27results about How to "Reduce current density" patented technology

This invention relates to the field of perovskite solar cell technology, and discloses a method for preparing a low-dimensional perovskite thin film and its solar cell. The method for preparing the low-dimensional perovskite thin film is as follows: Step 1, weighing p-fluorophenylethylamine iodine, methyl iodide, lead iodide, formamidine iodide, methyl ammonium chloride, and lead chloride, and dispersing them in a mixed solution composed of dimethylformamide and dimethyl sulfoxide to obtain a low-dimensional perovskite precursor solution; Step 2, dropping the low-dimensional perovskite precursor solution onto a substrate, rapidly spin-coating for 10-20 seconds, and then subjecting it to reverse-order cooling annealing to obtain a low-dimensional perovskite thin film. This invention rapidly forms a low-dimensional perovskite wet film through high-speed spin-coating, followed by reverse-order cooling annealing, which not only enables the preparation of low-dimensional perovskite thin films with vertically grown multiphase structures, but also has good repeatability and reduces the manufacturing cost of battery devices. The reverse-order cooling annealing process described in this invention is simple and suitable for industrial production.

The utility model relates to the technical field of breast pumps, in particular to a heating breast pump which comprises a cover body and a main machine connected with the cover body, the cover body is provided with a heating assembly used for heating and a cover body connector connected with the heating assembly, and the main machine is provided with a main machine connector communicated with the cover body connector. And the cover body connector and / or the host connector are / is provided with an annular conducting end for increasing the conducting contact area. According to the utility model, the conductive contact area is increased by arranging the annular conductive connection end, so that a wider and stable path can be provided when current passes through, the current density of the current at a contact point can be effectively reduced, the situation that the contact point is broken down due to overlarge local current is avoided, the current can continuously and stably pass through the connector, and the service life of the connector is prolonged. Normal power-on work of the heating assembly is maintained, and the problem of heating function failure caused by poor contact is reduced.

This invention relates to the field of hydrogen production technology through water electrolysis, and provides a low-energy-consumption constant-temperature water supply system for ultrapure water electrolysis hydrogen production. The system includes a PEM electrolyzer, an ultrapure water supply unit, a circulating water supply loop, a local purification and bypass unit, a data acquisition module, a data analysis module, an energy consumption determination module, and an energy consumption control module. The data analysis module determines the heat load matching parameters based on current, voltage, circulating flow rate, and inlet and outlet water temperatures, and determines the water quality characterization state and flow characterization state. The energy consumption determination module first determines whether the temperature rise represents the actual heat load. Under non-actual heat load conditions, the energy consumption control module determines the cause of abnormal energy consumption based on water quality and flow state, and performs pump reduction and cooling, short-term flow correction, local purification, or current density reduction control to reduce the additional energy consumption of the constant-temperature water supply.

The application discloses the technical field of electroplating wastewater treatment high-value metal recovery system for electroplating wastewater, including electrolytic cell and electrolytic mechanism, electrolytic cell is connected with infusion tube, infusion tube is connected with electronic flowmeter, electrolytic cell top is detachably connected with cover body, cover body is provided with observation ring groove, cover body is fixedly connected with camera unit; The inside lower side of the electrolytic cell is provided with a sedimentation plate and a stirring unit, the sedimentation plate is in sliding fit with the inner side wall of the electrolytic cell, the bottom of the electrolytic cell is fixedly connected with a first weighing sensor, and the detection end of the first weighing sensor is in abutment with the bottom of the sedimentation plate; The electrolytic mechanism includes a controller, a driving unit, an adjusting unit and an electrolytic unit. The application reduces the generation of concentration polarization and activation polarization phenomenon in the process of electroplating wastewater metal treatment and recovery, recovers the wastewater metal in an efficient state, estimates the treatment and recovery effect of the wastewater metal, and improves the qualified rate of wastewater metal treatment and recovery.

