7results 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.

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 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.