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126 results about "Electric breakdown" patented technology
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High-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film and preparation method thereof
The invention discloses a high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film and a preparation method thereof. The high-temperature-resistant, high-voltage-resistant and anti-breakdown capacitor base film is prepared from the following raw materials in parts by weight: 100 parts of polypropylene; 17 to 36 parts of polyvinylidene fluoride; 3-12 parts of enhanced and improved talcum powder; 1-6.5 parts of modified barium titanate; 1-6 parts of a cross-linking agent; 2-10 parts of a compatilizer; and 0.05-2 parts of an initiator. The capacitor base film is high in mechanical strength, and has excellent high temperature resistance, thermo-oxidative aging resistance, high voltage resistance and anti-breakdown performance; the enhanced and improved talcum powder is constructed by taking expanded layer modified talc as a carrier and titanium dioxide-carbon dot composite particles as a loading component and grafting and coating the organic matter, so that the defects of the talcum powder can be overcome, and the improvement effect of the talcum powder on heat resistance, high-voltage resistance and breakdown resistance can be fully exerted; meanwhile, the system can be endowed with excellent thermo-oxidative aging resistance.
Owner:扬州博恒新能源材料科技有限公司
Temperature-controllable electric heating compound and preparation method thereof
PendingCN119403000AControl heating temperatureImprove temperature uniformityOhmic-resistance electrodesCoatingsTemperature controlElectric breakdown
The invention relates to the technical field of electric heating materials, in particular to a temperature-controllable electric heating compound and a preparation method thereof. The invention provides a temperature-controllable electric heating compound which comprises a composite heating layer, a packaging insulating layer and a copper foil electrode clamped between the composite heating layer and the packaging insulating layer, a matrix insulating layer is arranged below the composite heating layer, and a series of regularly arranged circular holes are formed in the composite heating layer; and the packaging insulating layer packages the copper foil electrode and the composite heating layer on the substrate insulating layer. The composite heating layer is provided with a series of regularly arranged circular holes, so that the temperature distribution is more uniform, and the accuracy of temperature control can be improved. The supporting performance, the fatigue resistance and the bending resistance are achieved, and the risk of electric breakdown is reduced. Therefore, the method has a wide market application prospect. Meanwhile, the invention further provides a preparation method of the temperature-controllable electric heating compound, and the preparation method is simple in step, convenient to operate and suitable for large-scale industrial production.
Owner:HUANENG HEZHANG WIND POWER CO LTD +2
Calculation method for vacuum circuit breaker closing electric breakdown multi-physics coupling simulation
PendingCN120893259ADesign optimisation/simulationSpecial data processing applicationsElectrical field strengthElectric breakdown
The invention discloses a vacuum circuit breaker closing electric breakdown multi-physical field coupling simulation calculation method, which comprises the following steps of: performing simulation analysis on an electric field on the surface of a single micro-bulge by constructing a geometric model of a micro-bulge on the surface of a contact of a vacuum circuit breaker to obtain the electric field intensity of the micro-bulge surface and the current density of field emission in the closing process of the vacuum circuit breaker; the critical opening range of field emission is determined; obtaining metal vapor pressure distribution characteristics of the contact material at different moments by taking a critical opening range of field emission as an initial condition; and according to the metal vapor pressure distribution characteristics, obtaining the electron density in the breakdown process of the vacuum circuit breaker so as to determine the evolution rule of the microcosmic plasma parameters and obtain the closing breakdown characteristics. According to the method, the electric breakdown characteristics under different contact surface structures can be accurately analyzed, and an initial plasma condition can be provided for pre-breakdown equilibrium arc modeling, so that the modeling precision is greatly improved.
Owner:DALIAN UNIV OF TECH +2
Preparation method of high-performance electric-breakdown-resistant capacitor base film
The invention discloses a preparation method of a high-performance electric-breakdown-resistant capacitor base film, which comprises the following steps: S1, preparing modified polypropylene master batch: mixing polypropylene, a cycloolefin copolymer, a barium titanate-carbon nanotube modified composite filler and an antioxidant, and carrying out melt blending, extrusion and granulation to obtain the modified polypropylene master batch; s2, carrying out melt extrusion on the modified polypropylene master batch, cooling and casting; s3, carrying out two-way stretching and heat setting on the obtained casting piece to obtain a polypropylene film; and S4, performing plasma treatment on the surface of the polypropylene film to obtain the high-performance electric-breakdown-resistant capacitor base film. The high-performance electric-breakdown-resistant capacitor base film prepared by the method has excellent electric breakdown resistance, mechanical strength, flame retardance and heat resistance, has a long-acting flame retardant effect, is excellent in comprehensive performance and has a wide market application prospect.