The invention discloses a cathode protection method for an aluminum electrolysis cell, which solves the problem of serious non-uniform abrasion of a cathode caused by physical abrasion and electrochemical corrosion of the aluminum electrolysis cell, and adopts the technical scheme of implementing integral protection on a cathode abrasion area. The cathode protection frame is arranged above the cathode abrasion area, the filling material is arranged in the cathode protection frame, the flow speed of molten aluminum in the cathode abrasion area is reduced by means of the flow choking characteristic of the cathode protection frame, a material sediment accumulation protection layer is formed above the cathode abrasion area, a cathode is protected against erosion abrasion of the molten aluminum, and the service life of the cathode is prolonged. And the current density, the temperature and the aluminum carbide generation speed of a cathode abrasion area are reduced, the cathode abrasion deepening process is delayed, and the purposes of prolonging the safe operation life of the electrolytic cell and reducing the solid waste discharge amount are achieved.

The invention relates to the technical field of fused salt energy storage, and provides an electrode type fused salt heating device, which comprises a first fused salt pond, a second fused salt pond and a heating device, the second molten salt pond is used for storing the heated molten salt; the fused salt heating pipe is connected between the first fused salt pond and the second fused salt pond, and the fused salt heating pipe is connected with the heating electrode; the third molten salt pond is used for mixing the cold salt and the heated molten salt to form molten salt to be heated; the first conveying pipe is communicated with the third molten salt pond and is used for conveying cold salt into the third molten salt pond; the second conveying pipe is communicated with the second molten salt pond and the third molten salt pond and is used for conveying the heated molten salt into the third molten salt pond; and the third conveying pipe is communicated with the first molten salt pond and the third molten salt pond and is used for conveying the molten salt to be heated to the first molten salt pond. According to the technical scheme, the problems of local overheating, fused salt overtemperature decomposition and high electrode corrosion rate in related technologies can be effectively solved.

This disclosure provides a display processing method, apparatus, and display device, belonging to the field of display technology. The display processing apparatus is applied to a display device, the display area of ​​which includes color sub-pixels and white sub-pixels. The apparatus includes: an acquisition module, configured to, when the display device is in video playback mode, acquire a first value of at least one first parameter of a preset area of ​​the display area, the first parameter corresponding to a driving transistor of a pixel driving circuit of the preset area, the value of the first parameter being proportional to the threshold voltage of the corresponding driving transistor; after a first preset time period, acquire a second value of each first parameter; a determination module, configured to determine a target area based on the difference between the second value and the first value, wherein at least a portion of the first parameters of the target area have a difference greater than a first preset threshold; and a processing module, configured to reduce the brightness of the color sub-pixels of the target area. The technical solution of this disclosure can eliminate image retention in display devices.

This utility model relates to the field of lithium battery technology, and proposes a soldering structure and a cylindrical lithium-ion battery. The soldering structure includes multiple parallel and spaced solder lines, and the solder lines are wavy in shape. The width W1 of the soldering structure is 1.6-3.4 mm; the minimum distance W10 between two adjacent solder lines is 0.6-1.1 mm. By controlling the reasonable size of the soldering, problems such as welding explosions and discoloration of solder lines caused by heat concentration due to excessively small soldering can be avoided. At the same time, excessively large soldering can prevent the increase in laser travel, the reduction in welding efficiency and production capacity, and the decrease in welding reliability caused by the expansion of the solder line area, thereby effectively improving welding quality and efficiency.

The utility model belongs to the field of smelting, and particularly relates to a six-electrode ferroalloy submerged arc furnace which comprises a first electrode group, a second electrode group, a first transformer group and a second transformer group, the first electrode group comprises three first electrodes which are arranged in a triangular shape, the first transformer group comprises three first transformers, and every two first electrodes are connected through one first transformer; the second electrode group comprises three triangular second electrodes, the second transformer group comprises three second transformers, and every two second electrodes are connected through one second transformer; the first electrodes and the second electrodes are uniformly arranged at intervals around the same axis, and through the arrangement of the six electrodes, the diameters of the electrodes can be effectively reduced, and heating points are increased, so that a better heating effect is obtained.

