1227 results about "Cell voltage" patented technology

The invention relates to the technical field of electrical variable measurement, in particular to a control system and a control method of a battery measuring instrument. The method comprises the following steps: acquiring single voltage, total voltage, current and internal resistance data of a battery pack to obtain initial electrical parameters; collecting the surface temperature of the battery pack to obtain an initial thermodynamic parameter; performing synchronous time sequence integration on the initial electrical parameters and the initial thermodynamic parameters, and unifying formats to obtain a battery running state monitoring data set; and performing dynamic threshold determination and trend analysis on each parameter based on the battery operation monitoring data set to obtain an abnormal state identification result. By constructing a complete intelligent monitoring system covering data acquisition, processing, abnormity identification, state evaluation, communication packaging and visualization, high-precision real-time monitoring, fault pre-judgment and remote communication of the running state of the battery are realized, and the synchronism, the accuracy and the adaptability of the system and the intelligence and the practicability of field application are remarkably improved.

A power battery voltage fault online diagnosis processing method based on an entropy algorithm, comprising: acquiring a voltage time series value of each cell of a power battery to be diagnosed of an electric vehicle to establish a voltage data matrix (S100); on the basis of a sliding window preset with a constant length, sliding downwards across a voltage matrix, and on the basis of a data processing principle, evicting and reconstructing data within the sliding window each time (S102); then calculating a voltage entropy value of each cell, performing Z-score conversion on the calculation results to obtain anomaly assessment coefficients, and performing outlier identification on the coefficients (S105); if there is an outlier, locating the number and time of an abnormal cell, assessing the degree of abnormality, and transmitting a corresponding prompt to a driver on the basis of a safety management strategy at the same time (S107); and if there is no outlier, a time window continuing to slide downwards, and repeating the described processes to perform iterative calculation (S108). The method can accurately locate the occurrence time and location of cell voltage faults, thereby improving the safety of electric vehicles to a certain extent.

The invention discloses an energy storage liquid cooling unit control strategy generation method and device based on working condition prediction, equipment and a storage medium, and relates to the technical field of power grids, and the method comprises the steps: building a prediction model based on working condition data of an energy storage system, determining initial prediction power and predicted battery electric quantity based on a preset coefficient and the working condition data, the prediction model is used for correcting the initial prediction power to obtain target prediction power, the predicted heating power of the battery cell is determined based on the equivalent internal resistance of the battery cell and the voltage of the battery cell, the operation parameters of the liquid cooling unit are fitted based on a preset calibration coefficient to obtain the expected refrigerating capacity, and the predicted temperature of the battery cell is determined; adjusting the initial strategy by using the liquid cooling unit control rule and based on the temperature deviation degree and the temperature change rate to obtain a target energy storage liquid cooling unit control strategy so as to control the energy storage liquid cooling unit; the temperature deviation degree and the temperature change rate are data determined based on the preset battery working temperature range and the battery cell predicted temperature, so that the efficiency of generating the energy storage liquid cooling unit control strategy is improved.

The invention relates to a battery equalization method and device, electronic equipment and a storage medium. The method comprises the following steps: after a battery pack reaches a charging tail end, acquiring battery cell temperatures of battery cells in the battery pack, battery cell voltages at a plurality of acquisition moments and charge states of reference battery cells in the plurality of battery cells at the acquisition moments; fitting processing is carried out according to the cell temperature of each cell and the cell voltage and the charge state of the reference cell at each acquisition moment, and a mapping relation of each cell is obtained; the mapping relation comprises a corresponding relation between the battery cell voltage and the state of charge at the battery cell temperature; determining the charge state of each battery cell at the voltage peak moment according to the battery cell voltage of each battery cell at the voltage peak moment and the mapping relation; and performing equalization processing on the battery pack according to the charge state of each battery cell at the voltage peak moment. According to the invention, the accuracy of identifying the state of charge by the charging terminal can be improved, so that the equalization effect is improved.

