185results about How to "Improve electrical contact performance" patented technology

The invention provides a power-dissipation-free and energy-saving type start protector of a single phase AC motor and belongs to the technical field of refrigeration compressors. The power-dissipation-free and energy-saving type start protector comprises a shell, a shell cover, an overload protector, a power-dissipation-free starter and an external terminal mechanism. The shell is provided with an overload protector seat, a power-dissipation-free starter accommodation cavity, an external terminal mechanism cavity and a start controller accommodation cavity. The shell cover is provided with a first three-terminal jack and a second three-terminal jack. The overload protector is arranged in an overload protector accommodation cavity. The power-dissipation-free starter comprises a power-dissipation-free starter body and a start controller. The external terminal mechanism is matched with the external terminal mechanism cavity. The start protector is characterized in that the external terminal mechanism cavity comprises a first insertion cavity, a second insertion cavity and a third insertion cavity, the second insertion cavity is formed in the left side of the shell, and the bottom wall of the second insertion cavity is provided with a second shell insertion groove; the first insertion cavity and the third insertion cavity are formed in the right side of the shell, a first shell insertion groove is formed in the bottom wall of the first insertion cavity, and a third shell insertion groove is formed in the bottom wall of the third insertion cavity; the external terminal mechanism comprises a first insertion piece and a second insertion piece, the first insertion piece is matched with the second shell insertion groove in an inserted mode, and the second insertion piece is matched with the first shell insertion groove in an inserted mode.

The invention discloses an electrolyte solution for a high-capacity lithium-ion battery. The electrolyte solution includes non-aqueous solvent, lithium hexafluorophosphate, negative electrode film forming additive, positive electrode surface activity inhibiting additive and transition metal ion complexant; the negative electrode film forming additive includes organic ester negative electrode film forming additive of 1 to 10wt% of the total electrolyte solution and inorganic lithium salt negative electrode film forming additive of 0.5 to 2wt% of the total electrolyte solution; the positive electrode surface activity inhibiting additive includes fluorinated ether additive of 1 to 5wt% of the total electrolyte solution and nitrile additive of 0.1 to 5wt% of the total electrolyte solution; the transition metal ion complexant is of 0.1 to 1.0wt% of the total electrolyte solution. The electrolyte solution is adaptive to the high-capacity lithium-ion battery and is capable of optimizing the circulating performance and high-temperature storage performance of the lithium-ion battery. The invention further provides a preparation method of the electrolyte solution and the high-capacity lithium-ion battery adopting the electrolyte solution.

The invention discloses an energy-saving type power-consumption-free single-phase alternating current motor starting protector with structure improvement, and belongs to the technical field of refrigeration compressors. The energy-saving type power-consumption-free single-phase alternating current motor starting protector comprises a shell body, a shell cover, an overload protector, a power-consumption-free starter and an externally connected terminal mechanism, wherein an overload protector containing cavity, a power-consumption-free starter containing cavity, an externally connected terminal mechanism insertion cavity and a starting controller containing cavity are defined by the shell body; the shell cover is matched with the shell body; the overload protector is arranged in the overload protector containing cavity; the power-consumption-free starter comprises a power-consumption-free starter body and a starting controller; the externally connected terminal mechanism is matched with the externally connected terminal mechanism insertion cavity in an inserting mode. The energy-saving type power-consumption-free single-phase alternating current motor starting protector is characterized in that externally connected terminal mechanism insertion cavity comprises a first insertion sheet cavity, a second insertion sheet cavity, a third insertion sheet cavity and a fourth insertion sheet cavity. The externally connected terminal mechanism comprises a first insertion sheet, a second insertion sheet, a third insertion sheet, a fourth insertion sheet and a fifth insertion sheet. The first insertion sheet is matched with the first insertion sheet cavity in an inserting mode, the second insertion sheet is matched with the second insertion sheet cavity in an inserting mode, the third insertion sheet is matched with the third insertion sheet cavity in an inserting mode, the fifth insertion sheet is matched with the fourth insertion sheet cavity in an inserting mode, the fourth insertion sheet is in electrical connection with the overload protector, and the first insertion sheet and the third insertion sheet serve as transfer terminals to be connected with an externally connected power source and a capacitor.

