152 results about "Polarization phenomenon" patented technology

The invention provides a variable-current charging method of a storage battery. The method comprises a constant-flow charging stage, a pulse quick charging stage and an additional charging stage. In the constant-flow charging stage, the storage battery is subjected to constant-flow charging by first charging current until a voltage value of the storage battery reaches a first preset voltage value; in the pulse quick charging stage, the storage battery is subjected to cyclic pulse quick charging in a manner of alternating positive pulse charging and negative pulse charging; when one cyclic pulse quick charging period is ended, a positive pulse current value and a negative pulse current value are reduced; meanwhile, the charging time and the discharging time are shortened; the next cyclic pulse quick charging period is carried out until the positive pulse current value reaches a second charging current value; and in the additional charging stage, the storage battery is subjected to additional charging in a constant-voltage charging manner. Through the variable-current charging method, quickly and efficiently charging a large-capacity storage battery can be achieved; the polarization phenomenon is removed; and the damages to the storage battery are reduced.

The invention discloses a rapid charging method of a lithium ion battery. The method mainly comprises the steps of S1, preparing a three-electrode battery by using a three-electrode battery preparation process; S2, obtaining a lithium precipitation boundary window when the lithium ion battery is charged by using the three-electrode battery; S3, designing a fast step charging strategy according tothe lithium precipitation boundary window; and S4, charging the lithium ion battery by utilizing the fast step charging strategy. The lithium precipitation boundary window of the lithium ion battery to be charged is obtained by using the three-electrode battery, and then the rapid step charging strategy is designed for the lithium precipitation boundary window; the rapid step charging strategy canenable a charging curve in the whole charging process of the battery to meet three Malus laws as far as possible, namely, can enable a charging current to be close to the optimal charging curve as much as possible; and the polarization phenomenon of the battery is controlled, so that the lithium precipitation phenomenon of the battery in charging is avoided, the charging time is shortened, the safety is improved, the service life of the battery is prolonged, and the battery is effectively protected.

The invention discloses a roll-type reverse-osmosis membrane element with a variable-thickness channel net, formed by overlapping and winding a pure-water diversion net, a reverse-osmosis membrane and an inlet diversion net on a center water-producing pipe. The inlet diversion net and the pure-water diversion net are respectively postioned in an inlet channel formed by the inner surface of the folded reverse-osmosis membrane and a water-producing channel formed by adjacent outer surfaces. The roll-type reverse-osmosis membrane element with the variable-thickness channel net is characterized in that the thickness of the inlet diversion net is gradually reduced along the flowing direction of raw water in the inlet channel. After improvement, when the inlet flow rate and the inlet flow value have constant lengths, the thickness of the inlet channel net is reduced, and the inlet flow rate can increase so that the flow rate of water on the membrane surface is increased, therefore, the invention lessens the concentration difference polarization phenomena of the membrane surface at the water concentrating end of the membrane element, stabilizes the desalting rate and the water-generating amount, decreases the pollution rate of the membrane element and prolongs the service life of the reverse-osmosis membrane.

The invention provides a lithium metal alloy negative electrode material. The negative electrode material comprises lithium alloy serving as a framework and metal lithium filling the framework. The lithium alloy has lithium ion conductivity, and compared with a traditional three-dimensional structure only having electron conductivity, a better three-dimensional ion and electron conductivity network can be formed, so that metal lithium is uniformly deposited, lithium dendrites cannot be generated even if charging and discharging are carried out under the condition of great current density, anda remarkable battery polarization phenomenon is not generated. The lithium alloy material which can be subjected to extraction and insertion of lithium is adopted as the structural framework, after metal lithium is used up in the circulating process, the capacity of the alloy framework can be further released, and the circulating performance of the battery is guaranteed. The used raw materials arewide in source, low in price, simple in process and suitable for rapid large-scale production.

