457 results about "Electrode potential" patented technology

The invention relates to the technical field of integrated circuit manufacturing, in particular to a precise electroplating control system and method for an electroplated layer of a double-layer circuit board, and the method comprises the steps: building a multi-physical field coupling simulation model, and simulating the internal current density and ion concentration distribution of a via hole; constructing a mapping relation between the current density and the side wall electroplating thickness based on a simulation result, and predicting the electroplating thickness; through thickness prediction feedback, a time sequence adjustable pulse current control strategy is designed, the pulse amplitude, the duty ratio and the on-off period are dynamically adjusted, and current distribution optimization is guided; the state of the electroplating process is sensed in combination with real-time monitoring and analysis of multi-source parameters of electrode potential, conductivity and fluid velocity; and based on the prediction model and the real-time parameters, adjusting the pulse waveform and the time sequence through closed-loop compensation. According to the method, the uniformity and controllability of the thickness of the electroplated layer on the side wall of the via hole can be remarkably improved.

An intelligent battery management system and method, and in particular a battery management system utilizing a method for the estimation of the instantaneous positive and negative electrode potentials used during a battery charging / discharging process. The intelligent battery management system and method may be used in a battery control system, such as a battery charging / discharging system to preserve the health of a connected battery over multiple cycles, or in a battery diagnostic system for predicting or modelling battery performance. During a battery charging / discharging process, one or more set points may be set for the electrode potentials on the negative and or positive electrodes. Using the battery overpotential in the determination of electrode potential, allows the battery management method and system to exhibit a high level of adaptivity to battery ageing and battery degradation.

The invention provides a battery heating control method and device, equipment, a storage medium and a program product, and relates to the technical field of battery heating. The method comprises the steps that when the vehicle meets the pulse heating condition, the saturation current of a motor for adjusting the battery temperature is determined based on the maximum negative electrode potential of a battery cell in a battery; determining the maximum pulse heating current of the motor based on the maximum current and the saturation current borne by the bus of the motor; and performing pulse heating on the battery based on the maximum pulse heating current. By considering the influence of the cathode potential, the cathode potential of the battery cell is kept in a safe range in the pulse heating process, and the risk of lithium precipitation of the battery cell is effectively reduced, so that the safety of the battery is improved, and the service life of the battery is prolonged; besides, the saturation current of the motor is determined based on the maximum cathode potential, and the maximum pulse heating current of the motor is further determined, so that the heating rate of the battery can be maximized on the premise of ensuring the safety of the battery, and the performance of the battery in a low-temperature environment is improved.

The invention provides an electrochemical active oxygen supply device for a washing machine and a preparation method. The device comprises a shell, a single closed reaction chamber is formed in the shell, a bifunctional anode electrode and a bifunctional cathode electrode are integrated in the reaction chamber, and a compact and uniform reaction area is formed between the anode electrode and the cathode electrode. When water flows through the reaction area, hydrogen peroxide (H2O2) and / or hydroxyl radicals (OH) are / is electrochemically generated on the surface in situ by accurately adjusting the electrode potential of the difunctional anode, so that instant generation and instant utilization of active oxygen are realized. The active oxygen directly enters a washing system of the washing machine along with water flow, bacteria, viruses and fungi can be efficiently inactivated under the normal-temperature or low-temperature washing condition without additionally adding chemical disinfectants, organic stains and peculiar smell molecules are synchronously degraded, and green, efficient and intelligent healthy washing is achieved.

A computer-implemented method comprises obtaining (202) a plurality of open circuit voltage curves of a battery (150) at a plurality of predefined charge cycles of the battery. Each of the open circuit voltage curves is indicative of an open circuit voltage over a predetermined charge range of the corresponding charge cycle. The method further comprises fitting (204) parameters of a model of the battery based on the plurality of open circuit voltage curves. The parameters include electrode parameters that model a corresponding open circuit electrode potential for each electrode of the battery.

The invention belongs to the field of electrochemistry, and particularly relates to a method for electrochemical lithium extraction of a decommissioned lithium battery assisted by a pseudocapacitor cathode, which comprises the following steps: a) providing an anode electrode and a cathode electrode; the anode electrode is an anode electrode made of a recycled retired lithium battery anode material or an retired lithium battery anode plate; the cathode electrode contains a Prussian blue analogue, the Prussian blue analogue is prepared by mixing citrate, transition metal salt and cyanide in water for reaction, and the transition metal salt is one or more of cobalt salt, ferric salt, copper salt and nickel salt; and b) immersing the anode electrode and the cathode electrode into the electrolyte, and electrifying to carry out electrochemical lithium extraction. According to the method, a pseudocapacitance material with a lithium discharging characteristic is adopted as a cathode to replace a common metal pole plate or a carbon material, a pseudocapacitance reaction with a corrected electrode potential is adopted to replace a hydrogen evolution reaction on the cathode of an existing system, and finally, low-energy-consumption and high-selectivity recovery of lithium is realized.