The invention relates to a copper base electrical contact compound material, in particular to a weak current copper base electrical contact compound material used for low voltage electric switch, and a method to prepare the compound material. The compound material is composed of materials by the following proportions: 0.5-4 percent bismuth, 0.5-4 percent TiAl metal compound, 0.05-0.6 percent rare earth material, and the rest copper and other unavoidable impurities. The preparation method is: mixing powder in ball mill; cold pressing; sintering; secondary molding; and secondary sintering; the compound material produced with the invention has the advantages of strong anti-fusion welding performance, and good arc extinguishing performance and oxidation resistant performance. The electricity conductivity is similar to that of silver base electrical contact compound material, and wearing-resistant performance superior to that of the original boron carbide copper base and silver base electrical contact compound material. Therefore, the compound material is a cheap replacement for silver alloy electrical contact in low voltage switches.

The invention belongs to the lithium ion battery field, in particular to a preparing method of a composite electrode capable of being used as a negative electrode of a lithium ion battery, which has high specific capacity, high charging and discharging reversibility and excellent circularity. The composite electrode comprises an electrode active material and a current collector, wherein the electrode active material is a composite material which utilizes carbon with fine interface compatibility as a base, and utilizes silicon, tin or other compounds as active species, and utilizes nickel, copper or graphite and polymer pyrolysis carbon as fillers, the current collector includes current collecting materials such as foamed nickel, foamed copper or carbon cloth which have three-dimensional network structure, certain high temperature resistance property, sound conductivity and can enable electrode active substances to be uniformly distributed inside or on the surfaces, and the composite electrode is prepared by dispersing silicon (tin)/ nickel (copper, graphite) compounded in compounding process of the electrode active material through the high temperature solid phase reaction.

The invention provides a composite silver stannic oxide electric contact material, which comprises 5-15wt% of SnO2 and the balance of silver. The material also contains additive which comprises the oxide of one or two types of elements, such as copper, tungsten, bismuth, indium, antimony and tellurium, and the total weight of the elements accounts for 0.1-3% of the gross weight. Meanwhile, the invention also provides a preparation method for the composite silver stannic oxide electric contact material. The controllable and environmentally-friendly preparation method for the composite silver stannic oxide electric contact material, which has the advantages of relatively simple technology and relatively low production cost, is suitable for preparing various silver stannic oxide contact materials of stannic oxide powder of different grain diameters, and the stannic oxide powder and various additives can be enabled to be evenly distributed in a silver matrix.

The invention relates to a binding method for an ITO target material or other ceramic target materials. The binding method comprises the following steps: S1, metallizing the surface of a target blank;S2, metallizing the surface of a back plate; S3, processing a binding indium layer; S4, binding the target material; and S5, cooling. The method is capable of binding the target blank and the back plate of ITO by using indium. The prepared ITO target material or the other ceramic target materials have good cooling and electric contact performance, and a good heat-conducting property, wherein a welded rate thereof is greater than 98%, and higher than the prior art. In a practical application, the prepared ITO target material or the other ceramic target materials have not non-uniform sputteringand target material cracking problems in a sputtering process.

The invention discloses a preparation method of a graphene/stannic oxide quantum dot composite electrode material for a lithium ion battery. In the sample preparation process, that graphene-supported stannic oxide quantum dots are synthesized under relatively mild experiment conditions by utilizing a wet chemical method, and urea is adopted as a reducing agent to reduce graphite oxide, so that the preparation method has the advantages of simple and controllable reaction conditions and low production cost; by introducing graphene, not only can the conductivity of the composite material be improved but also volume change in the stannic oxide charge-discharge process can be effectively buffered; therefore the composite material shows good cycling stability.

The invention belongs to the field of lithium-ion battery anode materials, and provides a lithium-ion battery silicon-carbon composite anode material and a preparation method thereof. The lithium-ion battery silicon-carbon composite anode material comprises a core-shell structure and is characterized in that a core comprises nano silicon/graphene sheets and soft carbon, and the core is the nano silicon/graphene sheets and soft carbon composite particles which are obtained by performing heat treatment on a soft carbon precursor and the nano silicon/graphene sheets, the soft carbon is attached to the surfaces of the nano silicon/graphene sheets, and free spaces are formed among the nanometer silicon/graphene sheets; the shell is composed of a second carbon material and nano carbon which are coated on the surface of the core sequentially.

