53results about How to "Full use of capacity" patented technology

The invention mainly relates to a method for preparing low temperature functional electrolyte of a lithium titanate (Li4Ti5O12) lithium-ion secondary battery. The functional electrolyte has the advantage that the electrolyte is suitable for high multiplying power exertion of lithium titanate material at the low temperature (-20 DEG C), thus having extreme property. The method comprises: compounding commercial electrolyte lithium salt LiPF6 and lithium salts (such as LiBF4, LiN(SO2CF3) 2 and LiODFB) with excellent low temperature property, and optimizing an electrolyte low temperature system byreducing or abandoning film-forming solvent EC with poor low temperature property and increasing low boiling point solvents such as PC, EA, THF and the like with the excellent low temperature property aiming at the characteristic of no SEI film of the Li4Ti5O12 battery. Meanwhile, a small quantity of additive is added to stabilize the interface stability of the lithium salts.

The invention discloses a preparing method for a silicon-carbon composite negative electrode material for a lithium ion battery. The preparing method includes the following steps that 1, flake graphite, a polymer solution and nanometer silicon dispersion liquid are evenly mixed, dried and carbonized in a protective atmosphere; 2, pitch and spherical graphite are mixed, ground, placed in an inert protective atmosphere, and subjected to heat treatment to obtain modified spherical graphite; 3, a binder, the modified spherical graphite and the mixed material obtained after carbonization in the step 1 are added into solvent, dispersed evenly and dried to obtain a precursor material; 4, the precursor material is carbonized to obtain the silicon-carbon composite negative electrode material. In the process of the preparing method, it is unnecessary to add special dispersant, nanometer silicon is evenly dispersed in the graphite by means of some ionic groups existing in the polymer solution and high viscosity, the polymer solution has certain stability, and the possibility of nanometer silicon aggregation in the drying process is reduced.

The invention provides a high-concentration electrolyte for a lithium ion battery. The electrolyte comprises lithium salt, a non-aqueous solvent and a wetting agent; the concentration of the lithium salt is higher than 2 mol / L; and the wetting agent is selected from fluoro-ether compounds. The wetting agent is added in the electrolyte, so that the viscosity of the electrolyte is reduced and the wettability is improved while the high concentration is ensured; the dynamic characteristic of the electrochemical reaction on the electrode / electrolyte interface is good, and the reaction polarizationis small. Therefore, the wetting agent is added in the electrolyte so that the safety of the electrolyte can be improved, the protection of an aluminum current collector is realized, the viscosity ofthe high-concentration electrolyte is reduced, and the problem of poor wettability of the electrolyte is solved; and the electrochemical stable voltage of the electrolyte exceeds 4.5V, so the electrolyte is suitable for a high-voltage positive electrode material; the capacity of the battery is fully played; and the energy density of the battery is improved.

The invention discloses an electrolyte for a lithium-ion power battery, which comprises lithium salts, organic solvents and additives, wherein the lithium salts comprise at least one of LiODFB, LiPF6, LiClO4, LiBF4, LiAsF6, LiCF3SO3, LiN(SO2CF3)2 and LiBOB; the invention also discloses a preparation of the electrolyte, which comprises the following steps: mixing the organic solvents after impurities and water are removed; (2) adding the lithium salts in the mixed organic solvents, evenly stirring till the solution is clear and has no sediments, and allowing the solution to stand for at least half an hour to obtain mixed solution; (3) adding the additives into the mixed solution, evenly stirring, and then allowing the mixed solution to stand to obtain the required electrolyte. The invention improves the cycle performance of the battery at the high temperature, prevents gas explosion caused by electrolyte decomposition, can remarkably promote the long-life function of the volume conservation rate of the lithium-ion power battery at the high temperature, and has simple preparation method and easy industrialization production simultaneously.

The invention discloses safe non-aqueous electrolyte for a battery. The electrolyte comprises a lithium salt, an organic solvent and an additive, wherein the organic solvent comprises a cyclic compound and chain carbonate; the cyclic compound comprises propylene carbonate and a cyclic phosphonitrile compound. The electrolyte takes a flame-retardant compound as a solvent, has high safety performance, low-temperature performance and high-temperature cycle performance and is safe electrolyte which can be used in a wide temperature range. Meanwhile, due to a matched synergistic effect of the solvent and the additive, the battery has high electrochemical performance, the capacity of a lithium ion battery using the electrolyte can be fully exerted, and the battery has excellent safety performance, high-temperature resistance, low-temperature performance and long cycle life.

