19results about How to "Guaranteed conductivity" patented technology

The invention discloses a method for designing and preparing an ultrathin conducting layer of a micro-hemispherical resonator gyroscope. The method comprises the following steps: obtaining thin film thickness distribution data of the inner surface of a micro-hemispherical resonator; calculating the deformation energy of each region of the micro-hemispherical harmonic oscillator, and enabling the region of which the proportion of the deformation energy to the whole body is smaller than a first threshold value on the micro-hemispherical harmonic oscillator to be a region A, and enabling the others to be a region B; based on the relation curve of the resistivity and the film thickness, the film thickness r corresponding to the inflection point of the resistivity is obtained; the film thickness rA of the area A and the film thickness rB of the area B are equal to a * r and b * r, and a and b are the maximum values of the film thickness ratio of the plane area to the area A and the area B; and carrying out performance detection after coating the inner surface of the micro-hemispherical harmonic oscillator based on the rA and the rB, and iterating the rB until the rB passes the performance detection. The method is applied to the technical field of micro electro mechanical systems, and can reduce the thickness of the film in an area with a larger deformation energy ratio of the micro-hemispherical harmonic oscillator on the premise of ensuring the conductivity of the metal film, thereby achieving the purpose of improving the performance.

The invention relates to a lithium ion battery electrolyte additive 2, 4-dicarboxamido sulfonyl cyclobutanone and a corresponding high-temperature lithium ion battery electrolyte. The electrolyte comprises the following components: lithium salt, an anhydrous organic solvent and an electrolyte additive; wherein the electrolyte additive comprises 2, 4-dicarboxamido sulfonyl cyclobutanone, and the electrolyte additive comprises 2, 4-dicarboxamide sulfonyl cyclobutanone; the use amount of the 2, 4-dicarboxamido sulfonyl cyclobutanone in the electrolyte is 0.1%-10% of the total mass of the electrolyte. The high-temperature lithium ion battery electrolyte added with 2, 4-dicarboxamidosulfonyl cyclobutanone can improve the high-temperature discharge performance, the high-temperature charge performance, the high-temperature cycle performance and the safety performance of a lithium ion battery when the lithium ion battery works at 4.2 V, does not influence the first efficiency and the rate capability, and has a relatively good application prospect in a high-temperature system.

The invention belongs to the technical field of electrochemistry, and discloses a PEM membrane electrode testing system capable of realizing online purification and conductivity monitoring. The structure is as follows: a test fixture is provided with three lines which are respectively connected with a water storage tank, an oxygen-water separation tank and a hydrogen-water separation tank, the water storage tank is additionally provided with a circulating line, the circulating line is sequentially provided with a conductivity meter, a circulating pump a and a deionization filter, and a PEM electrolytic bath is clamped in the test fixture. Through the design of the circulating water path control flow, online purification and real-time monitoring of the conductivity of the circulating water are realized, so that the conductivity of the circulating water is ensured to meet the test requirements of the PEM membrane electrode.

The invention discloses a method for increasing the heat-resistant temperature of a pure aluminum conductor, and belongs to the technical field of performance improvement of the pure aluminum conductor. The method adopts a powder extrusion sintering process, and specifically comprises the following steps: carrying out high-energy ball milling on pure aluminum powder by taking ethanol and / or dry ice as an anti-forging agent to obtain superfine pure aluminum powder with the average grain size of 100-250 nm, clean surface and high activity, carrying out isostatic pressing on the superfine pure aluminum powder to obtain a preformed blank, and carrying out hot extrusion sintering on the preformed blank to obtain a high-strength aluminum rod, and carrying out front end grinding, deflashing, heat treatment, wire drawing and annealing treatment on the high-strength aluminum rod to obtain the pure aluminum conductor. The pure aluminum conductor has the beneficial effects that the prepared pure aluminum conductor is high in yield strength and tensile strength, the heat-resistant temperature is increased to 300 DEG C from 200 DEG C at present, and the pure aluminum conductor is a high-strength extra-heat-resistant pure aluminum conductor and is expected to be applied to extra-high voltage transmission line construction on a large scale.

This utility model discloses a warp-knitted fabric, relating to fabric technology. The key technical points are: it includes a base layer, which is woven from GB1 and GB2 guide yarns to form a warp-knitted mesh structure. The diameter of the GB1 guide yarn is larger than that of the GB2 guide yarn, and short fibers are provided on the outer periphery of the GB1 guide yarn. A moisture-wicking yarn is added to the base layer, spanning the warp-knitted mesh structure. The warp-knitted mesh structure of this utility model effectively ensures the fabric's breathability, and the moisture-wicking yarn effectively transfers excess sweat to drier areas of the base layer, thus ensuring better sweat absorption and improving fabric comfort. The moisture-wicking yarn, made from twisted C-shaped polyester fibers, further enhances its ability to transfer excess sweat.

