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238results about How to "Effective export" patented technology

Heat-conducting and wave-absorbing rubber material and preparation method thereof

The invention discloses a heat-conducting and wave-absorbing rubber material and a preparation method thereof. The heat-conducting and wave-absorbing rubber material is prepared from the following substances in parts by weight: 100 parts of a rubber matrix, 50-600 parts of heat-conducting powder, 50-400 parts of wave-absorbing powder, 0-2 parts of a release agent and 0.5-2 parts of a cross-linking agent. The heat-conducting and wave-absorbing rubber material has the properties of high temperature resistance, low temperature resistance, high voltage resistance, ozone aging resistance, radiation resistance, weather resistance, physiologically inert property, high permeability and solvent resistance, and especially has outstanding high temperature resistance, so that the possibility is provided for preparation of the heat-conducting and wave-absorbing material; the heat-conducting and wave-absorbing rubber material can be directly applied between a heat dissipation room and a metal housing, and heat energy can be effectively exported; and meanwhile, the heat-conducting and wave-absorbing rubber material has electromagnetic shielding and electromagnetic noise wave absorbing properties, so that a good solving scheme is provided for electronic communication products in heat conduction and electromagnetic shielding.
Owner:DALIAN DONGSHIN MICROWAVE TECH

Wavelength conversion apparatus and light emitting device

The invention brings forward a wavelength conversion apparatus for absorbing exciting light and emitting excited light. The wavelength conversion apparatus comprises a wavelength conversion layer and a heat-conduction substrate. To be specific, the wavelength conversion layer includes wavelength conversion particles and first heat-conduction particles, wherein the wavelength conversion particles and the first heat-conduction particles are mixed uniformly. The heat conductivity coefficient of the first heat-conduction particle is higher than 10W/m.K; and the size D2 of the first heat-conduction particle is less than or equal to 0.5 times of the size D1 of the wavelength conversion particle and is larger than or equal to 0.05 times of the D1. The wavelength conversion layer is tightly attached to the surface of the heat-conduction substrate. According to the invention, gaps among the wavelength conversion particles are filled with the first heat-conduction particles with the specific particle sizes, thereby effectively improving the thermal conductivity of the wavelength conversion layer. Therefore, heat emitted by the wavelength conversion particles can be effectively conducted to the surface of the wavelength conversion layer and then is dissipated through the heat-conduction substrate, so that the temperature of the wavelength conversion layer is effectively reduced.
Owner:吴震

Method for identifying transformer sympathetic inrush current based on intelligent substation territory information

Disclosed is a method for identifying transformer sympathetic inrush current based on intelligent substation territory information. The method includes the following steps: (1) judging whether a transformer is in a no-load shutdown state, (2) judging whether the phenomenon of no-load transformer switching-in exists, (3) acquiring line current of the switching-in side of the transformer which is switched in without load, acquiring line current of primary and secondary sides of other operating transformers, and calculating differential current of the primary and secondary sides of the operating transformers, (4) continuously calculating the secondary harmonic component of the operating transformers and carrying out timing from the moment of no-load switching-in till the secondary harmonic component is larger than m% and fundamental waves exceed by n% of rated current, (5) comparing the secondary harmonic phase of the switched-in transformer and the secondary harmonic phase of operating transformers, and (6) increasing the constant value of differential protection starting current of the operating transformers to k1 times of an original starting value and carrying out timing, and setting the constant value to be the original starting value and returning the process to the step (1) when one of three conditions is met. According to the method for identifying the transformer sympathetic inrush current based on the intelligent substation territory information, during the sympathetic inrush current, protection can still be effectively carried out when internal fault of the transformers occurs; after the sympathetic inrush current, differential protection action characteristics can return to original action states quickly.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1

High thermal conductivity polyimide film and preparation method thereof

The invention relates to a high thermal conductivity polyimide film and a preparation method thereof and belongs to the technical field of polyimide films. According to the high thermal conductivity polyimide film, the problems that an efficient heat conduction channel is difficulty constructed by an existing doping method at low filling volume of thermal conductive filler and mechanical properties and the thermal conductivity of the polyimide film cannot be simultaneously obtained are solved. The film comprises a polyimide resin A, polyimide resin B and the thermal conductive filler; the thermal conductive filler is dispersed in A phase; a solution interaction parameter difference of polyamic acid resin A and polyamic acid resin B is 2.5 to 5.0; the heat conduction channel of the polyimide film is continuous and is perpendicular to the plane of the film. The preparation method comprises the following steps: preparing a thermal conductive filler solution doped with the polyamic acid resin A and a thermal conductive filler solution doped with the polyamic acid resin B; mixing the two solutions; coating a substrate with the mixed solution; heating in the procedures; carrying out thermal imidization and stripping to obtain the high thermal conductivity polyimide film. The high thermal conductivity polyimide film and the preparation method thereof can be used for insulated heat dissipation of electronic components.
Owner:INST OF CHEM CHINESE ACAD OF SCI +1

