91 results about "Direct-current discharge" patented technology

The invention provides a storage battery residual capacity and health state rapid detection method and device. The method comprises the following steps of: enabling a storage battery to carry out instant larger current discharging through a controllable discharge circuit, monitoring the discharging current in the discharging circuit in the process by a current sampling circuit, synchronously monitoring the end voltage of the storage battery through a voltage sampling circuit, and utilizing a direct current discharge method to measure the internal resistance of the storage battery, wherein the discharge circuit and the voltage sampling circuit are connected in parallel with two wiring columns of the storage battery, so that the internal resistance of the storage battery is measured according to a Kelvin four-wire system measuring method, and the maximum discharge current, the load voltage and the internal resistance data of the storage battery are obtained; and according to an associated relation model, calculating SOC and SOH of the storage battery. By adopting the method provided by the invention, the residual capacity and the health state of the storage battery can be accurately detected on line.

The invention relates to the technical field of lithium ion battery direct-current internal resistance measurement, in particular to a method for determining battery performance according to direct-current internal resistance of a battery, which is calculated according to a transient voltage jump difference value and instantaneous current of a lithium ion battery and a battery pack at the beginning or ending of charging and discharging. The method comprises the following steps of: (1) monitoring current values and terminal voltages of various batteries on line in the charging and discharging process of the lithium ion battery; (2) detecting and recording a voltage jump value of the battery at the beginning or ending of discharging (charging) of the lithium ion battery; (3) detecting and recording the instantaneous current flowing through the battery at the beginning or ending of discharging (charging) of the lithium ion battery; (4) dividing voltage jump different values of the various batteries by a current value to obtain a ratio called direct-current discharging (charging) internal resistance of the battery; and (5) referring to the pre-determined standard direct-current discharging (charging) internal resistance of the battery to determine the battery performance, wherein the battery is qualified when the direct-current discharging (charging) internal resistance of the battery is smaller than the standard value and the battery is non-qualified when the direct-current discharging (charging) internal resistance of the battery is greater than the standard value.

The invention relates to an internal resistance measuring method of an accumulator, which belongs to a measuring method that the internal resistance of the accumulator is measured by utilizing heavy current direct current discharge method. The specific steps are as follows: (1) a resistance with high power, high precision and low resistance value is selected as the discharge resistance; (2) close of the high power relay is controlled, and the discharge circuit is switched on to cause the accumulator to perform spark on the discharge resistance from earth. The discharge time is controlled within 7 - 12s and the discharge current I and voltage at both terminals of the accumulator V1 are measured at the same time; (3) the discharge circuit is switched off for a 1 -2ms delay time, and the voltage at both terminals of the accumulator V2 are measured for the moment; and (4) the internal resistance of the accumulator is calculated. The method has the advantages of high measurement accuracy, and strong interference-free feature. The accumulator can be measured on line, the health status of the accumulator can be monitored and capacity of the accumulator can be estimated by the method.

The invention discloses a method and a device for detecting trace metal elements in a water body by using the laser-induced breakdown spectroscopy assisted by direct current discharging vaporization. High voltage direct current discharging is utilized to vaporize a liquid sample, the vaporized sample is separated through a separation device, gas is injected to a graphite bearing piece, the graphite bearing piece containing elements to be detected is subjected to pulse laser ablation induction to generate plasma and transmit spectroscopy signals, and finally a spectrograph is utilized to conduct detection analysis to measure the trace metal in the water body. By means of the method and the device, the pulse laser sample ablation efficiency is greatly improved, the detected spectroscopy signals are greatly strengthened, the detection sensitivity is improved, the detection limit of the metal elements is reduced, and the method is feasible for online high-efficiency quick detection of the metal elements in the water body.

The invention relates to a method for measuring trace impurity concentration of 7N electronic grade ultrapure ammonia. The method comprises the following steps of: separating trace impurities from the ultrapure ammonia by a pipeline system subjected to corrosion-resistant and adsorption-resistant treatment, by large-flow replacement, sweeping and sampling and a three-valve four-column cutting back-flushing gas channel system; and analyzing impurity gases by using a direct current discharging helium ionization detector (DID). The method has the advantages of capacity of providing a balanced (stable state) analysis value within short time, quantitative accuracy, low detection limit and short analysis period.