The invention provides a lithium iron phosphate battery fast charging strategy optimization method and system based on reinforcement learning, and belongs to the technical field of battery management. Three-factor characteristics and capacity attenuation characteristics are extracted, gating fusion characteristics are generated in combination with potential sensitive characteristics, and a potential boundary constraint activation function is designed to calculate a cathode potential estimation value, so that an estimation range of the aged battery is automatically tightened; meanwhile, negative electrode potential characteristics are extracted through a negative electrode potential estimation sequence, and aging state characteristics are generated in combination with the capacity fading rate; under a reinforcement learning framework, taking aging state characteristics as condition input of a strategy network, designing a comprehensive reward function including a charging efficiency reward function and a lithium precipitation risk penalty function, and realizing multi-objective optimization; and the finally generated charging current curve can be dynamically adjusted according to the actual aging state of the battery and the real-time charging parameters, so that the charging speed of the new battery is prevented from being limited, and the lithium precipitation risk of the aged battery is effectively prevented.

The invention relates to a construction method and system of a chemical plating solution preparation model based on RNAS, and belongs to the technical field of artificial intelligence control and chemical plating reduction fusion. The method comprises the following steps: acquiring formula data of a chemical plating solution to be prepared; obtaining a size data set of a plating layer area of a to-be-processed plating piece and electrode potential data of oxidation reduction strength of to-be-chemically plated metal, and calculating the modeling film thickness of the plating piece; actual chemical plating operation is carried out, and the actually measured film thickness of a plated part is measured; the plating piece modeling film thickness and the plating piece actual measurement film thickness which meet the preset relation are used for training of an RNAS model system so as to classify chemical plating solution formula data; according to the method, the formula data of the chemical plating solution is classified into an available formula or an unavailable formula by constructing the RNAS model, the use quantity of a reducing agent in the preparation of the chemical plating solution is strictly managed according to the standard, and the effect of accurately and rapidly screening the formula data of the chemical plating solution is achieved.

The invention relates to the technical field of flow batteries, in particular to a bromine-chromium flow battery electrolyte and a flow battery. The electrolyte is composed of a basic electrolyte and an additive; the additive is an iodine elementary substance or an iodine-containing compound; the basic electrolyte comprises bromide ions, chromium ions and hydrogen ions; the molar concentration ratio of iodine to bromide ions in the electrolyte is (1: 8)-(1: 4), one or two of iodine elementary substances or iodide ions are used as additives, the bromide ions and the iodine elementary substances are complexed in the charging process to form I2nBr <-> to exist in the electrolyte, then the I2nBr <-> generates the bromine elementary substances through an electrochemical reaction, and the electrochemical reaction electrode potential (Egt) of I2nBr <->-Br2; the electrode potential (E = 1.0873 V vs.SHE) is higher than the electrode potential (E = 1.0873 V vs.SHE) of Br <->-> Br2, so that the energy density of the bromine-chromium flow battery is improved.

The invention discloses a method for testing the cycle performance of a hard carbon negative electrode material and application, and belongs to the technical field of sodium-ion batteries. The method for testing the cycle performance of the hard carbon negative electrode material comprises the following steps: S1, preparing a to-be-tested hard carbon material into a negative electrode plate, laminating a positive electrode plate, a diaphragm, the negative electrode plate and a reference electrode, and injecting an electrolyte to prepare a three-electrode battery; s2, discharging the three-electrode battery to a cut-off voltage at a current of 0.5-1 C, and then discharging the three-electrode battery to the cut-off voltage at a current of 0.01-0.1 C; and S3, charging the three-electrode battery, and recording the minimum potential value of the negative electrode relative to the reference electrode and the SOC of the corresponding battery when the potential of the negative electrode is zero. According to the test method provided by the invention, the three-electrode battery is used for testing, the reference electrode is introduced to monitor the real potential of the negative electrode in the charging process of the battery, and the cycle performance of the hard carbon negative electrode material is judged according to the lowest potential of the negative electrode, so that the test period is shortened, and the research and development time of the sodium ion battery is saved.

