Technical fieldThe invention relates to the technical field of transmission in mechanical engineering, and relates to a transmission device which realizes torque transmission through non-contact connection, in particular to a disk-type speed regulating magnetic coupler based on bevel gear transmission. It can be applied to large vibration between the motor and the load, as a transmission system of power transmission and speed regulation.Technical backgroundMagnetic coupler uses the magnetic field generated by permanent magnets to transmit force and motion. The use of magnetic coupler for speed regulation of fans and pumps can make up for the deficiency of frequency converters in specific occasions. On the one hand, the structural characteristics of the physical separation of the main and slave disks in magnetic coupler can make it work normally in a variety of harsh environments. In thermal power plants, coal mines and other bad occasions filled with coal powder, soot, corrosive gas, magnetic coupler can still drive the fan, pump type variable load operate stably, with strong reliability, low maintenance cost, and high production efficiency.On the other hand, the use of magnetic coupler can also greatly reduce the power consumption. When the working speed and flow rate of fans and pumps are controlled at 80% of the rated value, the energy consumption is 64% of the rated power, greatly saving energy and production costs. In addition to energy saving, being suitable for harsh working environment and high reliability, magnetic coupler used in fan, pump variable load generally also has the following advantages: (1) the main and slave disk separation; having good vibration isolation and overload protection performance, realizing soft start; (2) simple component structure, low cost of manufacturing, assembly and equipment maintenance; (3) no high frequency current, no high harmonic and electromagnetic interference; (4) Speed regulating mechanism is a pure mechanical non-electronic device, tolerating a certain error in the center, high reliability, and long system life.Jiangsu University discloses an adjustable meshing area asynchronous magnetic torque converter and its speed regulation method in patent 201210434367.5. A pair of meshing bevel gears are controlled by a micro motor, and the rotation of the motor is transformed into the axial displacement of the inner rotor matrix by the output bevel gears driven by screw rotation. Thus, the speed regulation is realized by adjusting the meshing area between the permanent magnet and the copper bar. In this invention, the axial displacement of the dial block is transformed into the circumferential rotation of the large bevel gear sleeve through the large bevel gear sleeve; the rotational motion of the N pole (or S pole) permanent magnet is finally realized through the meshing of the bevel gear, and the average positive opposite area and air gap spacing between part of the permanent magnet and the conductor ring are changed. At the same time, the alternating arrangement of N and S poles is also changed, so as to adjust the magnetic density of the air gap to achieve speed regulation.Advantages of the invention(1) There is a non-contact coordination between the driving disk and the driven disk, and the magnetic tight transmission torque through the air gap between the main and slave driving disks can effectively solve many problems in the rotation process, such as centering, soft starting, overload protection and vibration isolation.(2) In this invention the traditional way of changing the air gap spacing or the positive area between the permanent magnet and the conductor ring is not completely used, but it gradually changes the alternating arrangement of the N and S poles of the permanent magnet when changing the average positive area and the air gap spacing between the partial permanent magnet (the total part of the permanent magnet) and the conductor ring. It can adjust the speed without changing the overall relative position of the master and slave disk, and make full use of the space.

Improving greenhouse gas mass transfer and emission reduction technology by bioreactor designA new low-cost photobioreactor was designed and its actual greenhouse gas emission reduction performance was monitored in real time. The research will focus on the mechanism of gas emission reduction in CO2 and N2O-- the efficient nutrient mixing, mass transfer, morphological changes of greenhouse gases in photobioreactor, and the photochemical efficiency monitoring of microalgae cells. Using computer fluid dynamics modeling analysis and applying these ideas to industrial production, this research is of great practical significance for high biomass yields of microalgae and reduction of greenhouse gas emissions.Agricultural and chemical wastewater carbon neutralization and nitrogen recovery technologyThe influence mechanism of the growth of microalgae and algal bacteria mixed system using different forms of carbon was explored, and the growth model of microalgae using wastewater mixed carbon was established. The growth of microalgae, the change of bacterial community structure, the transformation of carbon and nitrogen, and the interaction mechanism of the three are described. All kinds of nitrates and ammonia nitrogen in the water and other nitrogen pollutants are physically separated or chemically transformed into high-value products such as proteins through biosynthesis.Efficient photosynthesis carbon sequestration and high-value carbon products of marine algae conversion technologyFocusing on the high efficiency carbon fixation of economic algae such as Phaeodactyla trigonata and Pseudochloresia microalgae, and the metabolomics and transcriptomics of biosynthesis of high-value carbon products such as eicosapentaenoic acid (EPA) and fucoxanthin. In-depth exploration of economic algae photosynthesis carbon sequestration mechanism and the metabolic pathways, enzymes and metabolites of high value carbon product biosynthesis machine. Elucidating the carbon fixation and carbon allocation mechanism of economic algae.

