87results about How to "Eliminate contact resistance" patented technology

A solid oxide fuel cell (SOFC) repeat unit includes an oxide electrolyte, an anode, a metallic fuel flow field, a metallic interconnect, and a metallic air flow field. The multilayer laminate is made by casting tapes of the different functional layers, laminating the tapes together and sintering the laminate in a reducing atmosphere. Solid oxide fuel cell stacks are made by applying a cathode layer, bonding the unit into a gas manifold plate, and then stacking the cells together. This process leads to superior mechanical properties in the SOFC due to the toughness of the supporting metallic layers. It also reduces contact resistances in stacking the cells since there is only one physical contact plane for each repeat unit.

The invention provides a metal-electroplating enhanced transparent conductive film and a preparation method thereof. The preparation method comprises: a transparent conductive layer is prepared on the surface of a substrate; a metal layer is deposited on the transparent conductive layer by an electroplating method and post-processing is carried out to obtain a metal-electroplating enhanced transparent conductive film. The mass ratio of the metal of the metal layer to the material of the transparent conductive layer is 0.001-500: 1. The surface of the substrate is a planar, curved or irregular surface. According to the invention, with the electroplating technology, the contact resistance can be eliminated, the ohmic contact can be realized, and the light-transmitting property and conductive property of the transparent conductive film can be enhanced obviously. Moreover, the temperature-resistance performance of the film is excellent and the adhesive force is good; the process is simple; the cost is low; the repeatability and efficiency are high; and the transparent conductive film has the broad industrial application prospects.

The invention relates to a method of compositely manufacturing proton exchange membrane fuel cell bipolar plate and membrane electrode assembly in the technical field of fuel cell; the method comprises the steps of: first, using stamping process to process the double-layer stainless steel fiber net into the bipolar plate, second, using polyfluortetraethylene for executing hydrophobic treatment to the formed stainless steel fiber net bipolar plate, thereby forming hydrophobic reaction gas channel; third, coating a layer of carbon powder at surface of the bipolar plate after the hydrophobic treatment for leveling; fourth, applying the catalyst layer on the Nafion type proton exchange membrane to produce Pt/C catalyst layer; fifth, carrying out heat pressing treatment to the processed bipolar plate and the proton exchange membrane having catalyst layer to obtain the composite stainless steel fiber net bipolar plate and membrane electrode assembly. The component material of the invention has low producing cost and little ohmic loss and can be bent to satisfy the diverse design requirements of the stack structure.

The invention provides an OLED backplane structure and a method for manufacturing the OLED backplane. The OLED backplane structure is provided with a composite electrode (5). On one hand, the materialof the contact part (51) of the composite electrode (5) in contact with a semiconductor layer (111) of a thin film transistor (11) is conductive metal oxide. While the Fermi level pinning effect between a metal and a semiconductor is reduced, a large series resistance is not caused, and the contact resistance of the metal and the semiconductor can be greatly reduced. On the other hand, an anode and a drain electrode of the thin film transistor (11) are integrated to be a whole body, the contact resistance between the anode and the drain electrode of the thin film transistor (11) is eliminated, thus the on-resistance of an OLED display can be greatly reduced, and the power consumption is reduced.

The invention provides a test probe device comprising a needle bed main body, a test needle, a plastic spring bracket and a pressure sensor, wherein the needle bed main body comprises a fixed seat, a test needle fixer, a U-shaped pressure adjuster and a pressure sensor fixed part; the test needle comprises a knife-type test probe and a signal output line connected with the test probe; the signal output line is connected with the fixed seat at the back end of the main body; the test needle is fixed on the plastic spring bracket, and the plastic spring bracket is fixed at the front end of the needle bed main body; the pressure sensor comprises a pressure sensor main body, a pressure data conducting wire and a pressure data conducting wire connector; the pressure sensor main body is fixed on the upper surface of the needle bed main body via the pressure sensor fixed part; the pressure data conducting wire is connected with the pressure sensor main body and the pressure data conducting wire connector; and light reflected bars are arranged below the induction device of the pressure sensor and at the upper surface of the plastic spring bracket.

The invention discloses a four-terminal electrical impedance tomography method based on a two-terminal impedance measurement mode, and belongs to the technical field of the electrical nondestructive testing. The method comprises the following steps of: establishing a finite element model of an electrical impedance tomography sensor, and calculating a four-terminal sensitivity matrix of adjacent excitation, relative excitation or diagonal excitation modes; measuring two-terminal impedance for an electrode of a relay dual-T-type multi-channel switch module gate sensor; converting the two-terminal impedance value into the four-terminal impedance value in a corresponding excitation mode; and resolving the electric conductivity difference distribution in a sensitive field, and reconstructing images. The four-terminal electrical impedance tomography method based on the two-terminal impedance measurement mode provided by the invention is suitable for a non-intrusive mode electrical impedance tomography technology, and in particular is suitable for the situation that the four-terminal impedance measurement method does not meet application requirements or does not have a four-terminal impedance measurement instrument. The four-terminal electrical impedance tomography method based on the two-terminal impedance measurement mode provided by the invention can effectively improve the contrast ratio and resolution ratio of the constructed images, and can accelerate the imaging speed.