This invention belongs to the field of lithium-ion battery technology, and relates to a flame-retardant gel electrolyte, its preparation method, and a lithium-ion battery. The flame-retardant gel electrolyte is a gel structure in which a three-dimensional cross-linked network encapsulates the electrolyte. The three-dimensional cross-linked network is formed by in-situ polymerization of fluoroacrylate, octavinyl-POSS, and methylenebisacrylamide. The three-dimensional cross-linked network formed by the in-situ polymerization of fluoroacrylate, octavinyl-POSS, and methylenebisacrylamide encapsulates the electrolyte, making it less prone to leakage and improving the flame-retardant effect of the gel electrolyte. Simultaneously, the three-dimensional cross-linked network structure provides a structural basis for ion transport, ensuring ionic conductivity.

The invention relates to the technical field of solar cells, and provides a cell electrode printing method, a back contact cell and a photovoltaic module. The method comprises the steps that a screen printing plate is not changed, an N-type auxiliary grid and a P-type auxiliary grid are firstly printed, a main grid is finally printed, main grid printing is a sequence of overlapping and printing the main grid in three working procedures, and a composite electrode structure is formed on the back face of the battery. According to the invention, the step effect of the auxiliary grid printing can be eliminated and the forming uniformity of the main grid can be optimized through the matching of the printing sequence of the first auxiliary grid and the multi-channel main grid, so that the line width of the auxiliary grid is effectively reduced, the height-width ratio is improved by about 3-5%, the unit consumption of silver paste is saved by about 5-10% under the condition that the design line width of the screen printing plate is not changed, and meanwhile, a foundation is laid for 1-3 mu m lower detection of the design line width of the screen printing plate; and the series resistance and electrode shading loss can be effectively reduced.

The utility model relates to the technical field of vaporizers, in particular to a circulating mechanism of a liquid oxygen condensing system. According to the technical scheme, the device comprises a shell, a supporting frame, a liquid conveying pipe and a connecting ring, the liquid conveying pipe is inserted into one side of the inner wall of the shell, the supporting frame is installed on one side of the inner wall of the shell, a threaded rod is rotatably installed in the supporting frame, a connecting block is arranged on the outer wall of one side of the threaded rod, and a connecting plate is installed on the outer wall of one side of the connecting block; by arranging the motor body, the connecting rings and the scraping plate, the effect of cleaning the outer wall of the liquid conveying pipe is achieved, the cleanliness of the outer wall of the liquid conveying pipe is guaranteed, the conduction effect of the liquid conveying pipe on temperature is guaranteed, and the temperature rising efficiency of liquid oxygen is guaranteed.

The invention relates to an aluminum alloy, which comprises the following components in percentage by weight: 0.002 to 0.02 percent of B, 0.50 to 0.60 percent of Si, 0.60 to 0.70 percent of Mg, less than or equal to 1.3 percent of (Mg + Si), 1.16 to 1.25 percent of Mg / Si and the balance of Al. 0.02 to 0.03 percent of Er (Erbium); 0.02 to 0.03 percent of Y; 0.08 to 0.10 percent of Fe; (Cr + Mn + V + Ti) < = 0.008%, and the balance aluminum and inevitable impurities. Impurities are removed by adding a proper amount of B element, so that the conductivity of the obtained material is improved; the tensile strength is improved by adding a proper amount of Mg element; the tensile strength and the heat treatment strengthening performance of the aluminum alloy are improved by adding a proper amount of Si element and controlling the ratio of silicon to magnesium; the refining of the grain size is realized by adding the elements Er and Y; the conductivity is improved by reducing the content of four impurity elements of V, Mn, Cr and Ti; through improved homogenization treatment and aging treatment, the strength of the aluminum alloy is improved, and the conductivity of the aluminum alloy is also ensured, so that the high-conductivity and high-strength aluminum alloy with good comprehensive performance is obtained.

The invention discloses a low-carbon GIS (Gas Insulated Switchgear) mixed gas mixing ratio detection method, relates to the technical field of gas detection, and solves the technical problem that the to-be-detected mixed gas possibly contacts with oxygen, so that oxygen exists in a gas cylinder, and the detection of the mixing ratio is not accurate enough. The method comprises the following steps: collecting GIS mixed gas, and transmitting the GIS mixed gas to a mixing ratio detection device; whether oxygen exists in the GIS mixed gas or not is analyzed based on a mixing ratio detection device, and if yes, the oxygen content in the GIS mixed gas is analyzed; if not, analyzing the mixing ratio of the GIS mixed gas; introducing the GIS mixed gas reaching the standard into a humidity detection module; analyzing the humidity of the GIS mixed gas by adopting a resistance-capacitance method; calling the conductivity analysis model to analyze the conductivity of the GIS mixed gas; adjusting the mixing ratio of the GIS mixed gas based on the conductivity; and the detection accuracy can be improved.