First, we develop a system that can achieve macroscopic superslip in two typical acid-base environments, and achieve superslip in both solid-liquid coupling and pure liquid-body solution conditions. The details are as follows:(1) A new macroscopic superlubrication system of graphene/potassium hydroxide (G/KOH) solution is proposed; The graphene additives involved are removed from the graphene/epoxy resin (G/EP) friction pair in place by friction, continuously providing newly stripped graphene to the KOH solution and minimizing the adverse effects of graphene agglomeration. In addition, the graphene additive prepared in situ has thinner thickness and better aggregation resistance, thus providing more graphene to hold OH- and forming more OH-/ graphene /OH- stacked sandwich structures between friction pairs (i.e., the equivalent of a moving block with more wheels), Finally, super lubrication (μ=0.0045) is achieved. The research has been published in Friction (2023, 11(4), 567-579), a TOP engineering journal.(2) High concentration zinc chloride aqueous solution was used as lubricant to achieve macroscopic superslip (μ=0.002). The effects of the number of cluster configurations on the tribological properties of lubricants were also revealed.Sceond, new liquid superlubricity systems were constructed based on cholinyl-based ionic liquids, and the source of superlubricity was analyzed from the molecular/atomic level by combining experimental and molecular dynamics simulation methods. The details are as follows:(1) Based on choline chloride/magnesium chloride hexahydrate ionic liquid, a water-regulated ionic liquid (ILA/H2O) super lubrication system was constructed. Strong hydrogen bonding in ionic liquids is weakened by the introduction of 2-10 wt % water, thus enabling macroscopic super-lubrication at ~700 MPa Hertz contact pressure (0.006< μ< 0.008). And it can be used in a variety of materials friction pairs (e.g., steel/steel, steel /SiO2, Si3N4/Al2O3 and Si3N4/SiO2) to obtain very low friction (μ< 0.01).(2) Another super lubrication system was constructed based on the water-regulated choline chloride/D-glucose ionic liquid (ChCl/Glu-H2O). The lubrication material maintains tribological properties comparable to ILA/H2O (0.003< μ< 0.007, the maximum Hertz contact pressure is ~700 MPa), and at the same time, the tolerance to ambient humidity is improved, and it is more environmentally friendly. It also has the potential to be widely used in a variety of scenarios.Third, based on the asymmetric contact between non-equal diameter particles, two kinds of high bearing solid additive/lubricating fluid (oil) super lubrication systems were constructed. The details are as follows:(1)The additive /ILA (Uneq-SA/ILA) super lubrication system is formed by mixing two polymer PMMA pellets of different sizes as additives with ion-like liquid (ILA). Ultra-lubricated (μ as low as 0.0046) on silicon nitride (Si3N4)/quartz glass friction pairs is achieved and bearing capacity can be up to 568 MPa.(2) With high-hardness inorganic compound SiO2 nanoparticles as additive and castor oil (CO) as the base solution, the Uneq-SA/CO lubrication system was constructed. The super-lubrication (μ≈ 0.008) was achieved on the friction pair of GCr15 steel /SKH55 high-speed steel, and the load was up to 637 MPa.