The invention discloses a charging-discharging control circuit of a vehicular power battery pack, which at least comprises a flexible connection battery pack module 1, a data acquisition module 2 and a control module 3, wherein the flexible connection battery pack module 1 at least comprises a battery unit and a flexible connection unit. The charging-discharging control circuit disclosed by the invention realizes switching of single battery connection modes of the vehicular power battery pack under the charging and discharging conditions; when the vehicular power battery pack is charged, all single batteries are charged in a series connection mode, therefore low-current fast charging under high voltage is realized easily, and the charging speed is improved; when the vehicular power battery group is in a discharging state, the single batteries are connected in parallel and then connected in series, and thus the fault rate of the whole battery pack system is reduced; and the control circuit disclosed by the invention can ensure that the consistency of the single batteries in the battery unit is kept well, the optimal property of each single battery is expressed, the battery volume is fully utilized, the life of the battery pack is prolonged, and favorable practical application value is achieved.

The invention relates to a novel control method for improving lithium ion soft-package laminated battery diaphragm fold. The problem that the battery performance is influenced due to the fold of the soft-package laminated lithium ion battery diaphragm is solved. The control method comprises the following steps: laying down a battery after liquid injection, thereby ensuring that the electrolyte sufficiently infiltrates a pole piece; and then performing rolling on the lay-down battery, and controlling the pressure and speed of the rolling in the rolling process; pre-charging the battery after the rolling is ended; and performing secondary rolling on the completely pre-charged battery, further shaping the diaphragm, and releasing the gas to finish the secondary package. The contacting interface between a positive / negative pole piece and the diaphragm is better by comparing the lithium ion soft-package laminated battery prepared based on the control method with the battery without performing the rolling shaping, the dead lithium existing in the fold area caused by the diaphragm fold is avoided, thus the capacity of the positive / negative material is sufficiently played, and the batteryperformance is improved.

The invention provides a negative electrode of a secondary battery and a preparation method thereof, and the secondary battery. The negative electrode of the secondary battery is composed of a currentcollector and a lithium film and / or a lithium composite film located on one or both sides of the current collector, wherein the thickness of the lithium film or the lithium composite film is no lessthan 1 [mu]m and less than 40 [mu]m. The preparation method for the negative electrode of the secondary battery comprises a step of forming the lithium film and / or lithium composite film on one side or both sides of a current collector by vacuum plating. Films with different thicknesses can be plated directed at different battery systems so as to give full play to the capacity of metallic lithiumor a lithium composite material.

The invention relates to an SiOx / C / M composite material and a preparation method and an application thereof. The SiOx / C / M composite material is prepared from an SiOx material, a carbon material and an M component and is prepared through a simple, efficient, low-cost and pollution-free production technology on a large scale. The composite material is taken as a negative electrode material for a lithium-ion battery, so that the electrochemical properties of the SiOx negative electrode material are significantly improved; and the defects that the SiOx negative electrode material is extremely poor in conductivity, poor in capacity development and relatively low in initial coulomb efficiency are overcome.

The invention relates to the technical field of energy storage batteries, and discloses an aluminum ion battery and a positive electrode material CoxSy@MXene thereof. The positive electrode material is prepared by in-situ growth of micro-nano cobalt sulfide on an MXene matrix material, the micro-nano cobalt sulfide is CoxSy, x is greater than 0, y is greater than 0, and the mass of the micro-nanocobalt sulfide accounts for 5%-95% of the total mass of the positive electrode material. The positive electrode material is characterized in that: the nano micro-nano cobalt sulfide directly grows onthe MXene matrix material in situ, so that the dispersity of the nano micro-nano cobalt sulfide is improved, crystal grains are refined, the conductivity can be effectively improved, and the actual capacity of the micro-nano cobalt sulfide is fully exerted; and the synergistic effect of the MXene matrix and the micro-nano cobalt sulfide is exerted, and the specific capacity and the cycling stability of the aluminum ion battery are improved. The aluminum ion battery taking the material as the positive electrode has the advantages of low price, stable circulation, wide voltage window, cleanness,environmental protection, high safety and the like, and can be applied to the fields of electronic industry, communication industry, energy reserve and the like.