An ion generation method uses a direct current discharge ion source provided with an arc chamber formed of a high melting point material, and includes: generating ions by causing molecules of a source gas to collide with thermoelectrons in the arc chamber and producing plasma discharge; and causing radicals generated in generating ions to react with a liner provided to cover an inner wall of the arc chamber at least partially. The liner is formed of a material more reactive to radicals generated as the source gas is dissociated than the material of the arc chamber.

A combined electrostatic dust separator for removing the nanoparticles is composed of the first high-voltage DC discharging electric field connected to harmful fume pipeline for pre-collecting dust, the second high-voltage pulse discharging electric field for electrically charging the dust particles, and the third and fourth high-voltage DC discharging electric fields for coagulating and collecting dust.

The invention discloses an intelligent storage battery discharge energy-saving device for a constant-current multi-loop feedback power grid, which greatly reduces energy loss and meets the national energy saving and emission reduction policy by feeding the energy in a storage battery back to a power grid by utilizing an electric energy feedback control technology instead of a conventional heating-mode discharge method. The technical scheme is that: a device comprises a monitoring module, a direct current input loop, an alternating current output loop and a discharge feedback module, wherein the input end of the monitoring module is connected with a storage battery pack through a current detection line and calculates a practical discharge current according to a detected storage battery current; the direct current input loop comprises a direct current input switch; the input end of the direct current input switch is connected with the storage battery pack; the alternating current output loop comprises an alternating current output switch; the output end of the alternating current switch is connected with the power grid; the input end of the discharge feedback module is connected with the output end of the direct current input switch; the output end of the discharge feedback module is connected with the input end of the alternating current output switch; and the direct current discharged from a storage battery is converted into a sinusoidal alternating current by means of active inversion and is fed back to the power grid.

The invention discloses an additional reductant-free smoke denitration device and method for combustion equipment. Smoke generated by a boiler flows through a coal economizer; a discharging device is distributed in an inlet connecting flue of the coal economizer or a denitration reactor; the discharging device adopts pulse discharge or direct current discharge; discharge voltage is controlled between critical coronal voltage and breakdown voltage; a high-energy electron e generated by discharging attacks a carbon dioxide molecule so that the carbon dioxide molecule is activated from a normal state to an activating state; the carbon dioxide molecule in the activating state is dissociated into CO and an active substance; part of CO2 is converted for producing CO by reacting; the smoke enters a denitration reactor through the inlet connecting flue of the denitration reactor and a rectifying device; NO and CO in the smoke react under the action of a catalyst bed layer in the denitration reactor and generate nontoxic N2 and CO2; and the reacting smoke is exhausted through an outlet connecting flue of the denitration reactor. The invention can be used for smoke denitration of a coal burning boiler, a gas burning boiler, an oil burning boiler, a biomass boiler, and the like and has the advantages of convenience for operation and obvious benefit.

Provided are an oxide sintered body and a sputtering target which are suitable for use in producing an oxide semiconductor film for display devices and combine high electroconductivity with a high relative density and with which it is possible to form an oxide semiconductor film having a high carrier mobility. In particular, even when used in production by a direct-current sputtering method, the oxide sintered body and the sputtering target are less apt to generate nodules and have excellent direct-current discharge stability which renders long-term stable discharge possible. This oxide sintered body is an oxide sintered body obtained by mixing zinc oxide, tin oxide, and an oxide of at least one metal (M metal) selected from the group consisting of Al, Hf, Ni, Si, Ga, In, and Ta, and sintering the mixture, the oxide sintered body having a Vickers hardness of 400 Hv or higher.

The invention relates to an ultrapure phosphine analysis method and an apparatus thereof. The method comprises the following steps: 1, sampling: displacing ultrapure phosphine to a quantitative tube at a flow of 60-120mL / min under 0.05-0.15MPa in an isobaric sample introduction mode with high-flow blow displacement sampling, and ensuring the rapid detection of the impurity concentration change, and giving a balanced analysis value within a very short time; trace impurity separation: sending the above sampled sample gas for detection to a separating system at a flow of 20-50mL / min for the trace impurity separation; and 3, detection: inputting the separated trace impurities to a detector in order to obtain an analysis result. A corrosion and adsorption inhibition treatment highly-airtight pipeline system and a high-flow displacement blow, isobaric sample introduction and three-valve-three-column cutting reverse blow air passage system are used to separate the trace impurities in the ultrapure phosphine, and the direct current discharge helium ionization detector is used to analyze the impurity gas. The balanced analysis value can be given within a very short time, and is quantitative and accurate.

