352results about How to "Reduce voltage" patented technology

An apparatus is dedicated to controlling the voltage of a battery comprising at least two modules connected in series and each comprising at least one electrochemical cell, and each coupled to voltage balancing means. The apparatus comprises measurement means for determining first voltages across the terminals of each of the modules, calculation means for measuring a second voltage across the terminals of the battery and for determining a mean voltage per module representative of the second voltage divided by the number of modules, and processor means for comparing each measured first voltage with the mean voltage per module and for delivering to the balancing means signals representative of the result of the comparison whenever the first voltage of a module is greater than the mean voltage, such that the balancing means reduce the voltage across the terminals of the module.

An energy-saving and loss-reducing optimization method for a distributed photovoltaic active power distribution network comprises the following steps: performing unified scheduling on distributed photovoltaic output through an active coordination strategy, generating a photovoltaic output predicted value, correcting an error of the photovoltaic output predicted value, and forming a photovoltaic output curve; analyzing a real-time energy flow state in the power distribution network according to a photovoltaic output curve, dynamically adjusting a charging and discharging strategy of photovoltaic output and energy storage in combination with a load demand and a voltage level of a node of the power distribution network, and optimizing an energy transmission path; according to the analysis result of the photovoltaic output curve and the energy storage strategy, a multi-objective optimization model is constructed, the current state and the future operation demand of the power distribution network are comprehensively balanced, and the weight between optimization objectives is dynamically adjusted; and a multi-objective optimization result is applied to actual power distribution network operation, a self-learning closed loop is formed through real-time monitoring and feedback, photovoltaic output curve correction and strategy optimization, and the distributed photovoltaic active power distribution network is optimized.

The invention relates to the technical field of integrated circuits, and discloses an overcurrent protection circuit, a chip and electronic equipment, and the overcurrent protection circuit comprises a mistaken touch prevention module, a comparison module, a threshold generation module, a current detection module and a power supply. The first end of the comparison module is connected with the current detection module and the mistaken touch prevention module, and the second end of the comparison module is connected with the threshold generation module; the mistaken touch prevention module is connected with the power supply and comprises a first capacitor unit, a first resistor unit and a first switching device; the first end of the first switching device is connected with the first end of the comparison module, the control end of the first switching device is connected with the first end of the first resistor unit and the first end of the first capacitor unit, the second end of the first resistor unit is grounded, the second end of the first switching device is grounded, and the second end of the first capacitor unit is connected with a power supply. Based on the scheme, false triggering of over-current protection can be effectively avoided, and the safety of the chip is improved.

The invention relates to an organic compound, and an organic electroluminescent device and an electronic device comprising the same. The structural formula of the organic compound comprises the structure shown in the formula I. When the organic compound is applied to the organic electroluminescent device, the performance of the device can be remarkably improved. # imgabs0 #

The invention relates to the technical field of photoelectricity, in particular to a light-emitting diode chip and a preparation method thereof and an LED. In the preparation method provided by the invention, an N-type semiconductor layer in a non-preset area is subjected to second photoetching treatment and second dry etching, etching gases adopted by the second dry etching are CF4 gas and Ar gas, and the etching gases adopted by the second dry etching are CF4 gas and Ar gas; therefore, the Si doping concentration of the N-type semiconductor layer in the non-preset area is lower than the Si doping concentration of the N-type semiconductor layer in the non-first area, third photoetching processing and third dry etching are carried out on the N-type semiconductor layer in the preset area, and the etching gas adopted by the third dry etching is SiCl4 gas and Ar gas, so that the Si doping concentration of the N-type semiconductor layer in the non-preset area is lower than the Si doping concentration of the N-type semiconductor layer in the non-first area. According to the invention, the specific etching gas is adopted twice to carry out the etching treatment in the specific region, so that the voltage of the chip is reduced, and the brightness of the chip is improved at the same time.