Power battery heat management system

The invention relates to a power battery heat management system, and belongs to the technical field of power batteries. The power battery heat management system comprises a battery box, a temperatureadjustment device, a controller, a power supply switch and a plurality of semiconductor chilling plates. The temperature adjustment device is connected with the battery box, the semiconductor chillingplates are arranged on the temperature adjustment device and connected with a power supply end of the battery box through the power supply switch, the controller is connected with the power supply switch and used for controlling the power supply switch, so that the semiconductor chilling plates refrigerate, a plurality of phase change components and a plurality of battery components are arrangedin the battery box, and a temperature sensor connected with the controller is arranged in each phase change component. The temperature adjustment device comprises a hollow plate and a plurality of heat pipes, the hollow plate is filled with cooling liquid under a vacuum state, one end of each heat pipe is communicated with the hollow plate, and the other end of each heat pipe is closed and inlaidinto the battery box. The power battery heat management system has the advantages of simple structure, high cooling efficiency, easiness in control, light weight, low cost, excellent performance and the like.
Owner:XIAN UNIV OF SCI & TECH

Method for preparing anti-reflection layer and anti-reflection surface, photoelectric conversion device used by same

The invention relates to a method for preparing an anti-reflection layer. The method comprises the following steps of: forming a metallic film on the passivation layer; heat-treating the metallic film to enable the metallic film to self-assemble into metallic nanometer particles; removing partial region of the passivation layer by using the metallic nanometer particles as a shield to form a sub-wavelength anti-reflection structure, wherein the section area of the sub-wavelength anti-reflection structure increases along the thickness direction of the passivation layer; and removing the metallic nanometer particles. Besides, the invention also provides the prepared sub-wavelength anti-reflection structure and a reflection ratio thereof. Since the sub-wavelength anti-reflection structure provided by the invention has a good anti-reflection effect, the photoelectric conversion efficiency of the photoelectric conversion device can be improved. In addition, since the sub-wavelength anti-reflection structure is made on the passivation layer, the possibility of semi-conductor layer damage caused by reactive ions etching can be reduced; and then the photoelectric conversion efficiency of the photoelectric conversion device is improved.
Owner:SPRING FOUND OF NCTU

Semi-conductive polyolefin shielding material for high-voltage direct-current cable

The invention provides a semi-conductive polyolefin shielding material for a high-voltage direct-current cable. The semi-conductive polyolefin shielding material comprises the following components in parts by mass: 100 parts of LDPE (low-density polyethylene), 1-2 parts of CPE (chlorinated polyethylene), 0.5-1.5 parts of BaTiO3, 8-15 parts of conductive potassium titanate whisker, 0.2-0.6 parts of stearic acid, 1-2.5 parts of cross-linking agent and 0.1-0.5 part of antioxidant. The semi-conductive polyolefin shielding material prepared from the components has the characteristic of ultra-smooth surface, and is good in physical performance and excellent in comprehensive performance. The current can be effectively conducted, a good effect of homogenizing an electric field is achieved, and the problem of partial discharge or insulation breakdown caused by serious electric field concentration probably brought by the surface defect of a semi-conductive shielding layer is solved. By attracting an ionized charge and an injected charge into a deep trap, the charges are prevented from being accumulated in a partial area, so that space charge accumulation in a cable insulation material is suppressed, and the electric conductivity of the cable insulation material is reduced.
Owner:WUXI JIANGNAN CABLE

High-color-rendering high-power LED (light emitting diode) encapsulation structure and manufacture method of high-color-rendering high-power LED encapsulation structure