The present invention provides a vehicle power supply circuit and a semiconductor protecting control system of electronic equipment. The core element semiconductor shutdown relay SBR is composed of a P-channel MOS field effect tube, a control circuit SD07 and the like. The SD07 is composed of two circuits (excessive pressure and overflowing control) which have similar structures. Two SBR cooperation periphery elements can respectively form an accumulator semiconductor control device SCCB and an accumulator reverse semiconductor protecting device SPBR which are respectively used for vehicle accumulator charging additionally (lifetime prolonging) control and accumulator reverse protection control. The SBR can replace the conventional vehicle used fuse, breaker and / or electric relay, and can form a vehicle semiconductor control terminal box SCJB when combined with the SPBR to realize the control functions of circuit overvoltage, overload, short circuit, accumulator reversion, accumulator overdischarging and the like. The invention is simple, reliable and practical. The invention is suitable for the recycled vehicle improvement and new vehicle designing, and also can generalized to other direct current discharging electric power supply system.

The invention discloses a lithium battery SOH estimation method based on internal resistance detection. The lithium battery SOH estimation method is characterized in that the internal resistance of alithium battery is detected by a direct current discharge method, related health factor characteristic parameters are obtained, the characteristic parameters can effectively represent the change trendof a health state of the battery, a RBF neural network model of the health factor of the battery and the actual health state is established, the establishment of a complex equivalent circuit model isavoided, and the accuracy and the generalization of SOH estimation can be balanced.

The invention discloses a system and a method for testing an SOFC single battery. The test system comprises an electronic load, a test room, and a single battery sealing member, a Pt sheet and a Ni sheet current collection layer which are arranged in the test room, wherein the Pt sheet and the Ni sheet current collection layer are connected with the electronic load respectively through a first high-temperature resistant conducting wire, the single battery sealing member is connected with the electronic load through a second high-temperature resistant conducting wire, the test room is connected with ventilating pipes of a cathode inlet, a cathode outlet, an anode inlet and an anode outlet, an anode air flow channel of the single battery sealing member adopts a foam nickel air flow channel, and a cathode air flow channel adopts a platinum gauze wrapped LSM air flow channel. The system is characterized in that the platinum gauze wrapped LSM air flow channel is used as the cathode air flow channel of the single battery, the foam nickel air flow channel is used as the cathode air flow channel, and simultaneously a thick silver wire is used as a current lead wire, thus the system reduces the high-temperature contact resistance and the conducting wire resistance, is advantageous for performing direct current discharge test on the single battery, and reduces the voltage obtained in the discharge process of the single battery to less than 0.5 V.

The object of the present invention is to make a deodorizing device to efficiently remove an odorous component contained in a gas even in a closed space in which the gas is not circulated. This deodorizing device is constituted by providing a DC discharge mechanism 27, a photocatalyst module 28, and an ozonolysis catalyst filter 29 in a duct 26. The discharging mechanism 27 is constituted of a wire-like ignition electrode 30 and a pair of counter electrodes 31. The ignition electrode 30 is arranged by shifting the electrode 30 leftward from the lateral center line A of the counter electrodes 31. When a DC high-voltage potential is impressed upon the electrode 30, high-voltage discharge occurs between the electrodes 30 and 31 and an ion wind is generated, resulting in the generation of an air current flowing in the direction expressed by the arrow B in the duct 26. Consequently, the cold air in a refrigerator flows in the duct 26 from an inlet port 26a, is deodorized when the cold air passes through the photocatalyst module 28 and ozonolysis catalyst filter 29, and is discharged into the refrigerator from an outlet port 26b.