The application provides a semiconductor device with more uniform thermal stress distribution on the chip surface, which comprises a substrate of a first conductive type, a plurality of rows of units arranged along the longitudinal direction on the substrate, and a plurality of units arranged along the transverse direction in each row, wherein the units are active units, dummy units or dummy gate units; the active units, the dummy units and the dummy gate units are arranged in any proportion in the transverse direction and the longitudinal direction; the thermal stress on the surface of the semiconductor device is customized by adjusting the proportion of the active units, the dummy units and the dummy gate units in different regions or the length of the source region of the active units or the spacing of the units or the mesa width of the units. The semiconductor device adopts a non-repetitive unit structure layout, and the chip surface temperature is adjusted according to the designer's requirements by adjusting the unit layout or the unit structure; the thermal gradient on the chip surface can be reduced, the large thermal mechanical stress borne by the semiconductor package can be reduced, and the service life and reliability of the device and the interconnection structure thereof can be prolonged.

This invention relates to the field of metal surface treatment technology, specifically to a low-cost, high-corrosion-resistant micro-arc oxidation film for magnesium alloys and its preparation method. First, the magnesium alloy workpiece is pretreated. Then, an electrolyte for the micro-arc oxidation process is prepared. The pretreated magnesium alloy workpiece is used as the anode, and stainless steel as the cathode, placed in the electrolyte for micro-arc oxidation, ultimately yielding a dense oxide film. This invention utilizes an externally controlled electrical parameter process of "online monitoring and regulation control + composite carrier wave," combined with a low-energy-consumption electrolyte system, to achieve the desired dense oxide film. The main components of the oxide film are magnesium silicate, magnesium phosphate, magnesium oxide, magnesium fluoride, and zirconium oxide, resulting in high film hardness and improved wear resistance. It achieves a neutral salt spray test rating of ≥480h (10μm) at level 9, meeting the performance requirements of automotive parts and suitable for large-scale industrial production, with a comprehensive energy consumption reduction of 50%~60%.

This invention relates to the field of motor design and manufacturing technology, and provides a motor structure that solves the problems of poor heat dissipation and easy local overheating in the end windings. The motor structure includes a stator core and windings. The windings include a winding slot portion assembled within a stator core slot and a winding end portion extending beyond the end face of the stator core. The cross-sectional width W of the winding end portion is... end The cross-sectional width W of the portion inside the winding slot is greater than the width of the winding slot. slot And W end >W end,min W end,min This refers to the minimum cross-sectional width of the end winding, determined based on the target temperature difference constraint between the end winding and the slot winding. This invention achieves axial temperature uniformity of the winding without adding a cooling system, eliminating localized hot spots and improving power density and insulation life.

The utility model provides a kind of pole piece structure, roll core pole group and cylindrical battery, including pole piece body, pole piece body has coating area, several pole lug areas are arranged at interval along the length direction of pole piece body, at least one pole lug area is equipped with at least 2 pole lug arranged at interval between pole lug area, and pole lug is connected to the long side of pole piece body;Pole piece structure is after participating in winding and forms roll core pole group, and the pole lug area on pole piece structure is arranged at radial in the center hole of roll core pole group towards one end surface of roll core pole group. It improves the space utilization of battery shell, improves the infiltration problem of electrolyte, improves internal resistance and heat dissipation, and improves electrochemical performance.

This invention discloses a coil design method, a coil, and a transformer. The method includes dividing the coil into at least a first coil and a second coil; and placing the second coil above the first coil along the height direction of the transformer. The first coil is made of a first conductor, and the second coil is made of a second conductor. The width of the second conductor is greater than the width of the first conductor, and / or the thickness of the second conductor is greater than the thickness of the first conductor. This invention can reduce temperature unevenness in the coil, improve the overall temperature rise of the coil, increase material utilization, reduce costs, improve the operating quality of the transformer, and extend the service life of the coil.