Owner:扬州博恒新能源材料科技有限公司
Method for improving thermal conductivity and electric breakdown strength of polyimide film
The invention provides a method for improving heat conductivity and electric breakdown strength of a polyimide film, and relates to the field of advanced materials.The method comprises the steps that heat conduction filler is pretreated through an aminated siloxane coupling agent, so that amino active sites are formed on the surface, and then a polymer nano brush of a special structure is constructed on the surface of the filler; by utilizing the multi-layer effects of good compatibility, entanglement, hydrogen bonds, pi-pi accumulation and the like of the nano brush and a polyimide matrix, uniform dispersion and strong interface construction of the nano filler are realized, and the thermal conductivity of the polyimide film is greatly improved under the condition of low additive amount; meanwhile, based on the anti-breakdown characteristic of the inorganic nanofiller, the electric breakdown strength of the polyimide film is improved.
Owner:ANHUI FANGSHENG ELECTRONIC TECH CO LTD
Block metal ore grade online analysis method based on high-voltage pulse discharge breakdown spectroscopy
PendingCN120741433AAnalysis by electrical excitationAnalysis by thermal excitationVoltage pulseElectric breakdown
The invention provides a bulk metal ore grade online analysis method based on high-voltage pulse discharge breakdown spectroscopy, which comprises the following steps: (a) placing bulk metal ore particles in a high-voltage discharge electrode system filled with a liquid insulating medium, and applying 30-250kV voltage through a high-voltage electric pulse generator to carry out pulse discharge, carrying out electric breakdown on the ore particles and generating plasmas; (b) synchronously acquiring a plasma characteristic spectrum signal and a voltage waveform signal and a current waveform signal of pulse discharge in the electric breakdown process; (c) preprocessing the characteristic spectral signal, determining element types according to the wavelength of a characteristic spectral line, and extracting the intensity of the characteristic spectral line; and (d) inputting the characteristic spectral line intensity, the pulse discharge waveform parameter, the discharge condition and the ore particle property into a pre-established quantitative analysis model, and outputting the metal element grade of the ore particles.
Owner:FUZHOU UNIV
Preparation method of heat-resistant, flame-retardant and electric breakdown-resistant modified polypropylene capacitor base film
The invention discloses a preparation method of a heat-resistant, flame-retardant and electric-breakdown-resistant modified polypropylene capacitor base film. The preparation method comprises the following steps: S1, preparing composite intercalation organic montmorillonite and microcapsule type reinforced particles; s2, preparing a modified polypropylene master batch: mixing the polypropylene master batch, the composite intercalated organic montmorillonite, the microcapsule type reinforced particles, an initiator and an auxiliary agent, heating and stirring to obtain the modified polypropylene master batch; s3, adding polyvinylidene fluoride into the premix, heating and stirring, and carrying out melt extrusion on the obtained mixture; s3, cooling the casting piece; s4, biaxial stretching, heat setting, cooling and corona treatment are carried out, and the heat-resistant, flame-retardant and electric-breakdown-resistant modified polypropylene capacitor base film is obtained. The polypropylene is filled and modified through the composite intercalation organic montmorillonite and the microcapsule type reinforced particles, and the polyvinylidene fluoride is compounded and added, so that the heat resistance, flame retardance, electric breakdown resistance and mechanical strength of the polypropylene capacitor base film can be comprehensively improved.
