1038 results about "Self-discharge" patented technology

The invention discloses an optical storage and charging integrated intelligent management system and method based on a virtual power plant platform, relates to the technical field of optical storage and charging, and aims to solve the problems that in energy storage battery management, long-time storage may cause increase of self-discharge rate of batteries and aggravated capacity attenuation, but an existing system often adopts a unified management strategy, batteries with different storage times are not distinguished, and the energy storage efficiency is poor. According to the optical storage and charging integrated intelligent management system and method based on the virtual power plant platform, the storage time and temperature of the energy storage battery are incorporated into a charging and discharging management strategy, so that the service life of the battery is prolonged; the charging and discharging logic can be dynamically adjusted according to charging requirements and light energy input changes, the adaptability of the system to complex conditions is enhanced, energy waste and charging delay are avoided, and the energy utilization efficiency is improved; the maintenance cost and the downtime are reduced, and the overall reliability and flexibility of the system are improved.

The invention relates to the technical field of supercapacitors, and provides a cement-based supercapacitor, a preparation method and application. The cement-based supercapacitor comprises a cement-based electrolyte and two structural electrodes arranged on the two sides of the cement-based electrolyte. The cement-based electrolyte is prepared from cement, alkali, alkali metal salt, water and an additive, wherein the alkali metal salt comprises lithium salt; each structural electrode is composed of foamed nickel loaded with nitrogen-doped reduced graphene oxide. The lithium salt is added to construct an efficient ionic conductive network, so that the ionic conductivity of the cement-based electrolyte is enhanced, and the electrochemical performance is obviously improved. The reduced graphene oxide in the structural electrode is doped with nitrogen to enhance the electrostatic force between ions and the surface of the electrode, so that the electrochemical stability of the surface of the electrode is improved, and self-discharge is effectively inhibited. By improving an electrolyte and a structural electrode material, a cement-based supercapacitor with specific capacitance and mechanical properties is obtained and is combined with a building structure to realize building energy storage.

The invention relates to the field of lithium battery detection, and particularly discloses a lithium ion battery fault detection method, which comprises the following steps of: firstly, acquiring total current data of a battery pack in real time, and judging the current running state of a battery system according to the total current of the battery pack and the duration time; and when the battery system is in a standing state, calculating the voltage drop rate and the temperature rise rate of each single battery in a preset time window, and comparing the voltage drop rate and the temperature rise rate with corresponding thresholds to realize self-discharge detection and fault identification. And when the battery system is in a charging or discharging state, a deep learning algorithm is further introduced, temperature-pressure coupling time sequence fluctuation characteristics of each single battery are extracted, and temperature-pressure coupling time sequence fluctuation state consistency analysis is performed on each single battery, so that intelligent detection of faults of the single batteries in the charging and discharging process is realized. According to the method, the abnormal temperature and pressure fluctuation of the single battery in the charging and discharging process can be effectively captured, so that early warning and accurate positioning of a fault are realized.

The invention relates to a lithium ion battery self-discharge consistency screening method. The method comprises the following steps: S1, fully charging n formed battery cells, carrying out constant-current discharge to 2.5 V after shelving, obtaining a discharge curve, and recording inflection point voltage U1 on the curve; s2, recording a corresponding voltage value on the curve, which is less than or equal to U1 and greater than 3% SOC, as U2; charging the battery cell to U2; s3, placing all the battery cells T1, placing the battery cells T2 at a high temperature, continuously placing the battery cells T3 at a normal temperature, and testing an open-circuit voltage OCV2; placing the battery cell at normal temperature for T4, and testing open-circuit voltage OCV3; s4, calculating a K value of each battery cell; s5, calculating an average value alpha and a standard deviation sigma of the K values of all the battery cells; and S6, comparing the K value of each battery cell with the value of alpha + x sigma, and screening out the battery cells of which Ki is greater than alpha + x sigma in the group. According to the method, the test time is shortened, the influence of temperature and polarization on the test is reduced, and the screening result is more accurate.

