional live bacterial preparations in tumor treatment. By replacing live bacteria with engineered exosomes, not only potential risks such as systemic inflammatory response and infection are effectively avoided, but also the local controllability of immune stimulation signals is ensured, the precise activation and directional regulation of tumor region immune cells are realized, the tumor microenvironment is reshaped, the anti-tumor effect is strengthened, and the broad-spectrum cross-tumor potential is verified across models.

The present invention relates to the technical field of fine chemicals, and in particular to a method and a reaction device for online control of the molecular weight of a polyphenylene ether product. The method for preparing polyphenylene ether of the present invention comprises the following steps: 1) adding oxygen and phenolic monomers to a reactor containing a solvent and a catalyst for reaction; 2) calculating the average molecular weight of the polyphenylene ether product in the reaction solution described in step 1) according to the relationship between viscosity, temperature, pressure or material concentration and the average molecular weight of the polyphenylene ether product, and when the average molecular weight of the polyphenylene ether product reaches the target molecular weight, adding a quencher to terminate the reaction, and performing post-treatment to obtain polyphenylene ether. In the production process of polyphenylene ether, the present invention monitors data such as viscosity, temperature, material concentration and pressure, calculates the molecular weight of the product in real time, and judges the reaction end point according to the calculation result, thereby realizing precise control of the reaction process and ensuring the stability of production and consistency of product quality.

The application provides a preparation method of a diphenylfluorene polyether. The method uses diphenylfluorene as a substrate, butylene oxide as an epoxide monomer, toluene as an organic solvent, and under the action of a composite catalyst, reacts at 110-200 DEG C for 2-6 hours to obtain the diphenylfluorene polyether. The composite catalyst is obtained by reacting a porous aromatic skeleton with a bromoalkyl quaternary ammonium salt to obtain a quaternary ammonium salt functionalized porous aromatic skeleton, and finally, a basic catalyst is limitedly encapsulated in the pore channel of the quaternary ammonium salt functionalized porous aromatic skeleton by electrostatic attraction. The catalyst of the method can be recycled and reused, and the yield retention rate is greater than or equal to 92% after the composite catalyst is used for 5 cycles, and the method is suitable for optical display, high-frequency circuit board, semiconductor packaging and other fields.

The utility model discloses an ammonium nitrate solution concentration blending reation kettle with anti -explosion function belongs to reation kettle equipment technical field, the utility model discloses a reation kettle body is communicated with the discharge valve at reation kettle body bottom, can carry out even heating to solution through the electric heating plate in the reation kettle body inner wall bottom groove, avoid local temperature too high and cause ammonium nitrate to decompose gas and cause explosion, the cooperation design of stirring rod and top motor can carry out sufficient stirring to ammonium nitrate solution in reation kettle, make solution concentration distribution even. The annular ring and the explosion -proof pipe fixedly connected with the annular ring that reation kettle body surface sets up up and down, effectively enhanced the overall structural strength of reation kettle, the gas outlet pipe of top annular ring and the gas inlet pipe of bottom annular ring mutually cooperate, and the outside cold gas enters the space between the explosion -proof pipe and reation kettle body, and then even cooling is carried out to reation kettle body, and then gas is discharged to the outside from the gas outlet pipe, and the device has the advantages that the explosion -proof effect is good.

The invention discloses a rare earth lubricated high-speed train brake pad and a preparation method thereof. The train brake pad comprises iron and copper mixed powder, flake graphite and granular graphite mixed powder, molybdenum disulfide, alumina fibers, high-carbon ferrochrome powder, chromium powder and rare earth element powder. The prepared high-speed train brake pad is prepared through the processes of powder mixing, cold pressing forming and hot pressing sintering. The high-speed train brake pad has the outstanding advantages that the cost of raw material powder is low; the problem of dispersity caused by nano powder is avoided, the sintering densification process is also promoted by adding rare earth elements, the whole preparation process of the brake pad material is relatively simple, and large-scale production is easy; through the collaborative design of chromium and rare earth elements, the brake lining material has the capacity of self-adaptive adjustment along with the change of braking conditions. The iron-copper-based brake pad prepared through the method can be well matched with a carbon-ceramic brake disc at the speed of 400 km / h or above, and stable and high friction coefficient and wear resistance are achieved.