The invention discloses a clinical medicine entity identification method and a clinical test knowledge mining method, and the clinical test knowledge mining method comprises the steps of clinical medicine entity identification, clinical test argument mining and clinical test result reasoning. According to the method, on the basis of a BERT pre-model, further pre-training of abstract literatures of RCT is added, a text model in the clinical test field is obtained, entity category information is fused into model prediction, and the effect of a clinical test entity mining task is improved; in the information extraction stage, while a PICO entity is recognized, IC and an evidence sentence containing O are matched, then the logic relation of the IC and the O is judged, and the mask language model architecture of BERT is fully utilized for prediction.

The invention relates to a lithium titanate negative electrode material having a multistage carbon-clad network structure, and a preparation method and an application thereof. A novel conductive carbon material is doped in a TiO2 preparation process to achieve in-situ internal carbon doping in a lithium titanate raw material precursor, and the lithium titanate negative electrode material having the novel conductive carbon material doped therein and the multistage carbon-clad network structure clad by conventional carbon via external secondary carbon cladding synthesis. The lithium titanate negative electrode material having the multistage carbon-clad network structure provided by the invention can realize rapid charging and discharging at a large rate and fully exert the capacity of activesubstances in material particles, and is suitable for a lithium ion secondary battery electrode material.

The invention discloses an in-situ self-assembled nano-flower-like cobalt disulfide / rGO composite material and a preparation method and an application thereof. The in-situ self-assembled nano-flower-like cobalt disulfide / rGO composite material is obtained through steps that by adding GO solution to mixed solution of soluble cobalt salt solution and vulcanizing agent solution, and after stirring, ultrasonically, the obtained GO mixed solution is reacted in a stainless steel kettle at 150-280 DEG C, after cooling with the furnace, and the solid is obtained by freezing-drying treatment after suction filtration. The composite material has a nano-flower-like three-dimensional microstructure, nanoflowers are composed of single crystals of cobalt disulfide and grow in situ on a two-dimensional rGO nano sheet substrate, the substrate can effectively accommodate the volume effect of cobalt disulfide during charging and discharging and has good electrical conductivity, moreover, the composite material has excellent charging and discharging cycle performance and rate capability and can be applied in the field of lithium ion battery cathode materials.

The invention discloses a full-automatic electrolyte pressurizing impregnation device and method for an aluminum electrolytic capacitor. The device comprises am impregnation core bag pot, an electrolyte storage pot and a pressure pump, wherein the impregnation core bag pot and the electrolyte storage pot are connected with a secondary fluid pump through the pressure pump, the impregnation core bag pot is provided with a pressure gage, the upper end of the pressure pump is provided with a transducer, the upper end of the secondary fluid pump is provided with a pressure pump variable-frequency governor, the upper end of the pressure pump variable-frequency governor is provided with a controller, and the upper end of the controller is provided with an alarm lamp. When a capacitor core bag is impregnated, the method that self electrolyte is pressurized and permeated into the core bag is adopted. The device has small volume, saves occupied space, and lowers cost in equipment input and manufacture; and the method has the advantages of being low in impregnation temperature, more energy-saving and high in work efficiency, preventing impurities such as water and oil from polluting the electrolyte, and guaranteeing the electrical property stability and reliability of the aluminum electrolytic capacitor.

The invention provides a method and device for improving the wrinkles of a dry diaphragm of a lithium ion soft package laminated battery. The method comprises the following steps of A, assembling, baking and injecting liquid into a battery cell; B, carrying out first aging on the battery cell subjected to liquid injection; C, rolling the primarily aged battery cell main body, and controlling the rolling pressure and speed in the rolling process to ensure that the wrinkles in the MD direction of a PP diaphragm are fully shaped; D, carrying out secondary aging on the rolled battery; and E, manufacturing a finished battery from the secondarily aged battery cell according to a conventional process flow. The method is simple in process and is convenient to operate, and the wrinkles of the PP diaphragm in the battery cell in the MD direction are effectively eliminated by rolling the battery cell after liquid injection and before pre-charging back and forth in the direction perpendicular to the direction of a tab.