The invention provides an atmospheric pressure magnetic enhancement and magnetic confinement DC glow discharge ion source whose ionization efficiency, ion transport efficiency, and work stability are increased on a larger scale. The atmospheric pressure magnetic enhancement and magnetic confinement DC glow discharge ion source is provided at the periphery of a cavity in the axial direction, closer to an air outlet and in deviation from a direct current discharge electrode with a pair of rectangular permanent magnets which are separated by the cavity, arranged in parallel and opposite to each other. The magnetic field B1 covers a direct current discharge area; the direction of the magnetic field B1 is perpendicular to the current J across the direct current discharge area and the J X B1 is along the air flowing direction; along the axial direction of the cavity, two annular permanent magnets of the same specifications are coaxially and sequentially arranged so that the two annular permanent magnets could form a uniform-magnetic field B2 which covers the direct current discharge area and the plasma jet area of the air outlet downstream; the direction of the uniform-magnetic field B2 is consistent with the axial directions of the cavity and the annular permanent magnets.

There is disclosed a method for producing a substrate for single crystal diamond growth, comprising at least a step of preliminarily subjecting a substrate before single crystal diamond growth to a bias treatment for forming a diamond nucleus thereon by a direct-current discharge in which an electrode in a substrate side is a cathode, and wherein in the treatment, at least, a temperature of the substrate from 40 sec after an initiation of the bias treatment to an end of the bias treatment is held in a range of 800° C.±60° C. There can be provided a method for producing a substrate for single crystal diamond growth, by which a single crystal diamond can be grown more certainly.

The invention discloses a multifunctional ambient composite ion source and a using method thereof. The purpose of realizing one-time high-throughput mixture detection is realized in an ambient mass spectrometry. The composite ion source comprises a pin electrode, a pipe electrode, a conductive ring-shaped electrode, a double-layer capillary pipe and a pipe dielectric layer, wherein the pin electrode and the pipe electrode form an electrode pair to be inserted in the pipe dielectric layer for realizing DART (analysis in real time) and other DC discharge ion sources; the conductive ring-shaped electrode is wound on the outer surface of the pipe dielectric layer, and together with the pin electrode, forms another electrode pair for realizing DBDI (dielectric barrier discharge ionization) and other AC discharge ion sources; and the double-layer capillary pipe is inserted in the pipe dielectric layer and extends from the other end to form a DESI (desorption electrospray ionization) ion source. A laser source can be added as an auxiliary device for desorption. Influences of memory effects are eliminated, helium and other high-energy gases with high ionization efficiency can be used, multiple ionization modes can be used alone and can be used compositely, and the multifunctional ambient composite ion source and the using method have the advantage of high-throughput detection.

The invention belongs to the field of low-temperature heating of lithium ion batteries, particularly relates to a hybrid heating method, system and equipment for low-temperature direct-current discharge of a lithium ion battery, and aims to solve the problems. The method comprises the following steps: performing cyclic heating aging tests of different discharge voltage amplitudes of the lithium ion battery under set conditions; fitting test data to obtain a lithium ion battery aging model; calculating an optimal discharge voltage amplitude based on the current environment temperature, the set cycle index and the set lithium ion battery capacity loss; carrying out constant-voltage discharge on the lithium ion battery at the optimal discharge voltage amplitude, and starting heating; if the temperature does not reach the preset temperature, repeatedly carrying out optimal discharge voltage amplitude calculation and constant-voltage discharge, and continuously carrying out heating; and if the preset temperature is reached, stopping constant-voltage discharging, and stopping heating. Direct current heating and liquid circulation heating are combined, the energy utilization efficiency of the battery is improved, the heating efficiency is high, the speed is high, the energy consumption is low, the temperature uniformity is good, and the risk of damaging the cycle life of the battery is reduced.

Provided are an oxide sintered body and a sputtering target that are ideal for the production of an oxide semiconductor film for a display device. The oxide sintered body and sputtering target that are provided have both high conductivity and high relative density, are capable of forming an oxide semiconductor film having a high carrier mobility, and in particular, have excellent direct-current discharge stability in that long-term, stable discharge is possible, even when used by the direct-current sputtering method. The oxide sintered body of the invention is an oxide sintered body obtained by mixing and sintering zinc oxide, tin oxide, and an oxide of at least one metal (M metal) selected from the group consisting of Al, Hf, Ni, Si, Ga, In, and Ta. When the in-plane specific resistance and the specific resistance in the direction of depth are approximated by Gaussian distribution, the distribution coefficient σ of the specific resistance is 0.02 or less.

