11results about How to "Good insulation properties" patented technology

The utility model discloses a multi-nozzle precision control electrostatic spinning machine, and relates to the technical field of electrostatic spinning machines. The spinning machine comprises a spinning machine shell, a moving mechanism and a wind-up roller are installed in an inner cavity of the spinning machine shell, the moving mechanism is provided with a moving plate, an advancing mechanism is installed on the moving plate, a push plate is installed on the advancing mechanism, a support is installed on the moving plate, a plurality of spray heads are installed on the support, and the spray heads are connected with the wind-up roller. A placing plate is mounted on the moving plate, a plurality of material conveying pieces are arranged on the placing plate, and a fixing mechanism is mounted at the top of the placing plate and located above the material conveying pieces. The insulating ceramic partition plates on the support are made of aluminum oxide ceramic materials and are distributed between every two nozzles at equal intervals, the adjacent nozzles are physically isolated, direct coupling of electric field lines between the adjacent nozzles can be blocked through the high insulation characteristic of insulating ceramics, and independent fusiform electric field distribution is formed by each nozzle.

The application discloses a kind of discrete series low distributed capacitance liquid cooling heat dissipation device and method, it belongs to electronic device heat dissipation technical field, heat dissipation device includes several heat dissipation units, the top of each heat dissipation unit is used to set power device, and two adjacent heat dissipation units are connected by cooling liquid pipeline;Each heat dissipation unit includes matrix and radiator, cooling liquid pipeline is through the inside of matrix, the top center of matrix is equipped with mounting hole, and mounting hole is equipped with radiator, and the lower half of radiator is inserted into the inside flow channel of cooling liquid pipeline, and the top of radiator is used to place power device.The application adopts discrete series heat dissipation unit structure, cooling liquid pipeline is through each unit matrix, and the lower half of radiator is inserted into the inside flow channel of pipeline, and each unit independently corresponds a power device.Solve the parasitic distributed capacitance problem caused by shared metal radiator, eliminate resonance loop, inhibit switching oscillation, reduce loss, ensure that heat dissipation is uniform and dynamic equalization, improve the stability and service life of high-voltage series module.

The invention discloses an environment-friendly flame-retardant high-voltage photovoltaic cable and a preparation method thereof, belongs to the technical field of cable processing, and aims to solve the technical problem that the flame retardance, insulating property, wear resistance and mechanical strength of an environment-friendly flame-retardant high-voltage photovoltaic cable in the prior art need to be further improved. The cable specifically comprises a cable core, an insulating layer and an outer sheath layer, wherein the outer sheath layer of the cable comprises the following components in parts by weight: 48-52 parts of polyurethane, 1-3 parts of adipic dihydrazide, 20-25 parts of a flame retardant, 12-15 parts of a reinforced compound and 4-6 parts of an auxiliary additive. Through the synergistic effect of the polyurethane, the flame retardant and the reinforcing compound, the flame retardant property, the insulating property, the wear resistance and the mechanical strength of the cable are improved.

The application discloses a composite negative electrode sheet, a preparation method thereof and a lithium battery. The composite negative electrode sheet comprises a current collector and an active material layer, a first insulating and heat-conducting coating layer and a second insulating and heat-insulating coating layer which are sequentially stacked on the current collector, wherein the first insulating and heat-conducting coating layer comprises an insulating and heat-conducting material, the second insulating and heat-insulating coating layer comprises an insulating and heat-insulating material, the particle size D50 of the insulating and heat-conducting material is D v1 , and the particle size D50 of the insulating and heat-insulating material is D v2 . D v1 <D v2 The composite negative electrode sheet can effectively improve the safety performance of the lithium battery.

This invention discloses an environmentally friendly water-based fire-fighting composite material for thermal runaway protection and its preparation method. The invention uses superabsorbent resin, epoxy resin, and a special fire-fighting liquid as main raw materials, which are mixed and then vibrated to form the composite material. The superabsorbent resin absorbs water to form a gel network, uniformly coating and fixing the special fire-fighting liquid to form a stable honeycomb composite structure. The epoxy resin provides mechanical support and a thermally conductive framework, jointly achieving integrated fire-fighting, heat dissipation, shock absorption, and thermal insulation functions. The material of this invention features flame retardancy, high-efficiency heat dissipation, shock absorption, and strong low-temperature adaptability. It can be filled between battery modules and PACK shells to quickly suppress fire and absorb impact during thermal runaway, while maintaining structural integrity and functional stability over a long period. The material preparation process is simple, environmentally friendly, and non-toxic, making it suitable for the safety protection of new energy battery systems.