The invention discloses a multifunctional internally-installed tire pressure sensor. The sensor comprises a valve nozzle formed in the outer side of a tire and a sensor body arranged in the tire; a detection chip which is electrically connected with a PCB and used for detecting the pressure of the tire is arranged at the position, in the direction facing the groove bottom, of the PCB, and a gas groove for storing gas of the tire is embedded in the bottom end of the detection chip; an open hole communicated with the tire is formed in the bottom of a second containing groove, the open hole is connected with the gas groove through sealing silica gel, and then a sealed gas cavity is defined by the open hole, the gas groove and the sealing silica gel; the detection chip detects gas pressure in the sealed gas cavity to obtain gas pressure of the tire; a positive electrode elastic sheet is arranged on a battery positive electrode piece, and a negative electrode elastic sheet is arranged on a battery negative electrode piece; and after the battery positive electrode piece and the battery negative electrode piece are fixed to a button battery, the positive electrode elastic sheet and the negative electrode elastic sheet penetrate the second containing groove to be fixed to the PCB and are electrically connected with the PCB. The multifunctional internally-installed tire pressure sensor is accurate in tire pressure detection result, rapid and convenient to dismount and mount, and good in electric contact performance.

The gas insulated transmission line includes: a pair of conductors disposed in a length direction; a fixed-side socket and a movable-side socket respectively coupled to one ends of the conductors; and a conductive flexible member interposed between facing end surfaces of the fixed-side socket and the movable-side socket, both ends of the conductive flexible member being closely adhered to the end surfaces of the fixed-side socket and the movable-side socket to keep electric contact therebetween, and the conductive flexible member being expanded or shrunken in an axial direction according to thermal expansion/shrinkage of the pair of conductors. The gas insulated transmission line provides a wide axial contact area while allowing thermal expansion/shrinkage of conductors.

The invention discloses a method for preparing a superconductive nanometer device by a negative electron beam resist exposure process. The method mainly comprises the following steps of: spinning a hydrogen silsesquioxane (HSQ) resist on a superconductive thin film; pre-drying; designing an exposure graph; exposing by two steps; developing; fixing; and etching. By using the method, the superconductive nanometer device which is stable in performance and uniform in line width and has the minimum line width of 15 nm can be prepared. Residues do not exist in an electrode region after the etching step is performed by setting an exposure amount in different regions and changing the thickness of an exposure product in the corresponding region, so that electrical measurement is facilitated. HSQ has high anti-etching performance and is suitable to serve as an etching mask of a hard superconductive metal material, so that the etching selection ratio can be increased. An electrode and the device are obtained through one-time etching; no contact potential difference exists between the electrode and the device; and the success rate of the device is high. Furthermore, a plurality of independent micro electric bridges are exposed on the same thin film, so that the efficiency of integrating and measuring the electric bridges can be improved, and the material utilization rate is increased; and the superconductive nanometer device has great significance for research on nanometer structures made of rare materials.

The invention discloses a platinum based alloy and its preparing process, wherein the platinum based alloy comprises the constituents by wt% of Ir 5.0-25.0, Ru 1.0-10.0, 0.1-2.0% of La, Sm, or Y, and balancing Pt. The preparation process includes, disposing each element of Pt, Ir, Ru, La (Sm, Y) according to the alloy composition requirement, alloying in vacuum smelting furnace, fabricating into sheet material or shredded material through forging, thermal treatment, rolling or drawing.

The invention discloses a watertight connector with a skeleton-free structure. The watertight connector with the skeleton-free structure comprises a plug (1) and a receptacle (2). The receptacle (2) comprises an insulating main body A (3), a group of pins (5) and at least one positioning pin (6), wherein a connecting terminal (5) of each pin (5) is connected with a polyfluoride sheath core wire (12); and the pins (5), the positioning pin (6), the polyfluoride sheath core wires (12) and the insulating main body A (3) form an integrated structure. The plug (1) comprises an insulating main body B (15), a group of jacks (7) matched with the pins (5), and a positioning pin jack (14) matched with the positioning pin (6), wherein a connecting terminal of each jack (7) is connected with a watertight cable (16); and the jacks (7), the positioning pin jack (14), the watertight cables (16) and the insulating main body B (15) form an integrated structure. The watertight connector has the advantages of simple structure, high processibility, small volume, convenience for plugging and unplugging, high insulativity, contact reliability and long plugging and unplugging service life.