Owner:扬州博恒新能源材料科技有限公司
Water and electric shock resistant PVC insulating electrical tape and its preparation method
ActiveCN120924175BNon-macromolecular adhesive additivesFilm/foil adhesive primer layersAdhesive cementPolymer science
The application discloses a kind of water-resistant and electric breakdown-resistant PVC insulating electrician adhesive tape and preparation method thereof, and relates to the technical field of insulating electrician adhesive tape.The water-resistant and electric breakdown-resistant PVC insulating electrician adhesive tape includes PVC film layer and adhesive layer arranged on one surface thereof;The adhesive layer includes primer layer directly contacting the PVC film layer and pressure-sensitive adhesive layer arranged on the other surface of the primer layer.The PVC film layer includes the following raw material components: 50 parts of PVC resin, 10-15 parts of insulating filler, 15-20 parts of toughening agent, 2-4 parts of heat stabilizer, 0.25-0.75 parts of lubricant and 0.5-1.5 parts of antioxidant by weight fraction;The primer layer includes the following raw material components: 50 parts of acrylate monomer, 6-8 parts of unsaturated acid, 2-3 parts of photoinitiator and 0.5-1 part of antioxidant by weight fraction.
Owner:DONGGUAN YIZHOU ADHESIVE PROD CO LTD
Battery cell module
ActiveCN222463371UGuaranteed safe transmissionavoid arcingCurrent conducting connectionsElectrical batteryElectric breakdown
According to the battery cell module provided by the invention, when electric energy needs to be released or used, the electric energy is transmitted to the total positive output piece and the total negative output piece through the tabs of the battery cells. And the total positive output piece and the total negative output piece are isolated from the battery cell group through the insulating piece, so that safe transmission of electric energy is ensured, and electric breakdown and electric arcs are avoided. And the total positive output piece and the total negative output piece concentrate the electric energy and transmit the electric energy to a circuit or equipment outside the battery module. The insulating parts are introduced between the battery cell group and the total positive output part and between the battery cell group and the total negative output part, so that electric breakdown and electric arc are effectively avoided, and the safety of the whole battery module is greatly enhanced. Battery damage caused by electric breakdown and electric arc is reduced, and the service life of the battery is prolonged.
Owner:SHENZHEN FUXIN IND TECH CO LTD
10KV indoor emergency access equipment
ActiveCN223843304UBus-bar/wiring layoutsSecuring/insulating coupling contact membersElectric breakdownStructural engineering
Owner:ZHEJIANG SIJI TECH SERVICE CO LTD
Cylindrical battery cell, battery device and electric device
PCT designated stageWO2026081225A1Electrolyte accumulators manufactureElectrical batteryElectric breakdown
The present application belongs to the technical field of batteries. Provided are a cylindrical battery cell, a battery device and an electric device. The cylindrical battery cell comprises a casing, an electrode terminal, an electrode assembly, a sealing member and a first insulating member. The electrode terminal is arranged on a wall portion of the casing. The electrode assembly comprises a main body portion and a first tab, wherein the first tab is arranged at one end of the main body portion in a protruding manner and is electrically connected to the electrode terminal. The sealing member comprises a first sealing portion located between the wall portion and a first limiting portion of the electrode terminal, and the first sealing portion extends beyond the first limiting portion in a direction away from a central axis of the cylindrical battery cell. The first insulating member comprises a first insulating portion arranged between the wall portion and the first tab, wherein the first insulating portion is formed with a through hole, and the first sealing portion is arranged in the through hole and forms a first gap with a hole wall surface of the through hole. A clearance portion is provided on a first surface of the first tab facing the wall portion, and a projection of the wall portion corresponding to an exposed area of the first gap is located in the clearance portion, so as to reduce the risk of electrical breakdown between the first tab and the wall portion.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Preparation method of modified polypropylene capacitor base film resistant to heat, flame and electric breakdown
This invention discloses a method for preparing a heat-resistant, flame-retardant, and electrically breakdown-resistant modified polypropylene capacitor base film, comprising the following steps: S1, preparing composite intercalated organic montmorillonite and microcapsule-type reinforcing particles; S2, preparing modified polypropylene masterbatch: mixing polypropylene masterbatch, composite intercalated organic montmorillonite, microcapsule-type reinforcing particles, initiator, and additives, heating and stirring to obtain modified polypropylene masterbatch; S3, adding polyvinylidene fluoride to the premix, heating and stirring, and melting and extruding the resulting mixture; S4, cooling and casting; S5, biaxial stretching, heat setting, cooling, and corona treatment to obtain a heat-resistant, flame-retardant, and electrically breakdown-resistant modified polypropylene capacitor base film. This invention, by filling and modifying polypropylene with composite intercalated organic montmorillonite and microcapsule-type reinforcing particles, and by compounding with polyvinylidene fluoride, comprehensively improves the heat resistance, flame retardancy, electrical breakdown resistance, and mechanical strength of the polypropylene capacitor base film.
