10results about How to "Improve electrical stability" patented technology

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.

This invention discloses a polypyrrole-coated polyurethane electrospun conductive fiber membrane and its preparation method, belonging to the technical field of conductive composite fiber material preparation. The polyurethane fiber membrane is prepared by electrospinning. The PU fiber membrane is immersed in an ethanol solution of 3-aminopropyltriethoxysilane to introduce active amino groups onto the fiber surface. The fiber membrane is then immersed in a mixed aqueous solution containing FeCl3 and p-toluenesulfonic acid, and a pyrrole aqueous solution is slowly added dropwise under ice bath conditions to allow polypyrrole to grow in situ on the PU fiber membrane, obtaining the PPy@PU conductive fiber membrane. This invention enhances the FeCl3 content by surface coupling APTES onto the PU fiber surface. 3+ The interface pre-adsorption effect is achieved by in-situ oxidation polymerization of FeCl3 / p-TSA system under ice bath conditions, which enables PPy to grow uniformly and stably on the fiber surface, effectively improving the interfacial bonding force between PPy coating and PU fiber, and exhibiting good electrical conductivity stability and comfortable breathability.

The application relates to the technical field of solid insulation ring network cabinets, in particular to a solid insulation ring network cabinet, which comprises a cabinet body, the inner part of the cabinet body is respectively provided with a phase unit module, an operating mechanism module and an insulation support module, the phase unit module, the operating mechanism module and the insulation support module are mutually independent modules, and the phase unit module, the operating mechanism module and the insulation support module are respectively independently formed through split type automatic pressure gel pouring; the phase unit module, the operating mechanism module and the insulation support module are respectively independently formed through split type automatic pressure gel pouring, so that the solid insulation ring network cabinet is compact in structure after being assembled and formed, space is saved, the cabinet body width can be reduced from the traditional 500 mm to about 350 mm, space is saved and the transformation cost is reduced, meanwhile, the situation that a whole pouring cabinet is scrapped due to local problems is avoided, and the operation and maintenance cost and the whole life cycle cost are greatly reduced.

The invention discloses a display panel and a display device, the display panel comprises a first transistor and a second transistor, a second active layer comprises an oxide semiconductor, and the carrier mobility of the second active layer is greater than that of the first active layer. The second active layer comprises a first oxide semiconductor layer and a second oxide semiconductor layer which are stacked. The first oxide semiconductor layer comprises indium, gallium and zinc, the second oxide semiconductor layer comprises indium, gallium, tin and zinc, the first indium ratio is smaller than the second indium ratio, and the first gallium ratio is larger than the second gallium ratio. The first indium ratio is set to be smaller than the second indium ratio and the first gallium ratio is set to be larger than the second gallium ratio in the second active layer, so that the requirement for high mobility of the second transistor is met, the electrical stability of the first oxide semiconductor layer is higher, surrounding hydrogen can be prevented from invading the second oxide semiconductor layer, and the mobility of the second transistor is improved. Therefore, the risk of negative bias of the threshold voltage of the second transistor is reduced.

The present invention relates to a polyurethane, a method for producing the polyurethane, a conductive paste composition, a conductive wiring, and a method for producing the conductive wiring. The present invention is a polyurethane characterized by containing a phenolic hydroxyl group represented by the following general formula (1A). The present invention provides a conductive paste composition for forming a stretchable conductive wiring having less change in conductivity upon stretching, and a polyurethane of the composition.[Chem. 1]

This application relates to the field of welding technology in electronic manufacturing, specifically to a vacuum diffusion welding method for aluminum heat spreaders. The method includes a pretreatment stage, a welding process implementation stage, and a post-treatment stage. The pretreatment stage includes sequentially sandblasting, ultrasonic cleaning, and plasma activation treatment of the aluminum surface, followed by preheating under vacuum or inert gas protection. The welding process implementation stage includes assembly and positioning using high-precision fixtures, followed by diffusion welding in a vacuum environment using a stepped pressure method. The post-treatment stage includes cryogenic treatment. This invention significantly improves the interfacial atomic diffusion efficiency and metallurgical bonding strength through a combination of sandblasting roughening and plasma activation surface pretreatment combined with stepped pressure vacuum diffusion welding. For aluminum-copper dissimilar metal connections, a transition layer and a barrier layer are introduced to suppress brittle intermetallic compounds. For flexible electronics manufacturing, gradient heating and local temperature difference control are used to achieve reliable low-temperature connections.