Technical fieldThe invention relates to the application technical field of laser processing, in particular to a laser phase transformation hardening method and a processing device for raceway of variable rotor/yaw bearing rings, and is suitable for heat treatment of raceway surface of large bearings.Technical backgroundThe working environment of wind turbine is harsh, so the vibration resistance and fatigue resistance are required to be higher. In order to improve the service life of bearings, heat treatment is needed on the surface of bearing ring raceway during processing to improve its corrosion resistance and vibration resistance. Variable paddle/yaw bearing ring is generally manufactured by 42CrMo. Other materials with comparable or better performance can also be used, and the surface hardening hardness of the ring raceway shall be no less than 55HRC, and the surface hardening layer depth of the raceway shall be no less than 3mm.Traditional heat treatment process can obtain high hardness of martensite through normalizing, annealing, quenching in tempering, and after tempering the vibration resistance and anti-fatigue performance can greatly improve. However, due to the instability of temperature in the processing, the workpiece in the induction quenching stage often has soft belts due to incomplete quenching. The size of variable paddle/yaw bearing ring is generally more than two meters. It is difficult to process some parts, and the ring wall is thin. Therefore, the workpiece will produce thermal deformation due to high temperature in the heat treatment process. Therefore, the workpiece generally needs to be processed after tempering, and in the process of tempering cracks may also be produced, leading to scrap.With the progress of science and technology, laser quenching gradually began to be widely used in machinery industry. Compared with traditional quenching, laser quenching has high energy density, fast cooling speed, no need for cooling medium, uniform quenching layer, high hardness (1 ~ 3HRC higher than traditional quenching), small workpiece deformation, easy to control heating layer depth and heating track , easy to realize automation. Therefore, in many fields, laser quenching is gradually replacing the traditional quenching. Laser quenching is also widely used in the phase change hardening of wind turbine bearing rings. Laser quenching can realize the partial processing of bearing ball and ring raceway, and the quenched workpiece does not need to carry on further finishing, which improves its performance and saves the processing.The evenly distributed hardening layer along the raceway surface is the ideal shape of the ring hardening layer. In the current domestic laser heat treatment process, laser is always directed at the workpiece at a constant angle, and the hardening layer is the deepest along the laser direction. For the straight workpiece, laser can always be perpendicular to the plane directing at the workpiece, and the hardening layer is evenly distributed along the plane. For the irregular curved surface, the laser cannot always be perpendicular to the surface, so in the laser phase change hardening process of variable paddle/yaw bearings, the depth of the hardening layer along the raceway surface is often inconsistent. In the invention, the processing angle of the laser on the raceway of the ring can be adjusted according to the bearing of different sizes, so as to achieve the maximum processing depth and obtain the uniformly distributed hardening layer, and improve the service life of bearings.Beneficial effects of the invention:1. After laser phase transformation hardening process by laser beam on the surface of the vertical raceway, the depth of the hardened layer is significantly increased, and the maximum depth of the hardened layer can reach 6.5mm. The uniform and stable dislocation, and the refined grain on the surface and the subsurface of the raceway effectively improve the contact strength and fatigue resistance of the bearing raceway, and also improve the wear and corrosion resistance of the bearing raceway.2. The support frame is provided with a tilt table of 45 degrees, and different angles of the tilt table can be changed according to the working environment and conditions, which can realize the phase change hardening processing of raceway.3. The cantilever beam and the support frame are equipped with ball screw, which can process the raceway of bearing rings of different sizes. The device can be used to carry out phase transformation hardening process for different types of rings, and has universal applicability for large bearing rings with a diameter of more than two meters.