Owner:扬州博恒新能源材料科技有限公司
Cylindrical battery cell, battery apparatus, and electrical apparatus
The present application belongs to the technical field of batteries, and provides a cylindrical battery cell, a battery apparatus, and an electrical apparatus. The cylindrical battery cell comprises a housing, an electrode terminal, an electrode assembly, a sealing member, a first insulating member, and a second insulating member. The electrode terminal is disposed on a wall portion of the housing. The electrode assembly comprises a main body portion and a first tab, the first tab being provided at one end of the main body portion and being electrically connected to the electrode terminal. The sealing member comprises a first sealing portion located between the wall portion and a first limiting portion of the electrode terminal, and the first sealing portion extends beyond the first limiting portion in a direction away from the central axis of the cylindrical battery cell. The first insulating member comprises a first insulating portion provided between the wall portion and the first tab, the first insulating portion is provided with a through hole, and the first sealing portion is located within the through hole and forms a first gap with a hole wall surface of the through hole. The second insulating member is located between the wall portion and the first tab, and the projection of the second insulating member in the thickness direction of the wall portion covers at least part of the first gap, so as to reduce the risk of electrical breakdown between the first tab and the wall portion.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Electric energy metering sensor fixing device for image recognition
The invention relates to an electric energy metering sensor fixing device for image recognition, and belongs to the technical field of electric energy metering. The electric energy metering sensor fixing device for image recognition comprises a mounting base, the top of the mounting base is fixedly connected with uniformly distributed threaded mounting parts, a mounting cavity is formed in the side end of the mounting base, and a safety monitoring mechanism is mounted in the mounting cavity; real-time state sensing and early warning are realized through a detection assembly in the safety monitoring mechanism, and a wireless main control chip cooperates with an image sensor and an inertial measurement unit to perform multi-angle image acquisition and vibration attitude monitoring on a current transformer body and a connection part. And the edge side intelligent analysis can identify the abnormities such as physical damage, electric breakdown traces, installation looseness and the like, timely triggers multi-level alarm, effectively avoids metering failure and troubleshooting lag, and meets the high reliability requirement of an intelligent power grid.
Owner:MARKETING SERVICE CENT OF STATE GRID LIAONING ELECTRIC POWER CO LTD +2
Cylindrical battery monomer, battery device and power utilization device
ActiveCN223487165USmall-sized cells cases/jacketsElectric connector introductionElectrical batteryElectric breakdown
The utility model provides a cylindrical battery monomer, a battery device and a power utilization device, and belongs to the technical field of batteries. The cylindrical battery cell includes a housing, an electrode terminal, an electrode assembly, a seal, and a first insulator. The electrode terminal is provided on a wall portion of the case. The electrode assembly comprises a main body part and a first tab; the first tab is convexly arranged at one end of the main body part and is electrically connected with the electrode terminal; the sealing piece comprises a first sealing part positioned between the wall part and the first limiting part of the electrode terminal; the first sealing part exceeds the first limiting part in the direction deviating from the central axis of the cylindrical battery monomer. The first insulating part comprises a first insulating part arranged between the wall part and the first tab, the first insulating part is provided with a through hole, the first sealing part is arranged in the through hole, and a first gap is formed between the first sealing part and the hole wall surface of the through hole. The first surface, facing the wall part, of the first tab is provided with an avoiding part, and the projection, corresponding to the exposed area of the first gap, of the wall part is located in the avoiding part, so that the risk of electric breakdown of the first tab and the wall part is reduced.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Preparation method of voltage breakdown-resistant anti-corrosion functional filler
The invention discloses a preparation method of a voltage-breakdown-resistant anticorrosive functional filler, and belongs to the field of preparation of coating fillers. The boron nitride nanosheet is subjected to surface amination modification, then zinc molybdate grows in situ, finally, ester compound hydrolytic condensation is utilized for surface treatment, and the composite filler with multiple functions of physical shielding, efficient insulation and active corrosion inhibition is successfully constructed. According to the method, not only can the dispersity and interface bonding force of the filler in the resin be effectively improved and the defects of the coating be reduced, but also the insulation barrier characteristic of boron nitride and the electrochemical anti-corrosion effect of zinc molybdate can be synergistically exerted, so that the long-term corrosion resistance and high-voltage electric breakdown resistance of the coating in a severe environment can be remarkably enhanced.
