24results about How to "Guaranteed cycle performance" patented technology

The invention provides an electrolyte and a preparation method and application thereof, and relates to the technical field of lithium ion batteries. Specifically, the electrolyte comprises a lithium salt, a boric acid ester solvent, a carbonic ester solvent and a fluoro-ether diluent, wherein the boric acid ester solvent comprises at least one of a mixture of tripropargyl boric acid ester and a fluoro boric acid ester compound or triethyl borate. According to the invention, the technical defects of high viscosity, low solubility with a lithium salt, poor compatibility with a negative electrode and the like of a borate solvent can be effectively solved; by adopting the preparation process of two times of liquid injection and two times of formation, the prepared battery has good performance in the aspects of production efficiency, electrochemical performance, safety performance and the like, and has a good application prospect.

The utility model provides a cooling device for continuous quenching of aluminum foil, which comprises a cooling pond, a water inlet pipe and a water outlet pipe are respectively arranged on two sides of the cooling pond, and a filtering and cleaning device is arranged in the cooling pond through a fixing device. An electric telescopic rod is fixed to one side of the placement plate, a fixing block is fixedly connected to the output end of the electric telescopic rod, a cleaning brush is fixed to the bottom of the fixing block, a filter screen is fixedly arranged at the position, close to the water outlet pipe, of the inner wall of the cooling pond, and the cleaning brush is matched with the filter screen and the water outlet pipe in size; the filtering and cleaning device is arranged in the cooling pond, cooling water discharged from the water outlet pipe can be filtered and cleaned, residues generated in the aluminum foil quenching process are prevented from entering the water outlet pipe, the risk of blockage of the water outlet pipe is reduced, the cooling water circulation effect in the cooling pond is guaranteed, and the cooling efficiency of the cooling device is guaranteed.

The invention relates to the field of sodium ion batteries, and discloses a sodium vanadium phosphate composite positive electrode active material, a preparation method thereof and a sodium ion battery. The sodium vanadium phosphate composite positive electrode active material comprises a sodium vanadium phosphate inner core and a carbon coating layer coating at least part of the surface of the sodium vanadium phosphate inner core; and the compaction density of the sodium vanadium phosphate composite positive active material is greater than 1.8 g / cm < 3 >. When the positive electrode active material with relatively high compaction density is applied to the sodium ion battery, the diffusion path of sodium ions can be reduced, the energy density of the battery is improved, the discharge capacity of the battery is increased, the internal resistance of the battery is reduced, the polarization loss is reduced, the voltage platform of the battery is improved, and the rate capability and the cycle performance of the battery are ensured.

The invention discloses a gel sodium-ion battery electrolyte and a preparation method and application thereof, and belongs to the technical field of sodium-ion batteries, the preparation method comprises the following steps: adding a polyvinylidene fluoride-hexafluoropropylene copolymer into an organic solvent, and stirring to obtain a polyvinylidene fluoride-hexafluoropropylene copolymer solution; adding ethoxylated trimethylolpropane triacrylate, an initiator and an olefinic acid ester monomer into the polyvinylidene fluoride-hexafluoropropylene copolymer solution, and stirring at room temperature to obtain a mixed solution; carrying out a cross-linking reaction on the mixed solution under ultraviolet irradiation, and curing the obtained reaction solution into a transparent film; and drying the transparent film in vacuum, and soaking in an electrolyte to obtain the polybasic olefin acid ester molecule copolymerization gel electrolyte. The gel sodium-ion battery electrolyte disclosed by the invention has good thermal stability, mechanical strength performance and ionic conductivity, and the electrochemical performance and cycling stability of a sodium-ion battery are improved.