The invention discloses a ship power battery health state intelligent assessment method and system based on multi-feature fusion and a dynamic threshold value, and relates to the technical field of ship power battery management. The method comprises the following steps: synchronously acquiring single voltage, current, temperature, internal resistance and insulation resistance signals in real time through a signal acquisition layer; processing through a feature fusion layer to form a fusion feature vector; inputting the CBP-LSTM model to continuously output SOH and SOC estimation values in real time to form an SOH / SOC estimation sequence; calculating adaptive upper and lower threshold boundaries for the sequence based on an RLS algorithm; health levels are divided through comparison of the health deviation and a threshold value, a control instruction is generated and issued to a BMS / EMS system, and closed-loop protection and energy optimization are achieved. According to the method, the defects of insufficient feature dimension, high model rigidity, lack of adaptive ability and system closed loop deficiency in the prior art are overcome, the method has the advantages of high evaluation precision, strong robustness and good real-time performance, and the operation safety of the ship power battery can be effectively guaranteed.

The invention relates to the field of battery SOC estimation, and discloses a lithium battery SOC estimation method based on dynamic voltage, which is applied to low-end SOC estimation, and comprises the following steps of: calculating a dynamic voltage value according to polarization voltage change generated along with temperature change and current change of a lithium battery calibrated by a discharge OCV curve to obtain a dynamic discharge voltage-SOC curve table; therefore, SOC estimation is carried out according to the currently acquired cell voltage value. The invention also discloses a lithium battery SOC calibration device which comprises a cell monitoring and signal acquisition part for monitoring the voltage, current and temperature of the cell and a processor, and when the SOC is lower than a certain threshold value, the processor adopts the lithium battery SOC estimation method based on the dynamic voltage to correct and calibrate the low-end SOC estimated value of the lithium battery. When iteration continuous judgment is corrected, errors can be effectively avoided, SOC correction is more accurate and reliable, and a guarantee is provided for safe and stable operation of the battery cell.

Provided is an impedance measurement device 100 for measuring the impedance of a battery cell. The device acquires a cell voltage signal between the positive and negative electrodes of a battery cell 20 while a measurement current wave is made to flow through the battery cell 20, modulates the cell voltage signal with a polarity inversion wave synchronized with the half wave of the measurement current wave, adds the modulated wave at the non-inverted and inverted half-cycles of the modulated wave, and adds the modulated wave a prescribed number of times at a cycle synchronized with the polarity inversion wave, thereby generating an AC voltage detection signal, and measures the impedance of the battery cell 20 from the amplitude ratio and the phase difference between the AC voltage detection signal and the measurement current wave.

The invention discloses a component gradient iridium tantalum coating anode and a preparation method thereof, the component gradient iridium tantalum coating anode comprises a titanium-based bottom layer, a middle layer and a surface active layer structure with component gradient, and the middle layer and the active layer are both prepared through a thermal decomposition method. And the intermediate layer is prepared on the titanium substrate and is composed of TiO2 / Ta2O5 mixed oxide. The surface active layer is prepared on the outer side of the middle layer and comprises a plurality of layers of IrO2 / Ta2O5 oxide coatings with different iridium-tantalum proportions. Compared with a traditional uniform coating anode, the prepared component gradient iridium tantalum coating anode can relieve the stress concentration phenomenon and reduce coating cracking, the service life of the anode is remarkably prolonged, and the catalytic activity of the anode is remarkably improved; the modified carbon nano tube is added into the active layer precursor solution, so that the conductivity change caused by component gradient is improved, and the cell voltage of the component gradient iridium tantalum coating anode is effectively reduced; and moreover, the iridium content is lower, and the preparation cost of the electrode is reduced.

The invention relates to a voltage monitoring method and device, electronic equipment and a vehicle. The method comprises the following steps: acquiring cell voltages of a plurality of cells in a to-be-monitored target power battery; determining a first battery cell with an abnormal battery cell voltage from the plurality of battery cells according to the battery cell voltages of the plurality of battery cells; correcting the battery cell voltage of the first battery cell to obtain a corrected target battery cell voltage; determining a monitoring result of the target power battery according to the target battery cell voltage and the battery cell voltage of the second battery cell; the second battery cell is other battery cells except the first battery cell in the plurality of battery cells, and the monitoring result represents whether the voltage consistency of the target power battery is abnormal or not.