The invention relates to a battery self-discharge characteristic analysis and rapid evaluation method, and aims to improve the precision and efficiency of battery self-discharge performance detection. According to the method, in a set environment stable interval, an instantaneous voltage change sequence and a current perturbation response sequence of a target battery are acquired through micro-load disturbance, and a battery internal resistance dynamic evolution tensor representing dynamic response characteristics in the battery is constructed; extracting local features by applying a multi-scale time window segmentation strategy, forming a feature vector group containing a voltage nonlinear rebound factor and a delay response index, inputting the feature vector group into a trained Bayesian weighted adaptive mapping network, and outputting a battery self-discharge rate estimated value combining a manufacturing batch residual error and temperature offset compensation; performing trend fitting and consistency checking on the estimated value to obtain a battery self-discharge grade evaluation result, and generating a structured detection report containing initial offset, rebound amplitude and estimation confidence; the method can be widely applied to battery production, quality control and performance screening scenes.

The present invention provides an absorption-desorption based Carnot battery designed to achieve a high-efficiency, large-density, and low-loss conversion battery system for power-heat-power purpose. Based on the rational operating strategies, the current Carnot battery system design demonstrates outstanding energy storage density and round-trip efficiency, while the self-discharging loss is minimal even after prolonged standby time. The battery system of the present invention also enables further designs with flexibility in adopting different operating modes for versatile functions to provide electricity, heating, and cooling.

The invention relates to the technical field of batteries, in particular to a diaphragm and a battery comprising the diaphragm. The diaphragm comprises a base material and a ceramic layer located on the surface of one side or two sides of the base material, the ceramic layer comprises inorganic particles and a first polymer, the ceramic layer is of a porous structure, the porous structure comprises holes with the diameter larger than or equal to 0.5 micrometer, and the diameter of each hole is larger than or equal to 0.5 micrometer within the range of 100 micrometers * 100 micrometers randomly selected on the surface of the ceramic layer. The number of pores having a diameter > = 0.5 [mu] m is from 10 to 800 and the number of the first polymer is from 10 to 500; the diaphragm meets the following relational expression: 1 < D1 / D2 < 20, D1 is the average diameter of pores with the diameter greater than or equal to 0.5 [mu] m in the ceramic layer, and the unit is [mu] m; d2 is the average particle size of the inorganic particles, and the unit is [mu] m. Comprising the diaphragm disclosed by the invention can have relatively high long cycle performance and fast charge performance under the condition of not influencing self-discharge and safety performance.

The invention relates to the field of power batteries, and discloses a battery cell self-discharge intelligent screening method, which comprises the following steps: firstly, calculating a self-discharge rate factor K value of a battery cell in a finished product standing warehouse process section, if the K value does not reach the standard, rejecting the battery cell, if the K value reaches the standard, putting the battery cell into a finished product warehouse for standing, and then calculating a self-discharge rate factor K2 value of the battery cell in a rubber coating process section, according to K2 values of the battery cells in different offline time periods and at different temperatures, a nonlinear binary regression equation is fitted, so that a theoretical value and an actual value of K2 are calculated to judge the self-discharge condition of the battery cells, and the battery cell self-discharge intelligent screening method is suitable for battery cell offline from a finished product standing warehouse to module making or module making. According to the invention, the battery cells and modules with poor self-discharge are intercepted in the whole process of self-discharge and packaging of finished products, so that the battery cells with voltage difference and undervoltage risks are prevented from flowing into the market, and the detection accuracy and delivery quality of the self-discharge performance of the battery cells are improved.

The invention discloses a two-phase electrolyte, a preparation method thereof and a liquid energy storage battery system, and belongs to the technical field of electrochemical energy storage. According to the invention, a liquid-liquid double-phase electrolyte is composed of a water-phase electrolyte and an organic-phase electrolyte, wherein the organic-phase electrolyte contains a coupling system of 1-(methyl-decyl)-3-methylimidazolium bromide, tris (methyl-decyl) methyl ammonium bromide and (10-octadecyl) alkyl trimethyl ammonium bromide in a molar ratio of (5-7): (2-4): 1. During charging, positive electrode bromide ions are subjected to an oxidation reaction to generate a bromine simple substance, and meanwhile, the bromine simple substance and a coupling system of the quaternary ammonium bromide compound and the bromine complexing agent provided by the invention form a stable polybromine complex product, so that the polybromine complex product is prevented from being migrated into a water-phase electrolyte, and the purpose of improving the stability of the water-phase electrolyte in the absence of a diaphragm is achieved. The self-discharge reaction of bromine is significantly inhibited at a high temperature exceeding the boiling point temperature of bromine, the coulombic efficiency and energy efficiency of the liquid energy storage battery are improved, the system cost is reduced, and the long-term cycle stability of the liquid energy storage battery is improved.

