177 results about "Capacity loss" patented technology

The invention discloses a battery capacity loss real-time prediction method based on Arrhenius-LSTM, and the method comprises the steps: S1, collecting the current, voltage, state of charge and temperature data of a vehicle-mounted battery management system, and generating an original time series data set; s2, performing time alignment and capacity calculation on the original time sequence data set to generate a capacity loss sequence; s3, an Arrhenius Arrhenius model is constructed based on the capacity loss sequence, and a physical baseline prediction sequence is generated through temperature related parameter estimation; s4, calculating a difference value between the capacity loss sequence and the physical baseline prediction sequence, and generating a residual sequence; s5, performing feature extraction and time sequence window construction on the residual error sequence to generate an LSTM training data set; s6, inputting the LSTM training data set into the long short-term memory network for training, and generating a residual prediction model; and S7, adding the physical baseline prediction sequence and the output of the residual prediction model to generate a capacity loss prediction result. And the online monitoring and early warning functions of the health state of the battery are realized.

The invention belongs to the technical field of battery material synthesis, and discloses a sodium ion battery hard carbon negative electrode material, a preparation method of the sodium ion battery hard carbon negative electrode material, a negative electrode and a sodium ion battery. Unsaturated oxygen-containing sites of the hard carbon material are eliminated through calcination under the low-temperature (500-700 DEG C) condition, and the first-circle irreversible capacity loss is reduced; meanwhile, a sodium polyphosphate coating layer is formed in situ, so that the diffusion rate of sodium ions is increased. According to the method, surface modification and coating of the hard carbon material are achieved in one step, the first-week coulombic efficiency of the obtained hard carbon negative electrode material is larger than 89.4%, and the capacity retention rate gt after 200 times of circulation under 200 mA. G <-1 > is achieved; and the rate capability is excellent. The method is simple and controllable in process, low in raw material cost, environment-friendly and suitable for large-scale production.

The invention provides a sulfinate organic positive alkali metal ion supplement for a secondary battery, and relates to the technical field of secondary batteries. The organic positive electrode alkali metal ion supplement has a structure as shown in the following general formula: [R-SO2]-M < + >, wherein M < + > is a metal cation and is selected from at least one of Li < + >, Na < + > and K < + >; [R-SO2]-is a sulfinate anion, and wherein R is an organic group. The supplement compensates irreversible capacity loss by efficiently releasing active ions, so that the energy density of the battery is improved; the oxidation potential is proper, the environmental stability is excellent, and the catalyst is not needed to decompose and easy to process; decomposition products are harmless, an electrode interface can be optimized, and the cycle life of the battery is remarkably prolonged.

The invention belongs to the technical field of preparation of sodium ion battery electrode materials, and provides a high-performance sodium storage material based on Zn-doped modified P2 type sodium nickel manganese oxide, a preparation method and a battery. The invention aims to solve the problems of rapid capacity attenuation under high voltage, obvious volume change in the phase change process, irreversible capacity loss and the like of the existing P2 type sodium nickel manganese oxide material. According to the main technical scheme, through low-concentration Zn doping, the structural stability of the material is optimized, and the electrochemical performance of the material is improved on the premise that voltage, capacity and energy density are not sacrificed. The preparation method comprises the following steps: dissolving a sodium source, a manganese source, a nickel source and a zinc source, adding a complexing agent for reaction, evaporating the solvent to dryness, and performing two-stage calcination to finally obtain the zinc-doped sodium-nickel-manganese oxide with the P2 type layered structure. The material can be used for high-safety sodium ion battery positive electrodes and is widely applied to the fields of energy storage power stations, low-speed electric vehicles and the like.

The invention discloses a ternary positive electrode material as well as a preparation method and application thereof, and belongs to the technical field of lithium ion batteries. The method comprises the following steps: modifying a ternary matrix material in a composite doping manner of rare earth elements and transition metals, and then coating the surface of the material with a layer of amorphous ferric fluoride in a manner of combining atomic layer deposition with fluorination reaction. The ternary positive electrode material provided by the invention has higher rate capability and better cycling stability, and can maintain better chemical performance under high current density, so that the problems of capacity loss and poor electrical performance of the ternary positive electrode material of the lithium battery in a high-voltage long-cycle process are greatly relieved.

The invention provides a method suitable for rapidly evaluating the aging state of a large-scale energy storage power station battery, and belongs to the technical field of battery state evaluation. According to the method, data acquisition is carried out during battery standing, two subsequent interval voltages of standing initial voltage are recorded, equivalent capacity loss instantaneous values at different moments are calculated in combination with a calibration proportionality coefficient and a working condition correction factor, a voltage relaxation integral area is obtained through calculation, and then a health state assessment result and confidence are obtained; the technical means of synchronously collecting the temperature change rate and the internal resistance change value, dynamically allocating weight fusion calculation, and performing evaluation in parallel in the whole station to generate an aging state distribution diagram and an abnormal alarm are adopted, and the method is adaptive to an existing energy storage power station monitoring system, does not need additional transformation, avoids voltage fluctuation to obtain high-quality data, comprehensively represents the battery polarization state, and improves the quality of the battery. The problems that large-scale energy storage power station battery evaluation is low in efficiency, insufficient in precision and lack of a global view angle are solved.