The disclosure relates to an apparatus for diagnosing a battery of a vehicle, the apparatus being capable of performing reliable diagnosis with respect to low voltage of a battery of a vehicle, a battery diagnostic method thereof, and a vehicle system including the same. The apparatus may include a voltage sensor measuring voltage of a plurality of battery cells in the battery, and a processor performing low voltage diagnosis with respect to the battery on the basis of the cell voltage measured by the voltage sensor. The processor may determine whether or not the cell voltage satisfies a preset diagnostic condition when the cell voltage satisfies a diagnosis start condition, and when the processor determines that the cell voltage satisfies the diagnostic condition, the processor may diagnose that the battery is at a low voltage state.

The invention discloses a low-power-consumption data transmission method for a low-orbit satellite internet-of-things terminal, and relates to the technical field of satellite communication, and the method comprises the steps: calculating an overhead time window through employing a satellite ephemeris and a terminal GNSS coordinate, and introducing atmospheric refraction and movement position correction; determining a wake-up advance containing equipment preheating and error compensation, and waking up the terminal before the window; the battery voltage is collected, and three strategies of band cascade coding, compression and error correction sending and only data abstract sending are divided according to the electric quantity; receiving satellite dynamic energy factors to adjust transmitting power and the number of data packets; and after completion, entering dormancy, and only leaving a low-power-consumption clock to maintain a time sequence. Through accurate awakening, hierarchical transmission, double-clock calibration and self-learning, the terminal endurance is prolonged, the access success rate and the link utilization rate are improved, and power consumption and reliability are balanced.

A battery diagnosis apparatus for diagnosis of a cell group including a plurality of battery cells connected in series, includes a voltage sensing circuit configured to periodically generate a voltage signal indicating a cell voltage of each battery cell, and a control circuit configured to generate time series data indicating a change in cell voltage of each battery cell over time based on the voltage signal. The control circuit is configured to (i) determine a first average cell voltage and a second average cell voltage of each battery cell based on the time series data, wherein the first average cell voltage is a short term moving average, and the second average cell voltage is a long term moving average, and (ii) detect an abnormal voltage of each battery cell based on a difference between the first average cell voltage and the second average cell voltage.

The invention relates to the technical field of lithium battery energy storage system intelligent detection and operation and maintenance, and discloses a lithium battery energy storage system battery cluster consistency detection device and method. The method comprises the steps that detection loops of battery clusters are sequentially connected through a control system, characteristic voltage and current signals of each battery cluster are collected, the consistency characteristic value of each battery cluster is calculated, and the dispersion rate between the clusters is analyzed through accumulative root-mean-square deviation; compared with the prior art which only depends on single cell voltage detection and cannot realize real-time monitoring and early warning of the consistency of the battery clusters especially under a multi-cluster parallel working condition, the method provided by the invention realizes rapid identification of the inconsistency between the battery clusters through accurate characteristic voltage acquisition and dispersion rate calculation, and improves the detection accuracy of the inconsistency between the battery clusters. Therefore, system potential safety hazards caused by degradation or faults of the battery clusters are avoided, and the safety, the reliability and the operation and maintenance efficiency of the energy storage system are improved.

A method for estimating current-dependent non-linear equivalent circuit model (ECM) parameters of a battery may include measuring a battery voltage across terminals of the battery and a battery current drawn from the battery, deriving linear ECM parameters for modeling a linear ECM of the battery with multiple resistive-capacitive elements with different time constants to characterize temporal behaviors of the battery, continuously tracking an impedance for each of the multiple resistive-capacitive elements and an open circuit voltage of the battery, continuously monitoring the battery current to detect high current events, continuously tracking a deviation for each of the multiple resistive-capacitive elements during the high current events, and deriving non-linear online ECM parameters based on the linear ECM parameters and the deviations for the multiple resistive-capacitive elements during the high current events.