The application provides a rolling brush motor and a ground brush assembly. The rolling brush motor comprises a stator, a rotor shell and a fixed shaft led out from the stator and the rotor shell; the stator is fixed on the fixed shaft; the rotor shell is rotatably sleeved on the stator and is configured to drive the rolling brush of the cleaning device to rotate; a wire channel is arranged in the first end of the fixed shaft to lead the lead wire of the stator out of the rotor shell; and the material of the fixed shaft is engineering plastic. The fixed shaft is made of engineering plastic to form the wire channel in the fixed shaft, realize internal wiring, enhance waterproof reliability, reduce the entry of water vapor into the rotor shell from the assembly position of the bearing and the fixed shaft, stably assemble the uniform outer surface of the fixed shaft and the inner ring of the bearing to reduce shaking, and avoid the need for more installation fixing structures and space for additional wiring.

The invention discloses a two-dimensional semiconductor transistor with a gate dielectric cooperatively inducing channel p-type conduction, and belongs to the technical field of semiconductor devices. The device mainly solves the technical problem that stable and high-performance p-type conduction of a two-dimensional n-type semiconductor material (such as InSe) is difficult to realize. According to the technical scheme, the method is characterized in that a two-dimensional antiferromagnetic insulating material CrOCl is adopted as a gate medium and a p-type induction layer at the same time, effective hole doping of a channel material is achieved through van der Waals interface charge transfer between the CrOCl and a two-dimensional n-type semiconductor channel layer (such as InSe), and a stable p-type conductive channel is formed through induction. The device structure comprises a substrate, a gate electrode, a CrOCl layer, a semiconductor channel layer and a source / drain electrode from bottom to top. A traditional doping technology is not needed, simple construction of the p-type transistor is achieved through material and structure innovation, and a core device scheme is provided for a complementary metal oxide semiconductor (CMOS) logic circuit based on a two-dimensional semiconductor.

The application provides an insulating waterproof sealing structure layer and a preparation method and a heating module. The insulating waterproof sealing structure layer comprises the following raw materials in mass fractions: polyurethane 100-500 parts, quartz sand 400-1000 parts, calcium salt 50-300 parts, pigment 1-10 parts, polyurethane diluent 10-100 parts, sodium dodecyl sulfate 1-10 parts, and mineral oil 1-10 parts. The insulating waterproof sealing structure layer has good curing performance, insulating properties and waterproof properties, can provide good protection for various electric heating equipment and facilities, and does not affect the normal operation of the electric heating equipment.

The utility model discloses a motor insulation bearing assembly which comprises a disc-shaped base, an outer ring fixed in the disc-shaped base, an inner ceramic ring installed at the central axis position in the outer ring and a retainer fixed at one end of the surface of the inner ceramic ring, and a plurality of balls in rolling contact with the inner wall of the outer ring are embedded in the retainer. And a polyimide insulating sleeve is coaxially sleeved in the inner ceramic ring. The outer ring, the balls, the retainer, the inner ceramic ring and the polyimide insulation sleeve are sequentially mounted in the disc-shaped base connected with the motor shell, the current insulation purpose is achieved, meanwhile, the inner ceramic ring and the polyimide insulation sleeve are sleeved with each other, the upper ends and the lower ends of the inner ceramic ring and the polyimide insulation sleeve are in bolted connection, and the purposes of quick disassembly and quick assembly are achieved.

This invention discloses a high-insulation binaphthalene polyimide dielectric film, its preparation method, and its applications, belonging to the field of high-performance insulating materials technology. Through molecular structure regulation, this invention introduces a large-volume, non-coplanar binaphthalene structure into the polyimide molecular chain. On one hand, the non-planar helical configuration between the two naphthalene rings suppresses the intra-chain conjugation effect, weakening the carrier transition capability along the main chain. On the other hand, the large-volume binaphthalene structural unit effectively disrupts the regular arrangement of the molecular chain, increasing the internal free volume and inter-chain spacing, thus increasing the length and tortuosity of the carrier migration path, increasing the energy barrier height that carriers must overcome during migration, and weakening the inter-chain carrier mobility. The synergistic effect of the above-mentioned intra-chain and inter-chain carrier migration suppression significantly improves the breakdown strength of polyimide and greatly extends its corona resistance lifetime.

This invention discloses a polynorbornene imide insulating material, its preparation method, and its applications, belonging to the technical field of electrical insulation materials and their preparation. This invention solves the problem of poor insulation performance in existing polynorbornene imide dielectric films. This invention obtains FPNI by fluorinating polynorbornene imide (PNI), a polymer dielectric film with a wide bandgap and a high glass transition temperature organic rigid backbone. Furthermore, by doping FPNI with the wide bandgap organic molecule 4,4-dihydroxydicyclohexane (OH), not only is hydrogen bonding crosslinking between hydroxyl and fluorine atoms achieved, but the wide bandgap OH also brings higher electronic transition energy levels, resulting in a crosslinked polymer film with excellent insulation performance and a breakdown field strength of 619.53 MV / m.