This invention relates to the technical field of high-end voice coil motor spring preparation methods, specifically to a method for preparing CuTi alloy strip based on ultrasonic-assisted solidification and liquid nitrogen cold rolling. The specific process is as follows: ingredient preparation, determining the approximate content range of each element in the copper-titanium alloy; vacuum induction melting; ultrasonic vibration by applying ultrasonic fields of different power during alloy melting and solidification; solution treatment of the obtained copper-titanium alloy ingot, followed by water cooling; liquid nitrogen cold rolling, during which the copper-titanium alloy plate remains in a low-temperature environment to obtain a high-density nanotwinned structure; and aging treatment of the copper-titanium strip in a vacuum atmosphere furnace to obtain the final copper-titanium alloy strip. This invention solves the problem in existing methods where copper-titanium alloy ingots are prone to compositional segregation and coarse primary phase structures, leading to microstructural inheritance during subsequent deformation, thus hindering the synergistic improvement of the strength and conductivity of the copper-titanium alloy strip.

The present invention relates to a circulation device for online monitoring and sampling of pure steam, which comprises a sampler and a circulation pipe. The sampler comprises a shell, the interior of which is a hollow first cavity. A conductivity cell is arranged in the first cavity. The shell comprises a top and a bottom arranged opposite to each other. The top of the shell is used to pass pure steam or condensed water formed by pure steam. The conductivity cell is arranged toward the top to receive condensed water. The circulation device for online monitoring and sampling of pure steam can prevent the condensed water remaining in the conductivity cell and the first cavity from breeding microorganisms due to long-term shutdown, and prevent the conductivity probe from monitoring the conductivity of the residual condensed water and causing the equipment to alarm, so as to ensure that the monitored condensed water conductivity can well represent the purity of pure steam. In addition, the conductivity cell can be filled with condensed water in a relatively short time, so that the conductivity probe can obtain a stable indication in a relatively short time.

The present invention discloses a belt-type sludge low-temperature drying device utilizing waste heat, comprising a heat-insulating sealed frame, a filtering and condensing device, a heat-exchanging and evaporating device, and a circulating fan, wherein the heat-insulating and sealed frame defines a left installation area and a right installation area, wherein the left installation area and the right installation area are sealed and separated by a heat-insulating partition, wherein a first through hole is provided at the top of the heat-insulating partition, and a second through hole is provided at the bottom of the heat-insulating partition, wherein the filtering and condensing device is installed in the left installation area, and the heat-exchanging and evaporating device is installed in the right installation area. The present invention separates the condenser in the filtering and condensing device from the heat exchanger in the heat-exchanging and evaporating device by providing a heat-insulating and sealed frame, thereby ensuring that the moisture in the hot and humid air is condensed and liquefied to form humid and cold air, and at the same time ensuring the heat conduction effect, thereby improving energy utilization and reducing costs.

The invention belongs to the technical field of lithium ion batteries, and discloses a single crystal positive electrode material for a lithium ion battery, nickel cobalt lithium manganate is used as a matrix, the surface of the matrix is coated with composite fluoride LiCoNxFy, x is more than or equal to 0.2 and less than or equal to 5, y is more than or equal to 4 and less than or equal to 8, the composite fluoride accounts for 1-5 mol% of the matrix, and a proper amount of protective layer can ensure that the matrix is uniformly and compactly covered, so that the single crystal positive electrode material is prepared. And meanwhile, the integrity of the alpha-NaFeO2 type layered structure of the matrix is kept. The invention also discloses a preparation method, double coating of NFn and LiCoF3 is realized through a three-step sintering process, and the prepared single crystal positive electrode material still keeps a complete alpha-NaFeO2 type layered structure. The invention also discloses a lithium ion battery composed of the single-crystal positive electrode material for the lithium ion battery.

The invention discloses a high-voltage stable electrolyte and a lithium battery, and relates to the technical field of lithium batteries, the high-voltage stable electrolyte comprises an organic solvent, a lithium salt and an additive, the organic solvent comprises sulfate modified toluenesulfonyl and a carbonic ester compound; the additive comprises 3-bromofuran and a diluent; a preparation process of the sulfate modified toluenesulfonyl specifically comprises the following steps: preparing hydroxytoluene sulfone; the preparation method comprises the following steps: adding a sulfur trioxide trimethylamine complex and pyridine into a methanol solution of sodium hydroxide, stirring until the sulfur trioxide trimethylamine complex and pyridine are dissolved, then adding hydroxytoluene sulfone, uniformly dispersing, heating the mixture, refluxing a gaseous evaporant by using a reflux device, cooling to room temperature after the reaction is completed, filtering out a reaction product, adjusting the pH value to be neutral, washing with water, and drying to obtain the product. The sulfate modified toluenesulfonyl is obtained. The SEI film formed by mixing sulfate modified toluenesulfonyl as a main body with 3-bromofuran through reduction has better stability, and can maintain the battery performance in a long-time high-pressure environment.