1 Construction OverviewThe development of hydrogen fuel cell vehicle is a major strategic demand of dual carbonHydrogen fuel cell vehicle: zero emission, fast fuel filling, good low temperature performance, long driving range, etc.However, there are still shortcomings in energy density, safety and efficiency of fuel cell vehicles.To tackle key technologies of fuel cell vehicles and promote the application of fuel cell vehicles is an inevitable choice to implement the national strategy and national plan.Fuel cell engine research instituteBased on the national two-carbon strategy, the Fuel Cell Engine Research Institute of Jiangsu University has made full use of integrated resources to form a research institution with basic research, high-tech innovation, talents and authoritative evaluation functions. Aiming at the vehicle scale fuel cell engine and through the research and development of new key materials with high performance and long life, key component technology breakthrough, intelligent integrated technology innovation research, we break the development bottleneck, vigorously develop and obtain fuel cell engine complete machine and core component technology with independent intellectual property rights, so that the institute becomes an effective channel for the transformation of research results into application. It plays the role of an important source and strong support platform for the independent innovation of industrial technology, and forms a research and development group of domestic new energy power system and a training base for related professional and technical personnel.As a member of the fuel cell Engine Sub-committee of China Internal Combustion Engine Society, the Institute is an important research and development force in the field of advanced new energy vehicles in our province. It undertakes and participates in the national, various ministries and local longitudinal research projects, and carries out extensive cooperation with scientific research institutions, universities and enterprises in our province.At present, in the institute there are 5 full-time teachers, 6 associate professors, 7 lecturers, 3 industry professors, 5 full-time doctoral students and more than 20 master students.Scientific research conditions2. Basic ResearchMacroscopic scale numerical calculation method -- VOF model developmentNumerical calculation method of mesoscopic scale: Development of lattice Boltzmann modelResearch Direction 1- Fuel cell efficient water and gas transport managementIn order to explore the wetting state of the micro-pore surface on the fuel cell runner surface and optimize the shape parameters of the micro-pore surface, a two-dimensional lattice Boltzmann pseudo-potential multiphase flow model was established to investigate the influence of shape on wetting behavior.In order to improve the drainage performance of proton exchange membrane fuel cell (PEMFC), a three-dimensional numerical study of water removal in the flow channel of microstructured PEMFC was carried out. The influence of microstructure shape parameters (height, radius and spacing) was investigated.Research Direction 2- Fuel cell cold start mechanismIn order to explore the melting process of perforated gas diffusion layer and the effective and efficient GDL structure to improve the performance of ice melting, a three-dimensional ice melting model was established based on the enthalpy lattice Boltzmann method. Modified bending boundary conditions are used to account for complex carbon fiber surfaces. The influence of hole shape parameters on ice melting was studied.A three-dimensional model was established based on lattice Boltzmann method (LBM) to study the ice melting process in the gas diffusion layer of PEMFC. A single point second order curved boundary condition is adopted. The effects of carbon fiber quantity, carbon fiber quantity increasing slope and carbon fiber diameter on ice melting were studied.Research Direction  3- Hydrogen production from methanol reformingThe tubular methanol steam reformer and the self-heating plate reformer based on fractal theory were designed and developed respectively, and catalysts were loaded by packed bed and impregnation method to study the performance of methanol steam reformer.In order to investigate the influence of fractal structure on the heat and mass transfer process of methanol reforming reaction, a three-dimensional numerical model of methanol steam reforming reaction was established based on the three-rate reaction mechanism, and the influence of characteristic parameters of fractal structure on the heat and mass transfer process of the reactor was discussed.Research Direction  4- Electric hybrid energy managementTaking fuel cell and power cell mixing degree as the research object, the coupling mechanism of static mixing degree and dynamic mixing degree was studied to obtain the optimal vehicle design parameters.The output feedback of continuous dynamic input excitation was obtained by bench tests of the system and components, and the deviation between the real model and the simulation model was obtained by Sobol method of global sensitivity analysis to form a high-precision simulation model.In the framework of MPC model prediction algorithm, LSTM long and short term memory artificial neural network was used for speed prediction, and DDPG depth deterministic strategy gradient algorithm was used for energy management and control.Research Direction 5- Fuel cell vehicle developmentJointly develop fuel cell vehicle electronic control platform with domestic well-known enterprises, and conduct prototype research and development and testing based on mature platform technology.The developed energy management control strategy was verified by HIL hardware-in-the-loop test and vehicle test, and the vehicle development process was closed.Research Direction 6- Liquid hydrogen storage and transportation technology and applicationTo develop high-safety and long-life liquid hydrogen systems for vehicle use, break through key technologies such as short vacuum life of liquid hydrogen bottles and high safety requirements for complete equipment, and promote the industrialization of liquid hydrogen equipment for vehicle use.Design and develop hydrogen fuel cell vehicle circulating water bath double helix shell carburetor, and optimize the structural parameters to determine the best circulating water flow under different working conditions, compared with the traditional carburetor vaporization efficiency is significantly improved.Design and develop liquid hydrogen cold energy utilization system, make full use of the cold energy of liquid hydrogen in the process of vaporization, greatly improve the utilization efficiency of liquid hydrogen as an automobile energy, and