The invention belongs to the field of organic electroluminescent materials, and discloses a blue light host material, a preparation method and an organic electroluminescent device. The structure of the blue light host material is as shown in a chemical formula I: # imgabs0 #. After the blue light host material provided by the invention is applied to the organic electroluminescent device, the driving voltage of the photoelectric device can be reduced, the luminous efficiency of the photoelectric device can be improved, and the service life of the photoelectric device can be prolonged.

The invention relates to the technical field of lithium ion battery recovery, in particular to an electrochemical recovery method of a retired lithium iron phosphate battery, which comprises the following steps: preparing an electrode and constructing an electrolytic tank; performing an electrochemical leaching lithium extraction reaction and a circulating experiment; lithium precipitation and anode recovery; and regenerating the electrolyte. According to the method, the retired lithium iron phosphate battery electrode material is recycled by adopting an electrochemical selective leaching lithium extraction technology, the recovery rate of lithium can reach 89% or above, the recovery rate of iron phosphate can reach 90% or above, the regeneration rate of an anode side electrolyte and a cathode side electrolyte can reach 95% or above, and the selectivity of lithium leaching can reach 900 or above.

The invention belongs to the field of organic electroluminescence, and provides a metal iridium complex, a preparation method thereof and an organic electroluminescent device. The structural general formula of the metal iridium complex is shown in the specification. The metal iridium complex provided by the invention has the advantages of low evaporation temperature, high photo-electrochemical stability, high luminous efficiency, long device life and the like, the preparation method provided by the invention is simple in process, the prepared product is high in purity and suitable for industrial production, and the problem that the luminous efficiency of an existing luminous material is insufficient is solved.

Belonging to the technical field of sewage treatment, the invention discloses an efficient purification device, which comprises: a housing, the top of which is detachably provided with a water inlet shell; the centrifugal mechanism comprises a centrifugal cylinder, a rotating cylinder and a mounting plate, the rotating cylinder is fixedly connected to the bottom of the centrifugal cylinder, the rotating cylinder is rotatably connected to the interior of the mounting plate, and a driving motor is fixedly mounted at the bottom of the mounting plate; the water inlet adjusting mechanism is arranged between the water inlet shell and the centrifugal barrel, and the water inlet adjusting mechanism comprises a water inlet plate, an adjusting disc and two L-shaped plates. Through cooperation of the centrifugal mechanism and the water inlet adjusting mechanism, when the sewage amount is increased, the centrifugal filtering speed is increased, and the sewage introduction amount is reduced, so that sewage accumulation under the normal use condition is avoided, and through the arranged alarm mechanism, an alarm can be given out when the sewage accumulation is caused by excessive filter residues, and the filter residues are lifted and cleaned.

The utility model discloses a lithium battery positive and negative electrode composite metal foil current collector structure which comprises a composite metal foil which comprises a first outer metal layer, a second outer metal layer and an inner polymer film layer fixedly clamped between the first outer metal layer and the second outer metal layer. Fuse structures are arranged on the first outer metal layer and the second outer metal layer at intervals, the fuse structures divide the first outer metal layer and the second outer metal layer into external connection areas, isolation areas, current collecting areas and fuses, and the external connection areas are used for collecting current in the current collecting areas and are connected with battery terminals. According to the lithium battery positive and negative electrode composite metal foil current collector structure, the short-circuit current threshold value when internal short circuit happens to the two electrode plates can be reduced, the short-circuit area is isolated outside a loop, and meanwhile damage to the positive electrode and the negative electrode caused by external short circuit is reduced.

The invention, which belongs to the technical field of high-voltage direct-current power transmission, discloses an all-condition equivalent test device for a capacitor for direct-current power transmission, comprising an alternating-current voltage test module and a direct-current voltage test module. After the alternating-current voltage test module and the direct-current voltage test module are connected in parallel, one end is connected with a capacitor to be tested, and the other end is grounded; the alternating-current voltage test module is used for outputting alternating-current voltage with adjustable amplitude and frequency; the direct-current voltage test module is used for outputting direct-current voltage with adjustable amplitude and boost rate; the alternating-current voltage test module is used for outputting alternating-current voltage with adjustable amplitude and frequency; the DC voltage test module is used for outputting a DC voltage with an adjustable amplitude and an adjustable boost rate. According to the invention, the problem that the test performance of the DC support capacitor does not accord with the practical application of engineering because the existing test device can only output single DC voltage or AC voltage is solved, and effective assessment of the full-working-condition stress of the capacitor is realized by inputting different working-condition voltage stress waveforms.