The invention discloses a method for manufacturing a prefabricated branch cable, which is implemented by after connecting a main cable and the branch cable, adopting a band-shaped material lapping with identical insulation and jacket with the original cable, then wrapping with a high temperature resistant polyfluortetraethylene band, a glass fiber band and a soft copper band, adopting coal gas flame or other methods to heat the lapping, raising the temperature until that the in insulation and jacket material inside the lapping layer is fused, cooling and processing. The insulation and jacket can be any material, and the only requirement is that the structure and material are identical with those of the cable. The insulation and jacket can be of the same material or different materials, andcan be finished in one step or multiple steps according to concrete conditions. The invention needs not to adopt an expensive large injection molding set or dies in the prior art, thus reducing production cost and improving safety and reliability.

The invention relates to the field of manufacturing of vanadium cells, particularly relates to an integrated electrode for a vanadium cell, and a preparation method thereof, and solves the problems of difficulty in high-current charging and discharging, low energy efficiency, large flow liquid resistance and the like in the prior art. High-molecular resin powder and an electrode are taken as raw materials, volatile resolvent is taken as dispersion medium, resin and the electrode are fully mixed under the action of stirring, and then suction filtration is performed until no resolvent can percolate; and the electrode mixed with the resin powder is placed in a drying oven for drying, then placed in a die for hot-forming, is put into resolvent after being taken out to have resin on the surface to be separated, and is dried in the drying oven so as to form the integrated electrode. According to the working requirements of the vanadium cell, the high-molecular resin and the electrode are prepared into the integrated electrode; and the resistivity can reach 0.01 to 0.1 Omega. cm, so that the physical resistance of the cell is lowered, the high-current charge-discharge capability and the energy efficiency of the vanadium cell can be improved, and the reliability of the vanadium cell can also be improved.

The invention relates to a preparation method for a three-dimensional porous composite material. The method comprises the following steps that an inert metal salt solution and an active metal salt solution are provided; a substrate is provided, the surface of the substrate is electroplated with the inert metal salt solution, and a coating film M is formed; a carbon nanotube structure is arranged on the surface of the coating film M; the surface of the carbon nanotube structure is electroplated with the active metal salt solution, a coating film N is formed, the substrate is peeled, and a composite structure is obtained; the composite structure is subjected to high temperature annealing, and an alloy is formed by active metal and inert metal in the composite structure, and a preform is obtained; and the preform is etched into a porous structure, and the three-dimensional porous composite material is obtained.

The invention discloses a cathode preparation process for reducing niobium oxide capacitor equivalent series resistance. The process mainly comprises steps of anode core block and dielectric film processing, cathode semiconductor processing, cathode transition layer processing and cathode leading-out layer processing. Impregnation of the anode core block forming the dielectric layer, dehydration and thermal decomposition of a low-concentration and high-concentration manganese nitrate solutions are carried out, a transition layer is added between the cathode semiconductor and the cathode leading-out layer, interlayer contact resistance is eliminated, and thus equivalent series resistance of the capacitor is reduced by more than 20%. As the dehydration step is adopted before the thermal decomposition step in the manganese nitrate solution, the filling rate of manganese dioxide inside the anode core block is improved, alternative impregnation and thermal decomposition in the low-concentration and high-concentration manganese nitrate solutions can be cancelled, the operation is simpler, the efficiency is higher, and the process is suitable for industrialized mass production.

The invention belongs to the field of solar cells, and particularly relates to a solar cell module and a manufacturing method thereof. The solar cell module comprises multiple serially connected sub-cells. Each sub-cell comprises a base electrode, an electronic transmission layer, an optical active layer, a hole transmission layer and a top electrode successively from the bottom to the top. The polarities of any two adjacent sub-cells are opposite to each other on the serial connection circuit of the solar cell module. The base electrodes of any two adjacent sub-cells on the serial connectioncircuit are directly connected with each other or directly connected with the top electrodes. According to the invention, middle ineffective area used for connecting the sub-cells can be effectively reduced; space filling factors of the module are improved; meanwhile, contact resistance of upper and lower electrodes is eliminated; and performance of the cell is further improved. According to the invention, it is potentially possible to achieve highly-efficient large-area solar cells.