Owner:ZJU HANGZHOU GLOBAL SCI & TECH INNOVATION CENT
A high-performance polypropylene electrical film resistant to electrical breakdown and a preparation method thereof
The application relates to the technical field of polypropylene electrical film, in particular to a high-performance polypropylene electrical film with electric breakdown resistance and a preparation method thereof. The application provides a preparation method of the high-performance polypropylene electrical film, wherein polypropylene powder, styrene, a crosslinking aid and a compatilizer are mixed, melt-extruded and granulated, and then subjected to heat pressing, cold pressing, bidirectional stretching, cooling and shaping, edge cutting and corona treatment to obtain the polypropylene electrical film; the crosslinking aid is prepared from maleic anhydride, 2,4,6-triaminotoluene and allyl isocyanate; and the compatilizer is obtained by reacting maleic anhydride and polypropylene. The polypropylene electrical film prepared by the application has good performance and combustion performance, high mechanical strength and strong electric breakdown resistance at high temperatures.
Owner:DONGGUAN JUZHENGYUAN TECH CO LTD +1
Filter assembly, production method and filter thereof
PendingCN119317062Aeasy to understandContact member assembly/disassemblyImpedence networksElectric breakdownStructural engineering
The invention provides a filter assembly, a production method and a filter thereof, and relates to the technical field of filters, the filter assembly comprises a shell, a copper bar assembly and an anchoring part, the copper bar assembly comprises a first copper bar and a second copper bar, the first copper bar and the second copper bar are arranged in parallel, and the anchoring part comprises an anchoring body and a fixing body. The anchoring body is arranged between the first copper bar and the second copper bar and has a preset thickness; thus, the distance between the first copper bar and the second copper bar is anchored to the preset distance through the anchoring body with the preset thickness, so that the short circuit phenomenon caused by electric breakdown is avoided on the basis of improving the filtering performance, the distance between the first copper bar and the second copper bar is limited through the thickness of the anchoring body, the precision of the preset distance is improved, and the filtering performance is improved. The assembling precision of the filter assembly is improved, so that the short circuit phenomenon caused by electric breakdown is avoided on the basis of improving the filtering performance, and the assembling precision of the filter assembly is improved.
Owner:NINGBO YONGJIN AUTO PARTS CO LTD
Preparation method and application of electric breakdown-resistant corona-resistant polyimide film
The invention belongs to the technical field of preparation of electric insulating materials, and discloses a preparation method and application of an electric breakdown-resistant corona-resistant polyimide film. According to the invention, an in-situ polymerization method is adopted, and a diamine monomer containing a pyrimidine structure and a dianhydride monomer containing a nitrogen heterocyclic ring structure are respectively introduced into a polyimide molecular chain according to a certain proportion, so that the electric breakdown-resistant corona-resistant polyimide film with excellent insulating property is prepared. The direct-current breakdown field strength of the electric-breakdown-resistant corona-resistant polyimide film at room temperature is 431.33 kV / mm, the alternating-current breakdown field strength at room temperature can reach 308.54 kV / mm, and the corona-resistant service life at high frequency can reach 1305 s. The electric-breakdown-resistant corona-resistant polyimide film provided by the invention has the characteristics of breakdown resistance, corona resistance, good solution processability and the like, the preparation process is simple, the cost is relatively low, and the electric-breakdown-resistant corona-resistant polyimide film can be popularized and implemented.