The utility model relates to the technical field of crawler belt forming, and discloses an internal lock structure derailing prevention rubber crawler belt forming device which comprises a device frame, a lower die is fixed to the lower end in the device frame, and a cooling mechanism used for cooling raw materials is arranged on the right side of the device frame. An ejection mechanism used for ejecting a workpiece is arranged in the lower die, a hydraulic cylinder is fixed to the upper surface of the device frame through bolts, and an upper die is fixed to the portion, penetrating through the device frame, of the telescopic end of the hydraulic cylinder. Cooling liquid is pumped out through the submersible pump and conveyed into the installation piece, the cooling liquid enters the flowing cavity in the lower mold through the heat dissipation pipe and the conveying pipe, the lower mold absorbs heat of raw materials and transmits the heat into the cooling liquid, then the raw materials are indirectly cooled, the forming efficiency of the raw materials is improved, and the production cost is reduced. And the cooling liquid continuously flowing into the flowing cavity can enter the water storage tank again to be recycled.

The present application relates to an electrochemical device and an electronic device including the same. The electrochemical device includes an electrolyte, a positive electrode and a negative electrode, wherein the negative electrode includes a negative electrode active material layer, the negative electrode active material layer includes a negative electrode active material, the electrolyte includes fluoroethylene carbonate, the mass of the fluoroethylene carbonate corresponding to 1g of the negative electrode active material is Ag, and the specific surface area of ​​the negative electrode active material is Bm. 2 / g, and the value range of A is 0.01 to 0.1. The present application aims to maintain the cycle performance of the electrochemical device while improving its fast charging performance.

The utility model discloses dynamic pickling equipment for food pickling, which comprises a barrel and a barrel cover, a saline water circulating mechanism is arranged on the side surface of the barrel, a spiral electric heating wire is arranged on the inner wall of the barrel, and a connecting mechanism is arranged in a sliding chute below the barrel cover; the connecting mechanism comprises a two-way lead screw arranged in the sliding groove, a sliding block is connected to the two-way lead screw in a threaded mode, a buckle is arranged at the bottom of the sliding block and can be clamped into the clamping groove in the side face of the barrel body, and a driving mechanism is arranged on the two-way lead screw. The food pickling barrel is scientific and reasonable in structural design, the problem of non-uniform food pickling caused by brine standing can be avoided, the food pickling effect is improved, the connection stability of the barrel cover and the barrel body can be effectively guaranteed, and the protection effect in the inner food pickling process is improved.

The present invention is a recyclable silicon wafer chemical mechanical polishing liquid, comprising silica sol abrasive, surfactant, deionized water, pH regulator A, and pH regulator B, wherein the components are respectively as follows by mass percentage: silica sol abrasive: 15-25%; pH regulator A: 1%-3%, which is a quaternary ammonium base; pH regulator B: 5%-15%, which is one or more of primary amine base, secondary amine base, and tertiary amine base; surfactant: 0.01%-0.1%, which is a nonionic surfactant; and the balance is deionized water. The removal rate of the polishing liquid is above 0.9 μm / min, and the removal rate after eight cycles is still above 0.8 μm / min, and the attenuation rate is controlled within 8%, which can be recycled multiple times under the premise of high removal rate.

The application belongs to the technical field of lithium ion batteries, and discloses a ternary high-nickel lithium ion battery nonaqueous electrolyte and a lithium ion battery. The ternary high-nickel lithium ion battery nonaqueous electrolyte comprises a nonaqueous organic solvent, an electrolyte lithium salt and a film-forming additive, the film-forming additive comprises a phosphate compound, and the structural formula of the phosphate compound is shown as formula (I): wherein, the substituents R1 and R2 are each independently selected from alkyl, alkenyl, alkinyl, fluoroalkyl and cyano with 1-4 carbons. The ternary high-nickel lithium ion battery nonaqueous electrolyte of the application has high energy density and high safety performance through optimization of the formula and under the joint action of a unique combination of multiple components, and meets the demand of high-nickel positive electrode batteries for cycle performance in the electrolyte adaptation angle.

The utility model discloses a single battery, a battery pack and an electric device, and relates to the technical field of batteries. The single battery comprises a shell, a battery cell and a first bus piece, the shell is provided with a containing cavity with one open end. The battery cell is arranged in the accommodating cavity, and a first tab is arranged at one end, facing the opening, of the battery cell; the first confluence piece is arranged in the containing cavity and comprises a first connecting part, a second connecting part and a third connecting part, the first connecting part is arranged on the bottom wall of the shell and extends towards the side wall of the shell, and the second connecting part is connected with the first connecting part and the third connecting part; the second connecting part is arranged on the side wall of the shell and extends towards the opening, the third connecting part is arranged at one end, close to the opening, of the battery cell and extends towards the direction far away from the side wall of the shell, and one side, far away from the opening, of the third connecting part is connected with the first tab. According to the single battery provided by the invention, the stability and the reliability of electric connection between the first tab and the first bus piece are improved, and the conductivity of the single battery is guaranteed.