realize energy recycling.The power battery subsystem uses the combined cycle method which combines the direct expansion method and Rankine cycle method to exchange heat between the cold energy of liquid hydrogen vaporization and the waste heat of lithium battery and motor, so as to realize the combined power generation of cold energy and heat energy.3. Engineering DevelopmentCooperative partnerWork together to tackle key problems in the whole industry chain -- establish a "fuel cell vehicle demonstration and application consortium" to ensure orderly research and development of a new generation of fuel cell vehicles through efficient upstream and downstream linkage of the industry chain of vehicle enterprises, fuel cell system enterprises, operators, users and hydrogenation stations.Typical case - Ejector design optimizationAccording to the requirements of enterprises, the ejector components of fuel cell hydrogen circulation system were optimized. After optimization, the ejection ratio is over 3, well meeting the requirements of enterprises.Typical case - Design optimization of hydrogen separatorAccording to the requirements of enterprises, the baffle type hydrogen separator of fuel cell hydrogen circulation system was designed and optimized. The water separation efficiency of the optimized hydrogen separator can reach 90%, meeting the needs of enterprises.Typical case - Hydrogen supply valve group developmentThe joint development of the fuel cell hydrogen supply valve suite, including hydrogen stop valve SOV, hydrogen injection proportional valve HGI, ejector JP, pressure limiting valve PLV-G and pressure sensor; it reduces the volume of the hydrogen supply system, simplifies the gas path structure, and improves the sealing performance.

Technical FieldThe invention belongs to the technical field of medical device, involving intelligent nursing technology, in particular to a robot nursing system based on cooperative control of visual and thought signals.Background TechnologyJust as industry and manufacturing are rushing to automate, robots have been seen as a promise to "save" the disabled. In recent years, artificial intelligence has ushered in a new wave of product application with the breakthrough of deep learning algorithm. In the context of insufficient supply and unbalanced distribution of medical resources, artificial intelligence has landed in various subdivisions of medical and health care, covering all application scenarios of the whole industrial chain. As the market demand is becoming urgent, nursing robot is bound to become the pioneer of service robot comprehensive marketization.At the same time, with the development of the country, the society gradually aging. The demand for medical treatment, nursing and rehabilitation increases, due to the serious imbalance of the doctor-patient ratio in the domestic medical system. In the ward, many patients with mobility difficulties and no autonomous ability need special nursing staff to take care of: feeding water, medicine and so on. As a result, there is not enough nursing staff to meet the basic needs of every patient.At present, the intelligent nursing system cannot realize the autonomous nursing of nursing equipment, and special nursing staff is needed to carry out nursing work, which cannot effectively liberate nursing staff and solve the tense situation of nursing staff.Contents of the InventionAiming at the problems existing in the prior art, the invention provides a robot nursing system based on the cooperative control of vision and idea signal. By extracting the brain's idea signal and combining machine learning, the intelligent nursing function with weak supervised learning effect can be achieved. It solves the common needs of both doctors and patients, liberates the human resources of the hospital and improves the working efficiency of hospital nursing.The robot nursing system based on the collaborative control of vision and idea signals is characterized by: head-mounted brainwave acquisition device, Kinect camera, display, robot arm, idea signal processing module, image processing module, face mouse control module and robot arm control module;The idea signal processing module is used to collect the brainwave signal and wink emg signal of the nursing object in real time, extract the concentration value in the brainwave signal, and judge whether the nursing staff is in the state of concentration.The image processing module is used to collect and process RGB images and depth images in real time, extract key points of the face, identify the tension-closing state of the mouth, and determine the two-dimensional coordinates of the mouth and the depth of the key points of the mouth;The face mouse control module, based on the nose tip movement the object control the mouse pointer on the liquid crystal display screen, to achieve the selection of required items, and use the wink emg which is detected by the idea signal processing module to determine whether to blink to select items;The manipulator control module activates the action of the robot arm based on the attention state of the caregiver determined by the idea signal processing module and implements the grasping action according to the selected items of the face mouse control module. The object is sent to the mouth of the caregiver according to the two-dimensional coordinates of the mouth processed by the image processing module and the three-dimensional coordinates determined by the key point depth of the mouth.Advantages of the Invention1. The invention uses the idea signal as the starting signal and the visual feedback to ensure the operating accuracy of the system. The RGB image is combined with the depth image to capture the face in real time and output the mouth data, which has a higher overall accuracy than the existing nursing robot system.2. The face mouse technology used in the invention provides great convenience for patients. Patients only need to move the nose tip to control the mouse to select the items they need, which reflects the characteristics of humanization and intelligence.3. The invention can realize the autonomous fetching and feeding of edible goods according to the independent consciousness and needs of the caretakers, reducing the work intensity of the caretakers to a certain extent, liberating the caretakers, and relieving caretakers stress.4. At present, most service robots operated by thought are based on brain-computer interface technology. However, in order to obtain more accurate "idea", we have high hardware requirements. The cost is expensive and it is difficult to popularize in a short time. The invention only needs a low-cost brainwave headset to train concentration, is with simple operation and conducive to market popularization.