The invention discloses a negative active material for a lithium-ion battery. A chemical formula of the negative active material is FexSiOy / C, wherein x is smaller than or equal to 2 and greater than or equal to 2 / 3; and y is smaller than or equal to 4 and greater than or equal to 3. In addition, the invention further discloses a preparation method of the negative active material for the lithium-ion battery and the lithium-ion battery employing the negative active material. Compared with the prior art, the negative active material FexSiOy / C for the lithium-ion battery disclosed by invention has the advantages of high specific capacity, high cycling stability, low cost and the like; the preparation method is simple, convenient and feasible; the prepared FexSiOy / C is high in purity and excellent in electrochemical property; and the lithium-ion battery has the advantages of high energy density, long service lifetime, high safety and the like.

A battery management system of an electric automobile comprises a core data acquisition and protection center control unit (3) which acquires the parameter information of a direct-current power supply (1) and a Hall device (5) and controls and manages the parameters of the direct-current power supply (1), simultaneously, wherein a fuse and a main changeover switch (7) are used as a safety management unit, and the data acquisition and protection center control unit (3) receives alarm unit information switched over by a communication unit (9). The system of the invention can fully exert the capability of a battery and prolong the service life of the battery.

The invention provides a message forwarding method and device. The method comprises the following steps: receiving a service message which is packaged by a VXLAN and sent by TOR equipment; removing the VXLAN encapsulation, and when it is determined that the destination MAC address of the service message is the MAC address of the EOR device, determining a first VPN corresponding to the first service VLAN Tag according to the first service VLAN Tag carried in the service message; and searching a three-layer forwarding table entry in the first VPN according to the destination IP address of the service message, and carrying out three-layer forwarding on the service message according to a searching result. By applying the embodiment of the invention, the capability of the EOR equipment can be fully utilized, the functional complexity of the CE equipment is reduced, and network resources are saved.

The present invention is one method and apparatus to load and tamp coal in horizontal coking furnace. An improved coal bogie is used, which has movable connection, rather than fixed connection, to coal baffle, and two sets of replaceable coal baffle and coal supporting board and two damping platforms for distributing coal and damping coal are used, so as to perform coal loading and coal distributing and damping synchronously and circularly. The present invention has shortened operation period and raised apparatus utilization.

The invention discloses a forming method of a lithium ion battery, which is characterized by comprising the following steps of: (1) after fluid injection of the battery, under the condition that the temperature is between -10 and 35 DEG C, performing partial formation on the battery through low-current low-voltage section charge-discharge circulation; (2) performing high-current medium-voltage section fast charge-discharge circulation on the battery until the internal temperature of the battery reaches and keeps between 30 and 45 DEG C, and then performing local formation on the battery through low-current high-voltage section charge-discharge circulation; and (3) performing deep formation on the lithium ion battery through high-current deep charge-discharge circulation. All the steps arecarried out by using the same equipment at the same environmental temperature. After the formation by the method, the cathode surface SEI film of the battery is thinner, more compact and firmer, the stability of an electrode surface is effectively enhanced, an anode active material is fully used, the energy of the battery is high, the capacitive properties, the cycle performance, the rate capability and the safety performance of the battery are also improved, and simultaneously, the process is effectively simplified, the productivity is improved, and the equipment investment and the maintenance cost are reduced.

The invention discloses an electrostatically self-assembled three-dimensional flower-like cobalt disulfide / rGO composite material, and a preparation method and an application thereof. The composite material is prepared by carrying out heat preservation treatment on a mixed solution of a soluble cobalt salt aqueous solution and a vulcanizing agent aqueous solution at 150-280 DEG C, adding three-dimensional flower-like cobalt disulfide obtained after suction filtration and drying into a polydiallyldimethylammonium chloride solution, carrying out stirring, adding positively charged flower-like cobalt disulfide obtained after centrifugal washing into a GO aqueous solution, carrying out stirring and standing, carrying out centrifugal washing and freeze-drying, and heating an obtained solid to 500-700 DEG C in a protective atmosphere for calcining. According to the method, the three-dimensional flower-like cobalt disulfide is self-assembled on a rGO nanosheet substrate through an electrostatic action, so that the volume effect of the cobalt disulfide in the charging and discharging processes can be effectively accommodated, and the conductive performance is good. The composite material has excellent charge-discharge cycle performance and rate performance and high first coulombic efficiency.