This application discloses a composite high-flowability, high-conductivity conductive masterbatch and its preparation method, relating to the technical field of conductive materials. The masterbatch uses a fiber-forming polymer as a matrix, compounded with conductive carbon black, graphene, silver nanosheets, carbon nanotubes, and modified MXene nanosheets, along with coupling agents, dispersants, antioxidants, and lubricants. The modified MXene nanosheets are modified with an amino-functionalized modifier and a polysaccharide mixture of sodium alginate and agar. Amino grafting improves interfacial compatibility, while polysaccharide coating inhibits filler agglomeration and oxidation, optimizing the dispersion of the conductive filler in the matrix. This masterbatch constructs a multi-level continuous conductive network, significantly improving melt flowability, conductive stability, and mechanical properties, effectively solving the problems of easy agglomeration, poor flowability, and insufficient spinnability of traditional conductive masterbatches.

The application belongs to the technical field of aerogel preparation, and particularly relates to high-strength polypyrrole reinforced nylon aerogel and a preparation method and application thereof. The preparation method comprises the following steps: (1) first, dispersing a hydroxypropyl-beta-cyclodextrin and polyethylene glycol aqueous solution onto an ice surface, adding pyrrole monomers, and forming a dispersion liquid after standing; (2) adding an acid solution containing an oxidizing agent to the dispersion liquid, and obtaining high-strength self-supporting polypyrrole nanometer arrays after reaction; (3) adding the high-strength self-supporting polypyrrole nanometer arrays and nylon into an acidic solvent; and (4) freeze-drying, thereby obtaining high-performance nylon aerogel for 3D printing. The nylon aerogel serves as an intermediate carrier, and improves the polypyrrole-polyurethane interfacial interaction. Moreover, the nylon itself has excellent strength and flexibility, can better adapt to the rheological behavior of the polyurethane matrix, and thus greatly improves the mechanical properties and antistatic capacity of the product.

The invention discloses a parking air conditioner battery positive electrode lead plaster with long low-voltage charging cycle life and a preparation method, the positive electrode lead plaster comprises the following components in parts by weight: 70-92 parts of lead powder, 0.06-0.15 part of antimony trioxide, 0.08-0.2 part of stannous mono-sulphate, 0.06-0.12 part of ultra-strong short fiber, 0.1-0.20 part of graphite, 0.02-0.12 part of single-wall carbon nano-tube, 6-10 parts of pure water and 5.8-9.8 parts of dilute sulphuric acid, the lead powder contains 72-76 wt% of PbO, the size of the ultra-strong short fiber is 2-5mm, the size of the pure water is 2-5mm, and the size of the pure water is 2-5mm. The density of the dilute sulfuric acid is 1.25-1.5 g / cm < 3 The preparation method comprises the steps of composite additive preparation, lead powder premixing, acid mixing and paste mixing, the acid spraying time is controlled to be 18-22 min, the maximum paste mixing temperature is 70-80 DEG C, and the paste discharging temperature is lower than 50 DEG C. A high-efficiency conductive network is constructed through synergistic modification of core components, sulfation and electrolyte layering are inhibited, the cycle life of the battery under the parking working condition exceeds 300 times and is prolonged by 50% or above compared with that of a traditional product, the formula process is adaptive to an existing production line, the yield is high, and the battery is suitable for parking air conditioners and other low-voltage charging scenes and has important practical value and popularization significance.

The battery according to the present invention comprises: an electrode assembly provided by winding a first electrode and a second electrode around a central axis of a winding central hole in a state in which a separator is interposed therebetween; the battery cell shell accommodates the electrode assembly and is provided with an opening in one side; and a collector plate electrically connected to each of the electrode assembly and the battery cell case and having a peripheral portion at an edge thereof, the peripheral portion having a rigidity enhancing portion configured to enhance the rigidity of the peripheral portion.