168 results about "Slurry viscosity" patented technology

The invention discloses a lithium ion battery mixed slurry viscosity detection method based on lithium iron phosphate. The method comprises the steps of slurry pretreatment and parameter initialization, multi-modal data acquisition, dynamic viscosity compensation model construction, rheological property prediction, abnormality diagnosis and online feedback control. The temperature, the shearing rate, the solid content and the rheological curve of the slurry are acquired in real time through a multi-sensor fusion technology, a dynamic viscosity compensation model is constructed in combination with the characteristics of the lithium iron phosphate material, and a rheological prediction algorithm based on machine learning is introduced, so that high-precision and nondestructive online detection is realized. The influence of particle size distribution and temperature drift is eliminated through material characteristic modeling, and the measurement precision is further improved; and an ultrasonic wave and near infrared combined detection mode is adopted, so that the slurry structure is prevented from being damaged by a traditional sampling method, viscosity abnormity self-diagnosis and process parameter real-time feedback are realized, and the rejection rate is reduced.

The invention relates to the technical field of supercapacitors, in particular to an alkali-activated solid-waste-based supercapacitor and a preparation method thereof.The preparation method comprises the steps that industrial solid waste and fiber forestry and agricultural residues are subjected to co-pyrolysis to form organic-inorganic composite solid waste gelling powder, an alkali activator and a functional additive are added to prepare alkali-activated slurry, and the alkali-activated slurry is prepared; pouring, molding and curing to obtain an alkali-activated solid waste-based electrolyte substrate; the method comprises the following steps: performing high-temperature pyrolysis, activation and the like on granular agricultural and forestry wastes to prepare a carbon-based composite conductive material, and preparing a biochar electrode plate; the preparation method comprises the following steps: taking PVDF as a raw material, bonding and curing the PVDF and the raw material, immersing the PVDF and the raw material into a KOH solution containing a PVA thickener, inserting a glass fiber diaphragm, and regulating and controlling the use amount of PVDF and other binders and a solvent system to optimize slurry viscosity and film forming uniformity so as to obtain an electrode film with mechanical flexibility and interface adhesive force; the composite electrode forms a stable composite interface in the process of being in contact with an alkali-activated electrolyte interface, and the phenomena of interface aging and capacitance attenuation caused by mismatching between the electrode and the electrolyte in a traditional cement-based system are effectively avoided.

The invention relates to the field of geotechnical engineering construction, in particular to a deep and large open caisson resistance reducing and sinking assisting system and a cooperative control method, and the system comprises a stratum information base which stores stratum information corresponding to each well wall subarea; the attitude monitoring module is used for acquiring control point coordinates, control point elevation, deflection amount, well bottom elevation, water level in the well, surrounding stratum, sinking speed and blade foot resistance of the open caisson in real time; the thixotropic slurry drag reduction module can independently control the slurry viscosity of each well wall subarea; the high-pressure jet flow sinking assisting module can independently control the jet pressure of each well wall subarea; and the counterweight adjusting module can adjust the counterweight loading amount. According to the method, self-weight sinking, thixotropic slurry drag reduction, high-pressure jet flow sinking assistance and counterweight sinking assistance are covered, cooperative control over all drag reduction sinking assistance systems can be achieved, the construction efficiency of the deep and large open caisson penetrating through the hard soil layer can be greatly improved, the problems that the open caisson construction geological adaptability is poor, multi-system cooperation is difficult, and the accident rate is high are solved, and the construction quality is improved.

The invention provides a foundation pit water gushing iron ore grading thixotropic blockage reduction method which comprises the steps that iron ore tailings are crushed and screened into multi-stage particle size particles, and a customized mold is subjected to 3D printing based on foundation pit scanning data; paving particles in a mold layer by layer, doping iron powder, and cementing and curing cement paste to form a prefabricated body; the prefabricated body is installed to a water gushing area, the slurry viscosity is increased through a grading contact network, a weak gravitational flow state is triggered to be transiently changed to an anti-scouring state, and water flow speed reduction is achieved; alternating field induction micro-vibration is synchronously started during lateral grouting, and grout permeation and bubble discharge are driven; after solidification, the guide core body is pulled away, and remaining pore channels are self-compacted by a grading system to form an anti-seepage structure. The method has the advantages that the anti-scouring performance is enhanced; particle-slurry-foundation pit curved surface triple self-adaptive combination is carried out; the engineering cost is reduced.

