37results about How to "Avoid potential difference" patented technology

A valve gear in which corrosion due to a potential difference does not occur and which can reduce the corrosion occurrence even when loads due to microvibrations are given. The valve gear includes a valve stem and a valve bush that slidably supports the valve stem. The valve stem is formed from a forged part made of a Ni-based superalloy and the valve bush is formed from a cast part made of a Ni-based superalloy. The preferable surface roughness of a sliding surface of the valve stem in contact with the valve bush and the preferable surface roughness of a sliding surface of the valve bush in contact with the valve stem is 100 μM or less in units of Rz.

The invention relates to an apparatus for production of an electromagnetically shielded connection between a plug arrangement (which has at least one plug) of a first unit and a socket arrangement, which has at least one corresponding socket, of a second unit. The at least one plug and the at least one socket form a plug connection when connected to one another. The plug connection is surrounded by a shielding device which provides good electromagnetic shielding for it and is formed by the at least one plug and the at least one socket independently.

The invention discloses a battery component, a battery protection chip and an electronic product, wherein the battery protection chip includes a power supply pin, a ground pin, an inductance access pin, a current detection pin, a discharge control pin and a charge control pin , the chip also includes a voltage control circuit, a discharge control circuit and a charge control circuit. One end of the inductor is connected to the input end of the voltage control circuit, and the other end is electrically connected to the positive terminal of the battery. The discharge control pin and charge control pin of the battery protection chip They are respectively used to control the first NMOS tube electrically connected to the negative terminal of the battery, and the second NMOS tube electrically connected to the negative terminal of the external power supply. The voltage control circuit generates a stable control voltage, so that the conduction state of the two NMOS tubes is not affected by the battery voltage. The impact of the drop, and effectively avoid the potential difference between the inside and outside of the battery due to the disconnection of the negative terminal of the battery.

The invention discloses an electroplating production line for the inner surface of a crystallizer, which comprises a washing section, an electroplating section, a hoisting device and an electrolyte circulation supply system. The electroplating section is provided with a crystallizer fixed base, a tubular crystallizer and an anode titanium basket. The fixed base of the crystallizer is provided with an electrolyte liquid inlet pipe, a sealing gasket and an anode lead-out device. The anode titanium basket is arranged on the base, installed vertically and provided with two upper and lower electrode lead-out ends. The crystallizer is vertically arranged on the gasket on the base, and is sheathed on the periphery of the anode titanium basket. The upper side of the crystallizer is provided with a sealing hanging basket and a sealing gasket, the sealing hanging basket is provided with a liquid outlet pipe, the sealing hanging basket is provided with a mechanical pressing device, and the sealing hanging basket is compressed and sealed with the upper end of the crystallizer through the sealing gasket. The electroplating cathode is electrically connected to the crystallizer by pressing. The hoisting device is provided with a crane and a workpiece fixture. The washing section includes a washing liquid washing tank, an acid washing tank, a clean water washing tank, and a pure water washing tank.

The invention provides an industrial frequency transformer impact current suppression circuit. The industrial frequency transformer impact current suppression circuit comprises an energy taking unit arranged on a fire wire of a transformer, a rectification unit electrically connected with the output end of the energy taking unit, a constant voltage unit electrically connected with the rectification unit and a current suppression unit electrically connected with the output end of the constant voltage unit, and the current suppression unit is arranged on the fire wire of the transformer and electrically connected with a fuse F1 of the transformer. Most input voltages can be loaded on a current limiting resistor in the power-on process, all the voltages loaded on the current limiting resistor are loaded at the two input ends of the transformer after the power-on process, therefore, large impact currents cannot be generated by the transformer at the starting-up moment, meanwhile, potential differences are prevented from being generated on the current limiting resistor, the fuse can be effectively prevented from being burnt out by the impacts of the large currents, and the fault rate of the fuse of the industrial frequency transformer is lowered. In addition, high cost caused by transformer power increase through the mode of increasing rated currents of the fuse can be avoided.

The invention relates to a lead storage battery production method, a lead storage battery, an electrolyte production method and an electrolyte. The lead storage battery production method comprises anelectrolyte production process, wherein during the electrolyte production process, distilled water is treated into small-molecular-group distilled water through water electrifying equipment and is then mixed with pure sulfuric acid. The electrolyte prepared by adopting the method is small in moleculer group number, and after the electrolyte is mixed with the sulfuric acid, a sulfuric acid solutionis more uniform. If the sulfuric acid and the water are mixed more uniformly, the current density distribution of a pole plate is more uniformly when the pole plate is charged and discharged, the potential difference of different parts of the battery is avoided, the polarization of the battery is reduced, meanwhile, the resistance of the pole plate can be reduced, the exothermic reaction of the battery during charging is reduced, and active substances can more favorably participate in charging and discharging, so that the charging acceptability of the storage battery is improved. In addition,a method for increasing the specific energy of the battery through only replacing the electrolyte not only can be accomplished at the design production stage of the battery, but also can be used on amature product and a recycled product.

The invention relates to alkaline polishing liquid for inhibiting galvanic corrosion of a copper-ruthenium barrier layer and a preparation method of the alkaline polishing liquid. The polishing liquid is prepared from the following components in percentage by weight: 0.3 percent of H2O2, 0.5 percent to 5 percent of beta-hydroxyethylenediamine, 0.1 percent to 0.3 percent of ethylenediaminetetraacetic acid-tetra-tetrahydroxyethylethylenediamine, 0.1 percent to 5 percent of an FA / O type surfactant, 0.8 percent to 1.5 percent of a pH inorganic acid regulator and the balance being de-ionized water; the pH value of the alkaline polishing liquid is 9 to 10; the alkaline polishing liquid is obtained through a mixing manner and an inhibitor does not need to be added; the alkaline polishing liquid is easy to wash and the potential difference between Ru and Cu is effectively overcome; the current density of the galvanic corrosion is reduced and a serious galvanic corrosion problem between the Ru and the Cu is solved; the galvanic corrosion between the Ru and the Cu is inhibited very well.