36results about How to "Avoid potential difference" patented technology

The invention discloses a crystallizer internal surface electroplating production line, which includes a washing section, an electroplating section, a hoisting device and an electrolyte solution circulating fluid supply system. The electroplating section is provided with a crystallizer fixed base, a tubular crystallizer and an anode titanium basket. The crystallizer fixed base is provided with an electrolyte solution feed pipe, a sealing pad and an anode lead-out device. The anode titanium basket is arranged on the base, is mounted vertically and is equipped with an upper electrode lead-out terminal and a lower electrode lead-out terminal. The crystallizer is vertically arranged on the sealing pad of the base, and is sleeved outside the anode titanium basket. The upper side of the crystallizer is provided with a seal hanging basket and a sealing pad, the seal hanging basket is equipped with a drain pipe, the seal hanging basket is provided with a mechanical compression device, the seal hanging basket is in compressed sealing connection with the crystallizer upper end through the sealing pad. An electroplating cathode is in compressed electric connection with the crystallizer. The hoisting device is equipped with a crane and a workpiece fixture. And the washing section consists of a washing liquid cleaning tank, an acid liquid cleaning tank, a clear water cleaning tank, and a pure water cleaning tank.

The invention relates to a method for preventing the corrosion of a tungsten plug. The method comprises the following steps of: providing a semiconductor substrate with a tungsten plug, wherein the tungsten plug is connected with a metal lead which is formed on the tungsten plug and incompletely covers the tungsten plug; and illuminating the metal lead by adopting arc light or ultraviolet light until positive charges on the metal lead are eliminated. After the method for preventing the corrosion of a tungsten plug is adopted, the positive charges on the metal lead are removed by adopting the arc light or ultraviolet light illumination method so as to avoid the potential difference between the metal lead and the tungsten plug, avoid the generation of an electrochemical reaction and avoid corroding the tungsten plug in the following cleaning process.

Provided is 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 according to the present invention comprises a valve stem 6 and a valve bush 7 that slidably supports the valve stem 6. The valve stem 6 is formed from a forged part made of a Ni-based superalloy and the valve bush 7 is formed from a cast part made of a Ni-based superalloy. The preferable surface roughness of a sliding surface of the valve stem 6 in contact with the valve bush 7 and the preferable surface roughness of a sliding surface of the valve bush 7 in contact with the valve stem 6 is 100 μm or less in units of Rz.

The invention relates to an overhead line system comprising overhead conductor rails (1, 16), which are fixed in the center region thereof by a fixed point to a structure (14) and are otherwise connected to the structure (14) by way of moveable support point legs (11). According to the invention, at least one of the overhead conductor rails (1, 16) comprises a transverse carrier (2) at the upper side thereof, two downwardly directed tensioning arms (8) originating from said transverse carrier at connecting points for holding a contact wire (9). The transverse carrier (2) comprises conically tapered moldings (3) on both sides of the connecting points of the tensioning arms (8), which moldings can be inserted in corresponding recesses (4) of a clamping fitting (5).

The invention discloses a sewage treatment method based on sewage treatment equipment. The sewage treatment equipment for the sewage treatment method comprises a system framework, a vacuum collectingmechanism, a scraping slag precipitating mechanism, a super-gravity drying mechanism, a precipitate electrolyzing mechanism and an electric control cabinet, wherein the scraping slag precipitating mechanism is provided with an area A, an area B, an area C and an area D; the super-gravity drying mechanism comprises a centrifugal system, a heating system, a deodorizing system, a separating system, and a cooling system; the mechanisms and the systems are respectively cooperated in working. The sewage treatment method has the advantage that the three stages of precipitating and filtering and the three stages of treatment can be performed on the sewage, so as to obtain the treated water with high cleanliness.

The invention relates to an inductance coil, particularly an inductance coil without iron core for use in electric power grids, comprising at least two cylindrical winding layers (1), which are disposed concentrically with respect to a coil center line (7) and are connected electrically in parallel. The inductance coil comprises at least one means for reducing or minimizing sound emissions developing during operation of the inductance coil. At least the outermost winding layer (1) is designed as a current-conducting, acoustic shield winding (18) with respect to the winding layer (1) adjoining in the direction of the center line (7), wherein the shield winding (18) is dimensioned electrically such that it is designed for the transmission of a current intensity which is between the 0.1% to the maximum 50% of the current intensity transmitted by the adjacent winding layer (1) towards to the direction of the coil center line (7). The invention further relates to a clamp-like retaining element disposed on at least one face end of the inductance coil for reducing sound emissions.