The invention provides low-temperature synthesis equipment for reducing slurry viscosity and a synthesis method thereof, and relates to the field of ceramic slurry synthesis, the low-temperature synthesis equipment comprises a synthesis assembly, the synthesis assembly comprises a driving mechanism and a dispersion mechanism, the effective use outer diameter of the dispersion mechanism can be freely regulated and controlled, so that the dispersion mechanism can adapt to dispersion cylinders with different inner diameters; the working position can be flexibly adjusted without replacing the dispersion disc, the gap between the dispersion disc and the barrel wall is reduced to eliminate edge stirring dead angles, and meanwhile, the two dispersion mechanisms rotate in opposite directions, so that the dispersion mechanisms are matched with different outer diameters, a complex three-dimensional flow field can be formed in the barrel, the slurry dispersion uniformity and the viscosity reduction efficiency are remarkably improved, and the dispersion efficiency is improved. The problems that a dispersing disc of a dispersing machine used for synthesizing ceramic slurry is of a fixed structure and can only adapt to a dispersing barrel with a certain specific inner diameter, the dispersing machine is mostly of a single-disc structure, dead angles are easily formed at the upper part and the bottom of a barrel body, and the synthesis effect is poor are solved.

The invention relates to the technical field of chemical solution treatment, in particular to a device for reducing the viscosity of a slurry solution and a using method thereof.The device for reducing the viscosity of the slurry solution comprises a bottom bearing table, a closed stirring tank and a stirring detection set used for reducing the viscosity of the slurry solution. Slurry is stirred through the stirring assembly in the stirring detection group, a physical treatment mode is adopted, additional chemical substances do not need to be added, interference of additional components on slurry components is avoided, and the use and maintenance cost of chemical additives is reduced; the slurry in treatment is periodically detected through a detection assembly in the stirring detection group, the slurry reaching the expected viscosity is found in time, the overall production efficiency is improved while the production cost is reduced, dual detection is performed on the neutralized slurry through mutual cooperation of the detection assembly and the central control system, and the production efficiency is improved. And the viscosity of the discharged slurry is guaranteed.

The invention discloses a multifunctional polyamide type solid propellant slurry viscosity reduction auxiliary agent and a preparation method, and belongs to the field of viscosity reduction auxiliary agents, dimer acid and a polyamine compound are subjected to a condensation reaction at 135-150 DEG C, and a polyamide prepolymer is generated in obtained reaction liquid; and cooling the reaction liquid, adding a solvent, uniformly mixing, adding a vinyl monomer at 45-60 DEG C, reacting, and finally cooling to room temperature to obtain the multifunctional polyamide type solid propellant slurry viscosity-reducing auxiliary agent. According to the present invention, the use amounts of the dimer acid, the polyamine compound and the vinyl monomer are respectively 47-67%, 18-44% and 9-25% by mass, such that the fluidity and the viscosity in the propellant slurry can be effectively improved, and the mechanical strength of the cured product can be improved;

The invention discloses a basalt fiber modified cement-based capillary crystalline waterproof coating and a preparation method thereof, and relates to the technical field of waterproof coatings, the waterproof coating is prepared from Portland cement, surface modified basalt fibers, a gradient crystallization accelerator, nano-silica, a polycarboxylic acid water reducer, quartz sand, a functional additive and water; through composite pretreatment of the surface modified basalt fiber, a three-dimensional network structure is formed in the concrete, shrinkage stress is accurately compensated in combination with the magnesium oxide expanding agent, the crack resistance is remarkably improved, and the capillary adsorption effect of mesoporous nano-silica and the slow release design of the gradient crystallization accelerant are utilized to synergistically break through the penetration depth of active substances, so that the crack resistance of the concrete is improved. In addition, the viscosity of the slurry is reduced and the migration of active ions is accelerated by optimizing the molecular structure of the polycarboxylate superplasticizer, and the hydration process is regulated and controlled in cooperation with calcium lignosulphonate, so that the growth rate of ettringite crystals is multiplied, the crack repair can be completed in a short time, and the anti-permeability pressure is improved.

The invention provides a starch saccharification reaction state prediction, regulation and control method, which is applied to the technical field of food processing, and comprises the following steps: dividing a reaction system into a plurality of sub-regions, collecting temperature, slurry viscosity, starch particles, enzyme concentration and other sensing data of each sub-region, and calculating a local gelatinization degree index by using a preset gelatinization degree calculation model. According to the method, a saccharification reaction state prediction model is established, saccharification parameters of each sub-region are predicted in combination with the saccharification reaction state prediction model, then a saccharification state prediction result of the whole reaction system is generated, and the type, dosage and time of amylase putting are determined according to the deviation between the prediction result and a preset saccharification target. Therefore, the product quality and the saccharification efficiency are improved.