Owner:DALIAN UNIV OF TECH
Light-emitting apparatus
PCT designated stage expiredWO2025002343A1Semiconductor/solid-state device detailsSolid-state devicesElectric breakdownLight emitting device
Disclosed in the present application is a light-emitting apparatus. The light-emitting apparatus comprises a substrate, which comprises a light-emitting area and a non-light-emitting area provided on one side of the light-emitting area, wherein the light-emitting area comprises a first electrode and a light-emitting layer which are sequentially arranged in a stacked manner on one side of the substrate, and the first electrode is arranged on the side of the light-emitting layer that is close to the substrate; a lapping conductive block and an electrode lead are provided in the non-light-emitting area of the substrate, an insulating layer is arranged on the side of the lapping conductive block and electrode lead that is away from the substrate, and the insulating layer covers part of the electrode lead and lapping conductive block; a dummy lead or an electric breakdown weak area are further provided in the non-light-emitting area of the substrate, the dummy lead is arranged adjacent to the lapping conductive block, and the dummy lead surrounds or partially surrounds the lapping conductive block; and the electric breakdown weak area comprises a conductive structure arranged on a surface of the substrate, the conductive structure and the first electrode are arranged on the same side of the substrate, and at least part of the light-emitting layer covers the conductive structure of the electric breakdown weak area.
Owner:GUAN YEOLIGHT TECH CO LTD
Physical modified polypropylene capacitor film material and preparation method and application thereof
The invention belongs to the technical field of thin film capacitors, and particularly relates to a physically modified polypropylene capacitor film material and a preparation method and application thereof. According to the physically modified polypropylene capacitor film material provided by the invention, the p-aminobenzoic acid polar filler and the maleic anhydride grafted polypropylene are simultaneously introduced, and the maleic anhydride grafted polypropylene is used as a bridge to promote the p-aminobenzoic acid polar filler to be effectively dispersed in the polypropylene capacitor film material, so that moisture is sufficiently adsorbed and removed; in addition, the p-aminobenzoic acid polar filler can also improve the dielectric property of the polypropylene capacitor film material, so that the polypropylene capacitor film material is more resistant to electric breakdown, and the service life of the film capacitor is prolonged. Therefore, the high-performance polypropylene capacitor film material can be obtained after physical modification of the p-aminobenzoic acid polar filler and the maleic anhydride grafted polypropylene, and the technical problem of low performance of the polypropylene capacitor film material in the prior art is solved.
Owner:ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD
Polycation modified meta-aramid insulation paper and preparation method thereof
The invention discloses polycation modified meta-aramid insulating paper and a preparation method thereof, and relates to the technical field of insulating materials. Meta-aramid chopped fibers are modified through polydimethyldiallylammonium chloride, then acrylamide is added for cross-linking enhancement, then the modified meta-aramid chopped fibers and meta-aramid fibrids are mixed and molded, and the polycation modified meta-aramid insulating paper is obtained. The polycation modified meta-aramid insulation paper is obtained. According to the invention, through a polycation modification technology, the interface bonding force between the meta-aramid chopped fiber and the fibrid is obviously enhanced. The modified insulation paper is excellent in mechanical performance, the tensile strength is greatly improved, the pore defects are reduced, and the compactness is enhanced, so that the strict requirements of the high-voltage insulation paper are met. Besides, the breakdown field strength of the modified insulation paper is remarkably improved, the deep trapped charge trapping capacity is enhanced, energy accumulation in the electric breakdown process is effectively inhibited, and higher reliability is shown in a complex electric field environment.
Owner:NORTH CHINA ELECTRIC POWER UNIV
Water-resistant and electric-breakdown-resistant PVC (polyvinyl chloride) insulating electrical adhesive tape and preparation method thereof
ActiveCN120924175ANon-macromolecular adhesive additivesFilm/foil adhesive primer layersAdhesive cementPolymer science
The invention discloses a water-resistant and electric-breakdown-resistant PVC (polyvinyl chloride) insulating electrical adhesive tape and a preparation method thereof, and relates to the technical field of insulating electrical adhesive tapes. The water-resistant and electric-breakdown-resistant PVC insulating electrical adhesive tape comprises a PVC film layer and an adhesive layer arranged on one surface of the PVC film layer, the adhesive layer comprises a bottom coating which is in direct contact with the PVC film layer and a pressure-sensitive adhesive layer which is arranged on the other surface of the bottom coating. Wherein the PVC film layer is prepared from the following raw material components in parts by weight: 50 parts of PVC resin, 10 to 15 parts of insulating filler, 15 to 20 parts of a toughening agent, 2 to 4 parts of a heat stabilizer, 0.25 to 0.75 part of a lubricating agent and 0.5 to 1.5 parts of an antioxidant; the bottom coating is prepared from the following raw material components in parts by weight: 50 parts of acrylate monomer, 6 to 8 parts of unsaturated acid, 2 to 3 parts of photoinitiator and 0.5 to 1 part of antioxidant.