The invention discloses an iron-carbon micro-electrolytic filler and a preparation method thereof. The iron-carbon micro-electrolytic filler is prepared from, by mass, 40-75 parts of reduced iron powder, 10-40 parts of carbon powder, 10-20 parts of bentonite, 2-6 parts of a catalyst and 0.5 -5 parts of a pore-forming agent. By adding the catalyst into the iron-carbon micro-electrolytic filler, thereaction activity of the filler can be improved, the polarization phenomenon generated between electrodes along with the prolongation of the reaction time is removed, the efficiency of disposing wastewater is improved, and no hardening and passivation phenomena occur on the surface of the filler. In a roasting process for preparing the filler, since the roasting temperature is 400-700 DEG C, thebentonite cannot be decomposed, and the roasting energy consumption is reduced. In a use process of the filler, the bentonite is not hydrolyzed, has an adsorption effect, plays a certain role in removing pollutants in the wastewater and cannot generate secondary pollution. Because of the addition of the pore-forming agent, the iron-carbon micro-electrolytic filler prepared by the method has the advantages that the porosity is high, the contact area with the wastewater is large, and the disposal effect is great.

The invention provides a formation method of a lead-acid storage battery. The method comprises the steps of firstly, carrying out multi-stage constant-current charge and constant-current discharge, and then carrying out constant-current charge, wherein the total formation time is 45h-70h, and the charge current and the discharge current are 0.05-0.2 C10. The method is used for the formation of the valve-regulated sealed lead-acid storage battery for communication; the polarization phenomenon of the battery in the formation process can be effectively relieved by the multi-stage charge and discharge under the condition that equipment investment is not increased, so that the charging efficiency and the formation efficiency are improved, and the battery capacity is guaranteed.

The invention relates to a method for removing soluble heavy metal ions in situ from soil or mud/powdery deposits. In the method, a negative electrode and a positive electrode are directly inserted into the soil or a material deposit containing the soluble heavy metal ions, the driving power source of the negative electrode and the positive electrode is a pulse power source, and the positive of the pulse voltage output by the pulse power source is connected with the positive electrode, while the negative is connected with the negative electrode. The method provides the pulse power source capable of generating high-impact electric field force, eliminates three electrode polarization phenomena which cannot be overcome by the conventional DC kinetics method, has no secondary pollution on environment, and greatly improves the efficiency of removing the heavy metal ions from the soil or mud/powdery waste materials through in-situ migration by adopting the conventional DC kinetics method.

The invention discloses an FDS-based oilpaper capacitive bushing series polarization model building method. The method comprises the following steps of: 1, enabling each layer of capacitive medium ofan oilpaper capacitive bushing to be equivalent through connecting a capacitor and a resistor in parallel; 2, simulating a relaxation polarization phenomenon of each layer of capacitive medium througha branch circuit connected with the capacitor and the resistor in series, and enabling a relaxation polarization project of each layer of capacitive medium to be equivalent through connecting an RC series branch circuit on the basis of the step 1, so as to obtain a polarization circuit mode of each layer of the oilpaper capacitive bushing; and 3, connecting the n polarization circuit models, obtained in the step 2, of the layers of the oilpaper capacitive bushing to obtain an oilpaper capacitive bushing series polarization model. According to the method, the problem that the model parameter estimation is not correct enough as oilpaper capacitive bushing modeling time domain dielectric spectrum maps are easy to be interfered by environmental noise is solved.

The invention discloses a repair and maintenance type charging method of a lead-acid storage battery. The method comprises the following steps: a continuous and repeated constant-current restricted-voltage output process comprising constant current output, pause, discharging, pause, sweep frequency pulse output, pause, discharging and pause, a standing and stable process and a constant-voltage restricted-current complementary charging process. With adoption of the method disclosed by the invention, in the battery repair and charging process, lead sulfide crystals existing on a battery plate before repair can be broken and dissolved, three polarization phenomena including ohmic polarization, concentration polarization and electrochemical polarization and generated during charging or repair can be eliminated, formation of new lead sulfide crystals on the battery plate can be restrained, generation of high temperature of the lead-acid storage battery can be effectively prevented in repair and charging, time of repair or charging can be reduced, and the service life of the lead-acid storage battery can be prolonged; therefore, the maximum repair efficiency and the maximum capacitance of the lead-acid storage battery can be reached.

The invention discloses a reciprocating rotary type membrane bioreactor which comprises a sewage treatment pond, a membrane separation device, a sludge discharge device, an aeration device, a water inlet pipe and a water outlet pipe. The membrane separation device is arranged in the sewage treatment pond, and a power driving assembly which drives the membrane separation device to conduct reciprocating rotation movement is installed on the lower portion of the membrane separation device. Due to the fact that the membrane separation device conducts the reciprocating rotation movement under the action of the power driving assembly, the surface concentration polarization phenomenon of a membrane separation assembly is significantly reduced, the membrane flux is kept stable, the service life of the membrane assembly is prolonged, and the sewage treatment efficiency is improved. Meanwhile, rejuvenation of the membrane assembly is conducted by rotating the membrane assembly in a rapid and reciprocating mode, traditional cleaning processes of adding chemical drugs or water or gas or the like are not needed, operation is easy, and the consumption of energy resources is greatly reduced.