A tank closure comprises a tank cap and an electrically conductive tank neck. The tank cap has, for handling thereof, a grip portion made of electrically conductive material that is in electrical contact with at least one resilient contact projection that is also electrically conductive and, with the tank cap in the screwed-on state, rests against the tank neck. The contact projection or projections is or are shaped onto or molded into the grip portion.

The present invention provides a manufacture method of a thin film transistor backplane, comprising steps of: providing a substrate (20) with a gate (21), an insulation layer (22) and a semiconducting layer (23); sequentially forming a second metal layer, a reflecting electrode layer and a conductive oxide layer on the substrate (20); implementing one photolithographic process to the second metal layer, the reflecting electrode layer and the conductive oxide layer to pattern the second metal layer, the reflecting electrode layer and the conductive oxide layer for respectively forming a source/a drain (253), a reflecting electrode (252) and a pixel electrode (251), and the source/the drain (253) are connected to the semiconducting layer (23; forming a protective layer on the source/the drain (253), the reflecting electrode (252) and the pixel electrode (251; forming a flat and pixel defining layer (27) on the protective layer (26); forming a photospacer (28) on the flat and pixel defining layer (27).

The invention discloses a volume resistivity test method of an ethylene vinyl acetate copolymer (EVA) adhesive film used for photovoltaic module packaging, the volume resistivity test method includes the following steps: (1) preparing a sample: respectively arranging auxiliary electrodes on the upper surface and the lower surface of the EVA adhesive film to obtain the sample; (2) testing resistance: testing the sample through a high-insulation volume resistivity tester and reading a testing resistance; (3) calculating volume resistivity: calculating the volume resistivity of the EVA adhesive film in the sample according to a formula 1; or calculating the relative volume resistivity of the EVA adhesive film in the sample according to a formula 2; the formula 1 is that Rho [1]=RS/L=R Rho [density] S<2>/m, and the formula 2 is that Rho [2]=R/m. The testing method has the advantages of being small in measuring error, high in measuring accuracy and easy to operate.

A disconnect switch (30, 30SA) is placed in circuit between a battery bank (12) and a distribution point (30B) for the entire electrical system load except the engine cranking motor (24). This allows the circuit between the battery bank and a cranking motor solenoid (22) that operates the cranking motor to be switch-free. A switch-free circuit allows a continuous cable to connect the battery bank to the cranking motor solenoid, significantly reducing the electrical resistance between the battery bank and the cranking motor solenoid.

The invention discloses a non-contact type concrete resistivity testing instrument. The non-contact type concrete resistivity testing instrument is characterized by comprising an inner working core barrel and an outer working core barrel, wherein the inner working core barrel and the outer working core barrel are assembled into a double-shell barrel body structure by adopting bolts; the double-shell barrel body structure is provided with a ring-shaped iron core and a current testing instrument which respectively surrounds opening ends of an upper barrel and a lower barrel of the inner working core barrel and the outer working core barrel, the inner wall of the inner working core barrel and the outer wall of the outer working core barrel; the inner wall of the outer working core barrel is provided with an induction coil which is connected with a voltage testing instrument outside the outer working core barrel by a wire; and the iron core on the outer wall of the outer working core barrel is wound with a primary coil which is connected with a power supply outside the outer working core barrel by a wire. The non-contact type concrete resistivity testing instrument disclosed by the invention is based on the electromagnetic mutual inductance principle, can be used for testing the resistivity when being buried and cast in concrete, and is suitable for monitoring the change of the resistivity of the concrete for a long time and in real time.

A wicking structure comprising a biporous wick formed with a semiconductor (e.g., silicon), wherein the biporous wick comprises first pores and second pores formed by the semiconductor and the first pores are larger than the second pores.

The invention relates to a test fixture for powder resistivity, and the test frame is provided with a guide rail device, and a slide caliper is arranged on the surface of the guide rail device and is connected with the base of the guide rail device; a double-screw bolt and a screw mandrel are arranged in a guide rod, and the double-screw bolt and the screw mandrel are connected with a big gear wheel through a cam, so that a big gear wheel and a small gear wheel are bonded to achieve the gear transmission under the effect of an external-force handle to drive a pressure mechanism to pressurize; the pressure mechanism is fixed on a moving frame and is in stud connection with the moving frame; a powder standard container is located above the base and below a pressure sensor and is used for current and voltage drop method, particularly four-terminal measurement method (both current electrode and voltage electrode are contacted with a sample at the same time), so as to eliminate contact resistance errors generated by contact between the electrodes and the powder and eliminate errors caused by the connection system. The fixture is compact in structure, novel in design and convenient in installation and can measure the resistivity of the power sample truly and accurately.