The invention belongs to the field of lithium ion battery positive electrode materials, and particularly relates to a low-cost preparation method of a lithium ion battery positive electrode material lithium manganese iron phosphate. The preparation method comprises the following steps: firstly, reacting manganese oxide with phosphoric acid and hydrogen peroxide in advance to obtain manganese phosphate slurry; adding an iron source and a carboxylic acid-based carbon source into the reaction system, uniformly stirring and mixing, ball-milling for a period of time, adding lithium phosphate and an organic carbon source into the reaction container, fully and uniformly mixing the raw materials, and refining particles; and finally, carrying out spray drying and high-temperature sintering on the obtained slurry to prepare the lithium iron manganese phosphate positive electrode material. The method has the advantages of low slurry viscosity in the preparation process, high solid content, simple preparation process, low cost, easiness in batch and large-scale expansion and the like, and the prepared lithium manganese iron phosphate positive electrode material product has excellent electrochemical performance.

The utility model discloses an anti-clamping roller mechanism of a desulfurization vacuum belt conveyor, and relates to the technical field of limestone-gypsum wet desulfurization equipment optimization. The device comprises a belt roller, positioning columns are coaxially installed on the two sides of the belt roller, one positioning column is coaxially connected with a power mechanism, the positioning columns are rotatably installed on a supporting frame, containing gaps are formed in the supporting frame, and the positioning columns penetrate through the containing gaps. The outer wall of the positioning column is connected with the inner wall of the containing gap through a bearing, the bearing is arranged in the containing gap, a plugging cavity is formed between the inner wall of the containing gap and the outer wall of the positioning column, and a plugging medium conveying mechanism is arranged in the supporting frame. The discharging end of the plugging medium conveying mechanism is communicated with the plugging cavity; the problems that according to an existing belt conveyor, a roller is prone to being clamped due to large slurry viscosity, and after the belt conveyor is shut down for a long time, a power roller is prone to being stuck are solved.

The invention provides a ternary positive electrode material, a preparation method thereof and a lithium ion battery. The ternary positive electrode material has a core-shell structure, the core is the ternary positive electrode material, and the shell comprises three coating layers, namely a LiCoO2 layer, a lithium supplementing mixed layer and a protective mixed layer from inside to outside in sequence. And the lithium supplementing mixed layer is composed of LiCoO2 and (LiCo *) 2O. A layer of positive electrode lithium supplement agent is constructed on the surface of the positive electrode material in situ, the self-lithium-supplement positive electrode material is synthesized, and the problem of uneven dispersion of the positive electrode lithium supplement agent is solved. And the residual alkali content of the lithium self-supplementing positive electrode material is reduced through surface coating, so that the problem that the viscosity of the slurry is increased is solved.

The invention provides a splitting grouting discrete element numerical simulation method based on slurry viscosity time-varying characteristics, and belongs to the technical field of splitting grouting simulation. Comprising the following steps: performing a slurry viscosity time-varying characteristic indoor test to obtain the time-varying characteristic of slurry viscosity; constructing a slurry DEM particle viscosity time-varying contact model based on the time-varying characteristics; carrying out splitting grouting simulation based on a slurry DEM particle viscosity time-varying contact model; under a fixed working condition, an obtained simulation result is compared with a test result of an indoor test, and the slurry DEM particle contact model is calibrated; and the calibrated slurry DEM particle contact model is utilized to carry out splitting grouting simulation under multiple working conditions. According to the device and the method, the viscosity time-varying characteristic and the phase change consolidation mechanism of the slurry can be effectively coupled, and the dynamic influence of the rheological characteristic of the slurry in a pore injected medium on the splitting diffusion process can be accurately simulated; and a beneficial method is provided for improving the accuracy and scientificity of the splitting grouting diffusion process of the tunnel and underground engineering.