The present invention may be used in the production of highly efficient films for electron field emitters. The cold-emission cathode of the present invention comprises a substrate having a carbon film with an irregular structure applied thereon. This structure comprises carbon micro- and nano-ridges and / or micro- and nano-threads which are perpendicular to the surface of the substrate, which have a typical size of between 0.005 and 1 micron as well as a distribution density of between 0.1 and 100 mum-2, and which are coated with a diamond nano-film whose thickness represents a fraction of a micron. The method for producing the cathode involves sequentially depositing two carbon films. A carbon film with nano-barbs is first deposited on a substrate arranged on an anode by igniting a direct-current discharge at a density of between 0.15 and 0.5 A. This deposition is carried out in a mixture containing hydrogen and a carbon-containing additive, under a global pressure of between 50 and 300 torrs, using vapors of ethylic alcohol at a 5 to 15% concentration or vapors of methane at a 6 to 30% concentration, and at a temperature on the substrate of between 600 and 1100° C. A diamond nano-film is then deposited on the graphite film thus grown.

The invention discloses an energy storage power generation system of a wind power generator set and an energy dispatching method of the energy storage power generation system. The energy storage powergeneration system comprises an energy storage unit, a battery management unit, an energy storage bidirectional converter, a boost transformer and an energy management unit, wherein the energy storageunit is used for storing or releasing electric energy, the battery management unit is used for detecting and protecting a battery module in the energy storage unit, the energy storage bidirectional converter is used for converting an alternating current of a power grid to a direct current so as to charge a battery or converting the direct current discharged from the battery to the alternating current sent back to the power grid, the boost transformer is used for connecting the energy storage bidirectional converter and the power grid and rising an output voltage of the energy storage bidirectional converter to a power grid voltage, and the energy management unit is used for sending a control signal to the energy storage bidirectional converter and a master controller of the wind power generator set to do real-time control according to real-time data of the master controller of the wind power generator set, the energy storage unit, the energy storage bidirectional converter and a powergrid dispatching instruction and wind power forecast information of a power forecast system. By the energy storage power generation system, the optimal charge-discharge rate of the energy storage system can be made, the utilization efficiency of the energy storage system is improved, and moreover, the energy storage system is high in control efficiency and rapid in response speed.

The present invention relates to a method for on-line detection of the internal resistance of a storage battery by performing low-direct-current discharge twice. The low current discharge is performed twice on the storage battery in a load state, and two discharge loops are composed of switches and two precision resistors having different resistances. The on-line detection method is provided based on the direct current high current discharge method, a sampling holder is employed in the process of the voltage acquisition to perform sampling holding of voltages acquired in the two-time discharge, then a required voltage difference in the two-time discharge is obtained through differential amplification, and the internal resistance of the storage battery is calculated according to the voltage difference in the two-time sampling. According to the on-line detection method provided by the invention, the problems of the damage of a high current discharge method to a storage battery and the defect of an inappropriate on-line detection may be overcome, voltage difference in the two-time discharge obtained through sampling holding and differential amplification may improve the precision of data acquisition, and the error is reduced, therefore, the exact value of the internal resistance of the storage battery is obtained and the accurate detection of the internal resistance of the storage battery in the load state is realized online.

The invention discloses an online active inverter discharging system for a transformer substation storage battery. The online active inverter discharging system comprises an alternating current busbar, an active inverter circuit, a charging circuit, a discharging control circuit and the transformer substation storage battery. The active inverter circuit and the charging circuit are connected with the alternating current busbar. The discharging control circuit is connected with the charging circuit. The transformer substation storage battery is respectively connected with the active inverter circuit, the charging circuit and the discharging control circuit. According to the online active inverter discharging system, the discharging process is safe and friendly to the environment, energy is saved in the discharging process, the storage battery does not need to disengage from a bus in the discharging process, the direct current discharged by the storage battery is inverted into an alternating current feedback power grid with the same frequency and the same phase with the electric supply, discharging is immediately stopped when electric supply failure or charging device fault and other abnormal situations in the discharging process of the storage battery happen, and the bus is supplied with the electricity.