The utility model discloses a lithium battery pole piece transfer device. The lithium battery pole piece transferring device comprises a magnetic attraction piece and a fixing piece, the magnetic attraction piece is connected to the fixing piece and at least used for attracting lithium battery pole pieces through magnetic force, the fixing piece is provided with a first movable part and a second movable part, and the driving unit is connected with the first movable part and drives the fixing piece to move in the first direction. The driving unit is connected with the second movable part and drives the fixing piece to move in the second direction, and the first direction and the second direction intersect. According to the utility model, the magnetic attraction piece is arranged and the lithium battery pole piece is attracted by utilizing the on-off of magnetism, so that the condition that the cycle performance of the battery is influenced and even the battery is short-circuited because the surface of the pole piece is easy to bulge when the pole piece is grabbed in a negative pressure pumping manner is effectively avoided, and the flatness of the surface of the pole piece is further ensured when the pole piece is grabbed; the cycle performance of the battery is ensured, and in addition, the structure is greatly simplified.

The utility model provides a cylindrical battery cell. The cylindrical battery cell comprises a shell, an electrode assembly and a core rod, the electrode assembly is installed in the shell in a sealed mode and provided with a center hole. The core rod is at least partially arranged in the center hole, and the side wall of the core rod at least partially abuts against the hole wall of the center hole; wherein the core rod comprises a sealing cavity for accommodating electrolyte and a weak part, the sealing cavity comprises a cavity wall, the weak part is arranged on the cavity wall, and the weak part is broken when the internal pressure of the shell is greater than a set threshold value, so that the electrolyte in the sealing cavity is in contact with the electrode assembly. The cylindrical battery cell provided by the utility model can improve the technical problem that the cycle performance and the service life of the cylindrical battery cell are reduced due to the fact that the cylindrical battery cell is easy to lack of liquid in the recycling process.

The invention provides a long-life and high-safety semi-solid battery and a preparation method thereof, and belongs to the technical field of semi-solid batteries. The method comprises the following steps: injecting an electrolyte A into a baked battery cell, and performing high-temperature activation and high-temperature formation; injecting the formed battery cell into the electrolyte B, and carrying out high-temperature aging; injecting the aged battery cell into the electrolyte C, sealing, and standing at normal temperature; and carrying out high-temperature polymerization and capacity grading to obtain the product. A three-time liquid injection process is adopted, the monomer and the initiator are separately arranged in the first injection and the third injection, non-uniformity caused by polymerization of the monomer and the initiator in the transportation process and the infiltration process can be prevented, the monomer and the initiator are not added in the second injection, it is guaranteed that the second injection is sufficient in vinylene carbonate VC, and the cycle performance is guaranteed; and an initiator is added during third injection, and the third injection does not contain lithium salt, so that infiltration is promoted, and the polymerization uniformity is ensured. The semi-solid energy storage battery prepared by the invention has the characteristics of long service life and high safety performance.

The utility model relates to a soft package battery structure, which comprises a battery body, and the battery body comprises a battery cell and a soft package shell covering the periphery of the battery cell; the exhaust and liquid supplement pipe is connected with the battery body, a liquid injection and exhaust hole is formed in the exhaust and liquid supplement pipe, and an exhaust buffer port is formed in the liquid injection and exhaust hole; and the exhausting and liquid supplementing cover is detachably connected with the exhausting and liquid supplementing pipe, and the exhausting and liquid supplementing cover and the exhausting and liquid supplementing pipe are connected in a sealed mode to block the liquid injection and exhausting hole. According to the soft package battery structure disclosed by the invention, the battery body is additionally provided with the exhausting and liquid supplementing pipe, and the exhausting and liquid supplementing pipe can be used for exhausting gas in time according to the appearance of the soft package battery, so that the safety problems of liquid leakage and even thermal runaway caused by gas expansion of the soft package battery are avoided; and secondly, the gas in the soft package battery is discharged, so that good interface contact of the battery cell is favorably kept, and the stable operation of the battery is ensured. And the additionally arranged exhaust liquid replenishing pipe can be used for carrying out lossless liquid replenishing on the battery, so that the cycle performance of the battery can be maintained.