According to the current-limiting circuit and the linear voltage regulator for achieving constant power control, after the current of a power tube Ppower tube of a mirror image LDO circuit of a detection tube is compared with a set current-limiting threshold, an output signal pulls up the grid electrode of the Ppower tube to reduce output current, so that output current-limiting control is achieved, and when Vin rises, the output current-limiting control is achieved through the channel length modulation effect of the detection tube and the power tube. And the rated current limiting value is reduced, so that constant power control is realized when the input and output voltage difference of the LDO circuit is increased. Meanwhile, in order to avoid the influence of different Vout on the current limiting value, a Vout clamping circuit is adopted, the drain electrode potential of the Ppower and the drain electrode potential of the detection tube are approximately the same, and the current limiting difference caused by the change of the Vout is avoided. According to the circuit, current limiting and channel length effect differences are combined, as Vin rises, the current rising proportion of the detection tube is larger than that of the power tube, current limiting protection is started in advance, the output current is reduced, the constant power effect is achieved, power rising of the power tube along with Vin rising is avoided, and risks caused by heating when the power is large are reduced.

A battery system includes a non-reference battery cell; a reference battery cell including a cathode, an anode, and a reference electrode; a potential measuring means configured to measure a reference potential of the anode relative to the reference electrode, of the reference battery cell, and to generate a signal corresponding to the reference potential; and a controlling means configured to receive the signal and to reduce, during a charging process of the battery system, a charging current applied to the battery system when the signal indicates that the reference potential is below a predetermined threshold voltage. The non-reference battery cell may be disposed at a first position in the battery system, and the reference battery cell may be disposed at a second position in the battery system, the second position being a position that has a lowest temperature, among the first and second positions, during the charging process.

To provide a component for a man-powered drive vehicle and a gear that are able to suppress a reduction in life.SOLUTION: A component for a man-powered drive vehicle includes a housing, and a mounting portion provided on the housing and configured to be attached to a support portion of the man-powered drive vehicle by a fastener; wherein the mounting portion includes: a metal base portion; metal coupling portion provided on the base portion and configured to be coupled to the fastener; and an intermediate portion provided between the coupling portion and the base portion; wherein the base portion includes a first material having a first standard electrode potential; wherein the coupling portion includes a second material having a second standard electrode potential; and wherein the intermediate portion has a third standard electrode potential and is formed of a third material in which a difference between the third standard electrode potential and the first standard electrode potential and the difference between the third standard electrode potential and the second standard electrode potential are each smaller than a difference between the first standard electrode potential and the second standard electrode potential or formed of a fourth material having an electric insulating property.SELECTED DRAWING: Figure 7

The invention belongs to the technical field of battery preparation, and particularly relates to a secondary battery and electric equipment. The secondary battery comprises a negative pole piece, wherein the negative pole piece comprises a negative current collector and a negative active material layer arranged on at least one surface of the negative current collector; the negative active material layer comprises a main body region and a thinned region arranged at the edge of the main body region, and the thickness of the thinned region is smaller than that of the main body region; the negative pole piece further comprises an ionic conductive composite material, the ionic conductive composite material makes contact with the thinned area, and the ionic conductive composite material comprises ionic liquid and at least one of a conductive polymer and a sodium ion manganese-based layered oxide. According to the invention, the ionic conductive composite material is added into the negative electrode plate and is in contact with the thinned region, so that the effect of protecting the electrode plate is achieved, the sodium ion conductivity and capacity of the thinned region can be improved, polarization and negative electrode side potential drop in the circulation process can be slowed down, sodium precipitation and side reaction are inhibited, the loss of active sodium is reduced, and the service life of the battery is prolonged.

The invention relates to a water-soluble plumbic acid static storage battery. The battery comprises a battery monomer, the battery monomer comprises an electrode plate, a static electrolyte and a container, the electrode plate is inserted in the electrolyte, the electrolyte comprises water-soluble lead salt, acid and water, and the battery monomer further comprises a lead dissolving agent or a structure extending the bottom end of a negative plate to the position below a positive plate. The lead dissolving agent can provide at least one water-soluble redox couple R oxidation and R reduction, and the redox couple electrode potential meets E theta (Pb < 2 + > / Pb) lt; e [theta] (R oxidation / R reduction) [lt]; e theta (PbO2 / Pb2 +). No diaphragm exists, the electrolyte is in a static state, facilities such as a circulating pump are not needed, lead ions are allowed to migrate under the concentration gradient effect, and meanwhile self-discharge caused by convection shuttling of the lead dissolving agent is greatly reduced. In the charging process, lead and lead dioxide can be flatly deposited on the surface of an electrode and can be completely dissolved in the discharging process, the cycling stability is good, and the components can be kept stable for a long time.