Owner:DONGGUAN YIZHOU ADHESIVE PROD CO LTD
An abnormality searching device, method and equipment for a laid mineral insulated cable
ActiveCN116678356BTesting dielectric strengthWeather/light/corrosion resistanceMining engineeringElectric power system
The application discloses a device, method and equipment for checking abnormalities of a laid mineral insulated cable, and belongs to the technical field of power facilities. The device comprises: a laying track acquisition module, which is used to acquire a track line of the laid mineral insulated cable; a position of interest determination module, which is used to determine a position of interest according to the track line; and a flaw detection module, which is used to perform nondestructive flaw detection on the position of interest based on a nondestructive flaw detection means to determine whether the position of interest has an abnormality. According to the technical scheme, the position of the mineral insulated cable where damage defects are prone to occur can be checked for abnormalities through the laying track of the mineral insulated cable, maintenance personnel can be helped to timely repair the abnormal position, the insulation of the mineral insulated cable is prevented from being too low and electric breakdown from occurring, the safe operation of a power system is maintained, the service life is prolonged, and the maintenance cost of the mineral insulated cable is reduced.
Owner:GUANGZHOU PANYU CABLE WORKS
Rapid detection device for mobile distribution transformer
PendingCN121364370ATesting dielectric strengthCleaning using toolsDistribution transformerElectric breakdown
The invention discloses a rapid detection device for a mobile distribution transformer, and relates to the technical field of transformer detection. Comprising an electric breakdown test piece, an oil immersion control piece is installed on the electric breakdown test piece, and the oil immersion control piece is used for controlling the detection oil level; the electric breakdown test piece is provided with two electrifying electrode column pieces; the two energized pole members are used for testing the breakdown-resistant performance of oil of the transformer; the electric breakdown test piece is provided with a cleaning piece; the bottom of the electric breakdown test piece is provided with a cleaning control piece; the electrified electrode column piece can be matched with an oil immersion control piece, the height of the liquid level of oil is controlled, and it is ensured that the liquid level of transformer oil in the oil cup can meet the anti-breakdown detection requirement; the problems that a detachable oil cup of an existing movable distribution transformer is not convenient to limit the depth of a test oil level, and a pole is not convenient to clean automatically after oil is added are solved.
Owner:JIANGSU SUGONG ELECTRIC POWER TECHNOLOGY CO LTD
Composite insulating coating, preparation method of composite insulating coating, battery cell and application of battery cell
PendingCN119651011Aimprove featuresImprove toughnessBattery isolationElectrical batteryPhysical chemistry
The invention relates to the technical field of batteries, in particular to a composite insulating coating, a preparation method thereof, a battery cell and application of the battery cell. The composite insulating coating comprises a coating layer and a bonding layer which are arranged in a laminated mode, the coating layer is arranged on the surface of the application matrix in an attached mode and comprises organic components with electronegative functional groups and electropositive metal ions, and a dynamic cross-linked network structure is formed through complexation; the bonding layer is arranged on the surface of the coating layer and comprises an organic matter containing a polar functional group; at least on the interface of the coating layer and the bonding layer, the polar functional group in the organic matter and the electronegative functional group in the organic component form chemical bonding. The composite insulating coating can collaboratively seal electrolyte, has high mechanical stability, and can block long-period corrosion; meanwhile, the material has high insulativity, high toughness and an interface self-repairing function, can improve the hidden danger of microcracks caused by uneven stress of a matrix when being applied to a battery cell, reduces the risk of abnormal high-voltage electric breakdown of the matrix, and improves the long-term use reliability of the battery cell.