The present invention discloses a design and preparation method of an ultra-thin conductive layer of a micro-hemispherical resonant gyroscope, comprising: obtaining film thickness distribution data of the inner surface of a micro-hemispherical resonator; calculating the deformation energy of each region of the micro-hemispherical resonator, assuming that the region on the micro-hemispherical resonator where the deformation energy accounts for less than a first threshold as region A, and the rest as region B; obtaining the film thickness r corresponding to the inflection point of the resistivity based on a relationship curve between resistivity and film thickness; assuming that the film thickness of region A and region B is r A =a·r、r B =b·r, a and b are the maximum values ​​of the ratio of the film thickness of the plane area to that of area A and area B; based on r A 、r B After coating the inner surface of the micro-hemispherical resonator, the performance is tested and the r B The present invention is applied to the field of micro-electromechanical technology, and can reduce the film thickness of the area where the deformation energy of the micro-hemispherical resonator accounts for a larger proportion, while ensuring the conductivity of the metal film, thereby achieving the purpose of improving performance.

The utility model discloses a computer heat dissipation base which comprises a supporting frame, a supporting plate is arranged above the supporting frame, four heat conduction pieces are arranged on the supporting plate, a heat dissipation box is fixedly adhered to the bottom wall of the supporting plate, two through openings are symmetrically formed in the heat dissipation box, blowing cylinders are fixedly adhered to the interiors of the through openings, and the blowing cylinders are symmetrically arranged on the bottom wall of the supporting plate. And a cooling fan is fixedly installed in the blowing cylinder, a plurality of evenly-distributed cooling fins are fixedly bonded to the bottom walls of the four heat conduction pieces, and exhaust outlets are formed in the two side walls of the cooling box. In the using process of the computer radiator, heat generated when a computer is used can be conducted to the radiating fins through the heat conducting pieces, the radiating fan blows air to the inner cavity of the radiating box to take out the heat on the radiating fins, and therefore rapid radiating of the computer is achieved, direct blowing to the bottom of the computer is avoided, and the heat dissipation efficiency is improved. And the computer is prevented from being damaged due to the fact that tiny dust is blown into the computer and attached to internal elements due to direct blowing.

This invention discloses a coating solution for preparing high-temperature resistant and high-thermal-conductivity epoxy-based conductive films, its preparation method, and its application. By weight, it comprises the following raw material components: 70-85 parts liquid epoxy resin, 15-30 parts solid epoxy resin, 5-35 parts latent curing agent, 0.5-5 parts accelerator, 300-600 parts conductive filler, 15-30 parts thermoplastic resin, 0.5-2 parts coupling agent, and 30-60 parts solvent. The thermoplastic resin is a phenoxy resin with a special chemical structure and a molecular weight of 20,000-65,000 g / mol. This invention, by introducing a high-temperature resistant thermoplastic resin into the coating solution formulation, enables the prepared conductive film product to possess excellent comprehensive properties such as toughness, adhesion characteristics, and high-temperature stability.

The utility model discloses an ultraviolet radiation-proof photovoltaic cable, which comprises a plurality of wire core assemblies, the surfaces of the plurality of wire core assemblies are provided with a wrapping layer, a filling layer is arranged in a gap between the wrapping layer and the plurality of wire core assemblies, the surface of the wrapping layer is provided with an armor layer, the surface of the armor layer is provided with a second insulating layer, and the surface of the second insulating layer is provided with a first insulating layer. A plurality of annular grooves are formed in the surface of the second insulating layer at equal intervals, and mounting structures are arranged in a manner of being matched with the annular grooves. According to the utility model, the plurality of wire core assemblies, the filling layer, the wrapping layer, the armor layer and the second insulating layer are arranged, the plurality of wire core assemblies are all composed of the conductive wires and the first insulating layers, the conductive wires adopt the galvanized copper wires, the diameter of the conductive wires is reduced, the number of the conductive wires is increased, and the conductive wires are arranged in parallel; and annular grooves are formed in the surface of the second insulating layer at equal intervals, so that the bending resistance of the photovoltaic cable is higher, and the conductivity and the flexibility of the cable are ensured.