The invention relates to a metal contact corrosion evaluation method and system based on a Tafel polarization curve, and the method comprises the steps: installing a to-be-evaluated sample in an electrochemical testing device, and simulating the corrosion condition of a working environment; carrying out linear polarization scanning on the to-be-evaluated sample by adopting an electrochemical workstation, recording changes of electrode potential and current density, and generating a Tafel polarization curve; a strong polarization interval is selected according to the measured Tafel polarization curve data, and Tafel curves of the anode and the cathode are obtained through mathematical fitting; and calculating the corrosion potential and the corrosion current density based on the Tafel curves of the anode and the cathode obtained by fitting. Compared with the prior art, through accurate mathematical fitting and calculation, the accuracy and reliability of corrosion parameters are ensured, and the corrosion tendency and corrosion rate of the metal material can be accurately evaluated. And an effective technical means is provided for evaluating the corrosion performance of the metal material.

The invention belongs to the technical field of rechargeable batteries, and particularly relates to a reference electrode and long-life three-electrode battery preparation and battery capacity recovery method. The invention provides a method for preparing, processing and applying a sheet reference electrode, which can realize large-scale mass production, stably monitor the potential information of the positive electrode and the negative electrode in the battery in the long-term service process of the battery, prolong the cycle life of the battery, and supplement additional active lithium / sodium after judging that the battery is aged so as to recover the capacity of the battery. Therefore, the method can directly obtain the internal information of the battery and improve the cycle performance of the battery, and provides a solution for the development and commercial application of a novel battery management system and a battery cell.

The invention provides a method for preferentially stripping a gold-plated layer of a waste circuit board based on a controlled potential erosion method, which comprises the following steps of: placing the waste circuit board in a solution, and carrying out erosion reaction under ultrasonic reinforcement to obtain a crude gold foil, a solution containing copper and nickel and a degolded substrate; based on the electrode potential difference of the noble metal layer and the base metal layer in the same medium system, the gold-plated layer on the waste circuit board is efficiently cleaned and extracted by utilizing the gain of ultrasonic waves on physical and chemical levels.

The invention relates to a charging type moisture power generation device based on a double-layer polymer film and a preparation method thereof, and belongs to the technical field of moisture power generation. Comprising an active electrode, double-layer polymer films and an inert porous electrode which are sequentially arranged, the first polymer film of the double-layer polymer films is a mixture of ferric hydroxide, polystyrolsulfon acid and polyvinyl alcohol, the second polymer film of the double-layer polymer films is poly (diallyldimethylammonium chloride), the first polymer film is in contact with the active electrode, and the second polymer film is in contact with the inert porous electrode. The second layer of polymer film is in contact with the inert porous electrode; the active electrode is made of metal with the standard electrode potential ranging from-1 V to + 0.5 V, and the inert porous electrode is made of metal with the standard electrode potential larger than + 1 V. Through moisture evaporation and an oxidation-reduction reaction, the battery can generate electricity by itself in a moisture environment, and can be self-repaired through the oxidation-reduction reaction when the performance is reduced, so that a charging effect is achieved.

The invention discloses a rapid, stable and high-sensitivity underwater electric field signal detection device and a test method, and solves the problems that an electrode of an existing measurement device needs a long time to stabilize potential, rapid stabilization and real-time detection are difficult, and a test electrode has range difference and drifting. The device comprises a front-end electric field signal sensitive electrode, a rapid stabilization circuit, a signal processing circuit and an upper computer, and the testing method comprises the steps that fixed voltage is applied to the front-end electric field signal sensitive electrode, the state of a single-pole switch of the rapid stabilization circuit is controlled, the electrode range is actively stabilized, and baseline fluctuation of current response is reduced. According to the detection device and the test method, the stabilization speed of the sensing electrode can be optimized through the rapid stabilization circuit, and the electrode current signal is processed in real time and transmitted to the upper computer for display, so that rapid deployment of the sensing electrode is realized, and the efficiency of underwater electric field signal detection is improved.