The application relates to a phase shifter and an antenna. The phase shifter comprises a substrate, a main feed line and at least one first sub-feed line are arranged on the substrate, the first sub-feed line comprises an arc-shaped line segment, and the main feed line passes through the center of the arc-shaped line segment of each first sub-feed line; a phase shift plate is arranged and comprises at least one phase shift line, each phase shift line is correspondingly coupled with the arc-shaped line segment of each first sub-feed line; and a limiting assembly is arranged and comprises a first limiting piece and a second limiting piece which are connected to the phase shift plate; the substrate is provided with a first matching part and a second matching part which are arranged at intervals; the first limiting piece is guided and matched with the first matching part, and the second limiting piece is guided and matched with the second matching part along the circumferential direction of the arc-shaped line segment, so that the phase shift plate is connected to the substrate by rotating around the first axis, and the coupling position of each phase shift line and the corresponding arc-shaped line segment can be changed when the phase shift plate rotates relative to the substrate. The phase shifter and the antenna have high reliability.

The invention relates to the technical field of motor control, in particular to a three-phase six-wire motor controller, which comprises an independently researched and developed motor driving chip P2850, a power supply module, a sensor group, a communication interface, a driving circuit, a power module and a heat dissipation system. The P2850 chip integrates a special hardware accelerator and an MCU core, executes a hardware FOC algorithm, and accurately regulates and controls six-path phase current in real time; according to the power module, 12 power semiconductor switching devices form two independent three-phase full-bridge inverter circuits. By the adoption of the technical scheme, high-order harmonic current can be effectively restrained, the operation efficiency of the motor is improved, vibration noise is reduced, the torque output and speed regulation range is widened, and the system reliability and the fault-tolerant capability are enhanced.

This utility model belongs to the field of lithium-ion battery technology and discloses a composite current collector and battery electrode. The composite current collector includes a base film and a first conductive layer disposed on a first surface and a second conductive layer disposed on a second surface of the base film. The first and second surfaces are disposed opposite to each other. Along the width direction of the base film, the thickness of the base film decreases from the middle position in the width direction to both sides of the width direction. The base film is axially symmetrically disposed in the width direction. The total thickness of the composite current collector remains consistent throughout the entire composite current collector. When the polymer film is electroplated in an electroplating bath, it can avoid the surface undulation of the base film along the width direction caused by the difference in current density in the electroplating solution. This avoids the situation where the surface of the base film wrinkles or slips and cannot be rolled up, thus reducing the difficulty of subsequent application of the current collector inside the lithium-ion battery.

The invention relates to a membrane-free electrodeionization device, in particular to a resin electroregeneration and deep desalination dynamic balance control method and system of the membrane-free electrodeionization device. According to the method, operation data such as produced water resistivity / conductivity, concentrated water conductivity / ion concentration, flow, temperature, power supply voltage and current and the like are collected on line, an electric field-flow field-ion concentration field multi-field coupling model is constructed and solved, and the interface water dissociation generation rate, the resin ion exchange transformation rate and the foreign ion discharge rate are predicted in real time. Three-rate matching is used as a control criterion, and the current density, apparent velocity and split ratio are adjusted in a linkage manner, so that the device maintains the dynamic balance of the coordination of resin in-situ electric regeneration and ion discharge, inhibits side reaction and ion accumulation, realizes continuous and stable deep desalination under the conditions of no membrane and no additional acid and alkali, reduces energy consumption and improves the reliability of long-period operation.

This invention discloses a high-Q tuned filter, belonging to the field of tuned filter technology. The tuned filter includes two symmetrically arranged resonant cavities, each connected in parallel with an inductor. This invention reduces the current density of a single coil, suppresses high-frequency skin and proximity effects, significantly reduces the high-frequency loss resistance of the inductor, and significantly improves the Q value at the same operating frequency. It directly reduces in-band insertion loss and improves out-of-band rejection depth, resulting in a significant improvement in filtering accuracy and anti-interference capability.