The utility model relates to terminal device technical field, and disclose a kind of terminal device of electromagnetic compatibility design, including device shell, the lower end of device shell is equipped with the heat dissipation mechanism for the heat dissipation of device inside, the right side of heat dissipation mechanism is equipped with the cooling mechanism for cooling coolant;The heat dissipation mechanism includes liquid storage tank, the lower surface of device shell is welded in the liquid storage tank, the inside of liquid storage tank is fixed with submersible pump by screw, the output end of submersible pump is communicated with conveying pipe, the terminal of conveying pipe is communicated with the heat conduction plate fixed in the inner wall of device shell.The utility model passes through insulating heat-conducting pad and transfers heat to heat conduction plate, and coolant absorbs heat in heat conduction plate, to realize the effect of indirectly cooling electronic parts, through the cooling fan on mounting plate, cooling fin can be blown, to improve the cooling effect of coolant, guarantee the effect of subsequent circulation.

This invention discloses a lithium-sodium hybrid ion battery and battery pack. The lithium-sodium hybrid ion battery includes: a positive electrode, a negative electrode, an electrolyte, and a lithium-ion exchanger. The positive electrode contains a sodium-ion positive electrode material; the negative electrode contains a lithium-ion negative electrode material; the electrolyte is a lithium-ion battery electrolyte; the lithium-ion exchanger is disposed on or in at least one of the positive electrode, the negative electrode, and the separator, and is used to replenish lithium ions in the electrolyte during battery charging and discharging. By incorporating a lithium-ion exchanger to replenish lithium ions in the electrolyte during charging and discharging, the lithium intercalation capacity of the negative electrode and the overall capacity of the cell are improved, solving the problem that the actual capacity of commercial lithium-sodium hybrid ion batteries is far lower than the design value due to insufficient lithium-ion supply in the electrolyte.

The invention relates to a polymer electrolyte composition and a preparation method and application thereof, and belongs to the technical field of methods or devices for directly converting chemical energy into electric energy. The polymer electrolyte composition comprises a polymeric monomer, an initiator I, an initiator II and a lithium salt, the polymeric monomer is composed of 1, 3-dioxolame and fluoroethylene carbonate; the initiator I is an initiator of 1, 3-dioxolane, and the initiator II is an initiator of fluoroethylene carbonate. Polyelectrolyte formed by polymerizing the polymer electrolyte composition has good self-repairing performance and flame retardance, and a battery cell prepared from the polymer electrolyte has excellent cycle performance and high safety.

The utility model relates to the technical field of humidifiers and discloses a corrosion-resistant low-wind-resistance evaporative humidifier which comprises a water collecting tank, a mounting frame is fixedly connected to the top of the water collecting tank, an air inlet adjusting assembly is arranged on one side of the mounting frame, and a filtering and cleaning assembly is arranged on one side of the top of the water collecting tank. The filtering and cleaning assembly is arranged on the side away from the air inlet adjusting assembly. According to the device, the wind speed directly acting on one side of an evaporation medium is reduced through the wind shield, the situation that the wind speed is too large, and consequently the tension of a water source on the surface of one side of the evaporation medium is affected is prevented, and then the situation that the use performance of the device is affected is prevented; and the rack drives a plurality of gears, a plurality of second rotating shafts and a wind shield to rotate at the same time, so that the use angle of the wind shield is adjusted, and the flexibility and applicability of the equipment in the use process are improved.