The invention discloses a high-first-effect and low-stress silicon-oxide-based all-solid-state lithium battery, and a preparation method of the high-first-effect and low-stress silicon-oxide-based all-solid-state lithium battery comprises the following steps of: introducing a pre-lithiation method in a process of preparing a silicon-oxide-based negative electrode or a process of assembling the lithium battery; the pre-lithiation method comprises a lithium-copper composite belt in-situ pre-lithiation method, a pre-lithiation additive method, a self-discharge contact pre-lithiation method, a chemical pre-lithiation method and an electrochemical pre-lithiation method. Pre-lithiation is carried out through a proper pre-lithiation method, so that the consumption of irreversible lithium in the first-circle lithiation process is reduced, and the first-circle coulombic efficiency of the battery is improved; meanwhile, the silicon monoxide-based all-solid-state lithium battery with high initial efficiency and low stress can be obtained through the method, and the method has the advantages of simple process, high universality, obvious effect and the like.

The invention provides a battery charging rate determination method and device, electronic equipment and a storage medium. The method comprises the following steps: obtaining a self-discharge current of a battery in each cycle charging process; the self-discharging current is the self-discharging current collected in the constant-voltage charging process when the battery is charged at a first charging rate in each circulating charging process until the electric quantity parameter of the battery reaches a preset electric quantity parameter and the battery is continuously charged in a constant-voltage charging mode; the values of the first charging multiplying power of the battery are different in different cyclic charging processes; and determining the corresponding maximum charging rate of the battery under the preset electric quantity parameter based on the self-discharging current. According to the embodiment of the invention, the maximum charging rate of the battery is determined based on the self-discharging current, and the battery is guided to be charged through the maximum charging rate, so that metal deposition in the battery can be reduced, and the risk of side reaction can be reduced while the charging efficiency of the battery is improved.

The present application relates to an over-discharge early-warning method and apparatus, and an electronic device, a storage medium and a program product. The method comprises: acquiring monitoring data of a target battery within a preset historical time period; acquiring the state of charge and self-discharge rate of the target battery on the basis of the monitoring data; and determining an early-warning duration on the basis of the state of charge and the self-discharge rate, wherein the early-warning duration is the duration within which the target battery performs self-discharge from the state of charge to an early-warning state of charge. By using the method, whether a battery is over-discharged can be determined in a timely manner, thereby reducing an over-discharge risk of the battery.

The invention discloses a slurry electrolysis device and battery production equipment, and relates to the technical field of lithium batteries. As an electrolysis positive electrode and an electrolysis negative electrode are positioned between a slurry inlet and a slurry outlet and are in contact with battery slurry, the electrolysis positive electrode and the electrolysis negative electrode are in contact with the battery slurry; under the condition that the potential applied by a power supply for connecting the electrolysis positive electrode and the electrolysis negative electrode is greater than the oxidation potential of a to-be-electrolyzed metal element or alloy in the battery slurry, the to-be-electrolyzed metal element or alloy in the battery slurry can serve as a micro positive electrode, the surface of the to-be-electrolyzed metal element or alloy is oxidized due to potential difference and is gradually dissolved into ions, and the ions are gradually dissolved along with electrolysis. And large metal elementary substance particles are continuously oxidized, the volume is gradually reduced, and finally, the metal elementary substance particles are completely dissolved into metal ions without discharge risk, so that the removal of the metal elementary substance or alloy to be electrolyzed in the battery slurry is realized, and the self-discharge risk of the battery is reduced.

The invention relates to the technical field of batteries, and discloses a roll core and a battery. The roll core comprises a positive plate, a negative plate and a diaphragm, a groove is formed in a positive active layer of the positive plate, and the groove is at least formed in an arc section, closest to the winding center, of the positive plate, so that the thickness of at least partial region on the arc section of the positive plate is reduced, and the risk that active particles on the positive plate pierce the diaphragm is reduced; according to the present invention, by limiting the ratio p1 / H1 between the thickness p1 of the functional layer of the diaphragm and the depth H1 of the groove to be in the range of 0.02-2, the p1 is in the range of 0.3-10 [mu] m, and the H1 is in the range of 3-40 [mu] m, such that the battery can be reduced to the preset charging cut-off current during the charging process, and the self-discharge rate of the battery can be reduced. And on the basis that the battery can reach a fully-charged state, the liquid retention capacity of the battery can be improved, the cycle performance of the battery is improved, and the battery is ensured to have relatively high volume energy density.