The invention adopts a vapor phase method. Red phosphorus is heated in a low-temperature closed space to form phosphorus steam, and is subjected to in-situ chemical reaction with commercial porous nickel foam, and then a flake NiXP/Ni composite material is formed on the surface of a nickel foam substrate. X-ray diffraction characterization proves characteristic peaks comprising simple substances Ni, NiP2 and Ni5P4. According to the method, the NiXP/Ni (X is smaller than 1.25 and greater than 0.5) composite material employing the nickel foam as the substrate is obtained. Scanning electron microscope characterization proves that a flake structure of which the mean thickness is 20nm vertically grows on the porous mesh nickel foam substrate. Through the structure, the electric contact performance is strengthened, vertical spaces of which the mean size is 10 microns are formed among the flake structures, a sodium ion diffusion channel is formed by the shape and form and the sodium ion diffusion path is shortened. An electrochemical performance test proves that the first discharge capacity is 0.72mAh/cm<2> and the capacity retention after 60 cycles is kept at 0.28mAh/cm<2>.

The invention discloses a silicon carbide consubstantial PIN (Personal Identification Number) microstructure material which comprises an N type silicon carbide substrate, an N-variable concentration buffer layer arranged on the N type silicon carbide substrate, an intrinsic layer arranged on the N-variable concentration buffer layer, and a P+ cap layer arranged on the intrinsic layer. The invention simultaneously discloses a preparation method of the silicon carbide consubstantial PIN microstructure material. The invention can prepare an extension SiC epitaxial material with the advantages ofbright surface and uniform resistivity, the background carrier concentration of the intrinsic epitaxial layer can be reduced to the 1015 order of magnitude, and the microstructure material provided by the invention is suitable for high-power electronic and electric devices of semiconductors.

The invention discloses a method for preparing an electromagnetic shielding material, which comprises the following steps: 1) preparing the following components in parts by weight: 70-80 parts by weight of silicon rubber; 20-30 parts by polytetrafluoroethylene; 2-3 parts by weight of nano-scale graphite powder; Curing agent ~ 2; heat stabilizer 1 ~ 2; 2) forming a composite rubber mixture uniformly infiltrated with nano-scale graphite particles in a molten state; 3) injecting the composite rubber mixture in step 2) into the mold cavity of the forming mold, and Completely wrap the wire mesh inside; 4) In a negative pressure environment, vibrate the forming mold through a vibrator to remove the internal air bubbles; 5) High pressure and low temperature, rapid cooling and solidification, to obtain a semi-finished electromagnetic shielding material; 6 ) heat and melt the semi-finished electromagnetic shielding material again, and cool and solidify naturally at high pressure and normal temperature to obtain the electromagnetic shielding material. The invention also discloses the electromagnetic shielding material prepared by the method, the corresponding electromagnetic shielding gasket, and the electromagnetic shielding button terminal using the electromagnetic shielding gasket.

The invention discloses a rolling contact rotary electrical connector. The rolling contact rotary electrical connector comprises a shell, a shaft, a shaft sleeve, an end cover, an inner conductive ring, an outer conductive ring, flexible rings, an insulating ring, a bearing and an output lead, wherein the inner conductive ring and the outer conductive ring are connected with leads for the transmission of signals and power; a proper number of flexible rings are arranged between the inner conductive ring and the outer conductive ring according to the need; and the flexible rings keep contact with the working faces of the inner conductive ring and the outer conductive ring by means of elastic deformation. The inner conductive ring is mounted on the shaft, the outer conductive ring is mountedon the shell, and a bearing is mounted between the shaft and the shell to achieve relative rotation and drive the flexible rings to rotate, thus realizing the continuous transmission of signals from the inner conductive ring to the outer conductive ring. By rolling the flexible rings relative to the inner conductive ring and the outer conductive ring, the transmission of signals and power is realized, so that the friction and wear during rotating operation can be reduced greatly, and the service life of the rolling contact rotary electrical connector can reach more than five times of that of the traditional rotary electrical connector at the same rotating speed.