The invention discloses a PH electrode intelligent calibration method and system based on a self-adaptive calibration algorithm, and relates to the technical field of intelligent calibration control, and the method comprises the steps: carrying out the preprocessing of an original potential signal of an electrode, and obtaining a standardized potential; constructing a two-channel Gaussian process model, and outputting a calibrated pH value and uncertainty in real time; inputting a reinforcement learning decision network, automatically selecting an execution action according to a comprehensive reward function of a prediction error and resource consumption, and obtaining a new sample increment; and the new sample increment is updated to the Gaussian process and reinforcement learning model, and data-driven closed-loop adaptive calibration is completed. According to the method, the calibration pH value and the uncertainty thereof are output in real time through the two-channel Gaussian process model, and automatic balance is performed between prediction errors and resource consumption in combination with the reinforcement learning decision network, so that lag and waste of fixed period calibration are avoided, reagent, energy consumption and manual maintenance cost are remarkably reduced, and the overall operation efficiency of the system is improved.

The invention provides a charging control method and device for a power battery without lithium precipitation and a vehicle, and the charging control method comprises the steps: correspondingly obtaining a battery parameter according to a to-be-estimated parameter in an equivalent circuit model based on the equivalent circuit model corresponding to the target power battery when the target power battery is charged; updating the battery parameters by using the parameter identification network model to quantify the aging characteristics of the target power battery to obtain target battery parameters corresponding to the battery parameters; and based on the target battery parameters, determining a state-of-charge estimated value and a polarization voltage predicted value of the target power battery, performing rolling optimization by using the prediction model, and determining a terminal voltage predicted value of the target power battery so as to control the cathode potential of the target power battery, so that the target power battery has no lithium precipitation phenomenon in the charging process. By means of the method, the effectiveness and safety of lithium precipitation-free charging control of the power battery are improved, and then the cost of charging control is reduced.

The invention discloses a secondary battery charging method based on SOC optimization, and belongs to the technical field of secondary battery charging, and the method comprises the steps: collecting and preprocessing battery pack data, determining historical charging and discharging state marks, and extracting a dynamic polarization time constant and dynamic polarization resistance; superposing a lag correction compensation amount on a preset open-circuit voltage-state-of-charge mapping curve, and determining an initial state of charge; outputting a real-time charge state by using an extended Kalman filtering algorithm model; a recursive least square method with a forgetting factor is adopted to update the capacity reference of the real-time charge state, and a corrected charge state is obtained; calculating a negative electrode surface potential estimation value through a negative electrode potential estimation model based on a single-particle model architecture; and judging to output a maximum allowable charging current instruction and a current limit value dynamic adjusting instruction. According to the method, SOC estimation is accurately optimized, battery aging is adapted, the lithium precipitation risk is evaluated in a mechanism level, dynamic adjustment of the charging current is achieved, and the charging efficiency and the cycle life of the secondary battery are both considered.

The invention relates to the technical field of power battery management, regulation and control, in particular to a battery system full-life-cycle optimal fast charge control method which comprises a frequency-band-divided cooperative control framework of high-frequency fast charge optimization, intermediate-frequency lithium precipitation detection and low-frequency parameter updating. According to the full-life-cycle optimal fast charge control method for the battery system, the battery system model is constructed to consider the inconsistency of parameters among the single cells, so that the situation that individual cells with parameter deviations reach the boundary in the charging process is avoided, and behaviors such as lithium precipitation and thermal runaway are prevented from being carried out to carry out health state estimation and model parameter (capacity and internal resistance) updating after the battery is aged; the problem that an aged battery system does not adapt to an original charging strategy can be avoided in time, online multi-target lossless optimal fast charging is achieved in a charging period, meanwhile, threshold constraints of internal negative electrode potential and external temperature are considered, other key side reaction problems such as lithium precipitation are avoided, and the service life of the battery system is prolonged. And the current is dynamically optimized by combining a closed-loop observer and an optimizer.

The invention relates to the technical field of fine chemical engineering, and discloses a fuel cell cooling liquid and a preparation method thereof, and the preparation method comprises the following steps: preparation of a basic liquid, construction of a corrosion inhibition system, ion inhibition treatment, addition of a functional auxiliary agent and post-treatment. According to the composite corrosion inhibitor, zinc ions are anchored to gap sites of a silicate framework through the surface loading effect of sodium silicate and nano-zinc oxide under the shear dispersion condition, a compact composite passivation film is formed on the surface of a metal pipeline, and an electrode potential active area is covered; meanwhile, molybdate ions are subjected to a self-repairing reaction at the defect position of a passivation film preferentially by virtue of the oxidation-reduction characteristic of the molybdate ions, and formation of a galvanic corrosion microbattery is blocked by dynamically filling microcracks, so that the integrity of a corrosion inhibition system is improved; all the components of the composite corrosion inhibitor generate a synergistic effect in a specific proportion, so that the cooling liquid can maintain stable corrosion resistance for a long time.