The invention discloses a SiOC ceramic material used for preparing the cathode of a lithium ion battery, a preparation method thereof and a lithium ion battery prepared from the ceramic material. The SiOC ceramic material comprises silicon, oxygen and carbon, and the mol ratio of silicon to oxygen to carbon is 1: alpha: beta, wherein, alpha is 0.4 to 0.2, beta is 0.4 to 5.0, and alpha plus beta is 0.8 to 7.0. The preparation method comprises the following steps: preparing organosilicon polymers with a molecular formula of a(R1R2SiO)x(R3R4SiO2)y(R5R6SiO3)zb, wherein, a and b are terminated functional groups, R1, R2, R3, R4, R5 and R6 are functional groups, at least one of which is hydrogen groups or alkenyl groups, x is 0.3 to 1, y is 0 to 0.7, z is 0 to 0.5, and x plus y plus z is 1; preparing organic small molecular compounds which comprise active groups that can react with hydrogen groups, silanol groups or alkenyl groups; mixing the organosilicon polymers with the organic small molecular compounds, preparing the two into a copolymer through crossing and curing, and carrying out pyrolysis so as to obtain the SiOC ceramic material. The lithium ion battery provided in the invention has the characteristics of high capacity, good cycle performance and high reversible capacity.

The invention provides a negative electrode plate which comprises a current collector and a coating arranged on the surface of the current collector, the coating comprises at least two active layers and a porous diffusion layer arranged between the two adjacent active layers, the porosity of the porous diffusion layer is larger than that of the adjacent active layers, and the thickness of the porous diffusion layer is smaller than that of the adjacent active layer. According to the negative electrode plate with the structure, the porous diffusion layer with large porosity and thin thickness is introduced between the active coatings of the negative electrode plate, so that the overall energy density of the negative electrode plate is not influenced, the transmission of lithium ions in the coatings is facilitated, the high-rate charge-discharge performance of the battery can be improved, and the capacity of the active material in the negative electrode plate can be fully exerted, so that the energy density of the battery is further improved.

The invention relates to a difunctional electrolyte applicable to an embedded and conversion type lithium battery, a preparation method, and a lithium battery comprising the electrolyte. The electrolyte is formed by dispersing a multi-component ether type ionic liquid into a fluoro-ether type solvent; the positive ions of the multi-component ether type ionic liquid are a lithium ion chelate; freeof free-state ether or carbonic ester, a secondary reaction with graphite or polysulfide ions can be prevented effectively, so that the electrolyte can be applicable to an embedded type electrode material and a conversion type electrode material; by introducing fluoro-ether, the electrolyte viscosity is lowered, and meanwhile, electrochemical stability and thermal stability of the electrolyte arenot influenced; the initial charging efficiency can reach 80% or above, and after 100 cycles, the specific capacity has little loss; in addition, the electrolyte has high flame retardant effect, and high temperature performance and safety of the electrolyte are improved, so that joint use of the conversion type electrode material and the embedded type electrode material can be realized; and consequently, the battery energy density is improved, and battery cost is lowered.

The invention relates to an SiOx / C / M composite material and a preparation method and an application thereof. The SiOx / C / M composite material is prepared from an SiOx material, a carbon material and an M component and is prepared through a simple, efficient, low-cost and pollution-free production technology on a large scale. The composite material is taken as a negative electrode material for a lithium-ion battery, so that the electrochemical properties of the SiOx negative electrode material are significantly improved; and the defects that the SiOx negative electrode material is extremely poor in conductivity, poor in capacity development and relatively low in initial coulomb efficiency are overcome.

The invention relates to an electronic ticket selling method based on a block chain. The method comprises the following steps: setting a plurality of user nodes on a block chain network; and setting aticket management node on the blockchain network. The method also comprises the following steps: setting a cost management node on the blockchain network, wherein the cost management node is used forperforming cost setting and cost collection; and executing the following steps on the cost management node: a) setting an initial value of the user credit score as M score, wherein M is an upper limit; b) if the user performs the appointment once, accumulating N scores; c) if the user fails to keep an appointment for one time, deducting P score, wherein P = Q * the ticket selling rate of the current day, Q is a multiple and the ticket selling rate of the current day= sold ticket amount / available ticket total amount, and d) sequencing all user credit points, and then determining ticket buyingpriority according to the sequencing, so that the higher the sequencing of the user credit points is, the higher the ticket buying priority is. The invention further relates to an electronic ticketingsystem based on the block chain, electronic equipment and a storage medium.