Owner:HUAWEI TECH CO LTD
Insulated cable material and application thereof in medium-voltage armored cable
The invention discloses an insulated cable material composition and application thereof in a medium-voltage armored cable. The composition takes 100 parts of polyethylene as a matrix, and is compounded with a styrene-maleic anhydride copolymer, a nano filler, 4, 4 '-dihydroxybenzophenone bis (methyl) acrylate, a cross-linking agent, an antioxidant and a lubricant. An anhydride group of the styrene-maleic anhydride copolymer reacts with a filler hydroxyl group to form a stable interface layer, so that space charge accumulation is effectively inhibited. A bis (methyl) acrylate group of the voltage stabilizer is synchronously subjected to chain extension-crosslinking in polyethylene to construct a high-strength three-dimensional network. The tensile strength of the obtained insulating material is larger than or equal to 28 MPa, the elongation at break is larger than or equal to 400%, the breakdown voltage is larger than or equal to 33 kV, the electric breakdown strength is larger than or equal to 400 kV / mm, the volume resistivity is larger than or equal to 5.2 * 10 < 14 > omega.m, and the insulating material is suitable for a medium-voltage armored cable insulating layer.
Owner:GUANGZHOU PANYU CABLE WORKS
Partial discharge detection method and device based on Rydberg atomic electric field sensor
The invention discloses a partial discharge detection method and device based on a Rydberg atomic electric field sensor, belongs to the technical field of partial discharge detection, and solves the problem that the sensor is easily damaged by electrical breakdown in a strong electric field environment in an existing partial discharge detection technology. A ground state cesium atom is excited to a Rydberg state, based on a free space coupling configuration mode, a to-be-measured radio frequency signal is directly propagated into an atomic gas chamber through a free space to be coupled with the Rydberg atom, an atomic energy level is displaced, the transmissivity of an electromagnetically-induced transparent spectrum is changed, electric field information is encoded into an optical signal, and the optical signal is transmitted to the ground state cesium atom. And then the photoelectric detector is used for converting the modulated optical signal into an electric signal, the electric signal is input into the oscilloscope for time domain waveform analysis, and based on an electrical-optical-electric signal conversion mechanism, the common electric breakdown risk in the traditional ultrahigh frequency detection technology is effectively avoided.
Owner:STATE GRID ANHUI ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
Lamp lighting device, fluorescence detector and chromatograph
A lamp lighting device is used to light a discharge lamp provided as a light source in a fluorescence detector. The discharge lamp has a configuration in which an anode and a cathode are arranged to be opposite to each other in a discharge container. The lamp lighting device includes a lamp driver, a lamp-voltage detector and a deterioration determiner. The lamp driver drives the discharge lamp. The lamp-voltage detector detects a lamp voltage in a monitoring period until a discharge state reaches a predetermined stable state after a discharge lamp in an unlit state is lit due to electrical breakdown. The deterioration determiner determines a deterioration state of the discharge lamp based on a detected lamp voltage.
Owner:SHIMADZU CORP
Cylindrical battery monomer, battery device and power utilization device
ActiveCN223712874USmall-sized cells cases/jacketsCell sealing materialsElectrical batteryElectric breakdown
The utility model provides a cylindrical battery monomer, a battery device and a power utilization device, and belongs to the technical field of batteries. A cylindrical battery cell includes a housing, an electrode terminal, an electrode assembly, a seal, a first insulator, and a second insulator. The electrode terminal is provided on a wall portion of the case. The electrode assembly comprises a main body part and a first tab; the first tab is arranged at one end of the main body part and is electrically connected with the electrode terminal; the sealing piece comprises a first sealing part positioned between the wall part and the first limiting part of the electrode terminal; the first sealing part exceeds the first limiting part in the direction deviating from the central axis of the cylindrical battery monomer. The first insulating part comprises a first insulating part arranged between the wall part and the first tab, the first insulating part is provided with a through hole, the first sealing part is located in the through hole, and a first gap is formed between the first sealing part and the hole wall surface of the through hole. The second insulating part is located between the wall part and the first tab, and the projection of the second insulating part in the thickness direction of the wall part covers at least part of the first gap, so that the risk of electric breakdown of the first tab and the wall part is reduced.
Owner:CONTEMPORARY AMPEREX TECHNOLOGY CO LTD