The invention provides a preparation process method of a porous nickel-loaded hydrogen evolution electrode. The preparation process method of the porous nickel-loaded hydrogen evolution electrode comprises the step of loading a nickel-zinc alloy on a substrate through an electroplating process, zinc is reacted and leached through an alkaline activating solution, and the porous nickel electrode is obtained. A nickel-zinc alloy is loaded on a substrate through an electroplating process, and zinc is leached by reaction through an alkaline activating solution, so that the porous nickel electrode is obtained, and the technical problem that an efficient hydrogen evolution electrode is lacked in the prior art for hydrogen production by alkaline electrolysis of water is solved.

The invention provides a composite positive electrode material, a preparation method thereof, a positive electrode plate containing the composite positive electrode material, a battery and an electric device. The composite positive electrode material comprises a positive electrode active material and a coating layer, the coating layer coats at least part of the surface of the positive electrode active material, the coating layer comprises a composite material, the composite material comprises particles containing an M simple substance and a lithium ion conductor material attached to the surfaces of the particles containing the M simple substance, and M comprises at least one of S, Se and Te.

The invention discloses a high-durability FeFET based on a ferroelectric semiconductor channel and an anti-ferroelectric gate dielectric and a preparation method of the high-durability FeFET. A back gate electrode layer, an anti-ferroelectric gate dielectric layer, a ferroelectric semiconductor channel layer, a top gate high-k gate dielectric layer and a top gate electrode layer are sequentially stacked in a FeFET structure, and the anti-ferroelectric gate dielectric layer serves as a back gate dielectric layer; the top gate high-k gate dielectric layer serves as a top gate dielectric layer, the thickness of the back gate dielectric layer is larger than that of the top gate dielectric layer, and an asymmetric double-gate structure is formed. According to the invention, the hafnium oxide-based anti-ferroelectric thin film is used for replacing a ferroelectric thin film as a gate medium of the FeFET, so that the operation voltage is effectively reduced; no interface layer is arranged between the ferroelectric semiconductor channel and the anti-ferroelectric gate dielectric, so that durability failure caused by charge trapping and defect generation associated with the traditional FeFET and the interface layer is inhibited; the out-of-plane spontaneous polarization continuous, precise and adjustable characteristic of a ferroelectric semiconductor channel and the gate storage mode and the channel storage mode which are switched mutually based on the asymmetric double-gate structure of the FeFET are hopeful to enable the FeFET to show higher durability.

The utility model provides a water distribution device of a multifunctional submersible pump, and belongs to the technical field of mechanical equipment. The technical problem that the use scene of a water distribution device of an existing multifunctional submersible pump is limited is solved. The water distribution device of the multifunctional submersible pump comprises a permanent magnet synchronous motor and a pump assembly, the permanent magnet synchronous motor comprises a motor shell and a motor shaft, the pump assembly comprises a volute and an impeller arranged in the volute, a water inlet connecting piece is fixedly connected between the volute and the motor shell, and the upper end of the motor shaft penetrates through the water inlet connecting piece to be fixed to the impeller. A water outlet section is fixedly welded to the upper portion of the volute and provided with a vertically-through water passing channel, and the upper portion of the water outlet section is detachably and fixedly connected with a water distribution device capable of adjusting the oxygenation area. The oxygen increasing device can be used in more scenes to meet individual requirements, and the oxygen increasing effect is further improved.