The invention provides a battery self-discharge detection method and device, electronic equipment and a storage medium, and relates to the technical field of batteries, and the method comprises the steps: obtaining voltage change rate sample data and self-discharge historical data of a battery based on battery performance data; based on the voltage change rate sample data and the self-discharge historical data, a voltage change rate standard value of the battery in a target period is determined, and the target period comprises at least two periods with different time lengths; the self-discharge historical data comprises a historical voltage change rate; and according to the actual voltage change rate of the battery and the voltage change rate standard value of the target period, carrying out self-discharge anomaly detection on the battery. According to the invention, the problem of limitation of self-discharge rate detection of the existing battery can be solved in a targeted manner.

The invention discloses a battery anomaly detection method and device and electronic equipment. The method relates to the technical field of batteries, and comprises the following steps: in response to a received electrolyte injection instruction, controlling to inject an electrolyte into a to-be-detected battery, so that the electrolyte infiltrates a pole piece of the to-be-detected battery; acquiring a voltage change curve of the to-be-tested battery in the infiltration process; and based on the voltage change curve, determining an anomaly detection result of the to-be-detected battery, the anomaly detection result being at least used for indicating whether self-discharge anomaly exists in the to-be-detected battery. According to the invention, the technical problem of low detection efficiency of battery self-discharge anomaly detection after battery manufacturing in the prior art is solved.

The invention discloses an electric two-wheeled vehicle charging method and device with an intelligent fault diagnosis function and a storage medium, and relates to the technical field of electric vehicle charging fault diagnosis, the method has an intelligent fault diagnosis function, various data in the charging process can be monitored and analyzed in real time, potential faults can be recognized in advance, and charging safety and equipment reliability are improved. According to data collected by a sensor network, such as charging state, short circuit fluctuation, leakage current and cable temperature, the system can automatically identify faults such as poor plug contact, micro short circuit, electric leakage and temperature abnormity, generate corresponding fault instructions and timely take measures such as power failure and alarm to prevent accidents. And the self-discharge monitoring function can also judge whether self-discharge abnormity exists in the battery according to battery discharge data, and timely notify a user to overhaul, so that the battery is prevented from being damaged.

The invention discloses an electrolyte for a lead storage battery, a formation charge-discharge process and a preparation method of the lead storage battery, and relates to the technical field of storage batteries. A modified biological bacterium additive is added to a common electrolyte of a battery in production, the activity of the electrolyte is improved, the influence of electrolyte impurities is reduced, and charging voltage value limitation is carried out in a formation charging and discharging process stage to prevent internal electrolyzed water of the battery from being overcharged; therefore, the density consistency and stability of the battery electrolyte are improved, the utilization rate of sulfate ions is improved, the charge-discharge efficiency of the battery is improved, grid corrosion and battery self-discharge of a battery pole plate caused by a cyclic electrochemical action reaction are restrained, and the capacity retention ratio and the cycle life performance of the battery are improved. And a formation charge-discharge process is optimized, so that the battery capacity matching rate and the performance consistency are improved, and the cycle life performance of the battery is improved.

The invention discloses a battery display SOC following correction method and system, and relates to the technical field of power batteries. The battery display SOC following correction method comprises the following steps: S1, acquiring the voltage of a single battery based on a battery management system, judging the current charging and discharging mode of the battery, if the battery is in the charging mode, entering S2, and otherwise, entering S3; and S2, comparing the highest single voltage in the single battery voltage with a first voltage threshold, and if the highest single voltage is smaller than the first voltage threshold, obtaining a real SOC target value and displaying the SOC target value according to the highest single voltage, the single voltage difference and the delta SOC look-up table. According to the method, the problems that when the single batteries are inconsistent or the self-discharge difference is large, but the batteries do not meet the correction condition, the real SOC of the batteries does not accord with the actual state of the batteries at the moment, the real SOC jump is triggered until the charging and discharging tail ends are reached or the correction condition is met when the batteries are fully charged and discharged, and the displayed SOC can be rapidly corrected along with the battery at the moment are solved.