The invention relates to the technical field of fuel cell control, and discloses a control method of a hydrogen fuel system controller, which comprises the following steps: in response to a system shutdown instruction, controlling a DC / DC converter to maintain operation and request a preset scavenging current, and consuming residual reaction gas in a flow channel and a pipeline by using an electrochemical power generation reaction in an electric pile; meanwhile, hydrogen-cut air-down operation is executed, and the average single voltage of the electric pile is collected in real time; when it is monitored that the average monomer voltage is reduced to be below a preset anti-corrosion safety threshold value, the DC / DC converter is controlled to be disconnected, and mechanical purging is started. A time sequence interlocking mechanism of electrochemical energy depletion and mechanical purging is established, a high-potential retention path in the shutdown process is blocked from the physical and chemical source, and the safety of the shutdown is improved. Reverse polarity corrosion caused by a hydrogen-air interface effect is avoided, and the service life of the galvanic pile is prolonged.

The invention relates to the technical field of charging, and particularly discloses a method for dynamically optimizing the full charge capacity of a lithium battery in an unbalanced state. Dynamically adjusting the standing duration according to the average temperature and the cycle index of the current battery pack, standing to eliminate the polarization effect, and obtaining stable open-circuit voltage of each monomer; inquiring a pre-established open-circuit voltage-state-of-charge characteristic table based on the obtained minimum monomer voltage to obtain the state of charge of the minimum-capacity monomer; generating a segmentation correction formula based on a segmentation threshold value and a gain coefficient dynamically determined by utilizing a large number of full charge capacity correction examples; updating the full-charge capacity by adopting a segmented correction formula and the charge state of the minimum-capacity monomer to obtain a full-charge capacity dynamic optimization result; the accuracy of full charge capacity calculation is effectively improved, the real full charge capacity of the lithium battery in an unbalanced state is better reflected, the service life of the battery is prolonged, and the use efficiency of the battery is improved.

The embodiment of the invention provides a charging and discharging circuit of a battery, the battery comprises a first battery cell and a second battery cell which are connected in series, and the negative electrode of the first battery cell is electrically connected with the positive electrode of the second battery cell. The charging and discharging circuit comprises an equalization circuit and a voltage conversion circuit, the voltage conversion circuit can convert an input voltage into a first voltage and a second voltage, provide the first voltage to a first battery cell, provide the second voltage to a second battery cell and provide the first voltage and the second voltage to a load in a charging stage, and the equalization circuit can convert the input voltage into the first voltage and the second voltage in a charging and discharging stage. When the voltage difference between the first battery cell voltage and the second battery cell voltage is larger than a first preset voltage, the positive electrode voltage of the discharging battery cell is converted and provided for the charging battery cell until the voltage difference between the first battery cell voltage and the second battery cell voltage is smaller than a second preset voltage, and a first power rail and a second power rail are provided for a load in the discharging stage. The charging and discharging circuit can improve the charging and discharging efficiency of the battery.

The invention is suitable for the technical field of electrical measurement and state monitoring, and provides an aluminum electrolysis cell power distribution system regionalization independent blanking control method based on pseudo resistance monitoring, and the method comprises the steps: collecting the anode current and the cell voltage of each measurement point; dividing the plurality of measurement points into a plurality of control areas, and calculating a pseudo resistance value of each control area; screening control areas meeting conditions from all the control areas to form a reference area set; determining an aluminum oxide concentration reference state of each control region in the reference region set through a preset concentration state mapping relation; with the reference region set as a starting point, according to the proximity relation between the control region with the undetermined state and the reference region set in space and the similarity of pseudo resistance values, the aluminum oxide concentration state is propagated to all the control regions through iterative matching; according to the aluminum oxide concentration states of all the control areas, independent discharging control instructions of all the control areas are generated; and the regionalized independent control on the concentration of aluminum oxide in the aluminum electrolysis cell is realized.

The invention relates to a battery detection method and device, equipment, a storage medium and a program product. The method comprises the following steps: sorting each cell voltage of each to-be-detected battery at an end moment in a target time period within a to-be-detected time period to obtain a sorting result, taking two adjacent cell voltages in the sorting result as cell voltage groups, determining a voltage difference degree of each cell voltage group according to the two cell voltages in each cell voltage group, and determining the voltage difference degree of each cell voltage group according to the voltage difference degree of each cell voltage group. And determining a first voltage dispersion of the to-be-detected battery corresponding to the ending moment according to each voltage difference degree, and detecting each to-be-detected battery to obtain a detection result according to the first voltage dispersion of each to-be-detected battery corresponding to the target time period in the to-be-detected time period. The accuracy of a detection result obtained by detecting the battery can be improved.