A computer-implemented method comprises obtaining (202) a plurality of open circuit voltage curves of a battery (150) at a plurality of predefined charge cycles of the battery. Each of the open circuit voltage curves is indicative of an open circuit voltage over a predetermined charge range of the corresponding charge cycle. The method further comprises fitting (204) parameters of a model of the battery based on the plurality of open circuit voltage curves. The parameters include electrode parameters that model a corresponding open circuit electrode potential for each electrode of the battery.

The invention relates to the technical field of new energy, in particular to a reference electrode, a three-electrode battery and a preparation method of the three-electrode battery. The reference electrode comprises a porous conductive substrate and a first attachment, and the first attachment is located in pores of the porous conductive substrate; the porous conductive substrate meets at least one of the following conditions 1)-2): 1) the density of the porous conductive substrate is rho0, the density of a solid conductive substrate made of the same material as the porous conductive substrate is rho1, and rho0 meets the condition that rho0 is greater than or equal to rho1 * 0.7; and 2) the specific surface area of the porous conductive substrate is S0, the specific surface area of the solid conductive substrate with the same shape as the porous conductive substrate is S1, and S0 is greater than or equal to S1 * 5. The reference electrode can stably monitor the positive and negative electrode potentials of the lithium ion battery so as to evaluate the positive and negative electrode performance of the battery, and is long in service life.

The invention belongs to the technical field of photoelectrochemical interface kinetics, and discloses a method for in-situ determination of interface charge transfer kinetics, which comprises the following steps: (1) constructing a photoelectrochemical reaction solution, and forming a solid-liquid interface; (2) obtaining a current approximation curve of the current changing along with the position of the probe; (3) applying vertically incident light to the solid-liquid interface, and applying different potentials to the second working electrode to obtain at least five current feedback approximation curves of current changing along with the position of the probe under different second working electrode potential settings; and (4) obtaining a change relationship between different second working electrode potentials and heterogeneous effective charge transfer rate constants obtained by fitting, and thus obtaining a photon-generated carrier exchange rate constant at a solid-liquid interface. According to the invention, quantitative acquisition of solid / liquid interface reaction kinetics information can be conveniently realized, and interface charge transfer kinetics mechanism research in photoelectrocatalysis and optimization of process properties of related devices can be promoted.

The invention belongs to the technical field of steel plate pickling, and relates to a method for carrying out pretreatment and pickling end point judgment on hot-rolled strip steel in hydrochloric acid. The method specifically comprises the following steps: taking a to-be-used hydrochloric acid liquid for testing, heating the hydrochloric acid liquid, adding a wetting reagent A and a potential stabilizing reagent B, and putting a to-be-measured hot-rolled strip steel into the hydrochloric acid liquid; and measuring the pickling process of the hot-rolled strip steel by adopting a dual-electrode detection system and a constant potential rectifier, synchronously recording electrode potential values in different time periods in the process, and taking a time point when a potential first-order derivative value is basically unchanged as the pickling end point time of the hot-rolled strip steel. According to the method, the implementation process is simple, only certain manpower needs to be input for manual operation, and analysis instruments related to related work are mature; the method can effectively measure the pickling end point of the hot-rolled strip steel, especially the ultra-high-strength hot-rolled steel plate in the acid liquor, eliminates the effects of various influence factors in pickling, and has extremely high practical application value.

The invention discloses a method and device for preparing metallic iron and oxygen through electro-deposition of lunar soil in a three-electrode fused salt system, and belongs to the technical field of metallurgy. The device comprises a threaded pipe sealing structure, a gas inlet and outlet structure, a reaction cavity, a crucible, a reaction cavity sealing cover and a three-electrode potential control system. The method comprises the following steps: adding chloride molten salt, a cosolvent and lunar soil / simulated lunar soil into a crucible; raising the temperature to a drying temperature in a simulated moon atmosphere, and keeping the temperature to remove moisture; continuously raising the temperature to the electro-deposition temperature, so that iron-containing components in the lunar soil / simulated lunar soil are fully dissolved; a three-electrode system is adopted for electro-deposition, high-purity metal iron is obtained at a working electrode, and oxygen is efficiently separated out at an auxiliary electrode. The reduction potential is accurately regulated and controlled through a three-electrode system, and synchronous and efficient separation of metal iron and oxygen in lunar soil / simulated lunar soil is achieved.