The invention discloses plasma omnibearing ion deposition equipment which comprises a vacuum plating chamber, an air extracting system, a man-machine control system and an inflation system, wherein the vacuum plating chamber is internally provided with a support for supporting a to-be-plated workpiece. The plasma omnibearing ion deposition equipment is characterized in that the equipment is further provided with a plasma enhancing device and a DLC (diamond like carbon) coating doping device, wherein the enhancing device consists of a metal wire in the vacuum plating chamber, an auto-transformer, an isolation transformer and a direct current discharge power supply, and the DLC coating doping device consists of an external air source input device and an internal metal vapor source high-frequency induction heating device. According to the equipment disclosed by the invention, in the plating process, due to the improvement of density of plasma, more ions with positive charges are deposited on the surface of the workpiece, and thus the plating rate is improved. Moreover, due to a great amount of ions perform bombardment, the consistency and bonding force of the DLC are improved. In addition, internal stress of the DLC coating can be significantly reduced after the doping of metal elements.

The invention provides a device and a method for preparing high-nitrogen steel powder through plasma arc melting, and belongs to the field of plasma arc melting and powdering. According to the deviceprovided by the invention, a heat-conducting base is placed on the bottom part of a plasma furnace; a graphite crucible is arranged on the top part of the heat-conducting base; a plasma arc assembly is arranged on the perpendicular direction of the graphite crucible, and comprises a water-cooling anode and a tungsten electrode; a nitrogen conduit is arranged on the outer side of the tungsten electrode; and the tungsten electrode is located vertically above the graphite crucible. According to the device and the method for preparing the high-nitrogen steel powder through plasma arc melting provided by the invention, the tungsten electrode ionizes inert gases by direct-current discharge to produce a high-temperature plasma, so that a metal raw material is molten and evaporated; and fed nitrogen is ionized to decompose nitrogen ions with higher diffusion rate, the nitrogen absorption rate constant under plasma arc action is up to 10-2m / s, and the nitrogen ions can be fully dispersed in molten steel and can be acted above the molten steel for a long time so as to have enough time to form a supersaturated nitrogenous metal solution, so that the homogeneity of nitrogen elements is furtherimproved.

The invention discloses an electronic automatic internal ignition device of a cutting torch. The electronic automatic internal ignition device of the cutting torch comprises a cutting torch body, a cutting nozzle and a direct current discharge device arranged on the cutting torch body. The cutting nozzle comprises a nozzle core and a nozzle cap sleeving the nozzle core. The nozzle core comprises a nozzle cap connecting threaded port, an insulator and an oxygen outlet nozzle which are connected in sequence. One electrode of the direct current discharge device is electrically connected with the oxygen outlet nozzle, the other electrode of the direct current discharge device is electrically connected with the nozzle cap, and electric sparks can be generated between the nozzle cap and the oxygen outlet nozzle. By arranging the insulator, insulation between the oxygen outlet nozzle and the cutting torch body is achieved, and the insulator serves as one electrode of the direct current discharge device. The nozzle cap serves as the other electrode of the direct current discharge device, discharge between the oxygen outlet nozzle and the nozzle cap is achieved, and electric sparks are generated for ignition. Through the ignition mode, burning injuries to an operator can be avoided, and ignition can be conducted smoothly under the condition of outdoor strong wind.

The invention discloses a high-voltage discharge experiment box comprising a box body, a DC discharge experiment area used for carrying out a high-voltage DC related discharge experiment under the control of a DC high-voltage experiment starting switch, and an AC discharge experiment area used for carrying out a high-voltage AC related discharge experiment under the control of an AC high-voltage experiment starting switch, wherein a DC flexible transfer switch is arranged in a DC discharge experiment area, and an AC flexible transfer switch is arranged in an AC discharge experiment area so that AC and DC high voltage can be transferred to different discharge circuits, and a plurality of high-voltage insulation experiments, such as DC arc, man-made lighting, AC space, creeping discharge, and the like and various high-voltage insulation experiments, can be carried out in one experiment box. The invention has the advantages of low cost, strong functions, rich experiments, obvious experiment phenomena, simple use and relative safety, and provides equipment basis for researching theory and phenomena of high-voltage discharge.