The invention provides a QLC NAND interference compensation control method and system, and the method comprises the steps: collecting adjacent unit voltage offset data of a target storage unit through an on-chip reference unit array integrated on a QLC NAND flash memory chip; performing feature extraction on the data to obtain interference feature parameters including at least one of voltage drift amplitude, drift rate and drift fluctuation frequency, and inputting the interference feature parameters into a pre-trained lightweight decision tree model to output an interference trend prediction result, a programming parameter optimization strategy is generated based on the result, the pulse width and the step voltage increment are optimized, meanwhile, fine adjustment of model parameters is triggered by collecting programming verification data after each time of optimization, dynamic accurate compensation of memory cell interference under the high write-in load of the QLC NAND flash memory is achieved, programming voltage drift is effectively restrained, and the reliability of the QLC NAND flash memory is improved. The adaptive capacity of the writing algorithm is improved, and the overall service life of the flash memory is prolonged.

The invention relates to a preparation method and application of an electrode, in particular to a preparation method and application of an anti-reverse current self-supporting electrode for anion exchange membrane water electrolysis hydrogen production. The self-supporting (NiCoFe) 9S8 electrode is constructed by adopting a directional solid-phase synthesis strategy to overcome the challenge of performance degradation of the electrolytic cell. The preparation method comprises the following steps: firstly, depositing a precursor solution of FeS2 and CoCl2 on a nickel felt substrate, and then carrying out annealing treatment to obtain uniformly grown (NiCoFe) 9S8; the method not only ensures uniform distribution of multiple metal components, but also constructs firm chemical bonding and efficient charge transfer between the catalyst layer and the conductive substrate through solid-phase interface reaction, and effectively avoids interface impedance caused by introduction of an additional binder. Therefore, high-current-density water electrolysis hydrogen production under intermittent fluctuation power supply is realized. In 1M KOH, the cell voltage is almost not attenuated when the electrode stably operates for 2000h at 500mAcm <-2 >.

The invention provides an electrical performance calibration device and method for fusing electrolytic hydrogen production and a hydrogen fuel cell. The electrical performance calibration device comprises an upper computer, a first digital sampling voltmeter, a second digital sampling voltmeter, a synchronous data acquisition card, a synchronous inspection switch, a current converter, a voltage converter, an electric pile, a programmable power supply, a self-calibration module and an external calibration signal source, the synchronous inspection switch is used for detecting a single-cell voltage bus of a galvanic pile and feeding back the single-cell voltage bus to a sampling end of the first digital sampling voltmeter, and a feedback end of the first digital sampling voltmeter is connected with a first input end of the upper computer; the current converter is used for detecting a current loop of the galvanic pile; the voltage converter is used for detecting the total voltage of the electric pile; and the programmable power supply is connected with a power supply terminal of the electric pile. According to the invention, the problems of poor synchronism, lack of self-calibration, low impedance measurement precision and incompatibility of two-way metering during electrical performance calibration of electrolytic hydrogen production and hydrogen fuel cells are solved.

The invention discloses an anode purging method and device of a proton exchange membrane fuel cell system and a medium, and can be applied to the technical field of fuel cells. When the request current is greater than or equal to the idle current, the target average single voltage of the electric pile in the proton exchange membrane fuel cell system is calculated according to the request current, and the lowest actual single voltage, the actual average single voltage of the electric pile and the cathode and anode voltage difference of the electric pile are obtained; determining an anode target purging mode of the proton exchange membrane fuel cell system according to the lowest actual monomer voltage, the actual average monomer voltage of the electric pile, the target average monomer voltage of the electric pile and the anode and cathode voltage difference, and then controlling the anode purging state of the proton exchange membrane fuel cell system according to the anode target purging mode; according to the embodiment of the invention, the target blowing mode of the anode is determined by combining the performance expression data of the fuel cell under the ultralow-frequency blowing condition of the anode, so that the stability and the safety of the proton exchange membrane fuel cell system can be effectively improved.