Disclosed are a viscosity-reducing polycarboxylic superplasticizer and a preparation method therefor. The viscosity-reducing polycarboxylic superplasticizer is obtained by compounding a macromolecular polymer and a pre-wrapped small-molecule polymer in a weight ratio of 1.7-2.3 : 1, wherein the molecular weight of the macromolecular polymer is between 75,000-85,000; and the pre-wrapped small-molecule polymer comprises a small-molecule polymer, a thickening agent and water in a weight ratio of 1,000 : 0.7-1.3 : 8-10, with the molecular weight of the small-molecule polymer being between 14,000-16,000. The polycarboxylic superplasticizer is prepared by compounding the macromolecular polymer and the small-molecule polymer in a certain proportion, thereby exerting a linked viscosity reduction effect, effectively reducing the slurry viscosity of high-performance concrete, improving the adaptability of a concrete admixture, and solving the problem of the site construction of high-performance concrete being difficult.

The present invention discloses an intelligent grouting calculation method and system based on the coupling of neural network and numerical solution, comprising: determining the fluid calculation control equation required for the calculation working condition; taking boundary conditions, grouting velocity, grouting pressure, initial flow field of dynamic water, gravity field, slurry diffusion morphology, temperature field, slurry viscosity, constant volume specific heat capacity, thermal conductivity and density as input data, performing numerical simulation of the input data in the initial stage through a numerical simulation method, taking the parameters of the last time step obtained from the numerical simulation in the initial stage as initial data, inputting them into a trained neural network model, and obtaining prediction results of slurry velocity, grouting pressure, phase fraction and viscosity data; the present invention performs numerical simulation of the input data in the initial stage through a physical solver, and captures physical fields such as pressure, velocity, temperature, as well as local details and global spatiotemporal evolution trends between each field through a neural network model, thereby realizing efficient grouting numerical simulation.

The invention discloses a full-automatic slurry mixing control system and method for oil field well cementation equipment, and belongs to the technical field of oil field well cementation or ocean engineering, and the method comprises the following steps: S1, collecting slurry state data, power system operation data and external environment data through a multi-dimensional state sensing module to generate a real-time working condition data set; s2, based on the real-time working condition data set, adopting a preset slurry rheological state differential model to predict dynamic evolution of slurry viscosity so as to generate future slurry viscosity; s3, according to the future slurry viscosity and the preset slurry safety temperature upper limit, a preset lowest energy consumption trajectory planning model is adopted, and the optimal flow control trajectory of the power system is solved; s4, according to the real-time working condition data set, a preset optimal activator injection decision model is adopted, and the optimal activator dosage is worked out, and the accuracy and reliability of future slurry viscosity prediction are greatly improved.

This invention relates to a method for the graded utilization of wet-process phosphoric acid and the co-production of food-grade phosphoric acid and ammonium phosphate, belonging to the field of phosphoric acid chemical technology. The method first purifies the raw phosphoric acid, with the main process involving multi-stage extraction and back-extraction to obtain food-grade phosphoric acid. For the byproduct raffinate acid, no complex purification is required; instead, a slurry process is used directly to prepare fertilizer. When producing diammonium phosphate, the final neutralization pH is controlled at 8.0-8.5, and the degree of ammoniation is 1.8-2.0. When producing monoammonium phosphate, the raffinate acid is mixed with slag acid and filter solids, and a small amount of raw material acid is added to neutralize to a pH of 4.0-4.5, with a degree of ammoniation of 1.0-1.1. This invention overcomes the problems of high slurry viscosity, equipment blockage, and low product grade caused by the direct fertilizer production of raffinate acid with a simplified process. Furthermore, it coordinates with the disposal of system waste in monoammonium phosphate production, truly achieving high-value utilization and clean production of all components of wet-process phosphoric acid.

A method for producing an electrode assembly for a solid-state battery, wherein the electrode assembly is produced by partially drying an electrode slurry (20-50% dryness) and subsequently coating it with a solid electrolyte slurry of controlled viscosity (1,000-10,000 cP) and solids content (40-80 wt%). Both slurries are dried at 60-120 °C, whereby the ratio of solid electrolyte slurry viscosity to electrode slurry viscosity (0.2-1.0) is reduced to minimize interlayer mixing. The degree of dryness is determined by comparing the residual solvent in the partially dried layer with that of the original slurry. This approach results in a uniform interface between the electrode and the electrolyte.A corresponding method for a solid-state battery encloses the resulting electrode arrangement together with an anode layer in a battery housing, ensuring improved interfacial stability.