1. Brief introduction of project China is the world's largest producer and consumer of fresh table grapes. By 2021, the grape production has exceeded 14.5 million tons, and grape ear harvesting has become the most labor-consuming operation in the grape industry. Traditional grape harvesting relies on artificial AIDS, which cannot avoid problems such as low harvesting efficiency, increased labor cost and serious fruit breakage. Grape picking robot has high harvesting efficiency, low maintenance cost, autonomous navigation, which is the key solution of the unmanned harvesting operation of fresh table grapes.This achievement realized a series of intelligent key technologies, such as "hand-eye" fast large-tolerance positioning method,and "one-eye two-arm" high-speed parallel operation. By speculating fruit stem positioning and terminal clipping - grasping and grape ear harvesting was accomplished quickly. Multi-feature information of tree row and ear was integrated to form an autonomous start-stop navigation method for row, which realized high-speed harvesting and autonomous walking of the robot under the horizontal trellis of grapes.2. performance indicatorsThe success rate of picking is 92%; harvesting efficiency 700-800 ears/hour; the damage rate is less than 5%; the extraction rate is 90%. 3. Scope of application and market prospectMedium and large scale standardized horizontal trellised viticultural orchards.4. Investment estimateBased on technical cooperation requirements, make corresponding budget estimates.5. Means of cooperation(1) assignment of patent;(2) provide equipment and technology for special application scenarios;(3) technology improvement or technology research and development services for special needs. 

Brief introduction of project resultsWith the seriously rural labor loss and aging, fruit and vegetable harvesting robot has become a pain point in the current industry. The existing fruit and vegetable harvesting robot products on the market have some defects, such as low working efficiency (≤300 fruit/hour), single applicable fruit and vegetable varieties, lack of independent orchard walking ability and poor user experience.This achievement is about the visual servo, autonomous navigation module integration and complete research and development of a self-propelled human-type two-arm fruit and vegetable harvesting robot oriented to plane-oriented fruit and vegetable cultivation mode. Its advantages are as follows: (1) It has conquered the high speed visual servo operation barrier under the multi-eye two-arm hand-eye configuration, greatly improving the harvesting efficiency; (2) Suitable for grape, apple, kiwi, tomato and other types of flat orchard cultivation mode; (3) It is the adaptive navigation technology of multi-feature and multi-orchard, and improves the autonomous operation ability of the robot; (4) Integrated the leisure humanoid robot technology of transmembrane intelligent immersive interaction to optimize user experience.  performance indicators95% success rate of picking; harvesting efficiency: 1000 fruit/hour; the damage rate is less than 5%; the extraction rate is 90%.Scope of application and market prospectOrchard with grape, apple, kiwi, tomato and other large and medium-sized standardized orchard scene with planarization cultivation mode. Means of cooperation(1) assignment of patent;(2) Provide equipment and technical solutions for specific application scenarios;(3) Technology improvement or technology research and development services for special needs.