The invention provides a preparation method of a high-performance titanium anode. The preparation method comprises the following steps: pretreating a titanium substrate; the preparation method comprises the following steps: coating a tantalum-containing solution on a titanium substrate, and carrying out drying, pre-sintering and oxidation treatment to form a Ta2O5 bottom layer; wherein the drying temperature ranges from 80 DEG C to 110 DEG C, and the drying time ranges from 8 min to 12 min; the presintering temperature is 450-550 DEG C, and the presintering time is 8-15 minutes; the oxidation treatment temperature ranges from 600 DEG C to 680 DEG C, and the oxidation treatment time ranges from 1.5 h to 2.5 h; the surface of the Ta2O5 bottom layer is coated with a Pt-Ti alloy solution, then sintering is conducted for 10-20 min at the temperature of 500-550 DEG C, and a middle layer is formed; the surface of the middle layer is coated with an Ir-Ta-Sn-Co-Mn solution for 3-5 times, sintering is conducted for 10-15 min at the temperature of 500-600 DEG C after each time of coating, and a surface active layer is formed; wherein the molar ratio of all metal components in the Ir-Ta-Sn-Co-Mn solution is as follows: Ir: Ta: Sn: Co: Mn is equal to 7.16: 4.5: 0.8: 0.8: (0.5-1.2). According to the preparation method of the high-performance titanium anode, through staged sintering, multi-layer component regulation and control and process optimization, the problems of insufficient coating compactness, matrix passivation and low Ir utilization rate are solved, and the technical effects that the strengthening life is larger than or equal to 20 days (40000 A / m), and the bath voltage reduction is larger than or equal to 10% are achieved. The invention further provides the high-performance titanium anode and application thereof.

The invention is applied to the technical field of charging, and provides a charging method, a medium and an electronic device, and the method comprises the steps: obtaining a battery voltage of the electronic device in real time, and obtaining a target charging current based on the obtained battery voltage, the target charging current, and a first voltage between a battery and the charging device when the target charging current is used for charging the battery; and determining the output voltage of the power adapter. Then, the electronic device can send a notification of adjusting the output voltage to the target charging voltage to the power adapter, so that the power adapter can adjust the output voltage to the target charging voltage, and then the charging current of the battery is adjusted to the target charging current. Thus, in the constant current stage in the fast charging mode, constant current ripples can be reduced, then the average charging current is increased, the charging electric quantity in unit time is increased, and the charging time is saved. And moreover, the time of charging current climbing and falling can be shortened, so that the charging efficiency can also be improved.

The invention provides a battery health degree detection method and apparatus, and a medium. The method comprises the steps of collecting data related to a battery; defining a reference parameter group set according to the data, wherein the set at least comprises the following reference parameters: a cell voltage difference, a power consumption mean value, a cell temperature difference, an accumulated mileage, a battery calendar life, an accumulated cycle index, a battery material coefficient, a battery combination string number and a state of charge; classifying and normalizing the reference parameters, and calculating an environment correction coefficient, a calibration coefficient and a dynamic weight factor according to the classified and sorted data; calculating an attenuation contribution value and a total attenuation value of each reference parameter according to the normalized data, the environment correction coefficient, the calibration coefficient and the dynamic weight factor; and calculating a battery health degree value according to the total attenuation value. The battery pack does not need to be disassembled, the detection operation is simple, convenient and rapid, a multi-parameter coupling mechanism is adopted in the calculation process, and the detection accuracy is high.