The invention relates to a high-color-rendering high-power LED (light emitting diode) encapsulation structure and a manufacture method of the high-color-rendering high-power LED encapsulation structure. The high-color-rendering high-power LED encapsulation structure comprises a high-heat-conduction base plate, a high-heat-conduction material block, a high-power LED chip and an encapsulation assembly, wherein a blind hole is arranged in the high-heat-conduction base plate, the high-heat-conduction material block is arranged in the blind hole and is glued into a whole with the high-heat-conduction base plate through high-heat-conduction bonding agents. The high-color-rendering high-power LED encapsulation structure and the manufacture method have the advantages that the structure that the high-heat-conduction base plate and the high-heat-conduction material block which is arranged in the blind hole of the high-heat-conduction base plate and is tightly matched with the high-heat-conduction base jointly form a high-power LED chip heat radiation base is adopted, the whole heat conduction and heat radiation performance of the heat radiation base is excellent, and heat generated by the high-power LED chip can be fast conducted out of the work region and is radiated through the heat radiation base, so the temperature can be effectively lowered, the stability and the reliability of the high-power LED chip are greatly enhanced, the high-power LED chip can continuously work for a long time at high current, and the service life is long.
Owner:SOUTH CHINA NORMAL UNIVERSITY

U-shaped pipe LED lamp

The invention discloses a U-shaped pipe LED lamp which comprises a lamp cap and a lamp body, wherein the lamp body comprises a multi-surface columnar radiating body surrounded by a plurality of heat dissipation single bodies and side surface lamp panels with LED lamp beads; a side surface light-transmittable shade is mounted on the side surface of each heat dissipation single body; a top surface lamp panel with LED lamp beads is mounted at the top of the heat dissipation single body; a top light-transmittable shade is mounted on the top surface lamp panel; a mounting cover is arranged between the radiating body and the lamp cap; a power module is placed on the upper end surface of the mounting cover; electrode spring plates connected with the power module are arrayed on the lower end surface of the mounting cover; each electrode spring plate comprises two side edges; the middle parts of the two side edges are bent relatively to form compressive surfaces; the arranging positions of the all side surface lamp panels are corresponding to the arranging positions of all the electrode spring plates; all the side surface lamp panels extend to the lower part of the mounting cover and extend into the compressive surfaces formed by all the electrode spring plates. The U-shaped pipe LED lamp has the advantages that the assembly and manufacture are simple, the radiating effect is good and the conductivity is high.
Owner:SHENZHEN TAXINJIE TECH

Flexible package lithium carbon fluoride primary battery

The invention discloses a flexible package lithium carbon fluoride primary battery, which is composed of a plurality of cylindrical pole groups, a non-aqueous electrolytic solution, a glue-containingelectrode lug and a soft shell, wherein the plurality of cylindrical pole groups are connected in parallel, each cylindrical pole group is of a multi-electrode lug or foil-electrode lug structure andcan be used for quickly guiding flow and conducting heat, positive and negative electrode sheets and a diaphragm are tight and wound so as to achieve tight contact between positive and negative electrodes and the diaphragm in the whole discharge process, the F/C atomic ratio in carbon fluoride is in gradient distribution in material particles, and the F/C atomic ratio of the outermost layer is close to 0, so that the problem that a conventional lithium carbon fluoride battery cannot discharge at high power is solved. According to the invention, the square lithium carbon fluoride battery adoptsthe soft package light shell, has the characteristics of high specific energy and high safety, does not deform and obviously expand in the whole discharge process, and does not need to adopt a high-strength shell and a clamp for limitation in the use process, so that the difficulty of combined application is greatly reduced.
Owner:TIANJIN JUYUAN NEW ENERGY TECH CO LTD

Industrial wastewater quality detection device and use method thereof

The invention discloses an industrial wastewater quality detection device and a use method thereof, and belongs to the technical field of wastewater detection. Waste water in a waste water storage pool is guided into a sampling adsorption cylinder for adsorption treatment through cyclic and repeated extraction of the sampling cylinder; a heavy metal adsorbent filled in the sampling adsorption cylinder is used for adsorbing heavy metals in the wastewater; after the adsorption work is more complete, the heavy metal adsorbent is introduced into a desorption cavity below the sampling adsorption cylinder for desorption treatment; the grinding mechanism is matched to effectively crush the heavy metal adsorbent into adsorbent particles; a proper amount of acid solution or dissolving solution is used to wash and desorb the adsorbent particles; finally, an acid pickling desorption solution or a dissolving desorption solution is acquired and guided into a detection cylinder so that technicians can detect and treat heavy metal ions in the wastewater conveniently; and meanwhile, multiple sets of contrast detection are set, a data analysis range is enlarged, and a wastewater quality detection effect is effectively improved.
Owner:成都永晟昌清洁服务有限公司
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