A battery cell and a manufacturing method therefor, a battery, an electrical device, and a pre-lithiated positive electrode sheet and a manufacturing method therefor. The preparation method for the battery cell comprises the steps of: providing a positive electrode sheet, a negative electrode sheet, a separator, an electrolyte, an insulating coating slurry and lithium metal simple substance material; coating the surface of a positive electrode active material layer with the insulating coating slurry, and drying same to form an insulating coating; attaching the lithium metal simple substance material to the surface of the insulating coating so as to obtain a pretreated positive electrode sheet; assembling the obtained pretreated positive electrode sheet, the separator and the negative electrode sheet to obtain an electrode assembly; and assembling the obtained electrode assembly and the electrolyte to obtain the battery cell. Under the function of the electrolyte, the pretreated positive electrode sheet realizes a pre-lithiation reaction by means of a self-discharge effect and forms a pre-lithiated positive electrode sheet. The battery cell has a high initial coulombic efficiency, good cycle performance and good processability.

The invention discloses an energy storage battery pack self-discharge abnormity diagnosis method based on short-time charging data, and belongs to the technical field of battery safety monitoring. In order to overcome the defects that an existing method depends on a complete charging and discharging period and is difficult to adapt to a multi-stage variable working condition scene, multi-stage charging data features are extracted, self-adaptive extraction of multi-working condition features is achieved in combination with an auto-encoder, a data driving model fusing GCN-BiLSTM (Graph Convolution-Bidirectional Long Short-Term Memory) is constructed, and a multi-stage variable working condition scene is obtained. According to the method, the RCC (Remaining Charge Capability) of the single battery is accurately estimated, and the RCC of the single battery is accurately estimated. And finally, on the basis of the size, the distribution and the change condition of each single RCC in the battery pack, the overall inconsistency of the battery pack, the SOC inconsistency of the single batteries and the self-discharge fault can be diagnosed. And a guarantee is provided for safe operation of the energy storage system.

The invention discloses a detection device with a power supply self-compensation function and a compensation method thereof. The compensation method comprises the following steps: detecting whether an external power supply is switched on or not; if the external power supply is switched on, judging whether the power supply voltage of the external power supply is higher than the working voltage threshold of the sensor unit through the low-voltage detection circuit; if yes, the foot voltage control switch is switched on, the under-voltage control switch is not switched on, and an external power supply supplies power to the detector detection part; if the voltage is lower than the threshold value, the undervoltage control switch is conducted and the foot voltage control switch is not conducted, the energy storage unit charging and discharging management circuit supplies power to the energy storage voltage detection circuit to enable the energy storage unit power supply control switch to be conducted, and the power is transmitted to the detector detection component through the power supply management circuit for automatic compensation power supply; and if the external power supply is not switched on, the external power supply control switch is not switched on, and the energy storage unit does not self-discharge to supply power to the sensing unit of the detector detection part. According to the invention, automatic compensation when power supply of the detector detection part is insufficient is realized.

The invention discloses a lithium ion battery self-discharge evaluation method. The method comprises the following steps: S1, manufacturing a plurality of metal impurity single batteries and a plurality of control group single batteries; s2, executing a multi-step aging process on each metal impurity single cell and a control group single cell, and checking the timeliness of metal precipitation in each aging process; obtaining the voltage drop rate of each metal impurity single cell and the control group single cell; s3, comparing the voltage drop rate of each metal impurity single cell with a reference standard of a control group; and if yes, judging the battery as a bad battery. On the basis of the characteristics of simple structure, low cost and easy operation of a single battery, in combination with accurate regulation and control of high-SOC interval charge-discharge cycle, high-temperature aging and normal-temperature aging processes and in combination with disassembly of the single battery to detect the timeliness of metal precipitation in each stage, metal impurities introduced in the production process of the lithium ion battery are fully dissolved, and the production efficiency of the lithium ion battery is improved. The problem that metal impurities are difficult to screen out is solved.

Control, assessment and optimization techniques for manufacturing secondary electrochemical devices to improve the quality, throughput, and safety of cells produced and to facilitate the finishing (formation / aging / sorting / grading) process. A system for dynamic control and optimization of secondary battery finishing process includes a closed-loop process control module that is configured to process real-time in-line manufacturing data derived from at least one of electrochemical impedance spectroscopy (EIS), self-discharge analysis (SDA), amperometric, or potentiometric battery measurements. Cell formation can be reduced from the several days with prior art technology to less than 24 hours, and aging can be reduced from 2-3 weeks to less than an hour. A control module provides real-time feedback to predecessor operations / materials for confirmations, refinements, corrections, and / or recognition or isolation of better / worse performance characteristics. It also provides feedforward information of aspects recognized that may indicate performance deviations from the norm.