Background techniqueLithium-ion batteries have been widely used because of their advantages such as high energy density, good cycling performance, environmental protection and no pollution, and have become the preferred power battery for electric vehicles and hybrid electric vehicles. With the gradual development of electric vehicles and hybrid electric vehicles, higher requirements have been put forward for the performance of lithium-ion batteries, which need to have high energy density, good safety, low temperature performance and other advantages.At present, traditional lithium-ion batteries, such as lithium manganese acid battery, lithium iron phosphate battery and ternary battery, are difficult to meet the requirements of electric vehicles and hybrid electric vehicles due to their respective defects. For example, the conventional lithium-ion batteries mentioned above are difficult to meet the density requirements of lithium-ion batteries for electric vehicles due to their low specific energy (generally less than 120Wh/Kg). Therefore, it is necessary to develop new lithium-ion batteries with high energy density, good cycle performance and good safety performance.The lithium-ion battery prepared by LiNi0.5Mn1.5O4 attracted people's attention by high working voltage (4.7V) and high energy density (> 150Wh/Kg). However, in the process of using lithium ion batteries prepared by this material, people found that the decomposition of ordinary electrolyte is more serious due to its high charging and discharging voltage, so serious flatness phenomenon can be seen,also affecting its application and development.Content of inventionThe purpose of the invention is to solve the flatulence problem of the existing lithium ion battery and to provide an electrolyte which can effectively prevent the flatulence of the lithium ion battery in the process of charging and discharging.The present technical scheme is a kind of lithium ion battery electrolyte, including solvent, lithium salt and additives. The sum of solvent and additive mass is 100%, the sum of the quality of the mass fraction of the solvent for 90 95%, the lithium salt of amount of substance concentration of electrolyte is 0.9 1.4 mol/L, and the additive is one or both of ethyl sulfate and acrylic sulfite.Among them, the electrolyte for lithium ion battery of the invention can be obtained by directly mixing various raw materials.

Brief introduction of project resultsThe invention belongs to the field of irrigation and fertilization of agricultural and forestry crops and plants, and it relates to research, development and application of precise proportioning of agricultural biogas slurry.Biogas slurry irrigation can effectively replenish soil fertility and improve soil microbial diversity index, and the presence of plant growth hormones such as gibberellin in biogas slurry can promote plant growth. Therefore, biogas slurry irrigation can reduce the dependence of agricultural production on conventional water and fertilizer to a certain extent. However, the relevant technical equipment of biogas slurry returning to farmland is now the main factor limiting the reclamation of biogas slurry. The main methods of returning biogas slurry to farmland include diffuse irrigation, watering and spraying irrigation, etc. The common problem lies in the low degree of intellectualization and precision, which makes it difficult to accurately control the irrigation amount of biogas slurry in the actual process of returning biogas slurry to farmland. This poses a great irrigation risk to crop growth, soil quality and ecological environment.The invention provides research and development of precise ratio equipment of agricultural biogas slurry, and develops a set of precise ratio device and control system of biogas slurry to realize accurate and controllable ratio of biogas slurry. It can greatly improve the precision and intelligence of biogas slurry matching equipment, and guarantee the safety of returning biogas slurry to the field. Compared with the existing technology, it has better practical value and advantages.Performance indexThe clean water inlet flow of the agricultural biogas slurry precision mixing equipment is 1.5m3/h, the biogas slurry inlet is 1.5m3/h, the fertilizer outlet flow is 3.2m3/h, the pressure of the fertilizer outlet is 0.27MPa, the daily power consumption is 10.8KW~11.7KW, the concentration ratio error of nitrogen, phosphorus and potassium is within 10%, and the fluctuation range of electrical conductivity is within 5%. The overall ratio of equipment has high accuracy and stability.Scope of applicationThe invention is mainly applicable to sprinkler irrigation, micro-sprinkler irrigation and low-pressure pipe irrigation, such as the irrigation of rice, wheat, tea and other plants.Investment estimateInvestment conditions: mechanical design, ARM SCM system design, Internet of things, and other technical support conditions; or technology company/factory has electrical components, IT technical support, mechanical design and assembly conditions.Investment cost: calculating according to equipment structure innovation and control system establishment, requiring to design the appearance of equipment and carry out prototype trial production.Mode of cooperationThe cooperative development method requires the enterprise to provide funds and equipment, and we will develop the technology.