The invention belongs to the field of preparation of nano materials, and discloses a CoP / Co (OH) 2 sea urchin-shaped heterojunction catalyst growing on foamed nickel and a preparation method and application of the CoP / Co (OH) 2 sea urchin-shaped heterojunction catalyst. Alkali cobalt carbonate (CoCH) is used as a precursor, a crystalline phase CoP substrate is generated through a low-temperature phosphating method, then the surface of the crystalline phase CoP substrate is uniformly coated with an amorphous Co (OH) 2 layer through an electro-deposition process, and the self-supporting phosphating / hydroxyl heterogeneous structure catalyst (CoP / Co (OH) 2) is successfully constructed. The obtained CoP / Co (OH) 2 shows excellent complete water splitting performance, and is benefited from the high-activity specific surface area (Cdl = 44.66 mF cm <-2 >) and the interface rapid electron conduction characteristic (Rct = 0.43 omega) of a heterogeneous structure; when two electrodes are assembled to fully decompose water, the cell voltage is only 1.780 V when the current density is 250 mA cm <-2 >, and after continuous operation is carried out for 24 hours, the performance is basically kept unchanged, and the voltage fluctuation ratio is lower than 0.5%. CoP / Co (OH) 2 is prepared into a 2 * 2cm < 2 > self-supporting electrode to construct AEMWE, only 2.08 V cell voltage is needed under the ultrahigh current density of 1A cm <-2 >, the AEMWE can stably run for 250 hours, the attenuation rate is 80 mu V h <-1 >, meanwhile, the hydrogen production efficiency is calculated to reach 96.2% through gas metering and Faraday law, and the engineering potential of the AEMWE in large-scale hydrogen production application is verified.

Multi-cell battery management devices, systems, and methods are disclosed herein. A multi-cell battery management device comprises a battery pack including a power output terminal and a plurality of battery cells each having a positive and a negative terminal and connected in series fashion. Each of the plurality of battery cells includes: i) a cell control processor to monitor cell voltage, cell current, cell temperature, and cell fuse status; ii) a programmable shunt controlled by the cell control processor that varies the internal resistance of each of the cells; and iii) a data communications circuit connected to the cell control processor and to the positive and negative terminals of each cell, the communications circuit enabling data communication over the battery cell positive and negative output terminals, and wherein the cell control processor responds to commands received via the data communications circuit to vary the operating state of the programmable shunt.

The invention relates to the technical field of rare earth electrolytic metallurgy, and discloses a praseodymium-neodymium alloy low-temperature electrolysis cell voltage optimization method and system.The method comprises the steps that multi-parameter coupling analysis is conducted on an electrolytic cell low-temperature electrolysis initial parameter set, and key influence factors are obtained; carrying out correlation analysis on the key influence factors by combining fluctuation characteristics of the cell voltage to obtain an influence weight sequence; determining a collaborative adjustment scheme of the polar distance and the current density according to the weight sequence; the cell voltage is synchronously adjusted based on the collaborative adjustment scheme, and accurate control over the two is achieved; the operation parameters of the electrolytic cell are collected and integrated to obtain a feedback parameter set, the feedback parameter set is fed back to a correlation analysis link to optimize the key influence factor identification precision, and finally a cell voltage optimization scheme is obtained. The technology can accurately identify the key influence factors, dynamically adapt to the operation change of the electrolytic cell, improve the stability of the cell voltage, reduce energy consumption and cost, and improve the efficiency of cell voltage optimization. The production efficiency and the product quality are ensured.

The utility model provides a wireless grounding resistance precision monitoring device based on low power consumption, which comprises a power supply circuit, a wireless communication circuit, a measuring circuit and a main control circuit, and is characterized in that the power supply circuit is used for stabilizing, boosting and stabilizing the voltage of a battery and supplying power after positive and negative conversion; the wireless communication circuit is used for wirelessly sending the calculated grounding resistance value to an upper platform or a central control unit, so that a worker can monitor the equipment; the measuring circuit is used for performing amplification, filtering and alternating current-direct current conversion on the acquired grounding resistance signal and then transmitting the signal to the main control circuit to calculate a grounding resistance value; and the main control circuit is electrically connected with the wireless communication circuit and the measuring circuit and is used for controlling the wireless communication circuit to transmit and receive signals, calculating a grounding resistance value, switching working states of the wireless communication circuit and the measuring circuit and automatically awakening the wireless communication circuit and the measuring circuit. According to the wireless grounding resistance precision monitoring device provided by the invention, the wiring complexity and the power consumption are reduced, and the measurement precision is improved.