The invention discloses a lithium ion battery positive electrode based on a composite positive electrode active material and a preparation method and application thereof, and relates to the technical field of lithium ion batteries. The composite positive electrode active material comprises the following components: LiMnXFe1-XPO4 (X is greater than or equal to 0.4 and less than or equal to 0.6), LiMn2O4, LiNi0. 8Co0. 1Mn0. 1O2, Li2Al2B2O7 and an LLTO / LLZO composite material. According to the invention, LiMnXFe1-XPO4 and LiMn2O4 are taken as main materials, and various positive electrode active materials such as LiNi0. 8Co0. 1Mn0. 1O2, Li2Al2B2O7 and LLTO / LLZO are compounded to construct a positive electrode active material component. In the use process of the battery, multiple positive electrode active materials are combined for use, so that ion conduction can be improved, internal polarization of the battery can be reduced, Mn < 2 + > dissolution can be inhibited, a positive electrode CEI membrane can be optimized, the effect of reducing self-discharge can be achieved, and the stability of high-temperature circulation can be synchronously optimized.

The invention relates to the technical field of battery detection, in particular to a lithium battery self-discharge detection method, system and equipment. According to the detection method, firstly, feature extraction is carried out on formation data of a to-be-detected sample to obtain a feature set of a to-be-detected sample set, then physical self-discharge detection is carried out on the feature set of the to-be-detected sample set through a physical self-discharge cell detection model, and after first abnormal cell data and first cell data are output, the first abnormal cell data and the second abnormal cell data are obtained. Carrying out chemical self-discharge detection on the first battery cell data through a chemical self-discharge battery cell detection model, outputting second abnormal battery cell data and normal battery cell data, and taking the battery cell corresponding to the first abnormal battery cell data and the second abnormal battery cell data as an abnormal battery cell through the above detection. And finally outputting the battery cell corresponding to the normal battery cell data. According to the scheme, different types of abnormal battery cells can be accurately distinguished, and the detection precision of the abnormal battery cells is effectively improved.

The invention provides a lithium ion secondary battery and a power utilization device, the lithium ion secondary battery comprises a positive pole piece, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the coating surface density of the positive film layer on one side is 20 mg / cm < 2 >-30 mg / cm < 2 >, the positive film layer comprises lithium-containing phosphate and a polyacrylate binder, and the coating surface density of the positive film layer on the other side is 20 mg / cm < 2 >-30 mg / cm < 2 >. The weight-average molecular weight of the polyacrylate binder is 80000-130000 Daltons, and the compaction density of the positive pole piece is 2.45-2.55 g / cm < 3 >. By adopting the polyacrylate binder with the weight-average molecular weight, a good bonding effect on lithium-containing phosphate in the positive electrode film layer can be achieved under the condition that the coating surface density of the positive electrode film layer is relatively large and the compaction density is relatively large, so that the positive electrode plate has relatively high bonding force and cohesive force, the problem of powder falling of the positive electrode film layer is effectively improved, and the service life of the positive electrode plate is prolonged. The self-discharge of the battery is reduced.

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 provides a battery cell self-discharge anomaly detection method and related equipment, and relates to the technical field of energy storage. The method comprises the following steps: acquiring operation data of a single battery in a preset time period; determining a plurality of battery standing intervals and initial voltage values and end voltage values of the battery monomers in each battery standing interval according to the operation data of the battery monomers in the preset time period; according to the initial voltage value, the end voltage value and a preset OCV-SOC relation curve, determining an initial charge state and an end charge state of the battery monomers, and calculating a charge state difference value of the battery monomers in each battery standing interval; calculating the self-discharge coefficient of the single battery; and according to a relationship between the self-discharge coefficient and a preset self-discharge coefficient threshold value, carrying out self-discharge anomaly detection on the single battery.

The invention discloses a method for measuring the internal resistance and the self-discharge rate of a battery through a battery impedance chip. The method comprises the steps that S1, the battery is connected with the impedance chip; s2, initializing the system; s3, applying an excitation signal; s4, signal acquisition; s5, internal resistance calculation; s6, calculating the self-discharge rate; and S7, data analysis and storage. According to the method, rapid and accurate measurement of the internal resistance of the battery is realized, so that an effective technical means is provided for real-time evaluation of the health state of the battery.