The invention relates to a method for screening certificate photos. On the basis of software for processing portrait photos, the method is characterized by comprising the following steps: detecting the number of human faces in each photo; positioning human eyes in each photo, and detecting the distance between two eye positions and the inclined angle formed by a connecting line of pupils of two eyes and the horizontal line; detecting the distances from the middle point of the connecting line of the two eyes to upper, lower, left and right edges, and comparing the distances with the distance between the two eye positions; detecting the width and the height of the photo, and comparing the width and the height with the distance between the two eye positions; positioning the human face areas in each photo, detecting the proportion of each grey scale or gray scale zone in the human face areas, detecting the contrast grade of the gray scale in the human face areas, and detecting the average value of the gray scale in the human face areas; and detecting whether the human face areas have polarization phenomena. The method has the advantage of effectively and quickly detecting the quality of the acquired photos.

The invention discloses a method for preparing a modified carbon fluoride positive electrode material, which comprises the following preparation steps: (1) selecting raw materials: including carbon fluoride, additional carbon source, and binder; (2) modifying the carbon fluoride positive electrode Material preparation: Mix fluorocarbons, additional carbon sources and binders according to a certain proportion, put them into a sintering furnace under a nitrogen atmosphere, control the reaction temperature in the furnace, carry out carbothermal reduction treatment on the materials for a certain period of time, and then cool down to obtain The material is the modified carbon fluoride cathode material in the present invention. The present invention utilizes carbothermal reduction method to process fluorinated carbon, improves the electronic conductivity of the material, reduces the internal resistance and polarization phenomenon of the lithium/carbon battery during discharge, and improves the initial voltage hysteresis of the lithium/carbon fluorinated battery. Rate discharge performance.

The invention relates to the field of batteries, and provides a method, device and system for equalizing a lithium battery. The method comprises the steps of in the charging and discharging process ofa lithium battery having a plurality of series-connected electric cores, detecting battery charging and discharging current and terminal voltage of each electric core; estimating open-circuit voltageof each electric core according to an electric core equivalent circuit, the battery charging and discharging current and the terminal voltage of each electric core, and obtaining a first estimated value of each electric core; estimating the residual power of each electric core according to the first estimated value of each electric core, and obtaining a second estimated value of each electric core; starting to perform equalization on the electric cores with the second estimated value meeting a first condition; and stopping equalization on the electric cores with the second estimated value meeting a second condition. Influences imposed on the detected voltage by a polarization phenomenon in the charging and discharging process of the lithium battery is considered, the open-circuit voltageof the electric cores is accurately estimated, the consistence between the electric cores is ensured, and the service life of the lithium battery is prolonged.

The invention discloses a charging method and a charging management system of a lead-acid battery pack for a wind turbine generator system, wherein the charging method is as follows: detecting whether the voltage of a single battery is less than 60% or not, if yes, prompting fault, otherwise detecting whether the voltage is less than 90% or not again, if yes, charging, otherwise jumping to a next single battery to continue detecting; detecting whether the voltage of the single battery is less than 100% or not, if yes, charging until reaching to 100%, then switching to constant-voltage charging, otherwise directly switching to a constant-voltage charging mode; judging whether the single battery charging process of the battery is finished or not, if yes, switching to judge the next single battery, otherwise, continuing constant-voltage charging; after the boost charge stage of each single battery in a battery pack finished, starting voltage detection and corresponding supplementary procedures every half an hour. The charging method and charging management system of a lead-acid battery pack for a wind turbine generator system provided by the invention can be used for shortening the charging time of the battery pack, avoiding the polarization phenomenon of the battery, repairing a part of slightly damaged lead-acid batteries, and prolonging the service life of the lead-acid battery pack.