The invention discloses a gallium oxide photoconductive switch device with a light modulation field limiting ring and a preparation method of the gallium oxide photoconductive switch device. The device comprises a Fe-doped gallium oxide substrate; the first N + gallium oxide layer and the second N + gallium oxide layer are respectively arranged on the upper surface and the lower surface of the substrate; the anode metal electrode is arranged in the center of the upper surface of the first N + gallium oxide layer; the cathode metal electrode is arranged in the center of the lower surface of the second N + gallium oxide layer; the dielectric passivation layer covers the upper surface and the lower surface of the whole device, and an electrode region is exposed; wherein a plurality of grooves are formed in the first N + gallium oxide layer; a plurality of grooves are located in the peripheral area of the edge of the anode metal electrode and penetrate through the whole first N + gallium oxide layer; the grooves are filled with Mg-doped semi-insulating gallium oxide materials so as to form Mg-doped light modulation field limiting rings. According to the structural design, the peak field intensity of the edge of the electrode and the current density of the edge of the electrode are reduced, and the withstand voltage threshold and the reliability of the device are improved while the low on-resistance is ensured.

This utility model provides a rotor hook-slot structure for a DC motor, including rotor hooks and rotor slots, both located on the outer circumference of the rotor and evenly arranged in a ring on the outer circumference. The rotor hooks are provided in numbers of 12, and the rotor slots are provided in numbers of 18. A wire group extends outward from the rotor hooks and winds around the rotor slots. This rotor hook-slot structure for a DC motor, by increasing the number of rotor slots to 18 (no longer corresponding to a single slot), reduces the current density in a single slot, thereby reducing the impact of armature current on the main magnetic field, helping to reduce magnetic field inhomogeneity, thus reducing sparks during electrolysis and improving commutation performance.

The utility model belongs to the technical field of power transmission, and particularly relates to a conversion monofilament for a copper-aluminum flexible transition submarine cable, which comprises four embedded blocks which are aluminum alloy pieces, and the melting point of each embedded block is lower than that of pure copper and pure aluminum; the two conductive sections are a copper wire section and an aluminum wire section, a strip-shaped block is arranged at the butt joint end of the conductive sections, a rectangular groove is formed in the end face of the strip-shaped block, and the rectangular groove penetrates through the surfaces of the two sides of the strip-shaped block in the width direction of the strip-shaped block; wherein the butt joint ends of the two conductive sections are inserted in a cross shape, four embedding grooves are formed, and the embedding blocks are arranged in the embedding grooves in a one-to-one correspondence mode, so that the whole monofilament is of a cylindrical structure. According to the utility model, a crisscross clamping design is formed, the contact area of copper and aluminum is increased, radial limiting is formed, the mechanical connection strength is improved, stress concentration is dispersed, the risk of welding spot fracture is reduced, the electrical performance is improved, metallurgical bonding is realized, seamless connection is formed, firm connection is ensured, and the service life is prolonged. And the whole monofilament is kept in a cylindrical structure.

The application relates to the technical field of motors, in particular to a stator, a motor, a household appliance and a garden device. The stator comprises a stator core and windings, the stator core comprises a core body and six winding parts, the six winding parts are arranged on the core body and are arranged at intervals along the circumference of the core body, each winding part is wound with windings, the windings comprise two wire terminals, two adjacent wire terminals on adjacent winding parts are electrically connected to form a wire connection part, two wire connection parts arranged at an angle of 180 degrees form a phase connection end, and each phase connection end is electrically connected with only one phase current. The winding mode makes each phase connection end have four wire terminals, the four wire terminals at each phase connection end play a role in shunting the current, thereby reducing the current density and avoiding the overheating of the windings, and also enabling the windings with small wire diameters to meet the requirements of large-current motors and reducing the requirements on winding equipment. The motor can reduce the current density and increase the service life of the motor through the above-mentioned stator.