The present invention discloses a conductive carbon coating anode for copper electroplating process and its preparation method and application. The conductive carbon coating anode for copper electroplating process is based on a titanium plate, and a layer of conductive carbon coating is applied on the surface of the titanium plate by vacuum sputtering. The preparation method of the conductive carbon coating anode is to first roughen the titanium plate, and then use a high-purity carbon material as a target material to apply a dense conductive carbon coating on the titanium substrate in a vacuum by sputtering; then, the carbon coating titanium anode is energized under air-tight conditions to heat it to 1000-1500°C, energize it for 5-10 hours, and obtain a conductive carbon coating anode for copper electroplating process after cooling. The conductive carbon coating anode of the present invention is low in price, has better film thickness uniformity, and better conductivity.

The invention discloses an integrated circuit low-power-consumption design method based on dynamic voltage and frequency regulation, which relates to the technical field of integrated circuits, and comprises the following steps: reducing power supply voltage: increasing transistor delay time, reducing circuit response speed and reducing threshold voltage. According to the invention, by realizing dynamic voltage and frequency adjustment on the integrated circuit, a voltage range can be set according to design parameters and performance requirements of the circuit under the condition that the working stability of the integrated circuit is ensured, the integrated circuit can be ensured to operate stably when the voltage is adjusted in the range, and meanwhile, the integrated circuit is enabled to operate stably. Meanwhile, the influence of the voltage change on the circuit performance can be monitored, a proper frequency range is set, when the frequency is adjusted, it is ensured that the integrated circuit can stably operate within the preset frequency, meanwhile, the performance requirement is met, and the purpose of reducing power consumption under the condition that the stability of the integrated circuit is ensured is achieved.

The invention provides an organic light-emitting device and a deuterated mixture, the deuterated mixture comprises a deuterated mixture prepared from a compound A through a deuteration reaction, and the organic light-emitting device comprises an anode, a cathode and an organic layer located between the anode and the cathode; the material of the organic layer comprises a deuterated mixture and a doping material; the deuterated mixture comprises a deuterated mixture prepared from a compound A through a deuterated reaction. The organic light-emitting device provided by the invention has relatively low voltage and relatively long service life.

The invention discloses a method for improving alkaline water electrolysis hydrogen production efficiency by using electrolyte concentration difference, and belongs to the technical field of water electrolysis hydrogen production. The method comprises the following steps: adding KOH electrolyte with the concentration of 30wt% into the cathode region on one side of the diaphragm, and adding KOH electrolyte with the concentration of 35wt% into the anode region on the other side of the diaphragm; and electrifying the electrolytic bath, controlling the temperature to be 80-90 DEG C, and carrying out electrolytic reaction on the water under the action of the electric field. The hydrogen production efficiency of alkaline electrolyzed water is improved by utilizing the electrolyte concentration difference, the hydrogen production efficiency and the hydrogen purity can be improved, the energy consumption and the equipment cost can be reduced, the reliability and the durability of the system are improved, meanwhile, the environmental influence is reduced, and a positive role is played in promoting the production and the application of green hydrogen.

The utility model discloses a tubular ozone generator which comprises a glass tube, an anode steel tube is inserted in the glass tube, a cathode steel tube is sleeved on the outer side of the glass tube, and a discharge gap is formed between the outer wall of the glass tube and the inner wall of the cathode steel tube; a plurality of positive pole connecting points are arranged in the positive pole steel tube, the positive pole connecting points are connected with a high-voltage generator through wires, and a discharge gap between the outer wall of the glass tube and the inner wall of the negative pole steel tube is 0.5-1mm. According to the utility model, the cylindricity of the outer surface of the positive discharge electrode can be better, so that a smaller discharge gap is kept, the energy consumption of unit ozone output can be ensured, and in addition, the power supply is connected with the discharge electrode in a multi-point manner, so that the discharge effect is better.

The invention discloses a quasi-solid polymer electrolyte and a preparation method thereof, and belongs to the field of lithium ion batteries. The method comprises the following steps: preparing a polyurethane urea type polymer containing dynamic covalent bonds, setting a time gradient on the basis of the polyurethane urea type polymer through a post-soaking method, and screening out a quasi-solid polymer electrolyte with excellent mechanical properties and ionic conductivity; and fluoroethylene carbonate (FEC) is added into the soaking solution as a stabilizer of the electrolyte, so that the mechanical property and the cycling stability are further improved. The synthesis method of the healable quasi-solid polymer electrolyte capable of balancing toughness and ionic conductivity, provided by the invention, has the characteristics of simplicity and rapidness in operation, high synthesis efficiency, controllable process and low cost, and has a wide application prospect.