A special motor for a circular weaving machine comprises a permanent magnet brushless direct-current motor or permanent magnet synchronous motor, a permanent magnet brushless direct-current motor or permanent magnet synchronous motor controller and a motor transmission system, wherein the permanent magnet brushless direct-current motor or permanent magnet synchronous motor controller comprises a control module, an angular position measuring unit, a speed obtaining and feedback module and an initial positioning module; the angular position measuring unit is used for measuring angular position signals of a stator and a rotor of the permanent magnet brushless direct-current motor or permanent magnet synchronous motor; the speed obtaining and feedback module is used for outputting a real speed signal of the permanent magnet brushless direct-current motor or permanent magnet synchronous motor and feeding the real speed signal back to the control module. Compared with a conventional alternating-current asynchronous motor, the motor has the advantages that the permanent magnet brushless direct-current motor or permanent magnet synchronous motor is adopted on the circular weaving machine, so that the motor has high efficiency, high power factor, good capacity index, small size, low weight and low temperature rise.

The invention discloses an electrolyte for a lithium-ion power battery, which comprises lithium salts, organic solvents and additives, wherein the lithium salts comprise at least one of LiODFB, LiPF6, LiClO4, LiBF4, LiAsF6, LiCF3SO3, LiN(SO2CF3)2 and LiBOB; the invention also discloses a preparation of the electrolyte, which comprises the following steps: mixing the organic solvents after impurities and water are removed; (2) adding the lithium salts in the mixed organic solvents, evenly stirring till the solution is clear and has no sediments, and allowing the solution to stand for at least half an hour to obtain mixed solution; (3) adding the additives into the mixed solution, evenly stirring, and then allowing the mixed solution to stand to obtain the required electrolyte. The invention improves the cycle performance of the battery at the high temperature, prevents gas explosion caused by electrolyte decomposition, can remarkably promote the long-life function of the volume conservation rate of the lithium-ion power battery at the high temperature, and has simple preparation method and easy industrialization production simultaneously.

The invention discloses a lithium ion battery formation method, which belongs to the technical field of lithium ion battery preparation. The formation method includes: step 1, after injecting the electrolyte solution into the lithium-ion battery, leaving the lithium-ion battery at room temperature for a first preset time; step 2, charging the lithium-ion battery obtained in step 1 with a first preset current Carry out staged charging, and measure the first open circuit voltage of the lithium-ion battery obtained; step 3, after the lithium-ion battery obtained in step 2 is placed in an environment with a preset pressure>0.1MPa for a third preset time, extract the obtained lithium ion Gas in the battery, and measure the second open circuit voltage of the lithium-ion battery obtained; step 4, compare the difference between the first open circuit voltage and the second open circuit voltage with the preset voltage, and compare the first open circuit voltage and the second open circuit voltage The lithium-ion battery whose second open-circuit voltage difference is smaller than the preset voltage is charged and discharged cyclically at the second preset current. The chemical conversion method can fully exert the capacity of the lithium-ion battery.

The invention relates to the technical field of food processing, and in particular to a low-sugar high-dietary fiber health cake. The cake is prepared from the following raw materials in parts by weight: 50 parts of tartary buckwheat flour, 7-11 parts of perilla seeds, 6.4-9.6 parts of xylitol, 0.1-0.2 part of baking powder, 9-13 parts of peanut oil, 0.2 part of table salt, 4 parts of white granulated sugar, 50 parts of water and 50 parts of eggs. The cake prepared by the invention contains a large amount of proteins, vitamins, fatty acids, amino acids, B vitamins and nutritional ingredients such as iron, calcium, magnesium, potassium, selenium, iodine and the like, can enhance intelligence and memory, protect eyesight, lower blood pressure, cholesterol and blood lipids, and further can significantly reduce the risk of atherosclerosis, cerebral thrombosis and cardiovascular diseases and many chronic diseases.