This invention belongs to the field of glass technology and relates to a high-temperature resistant structural glass material, its preparation method, and its applications. The glass is composed of the following components by mass percentage: 60%-70% silicon dioxide, 5.5%-11% boric acid, 0.1%-5% aluminum hydroxide, 0%-3% potassium nitrate, 5.5%-13% potassium carbonate, 0%-12% sodium carbonate, 0.1%-4% calcium carbonate, 0%-2% calcium fluoride, 0%-1% lithium carbonate, 0%-2% basic magnesium carbonate, 0.1%-1% titanium dioxide, 0%-2% zirconium dioxide, and 0%-1% cerium dioxide; the total mass percentage of potassium nitrate, potassium carbonate, sodium carbonate, and lithium carbonate does not exceed 22%. This structural glass possesses a high softening temperature, a suitable coefficient of thermal expansion, high-temperature resistance, thermal shock resistance, and processing performance, making it suitable as a structural material for optoelectronic devices.

A kind of vocal cord repair device based on advanced biological printing technology assisted, comprising: imaging positioning component, including endoscope imaging module and three-dimensional reconstruction processor;Surgical operating component, including glottis exposure mechanism and elephant trunk type flexible mechanical arm, glottis exposure mechanism exposes glottis to provide field of view, and mechanical arm high-precision operation;Biological repair component, including micro printing head, compatible hydrogel, injection tube and motion control mechanism, realize vocal cord reconstruction and function recovery.Integrate biological printing component and imaging positioning component, system can accurately obtain the three-dimensional structure data of vocal cord damage area, and realize the millimeter level accurate deposition of biological material, so that the millimeter level precision of imaging positioning, micron level operation of mechanical arm and controllable printing of biological material form closed loop feedback system, improve the overall success rate of vocal cord repair, realize the leap of vocal cord repair from "empirical operation" to "precision engineering", provide safer and more effective treatment options for patients with vocal cord dysfunction.

The utility model relates to a reaction device, and particularly discloses a photocatalytic reduction CO2 reaction device which comprises a water tank, a light source emitter and a heating seat, a heating cylinder is arranged at the upper end of the heating seat, a reaction container is arranged at the upper end of the water tank, a first flow guide pipe and a second flow guide pipe are arranged between the heating seat and the reaction container, and a support is arranged in the reaction container. A catalyst cylinder is arranged at the upper end of the support, and spiral blades are arranged on the outer side of the catalyst cylinder, fixedly connected with the catalyst cylinder and arranged on one side of the first flow guide pipe and one side of the second flow guide pipe. Carbon dioxide and water vapor are input into the reaction container through the two flow guide pipes, and the carbon dioxide and the water vapor entering the reaction container spirally flow along the surfaces of the spiral blade and the catalyst cylinder under the guidance of the spiral blade, so that the carbon dioxide can be in full contact with the water vapor, and the carbon dioxide can fully react with the catalyst cylinder; and the reaction efficiency of the photocatalytic reduction CO2 reaction device is improved.

This invention provides a method for recovering and utilizing distillation residue after solvent removal from homohydric anhydride, relating to the field of fine chemical technology. The method includes anhydride treatment, vaporization and sublimation, dissolution and recrystallization, distillation, and water washing. In this invention, the distillation residue is anhydride-treated under high temperature and negative pressure, followed by vaporization and sublimation under vacuum to separate mechanical impurities and high-boiling substances. Then, through dissolution and recrystallization, the difference in solubility between homohydric anhydride and metahydric anhydride in polar solvents is utilized to preferentially crystallize out the homohydric anhydride. The mother liquor is distilled to remove the solvent, and then colored impurities are removed by hot water washing and activated carbon adsorption. Finally, it is cooled and crystallized to obtain trimellitic acid. The homohydric anhydride obtained by this invention has a purity ≥95% and a yield of 84-89%, and the trimellitic acid has a purity ≥97% and a yield of 81-86%. This method achieves effective recovery of high-value-added components from distillation residue, demonstrating significant economic and environmental benefits and promising application prospects.