The application relates to the technical field of lithium ion batteries, in particular to an ultralow-viscosity manganese iron phosphate lithium material and a preparation method thereof, which comprises the following steps: S1. preparing a manganese iron phosphate precursor; S2. mixing the manganese iron phosphate precursor, lithium hydroxide, goulac gum, vanadium pentoxide and deionized water, and then performing second grinding to obtain a premix; and S3. drying, sintering and airflow crushing the premix to obtain the ultralow-viscosity manganese iron phosphate lithium material. The manganese iron phosphate precursor is synthesized in advance, so that the uniform distribution of manganese iron elements in the material can be ensured; then, the manganese iron phosphate precursor is reacted with lithium hydroxide, goulac gum and other substances; part of the goulac gum releases an aldehyde group in an alkaline environment created by the lithium hydroxide, and serves as a reducing agent; the remaining goulac gum serves as a dispersant, reduces the slurry viscosity and is helpful to the uniform dispersion of components; in addition, the goulac gum can form a dense and uniform coating layer on the surface of the material as a polysaccharide, so that the performance of the manganese iron phosphate lithium material is improved.

The invention discloses a desulfurization slurry foaming early warning system based on viscosity control and an operation method thereof, and belongs to the technical field of industrial flue gas desulfurization intelligent control. The system comprises a data acquisition and processing module, a feature extraction module, a model calculation module and a risk early warning module. The system collects slurry viscosity, temperature, pH and foam height signals in real time, and adopts a sliding time window to extract dynamic characteristics such as viscosity change rate delta V / delta t, temperature deviation delta T and pH fluctuation standard deviation sigma pH; based on fusion of an index nonlinear distribution method with time-varying gain and an XGBoost decision tree algorithm, an adaptive foaming risk index model R (t) is constructed, and dynamic adjustment of parameter weight coefficients (Wv, Wt and WpH) is realized. By introducing a model prediction error feedback e (t) and an actual observation risk index Robs (t), the system can automatically correct the weight and continuously learn an operation rule, so that advanced prediction and graded early warning of the foaming risk of the desulfurization slurry are realized.

The utility model discloses a compound fertilizer slurry viscosity regulation and control device, especially in the technical field of compound fertilizer production, including the shower nozzle, the shower nozzle outside is equipped with the adjusting part for adjusting compound fertilizer slurry viscosity, the adjusting part prevents compound fertilizer rubber material to stay through multiple groups of vibrating part, and each group vibrating part includes the vertical board of being equipped with the outside of shower nozzle top end, the one side of vertical board bottom end is close to the installation of telescopic link of shower nozzle, the one end of telescopic link is installed with the movable plate of the section of L of far away from vertical board.

The invention relates to the technical field of shield tunnel construction, in particular to an underground structure compaction grouting permeation filtration diffusion time-varying analysis system and method.The method comprises the following steps that a grouting pressure and grouting time relation calculation model is built, and construction parameters are obtained; inputting the obtained construction parameters into a constructed grouting pressure and grouting time relation calculation model; the situation that the grouting pressure changes along with the grouting time and considering the deep percolation effect and the slurry viscosity time-varying characteristic at the same time, the situation that the grouting pressure changes along with the grouting time and considering the deep percolation effect independently and the situation that the grouting pressure changes along with the grouting time and considering the viscosity time-varying characteristic independently are obtained through calculation and output. According to the method, the pore blocking effect caused by particle deposition of the slurry in the soil body and the dynamic change of the slurry viscosity along with time are coupled, and the influence of the deep percolation effect and the time-varying property of the slurry viscosity on the permeation and diffusion of the slurry is considered at the same time.

An electrode assembly is produced by partially drying an electrode slurry (20-50% dryness), then coating a solid electrolyte slurry with controlled viscosity (1,000-10,000 cP) and solids content (40-80 wt %). Both slurries are dried at 60-120° C., while the ratio of solid electrolyte slurry viscosity to electrode slurry viscosity (0.2-1.0) reduces interlayer mixing. The degree of dryness is determined by comparing residual solvent in the partially dried layer to the original slurry. This approach yields a uniform interface between the electrode and electrolyte. A corresponding method for an all-solid-state battery encloses the resulting electrode assembly, along with an anode layer, in a battery casing, ensuring enhanced interface stability.

This invention discloses lithium iron phosphate cathode materials, their preparation methods, and lithium-ion batteries, relating to the field of lithium-ion battery technology. This invention utilizes first, second, and third iron phosphates of different particle sizes to form a three-level multi-scale particle size distribution system, which can improve the material's packing efficiency and compaction density. By utilizing the synergistic effect of macromolecular carbon sources and dispersants, the sand milling process is optimized, reducing slurry viscosity and improving sand milling efficiency, significantly reducing sand milling time while ensuring particle integrity and dispersibility. Simultaneously, the use of macromolecular and small-molecule carbon sources to form a double-layer carbon coating structure achieves synergistic mechanical support and conductive enhancement, simultaneously improving the material's cycle stability and rate performance.