The application discloses a novel energy-saving system for production of formed foil, which is used for power distribution and formation treatment of strip-shaped aluminum foil and comprises a rack, a power distribution conveying roller rotatably installed on the rack, a water boiling tank and a formation tank arranged on the inner side of the rack, a water spraying tank arranged between the power distribution conveying roller and the water boiling tank on the inner side of the rack and located obliquely above the power distribution conveying roller. In the application, high-purity water for formation is used as cooling water, so that the strip-shaped aluminum foil does not need to be additionally provided with cooling water, thereby reducing the consumption of cooling water. The high-purity water for formation is used as cooling water, so that the cooling water is heated while the inclined section of the strip-shaped aluminum foil to be cooled after being heated by direct current is cooled, the heated cooling water is directly introduced into the water boiling tank and mixed with high-purity water for hydrating film, the temperature of the high-purity water for hydrating film is increased, and the electric heating energy consumption of the water boiling tank for the high-purity water for hydrating film is reduced.

The application discloses a nickel-copper-nickel-nickel tungsten multilayer plating layer and a preparation method thereof. After pretreatment of a base material, a nickel bottom layer is obtained by first electroplating nickel, a copper layer is obtained by electroplating copper, a nickel intermediate layer is obtained by second electroplating nickel, a nickel tungsten alloy surface layer is obtained by electroplating a nickel tungsten alloy, and then heat treatment is performed to obtain the nickel-copper-nickel-nickel tungsten multilayer plating layer. When electroplating the nickel tungsten alloy, a titanium base-iridium tantalum oxide coating anode is used, and the electroplating solution for electroplating the nickel tungsten alloy is a citric acid system. In the titanium base-iridium tantalum oxide coating anode, the mass fraction of tantalum is more than 5% higher than the mass fraction of iridium. The corrosion resistance of the plating layer is greatly improved through the cooperation of the multilayer plating layer and the improvement of the quality of the outermost plating layer.

The application relates to a battery current probe multi-point synchronous detection structure and a rapid testing method thereof, and belongs to the technical field of battery current probe detection. Two current probes correspond to first and second current connection terminals respectively, and the two terminals are electrically isolated. The axial movable cooperation of the current probe and the probe fixing part and the elastic compression of the elastic part enable the compression process to have stroke compensation capability. The axial through hole of the current probe is integrated with the voltage probe combination part, so that voltage sampling can be arranged in the same body as the large-current probe and a stable sampling channel can be established under the same compression action, sampling errors caused by large-current wire voltage drop and connection state changes are reduced, and the temperature measuring part is arranged close to the contact end face, so that the problems that the single connection interface of the existing single-screw-column large-current probe in the hundreds-of-ampere battery test causes contact resistance fluctuation, is prone to heat and has poor adaptability, and it is difficult to simultaneously consider voltage sampling and contact area temperature acquisition under one-time compression are solved.

The invention discloses a corrosion inhibitor for a metal surface and a preparation method of the corrosion inhibitor, a corrosion inhibition additive and modified benzotriazole react, so that amino groups on the corrosion inhibition additive and double bonds on the modified benzotriazole react, and the corrosion inhibitor for the metal surface is prepared. Lone pair electrons of nitrogen atoms on an imidazoline ring and nitrogen atoms of an amino group outside the ring in a corrosion inhibitor molecule can be coordinated and bonded with an empty d orbit of a metal atom to form a stable coordination compound, and meanwhile, a benzotriazole molecule can also be adsorbed on active sites of an anode region and a cathode region on the surface of metal, so that the corrosion inhibitor has a good corrosion inhibition effect. The corrosion inhibitor molecules form a compact protective film on the metal surface, the anode dissolution process that the metal loses electrons and is changed into ions can be inhibited, the reduction reaction of the electrons of substances such as oxygen in a cathode region is hindered, and the synchronous inhibition on the cathode and anode reaction greatly reduces the current density of corrosion and improves the corrosion resistance of the metal. And corrosive substances are prevented from being in contact with the metal surface.