The invention discloses a method and a device for measuring distribution of an adhesive of a coated pole piece, and belongs to the technical field of coated pole pieces, the method for measuring distribution of the adhesive of the coated pole piece comprises the following steps: sequentially stripping the adhesive of a measurement sample for multiple times, and obtaining the weight of the measurement sample before and after stripping; and determining the distribution uniformity of the adhesive in the coated pole piece according to the weight of the measured sample before and after stripping. According to the weight of the measured sample before and after stripping, the distribution uniformity of the adhesive in the coated pole piece is determined, so that a technician can master the distribution condition of the adhesive in a material area of the coated pole piece in advance, coating parameters are adjusted in time, and the product yield is improved.

The invention discloses a composite negative electrode, a lithium battery and a preparation method thereof, the composite negative electrode comprises a negative electrode current collector, a first active layer and a second active layer, the first active layer comprises a first graphite material; the second active layer comprises a second graphite material and a silicon material; 3.3 < = height-to-width ratio gamma1 * volume median particle diameter D150 < = 7.5 of the first graphite material; the height-width ratio of the second graphite material is gamma2, the volume median particle size of the second graphite material is D250, the volume median particle size of the silicon material is D350, mu = D350 / D250, alpha = (mass of the second graphite material / mass of the total active material) / (mass of the silicon material / mass of the total active material), and 0.3 < = mu * gamma2 * alpha < = 6. According to the invention, the cycle performance and fast charge performance of the lithium battery are ensured while the energy density is improved.

The present invention provides a composite positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a core material with a solvent to obtain a suspension, stirring the suspension and adding an iron source and a precipitant to react; (2) mixing the material obtained by the reaction in step (1) with a lithium source, and sintering the mixture to obtain the composite positive electrode material. The composite positive electrode material obtained by the method of the present invention has high thermal stability, can effectively improve manganese dissolution, increase material conductivity, and improve material rate performance and cycle performance.

The present application relates to an electrolyte precursor and a preparation method thereof, a battery and a preparation method thereof, wherein the electrolyte precursor comprises a lithium salt, an ionic liquid and a prepolymer; the ionic liquid comprises at least one of a piperidinium ionic liquid containing hexafluorophosphate, a piperidinium ionic liquid containing tetrafluoroborate, a pyrrolidinium ionic liquid containing hexafluorophosphate, and a pyrrolidinium ionic liquid containing tetrafluoroborate. In this way, the electrochemical stability and interfacial chemical stability of the gel electrolyte can be improved, thereby effectively improving the cycle performance and safety performance of the battery.

The invention discloses a preparation method and application of a Prussian blue material, and belongs to the field of batteries, the preparation method of the Prussian blue material comprises the following steps: S1, taking 0.1-5 mol / L of a ferricyanide complex and 0.1-5 mol / L of thiosulfate, placing the ferricyanide complex and the thiosulfate in 0.1-5 mol / L of an acid solution, stirring until the ferricyanide complex and the thiosulfate are dissolved to form a solution, S2, carrying out a hydrothermal reaction on the solution in the step S1 under the conditions of 60-150 DEG C and 1-3 MPa for 12-24 h, and S3, carrying out filtration, washing and drying to obtain the Prussian blue material. And S3, after the hydrothermal reaction is finished, cooling to room temperature, filtering and drying to obtain the Prussian blue material. The thiosulfate is added in the preparation process, so that residual cyanogen groups in the reaction process are synchronously eliminated, and an inevitable by-product hydrogen cyanide in the production process of a single iron source method is eliminated, so that the atmosphere in the reaction is ensured, the wastewater after the reaction is safer, and the requirement of safe production is met; the environment cost in the production process is reduced, and the personnel safety is ensured.

This invention relates to an anode material, its preparation method, and its application. The anode material comprises carbon nanotubes and a silicon layer coating the carbon nanotubes. The anode material of this invention can reduce the resistance of the anode sheet, improve rate performance, and further alleviate the volume expansion problem. Furthermore, by combining single-walled and multi-walled carbon nanotubes, the anode material possesses a richer microporous and mesoporous structure, which can further provide a buffer gap for silicon expansion. Moreover, by configuring the carbon nanotubes to include both single-walled and multi-walled carbon nanotubes, a highly efficient conductive network can be achieved, resulting in high conductivity and further improving the rate performance of the anode sheet.