The energy-saving brake comprises a coil body shell, a rubber ring is fixedly connected to the interior of the coil body shell, an armature plate is detachably connected to the right end of the coil body shell, a lining is fixedly connected to the right end of the armature plate, and a bottom plate is detachably connected to the right end of the lining. Connecting rods are slidably connected to the interiors of the front side and the rear side of the bottom plate, limiting blocks are fixedly connected to the exteriors of the connecting rods, a copper wire outlet groove is formed in the bottom of the coil body shell, a gear shaft sleeve is fixedly connected to the left end of the bottom plate, and groove holes are formed in the sides, away from each other, of the two connecting rods. According to the energy-saving brake, the mode of the brake does not need to be replaced, the voltage of the brake during working is reduced by adjusting the specification of the coil, the energy-saving effect is achieved, equipment can be rapidly installed and disassembled, and therefore efficient overhaul can be conducted when needed, and normal operation of the equipment can be guaranteed.

The invention discloses an intelligent plasma generator, comprising an outer shell; the outer shell comprises an upper circuit board, a lower circuit board, two main side plates, two secondary side plates and a partition plate; the ion generating plates are divided into multiple groups and are respectively arranged in multiple generating chambers; multiple strip-shaped hollow holes are provided on the ion generating plates; the positive electrode and the negative electrode are staggered between the strip-shaped hollow holes; the intelligent detection unit is installed on the upper circuit board and is used to monitor the temperature, humidity and wind speed of the environment; the main controller is installed on the upper circuit board; the main controller comprises a high-frequency AC power supply and an intelligent control system; the high-frequency AC power supply is electrically connected to the positive electrode and the negative electrode, and the intelligent control system is electrically connected to the intelligent detection unit and the high-frequency AC power supply respectively. The invention has a higher degree of intelligence and a better reaction effect.

The invention provides a dibenzofuran derivative, application thereof and an organic electroluminescent device, the dibenzofuran derivative has a structure as shown in a formula I or a formula II, and through the design of a molecular structure, the dibenzofuran derivative has excellent carrier transport rate and energy transfer efficiency, proper HOMO and LUMO energy levels and excellent electron injection and transport capabilities, and can be used for preparing the organic electroluminescent device. And the compound has a specific spatial configuration and higher light extraction efficiency and thermal stability. The dibenzofuran derivative is excellent in photoelectric property, is used for the organic electroluminescent device, and can effectively improve the luminous efficiency of the device, reduce the driving voltage and prolong the service life, so that the device has better comprehensive performance.

The invention discloses a laser welding device with a protection facility, and belongs to the technical field of laser welding, the laser welding device comprises a machine base, and a through hole is formed in the top of the machine base; the movable frame is slidably connected to the outer side of the machine base in a sleeving mode, driving motors are fixedly installed on the two sides of the machine base, and lead screws are fixedly connected to output shafts of the driving motors; the welding mechanism comprises a mounting frame, an electric push rod, a laser welding gun and a triggering mechanism, and the electric push rod is fixedly mounted at the top of the mounting frame; the thickness measuring mechanism comprises a support, two rotating wheels and two sliding frames, and the two sliding frames are connected to the bottom of the moving frame in a sliding and sleeving mode. Through the cooperation of the welding mechanism and the thickness measuring mechanism, the welding power and the feeding speed can be automatically adjusted in the welding process according to the thickness of the plates, the welding device adapts to welding work of the plates with different thicknesses, the welding temperature can be monitored, and accidents caused by overheating can be avoided.