The invention provides a ferric fluoride/conducting polymer composite material. The ferric fluoride/conducting polymer composite material comprises ferric fluoride and a conducting polymer compounded to the surface of ferric fluoride. The invention further provides a preparation method of the ferric fluoride/conducting polymer composite material. The preparation method comprises the step of mixing ferric fluoride powder, a ferric trichloride solution, conducting polymer monomers, an anionic surfactant and an organic solvent to react, so as to obtain the ferric fluoride/conducting polymer composite material. Aiming at the problems that ferric trichloride has over-low electronic conductivity and expands along the polarization in charging and discharging processes, ferric trifluoride nanoparticles are coated with the conducting polymer by virtue of in situ polymerization and compounding, so that the polarization phenomenon of a ferric trifluoride material in the charging and discharging processes can be effectively overcome, the stability and capacity of the cathode material can be enhanced, meanwhile, the problem that the conductivity of a ferric trifluoride cathode material is too low can be well solved, and therefore, the electrochemical performance of the ferric trifluoride cathode material is improved.

The embodiment of the invention provides a charging method and device. The charging method provided by the embodiment of the invention comprises N charging stages, wherein each charging stage comprises M charging processes; N is an integer greater than or equal to 2; M is an integer greater than or equal to 1; each charging process comprises the steps of charging a battery with constant current until the battery reaches cutoff voltage and charging the battery with constant voltage until the battery reaches cutoff current, wherein the cutoff current used in the charging processes in the ith charging stage is smaller than that used in the charging processes in the (i+1)th charging stage; and the value range of i is [1, N-1]. According to the charging method and device, the polarization phenomenon of the battery is reduced through adjusting the magnitude of the cutoff current and the life of the battery is prolonged.

The invention discloses a lead-free solder containing Sn, Ag, Cu and Co, and belongs to the field of new materials and new application of materials. The lead-free solder contains Co with the mass fraction of 0.05 to 1.0%, and the balance of Sn3.0Ag0.5Cu. The addition of Co can effectively suppress the growth of intermetallic compounds inside or on the interface of the solder joint, improve the stability of the joint microstructure to the temperature and the current density, and inhibit the polarization phenomenon and the occurrence of cavities. The lead-free solder containing Sn, Ag, Cu and Co can simultaneously improve the mechanical performance of the solder joint and inhibit the migration of the solder joint material, and is suitable for soldering materials for electronic products, in particular to the lead-free solder for surface package.

The invention discloses a bicomponent fiber with a piezoelectric effect, a fabric with a piezoelectric effect, a preparing method of the bicomponent fiber with the piezoelectric effect and a preparingmethod of the fabric with the piezoelectric effect. The bicomponent fiber comprises a high-density-polyethylene core layer with the electrical conductivity and a polyvinylidene fluoride skin layer with the piezoelectric effect, and 5%-15% of carbon black is contained in the high-density-polyethylene core layer. Warp yarn adopts the bicomponent fiber with the piezoelectric effect, weft yarn adoptsa commercial conductive fiber or polyester yarn wrapped with thin silica gel, the warp yarn and the weft yarn are woven into a fabric on a weaving machine, and a full-spinning piezoelectric sensor can be formed. According to the bicomponent fiber with the piezoelectric effect, when the piezoelectric fabric suffers from ambient pressure, a polarization phenomenon is generated inside the piezoelectric fabric, mechanical energy is converted into electric energy, and the electric energy is collected and converted into required electrical signals through data collecting equipment. The full-spinning piezoelectric sensor is a great part of intelligent textile development, has great help in the medical field, can be applied to clothing or equipment to monitor respiration signals or the heart rate, and can be applied to the aspects of pressure monitoring, an actuator and the like.

The invention relates to the technical field of water purification, in particular to high-electrode-density electric flocculation device with slidable pole plates and a use method thereof. The device does not use a fixing clamping groove, the pole plates are capable of sliding along the normal direction, and the pole plates are separated by plastic nuts or plastic bars; and after all the pole plates are installed in a housing, the pole plates are fixed by flat air pockets parallel to the pole plates, and the effect of preventing the leakage of water is achieved. Compared with the existing electric flocculation device, the device disclosed by the invention has the advantages that the distance between the pole plates is greatly reduced, and an electrode filling density can be increased by 1-2 times; by increasing the electrode filling density and reducing the distance between the pole plates, a reaction area can be increased, a system resistance can be reduced, and polarization phenomenon can be weakened favourably, thus alleviating the problem that electrodes are liable to passivate; when certain dimensions and processing capacity of a processor are reached, the device disclosed by the invention is capable of reducing electric consumption by 30-60% and prolonging the service life of electrodes 1-2 times; and the device disclosed by the invention is capable of solving the problems of high electric consumption, high electrode passivation rate, short replacement period of the electrodes, and the like which generally exist in electric flocculation methods.