The application discloses a PCB oxidation-preventing treatment device, and relates to the oxidation-preventing treatment field of pretreatment plates, which comprises a main frame body, a spraying box body is arranged on the upper surface of the main frame body, and a micro-etching mechanism is arranged on the upper surface of the main frame body. The micro-etching mechanism comprises a cleaning assembly and a soaking assembly. The cleaning assembly comprises a sliding table body, the sliding table body is arranged on the upper surface of the main frame body, one side surface of the sliding table body is further provided with a sliding groove, one side of the inside of the sliding groove is provided with a bottom protruding block, and the inside of the sliding groove is provided with a limiting sleeve block. The soaking assembly comprises a vertical sliding rail, the bottom surface of the vertical sliding rail is connected with one side surface of a liquid pool bottom plate, and the inside of the vertical sliding rail is provided with an internal hydraulic rod. In the scheme, the micro-etching mechanism can efficiently remove the oxidation layer and pollutants of the pretreatment plate, provide a clean surface, and can also realize operations such as vibration liquid removal, liquid filtration and purification, and concentrated liquid recycling, so that the treatment effect and resource utilization rate are improved.

The utility model discloses safe storage equipment for refined glycerol, which relates to the technical field of refined glycerol storage, solves the technical problem of lack of heat preservation and flow slowing structures in the prior art, and comprises a main tank body and a tank body cover, a material injection structure is mounted on the tank body cover, and a material discharge structure is mounted at the lower end of the main tank body. An isolation flow slowing structure is fixedly installed in the main tank body, a low-temperature maintaining structure is fixedly installed outside the main tank body, through the isolation flow slowing structure, fluid inertia impact caused by vehicle braking or starting in the transportation process can be effectively reduced, and the risk of the tank body is reduced; in the filling and discharging processes, accidental combustion of the refined glycerol is prevented through a slow flow design; the low-temperature maintaining structure adopts a refrigerating machine compression refrigerating technology, and a low-temperature environment is maintained through spiral winding of a cooling pipe, an outer shell and a multi-layer heat preservation design, so that spontaneous combustion or chemical reaction caused by temperature rise in the transportation or storage process is prevented, and the quality and storage safety of glycerol are guaranteed.

The present application relates to the technical field of resin, in particular to a conductive polypropylene composite material and a preparation method thereof.In view of the problems of poor processing fluidity, easy shear damage of conductive network and deterioration of mechanical properties caused by high filling of conductive filler in the prior art, the present application realizes the low volume resistivity, high melt flow rate and excellent mechanical toughness by the solid phase pre-coating technology, and effectively balances the conductivity, processability and strength.

The invention relates to the technical field of sublimation crystallizers, in particular to a pillow-shaped plate type decompression sublimation crystallizer which comprises a sublimation tank body, a first crystallization tank body is arranged on the side of the sublimation tank body, a second crystallization tank body is arranged on the side of the first crystallization tank body, and the upper surface of the sublimation tank body is communicated with a first ventilation pipe. The bottom of the side wall of the first crystallization tank body is communicated with a first ventilation pipe, the output end of the first ventilation pipe is communicated with the interior of the first crystallization tank body, the bottom of the side wall of the first crystallization tank body is communicated with a second ventilation pipe, the output end of the second ventilation pipe is communicated with the interior of the second crystallization tank body, a feeding opening is formed in the upper surface of the sublimation tank body, and a sealing cover plate is arranged at the input end of the feeding opening. According to the invention, the sublimation tank body can be efficiently and uniformly heated through the arranged water bath heating assembly, the crystallization efficiency of the crystallizer can be improved through the arranged pressure reduction synergistic assembly, and the crystallization operation with higher purity and higher efficiency can be realized through the arranged crystallization assembly.

The application provides a lithium battery electrolyte preparation combination set, a site preparation method and device, and relates to the technical field of lithium batteries. The combination set comprises a base liquid unit and an active additive unit which are independently sealed and packaged; the specifications of the base liquid unit and the active additive unit are prepared according to a preset ratio, so that the active additive unit can be added to the base liquid unit and mixed to form a lithium battery electrolyte; the base liquid unit is stored in an environment at a first temperature; and the active additive unit is stored in a protective environment at a second temperature, and the second temperature is lower than the first temperature.

This invention relates to the field of battery technology, and more particularly to a positive electrode lithium replenisher, its preparation method, a positive electrode sheet, and a lithium battery. The aforementioned positive electrode lithium replenisher includes a core and a shell, with the shell covering the surface of the core to isolate the core from the side reaction environment. The core is a lithium-rich material, specifically at least one of Li5FeO4, Li5ReO6, and Li6CoO4. The shell is cobalt boride. This core-shell structured positive electrode lithium replenisher with cobalt boride as the shell effectively coats the core material, improves the air stability of the positive electrode lithium replenisher, reduces residual alkali, and thus enhances the battery's energy density and cycle performance.