The invention belongs to the technical field of grouting simulation, and particularly discloses a deformation porous medium splitting grouting simulation method and system.The method comprises the steps that a three-dimensional geometric model of a porous medium in an area to be simulated is built, a computational domain is determined, and the computational domain is divided into a plurality of non-overlapped unit grids; establishing a multiphase system control equation, and carrying out numerical updating on relative permeability, density, viscosity and surface tension; on the basis of the updated parameters, fluid velocity field calculation is conducted through a fluid control equation of the pure fluid area; calculating transmission time based on the obtained fluid velocity, and updating a slurry viscosity field through a slurry viscosity space-time tracking model; and the solid speed and mass are updated based on the solid mass and momentum conservation equation, and the grouting simulation process is completed. According to the method, the permeability change of the porous medium and the dynamic coupling effect of the stress state are comprehensively considered, and a scientific basis is provided for grouting design and optimization under complex working conditions in engineering.

The invention provides a battery pole piece production coating control method, a battery pole piece production coating control system and battery pole piece production coating control equipment, and relates to the field of battery production control. Compensating the coating width deviation caused by factors such as base material tension fluctuation, slurry viscosity change, base material transverse deviation and the like by using the first feedback control parameter; in addition, according to the method, a second feedback control parameter is accurately obtained by fully utilizing dislocation data between the front side and the back side of a base material of the battery pole piece, and the second feedback control parameter is utilized to compensate for edge dislocation of a double-side coating film caused by factors such as base material dislocation and tension fluctuation; the two feedback control parameters can be decoupled through a model prediction control means, so that mutual interference caused between control loops is restrained, the coating consistency of the battery pole piece is improved, and the energy density and safety of the battery are improved.

This application discloses a multi-parameter real-time monitoring and intelligent batching system for gangue-filled slurry, comprising: a sensing and monitoring module for real-time acquisition of slurry physical property parameters and pipeline operating parameters during the preparation and transportation of gangue-filled slurry; the parameters include at least slurry density, slurry viscosity, slurry flow rate, and pipeline pressure; an intelligent decision-making module, communicatively connected to the sensing and monitoring module, which has a built-in intelligent decision-making model based on deep reinforcement learning, for dynamically outputting instructions for adjusting the slurry ratio based on the received real-time parameters, the instructions including the adjustment amount of the mass ratio of fine-particle gangue to coarse-particle gangue and the adjustment amount of slurry mass concentration; and a batching execution module, communicatively connected to the intelligent decision-making module, for real-time control of the fine-particle gangue feeding device, the coarse-particle gangue feeding device, and the water supply device according to the instructions, so as to dynamically adjust the particle size distribution and concentration of the slurry. This achieves adaptive optimization of the gangue-filled slurry ratio.

This invention relates to a method, device, equipment, and medium for controlling post-grouting construction of cast-in-place piles, belonging to the field of communication technology. The method includes: parameter optimization calculation: constructing a dynamic optimization model based on machine learning algorithms to perform multi-objective collaborative optimization of grouting pressure, grouting volume, and grout viscosity, outputting the design value of each parameter; real-time feedback control: dynamically adjusting grouting parameters according to the pressure fluctuation rate and flow deviation rate during the grouting process to meet preset constraints; and intelligent termination control: dynamically executing a graded termination strategy based on real-time monitoring data, where different graded termination strategies correspond to different termination conditions. This achieves the effect of enabling the automated system to accurately allocate the amount of grouting material according to real-time working conditions, avoiding material waste caused by improper human operation, and significantly improving material utilization.

The purpose of the present invention is to provide a vinylidene fluoride copolymer that, even when mixed with an electrode active material such as lithium iron phosphate or lithium iron manganese phosphate to prepare an electrode mixture, has a slurry viscosity that tends not to increase excessively, and allows binding of an electrode active material at a high adhesive strength. This vinylidene fluoride copolymer that addresses the above problem contains a structural unit derived from vinylidene fluoride, and has a slurry viscosity as measured by a predetermined method and a binder solution viscosity as measured by a predetermined method that satisfy: the slurry viscosity / the binder solution viscosity < 5. The molar absorption coefficient at a wavelength of 346 nm two days after preparation of an N-methyl-2-pyrrolidone solution having a concentration of the vinylidene fluoride copolymer of 5 mass% is 1,800 M-1cm-1 or more.