An electronic component comprising at least two connection elements (2,7,8), each provided with at least one contact surface (13.1, 13.2, 13.3, 9, 10) which is used to fix the electronic component (1) to a surface of a printed circuit board. An at least partially plane cooling surface is formed on the first connection element (2), for placing on a cooling body that is oriented in the direction of the side of the electronic component (1) opposing the printed circuit board. The first connection element (2) has at least one raised area (3.1, 3.2, 3.3) on the side thereof facing the printed circuit board, on which the contact surface (13.1, 13.2, 13.1) of the first connection element (2) is formed. Said first connection element (2) also has at least one recessed area (4, 4′) in which the at least one other connection element (7, 7′; 8, 8′) is arranged.

The embodiment of the invention provides a display driving circuit, a display unit and a driving method thereof, relates to the technical field of displaying, can prevent the feed-through effect from influencing the potential differences between pixel electrodes and a common electrode, and can improve the displaying quality of a picture. The display driving circuit comprises a gate driving unit, a source driving unit and a circuit unit, wherein, the gate driving unit is used for controlling a TFT (Thin Film Transistor) to be switched on; the source driving unit is used for outputting signals to a source electrode of the TFT; the circuit unit is used for supplying electricity to the common electrode; when the TFT is switched on, the circuit unit outputs a first voltage to the common electrode; when the TFT is switched off, the circuit unit outputs a second voltage to the common electrode; and in addition, the first voltage is different from the second voltage.

An electrochemical hydrogen compressor comprises a unit cell that includes: an electrolyte membrane having hydrogen ion conductivity; an anode current collector stacked on one main surface side of the electrolyte membrane, a support member (for example, a flow field member or an anode separator) arranged so as to face the anode current collector; and a cathode current collector stacked on another main surface side of the electrolyte membrane, wherein the anode current collector is formed of a hydrophilic conductive material having a plurality of vent holes and has a surface facing the support member, the surface being subjected to a water-repellent treatment.

The invention provides a pipeline anticorrosion coating and an anticorrosion pipeline, wherein the pipeline anticorrosion coating is tubular and is used for wrapping a pipe body; the pipeline anticorrosion coating comprises an inner insulating layer, a semi-conductive bonding layer and an outer insulating layer, and the inner insulating layer, the semi-conductive bonding layer and the outer insulating layer are sequentially arranged from inside to outside in the radial direction of the pipeline anticorrosion coating; the semi-conductive bonding layer is a uniform mixture of an adhesive and semi-conductive particles; and the semi-conductive bonding layer is bonded with the inner insulating layer and the outer insulating layer. The pipeline anticorrosion coating can improve the anti-corrosion effect of the pipeline, and particularly can resist the damage of stray current to the pipeline.

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 discloses a battery assembly, a battery protection chip and an electronic product, wherein the battery protection chip comprises a power supply pin, a grounding pin, a current detection pin, a discharge control pin and a charge control pin, and also comprises a voltage control circuit, a discharge control circuit and a charge control circuit internally. The discharge control pin and the charge control pin of the battery protection chip are respectively used for controlling a first NMOS tube electrically connected with the negative electrode end of the battery and a second NMOS tube electrically connected with the negative electrode end of an external power supply, and the voltage control circuit generates stable control voltage, so that the conduction state of the two NMOS tubes is not influenced by the voltage drop of the battery. And the potential difference caused by no common ground inside and outside due to disconnection of the battery negative electrode end inside and outside the battery is effectively 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.

In order to reliably determine the supply voltages (U_i) of the individual phases (L1, L2, L3) of a load (4) in a multiphase supply network (2), in particular a three-phase supply network, a measuring module (6) is provided and is used to determine the supply voltages (U_i) from measuring voltages (U_i,mess) with the aid of a matrix operation. The matrix operation is used, in particular, to compensate for potential differences or potential shifts between the measuring system and the supply network (2) without the need for hardware measures, for example a voltage transformer.

The invention discloses a method for solving skip plating of a fixed position of a PCB (Printed Circuit Board) caused by a battery effect, which comprises the following steps of: providing a production board, arranging a solder resist windowing position to be subjected to nickel-gold immersion treatment and antioxidant treatment on the production board so as to expose a PAD, and arranging a non-plated-through hole and a plated-through hole on the production board; the PAD comprises a first PAD connected with the non-plated-through hole, a second PAD connected with the plated-through hole and/or a third PAD not connected with the hole; wherein the first PAD is subjected to nickel-gold deposition treatment, the second PAD connected with the plated-through hole and the plated-through hole are subjected to nickel-gold deposition treatment or anti-oxidation treatment at the same time, and the third PAD with the distance smaller than 20 mil s from the plated-through hole and the plated-through hole are subjected to nickel-gold deposition treatment at the same time; after a film is pasted on the production board, windowing is conducted on the positions corresponding to the non-plated-through holes and the positions to be subjected to nickel and gold immersion treatment; carrying out chemical nickel and gold immersion treatment on the production board; and after the film is removed, the production board is subjected to anti-oxidation treatment. The method effectively solves the problem of skip plating of the PAD in the prior art.