A suppression element includes a passivation composition supplier and a polar solution supplier. The passivation composition supplier is capable of releasing a metal ion (A), selected from a non-lithium alkali metal ion, an alkaline earth metal ion or a combination thereof, and an aluminum etching ion (B). The polar solution of the polar solution supplier carries the metal ion (A) and the aluminum etching ion (B) to an aluminum current collector to etched through thereof, and the metal ion (A) and the aluminum ion, generated during the etching, are seeped into the electrochemical reaction system. Then,the positive active material is transferred to a crystalline state with lower electric potential and lower energy, and the negative active material is transferred y to an inorganic polymer state with higher electric potential and lower energy to prevent the thermal runaway from occurring.

A port-reuse bidirectional charger and an application method thereof, comprising: a plurality of switching switches, a rectifier, a plurality of isolated bidirectional DC / DC converters and a charging interface; the rectifier is connected to the AC power of a power grid and is used to convert the AC power into DC power; the input sides of the plurality of isolated bidirectional DC / DC converters are connected in parallel to the rectifier, and the output sides are respectively connected to the charging interface through the switching switches; the storage battery to be charged / discharged is connected to the charging interface, and the number and connection mode of the output isolated bidirectional DC / DC converters are selected by setting the on / off of the switching switch to meet the charging and discharging power requirements of the storage battery. The switching switch is placed on the output side of the charger to realize port reuse. When the power requirements are different, different numbers of chargers can be used in parallel without redesigning the circuit, which is convenient for use.

The present invention provides a thermal insulation film coating device for highway construction, which relates to the field of highway construction. The thermal insulation film coating device for highway construction comprises a traction frame, a placing rod is fixedly installed at the front end of the traction frame, a sleeve is fixedly installed above the front end of the traction frame, a limiting sleeve is fixedly installed at the bottom end of the sleeve, the bottom end of the limiting sleeve is rotatably connected to a main pressure wheel, an extension rod is slidably connected inside the sleeve, a support frame is fixedly installed at one end of the extension rod away from the sleeve, the support frame and the limiting sleeve are fixedly connected by a tension spring, auxiliary extrusion wheels are arranged on both sides of the bottom end of the support frame, and the limiting rod is fixedly installed at the front end of the support frame. The thermal insulation film coating device for highway construction can first roll the thermal insulation film from the middle to drive away the air in the middle part through the main pressure wheel, and then squeeze the thermal insulation film from both sides through the auxiliary extrusion wheels to fix the thermal insulation film, thereby solving the problem of air between the thermal insulation film and the ground in the prior art.

This invention relates to the field of cathode material technology for lithium-ion batteries, specifically a method for in-situ construction of ultrathin amorphous nano-coating materials. The method involves the in-situ construction of ultrathin amorphous nano-coating layers using sol-gel, co-precipitation, and electrodeposition combined with hydrothermal methods. 2 MnO 3 The cathode material is coated to encapsulate Li. x MnO y The amorphous nanostructure is uniform and completely coated on Li. 2 MnO 3 The surface of the positive electrode material (Li x MnO y @Li 2 MnO 3 ), where Li x MnO y It is an amorphous coating layer with a thickness of 0.1-10 nm; this invention utilizes Li 2 MnO 3 The cathode material is coated with an ultrathin amorphous Li. x MnO y While ensuring the high discharge specific capacity of the material, it also significantly suppresses Li 2 MnO 3 The voltage decay was observed, and after assembling it into a coin cell and testing its performance, the coated Li was found to have... 2 MnO 3 The material exhibits zero voltage decay after 50 charge-discharge cycles.

The utility model discloses a kind of dielectric fiber driven grippers, including mounting base and the assembly on the mounting base of several clamping jaw mechanisms, all the clamping jaw mechanisms are distributed along circumference, to realize the automatic centring of object and catch;Each the clamping jaw mechanism includes hingedly connected first clamping jaw and second clamping jaw, and the first dielectric fiber driver for controlling the centripetal or centrifugal motion of the first clamping jaw is connected between the first clamping jaw and the second clamping jaw;The second clamping jaw is assembled on the mounting base.The utility model successfully provides a kind of gripper solution with low driving voltage, simple structure, light weight, high reliability and good grasping adaptability by combining low-voltage dielectric fiber driver with optimized design rigid clamping jaw mechanism, and it has excellent comprehensive performance and good application value.