The invention relates to the technical field of electronic products and provides a linear vibrating motor. The linear vibrating motor comprises a motor shell, a stator, an oscillator and two elastic supporting elements which make the oscillator suspended in the motor shell and are used for supporting the oscillator and providing elastic restoring force. The two elastic supporting elements are located at the two ends of the vibrating direction of the oscillator respectively. Each elastic supporting element comprises a plurality of elastic pieces distributed side by side and sequentially and fixedly connected end to end. Elastic arms of the elastic pieces are of a Z-type structure. Each elastic supporting element comprises a first connection point fixedly connected with the oscillator and a second connection point fixedly connected with the inner wall of the motor shell. The polarization phenomenon of a vibrating block in the vibrating process is reduced while vibration feedback of user touch operation is achieved, noise is lowered, and stability and reliability of the whole linear vibrating motor are improved.

The invention provides an electret material and an electrostatic dust collection device. The electret material is formed by mixing polystyrene and polytetrafluoroethylene/polyvinylidene difluoride asraw materials, wherein the grain size of the polytetrafluoroethylene/polyvinylidene difluoride is 1-10 microns. Through an improvement on the electret material, the filtration performance of an electrostatic precipitation filter of a microchannel structure made of the electret material is improved. The electrostatic dust collection device reduces the probability of occurrence of the polarization phenomenon by detecting the environmental particulate matter concentration, designing the structural style of a charged component, controlling emission current, releasing and reestablishing an internalelectric field and reducing the convergence of an internal surface electric field of dust collection microchannels, and then the dust capacity and dust collection efficiency of the electrostatic precipitation filter of the microchannel structure made of the electret material are improved. The cleaning and maintenance period is prolonged while the dust capacity is improved, and the use and maintenance cost is lowered.

The invention discloses a backlight module and a display device. The backlight module comprises a light guide plate, a backlight source located on the side face of the light guide plate and an optical structure located on one side of a light outlet face of the light guide plate; pigment with specific color is arranged in the optical structure; in the direction away from the light source, the content of the pigment in the optical structure becomes higher and higher. Light polarization becomes more serious along with increase of the distance from the backlight module to the backlight source in the prior art, the pigment with the specific color is added into the optical structure at one side of the light outlet face of the light guide plate, the content of the pigment in the optical structure becomes higher and higher in the direction away from the backlight source, light emitted by the backlight source passes through the light guide plate and is mixed with color of the pigment in the optical structure into white light, and the light polarization phenomenon of the backlight module is relieved, new polarization due to the pigment is avoided, the adjusting period is short, and cost is low.

Disclosed herein is a touch panel. The touch panel according to a first embodiment of the present invention includes a transparent substrate that is partitioned into an active region and an inactive region outside the active region, a first electrode that is formed in the active region of one surface of the transparent substrate, a second electrode that is formed in the active region of the other surface of the transparent substrate, and a low dielectric constant film that is formed along a peripheral edge of the active region while being formed in the inactive region of the one surface of the transparent substrate. In the touch panel, touch sensitivity is improved by minimizing influence of a polarization phenomenon on changes in capacitance on the peripheral edge of the active region in which a detection region is reduced.

The invention relates to a TDS (Total Dissolved Solid) detection method and device and belongs to the field of communication. The method comprises the following steps: setting first alternating voltage and second alternating voltage, wherein in the same alternating period, a high electrical level time period of the first alternating voltage and a high electrical level time period of the second alternating voltage have no overlapping; and when a TDS detection probe is used for carrying out TDS detection in a water path to be detected, applying the first alternating voltage and the second alternating voltage to two electrodes of the TDS detection probe respectively to carry out the TDS detection. The device comprises a first setting module and a triggering module. According to the TDS detection method and device provided by the invention, the two electrodes of the TDS detection probe can be effectively prevented from a polarization phenomenon by the alternating voltage so that the probe can stably and reliably work for a long period, errors are reduced and the TDS detection accuracy is improved.