The invention belongs to the field of lithium ion batteries, and discloses a ZIF-67-derived composite lithium oxalate lithium supplement agent and a preparation method and application thereof.The lithium supplement agent comprises a lithium oxalate matrix and a ZIF-67-derived Co-based catalyst, and the ZIF-67-derived Co-based catalyst is evenly distributed on the surfaces of lithium oxalate particles or among crystals to form a composite structure; a water-phase synthesis method is adopted for preparation, ZIF-67 is converted into Co-based nano-particles, the Co-based nano-particles and lithium oxalate particles form a composite structure, the Co-based nano-particles can serve as a positive electrode additive to be applied to a positive electrode of a lithium ion battery, in-situ thermal decomposition / electrolytic reaction occurs in the first charging process of the battery, Li is released to compensate irreversible capacity loss, the decomposition potential can be reduced to 4.0 V or below, and the positive electrode additive can be applied to the positive electrode of the lithium ion battery. The first-time charging efficiency is improved to 90% or above, and the cycling stability is remarkably enhanced.

The invention discloses a niobium-doped and carbon nanotube continuously coated lithium iron nickel phosphate material and a preparation method thereof, and belongs to the technical field of lithium ion battery positive electrode materials. The niobium source and the phosphorus source are added step by step, the concentration gradient distribution of the niobium element in the material is realized, and niobium is preferentially doped in the [100] crystal orientation through three-section temperature control sintering, so that the bulk phase conductivity and the lithium ion mobility are remarkably improved, and the capacity loss caused by excessive doping is avoided while the lattice structure is stabilized. In addition, the carbon nanotubes and the nitrogen-containing carbon source have a synergistic effect, Li-N-C covalent bonds are formed on the surface of the material, the interface stability is enhanced, the interface side reaction is effectively inhibited, and the surface conductivity is improved. According to the method, through double modification of doping and coating, the problems of low conductivity and poor cycling stability of the lithium iron nickel phosphate material are successfully solved, and the final product shows excellent rate capability and long cycle life.

The invention relates to the technical field of lithium / sodium ion batteries, in particular to a modified current collector, a preparation method of the modified current collector and a negative-electrode-free secondary battery, the modified current collector comprises a porous metal substrate layer; the deposition layer is formed in the porous metal substrate layer, the deposition layer is formed in the porous metal substrate layer through magnetron sputtering of metal Bi or metal Ag or metal Sn or alloy BiAg or alloy BiSn or alloy BiAgSn, and the deposition layer serves as the negative electrode current collector of the negative electrode-free lithium battery or the negative electrode current collector of the negative electrode-free sodium battery. Volume expansion caused by lithium / sodium deposition can be relieved, generation of dendritic crystals in the circulation process is avoided, the reversibility of lithium / sodium metal deposition / stripping is improved, capacity loss in the circulation process is reduced, the cycle life of the battery is prolonged, and the safety performance of the battery is improved.

The invention provides a lithium supplement functional diaphragm, a lithium ion battery and a preparation method of the lithium ion battery, and relates to the technical field of lithium ion batteries. The lithium-supplementing functional diaphragm comprises a diaphragm base material and a lithium-supplementing agent functional layer coated on at least one surface of the diaphragm base material, wherein the lithium-supplementing agent functional layer comprises a lithium-supplementing agent, a conductive coating layer and a binder; wherein the conductive coating layer coats the outer surfaces of the lithium supplement agent particles and is used for improving the electronic conductivity and environmental stability of the lithium supplement agent; and moreover, the lithium supplement agent functional layer is configured to be decomposed when the battery is charged and formed for the first time, and released lithium ions migrate to the negative electrode to compensate irreversible capacity loss. The conductive coating layer can effectively isolate moisture and carbon dioxide in air from being in contact with the core of the lithium supplement agent, so that the environmental stability of the lithium supplement agent is enhanced, and the storage and transportation conditions are simplified. The lithium supplementing agent functional layer fundamentally avoids the failure problem of the lithium supplementing agent in the positive electrode slurry preparation and pole piece storage process, and the feasibility and yield of industrial production are greatly improved.

The invention provides a lithium ion battery negative electrode material as well as a preparation method and application thereof. The lithium ion battery negative electrode material is a porous silicon carbon material coated with lithium phosphate. The preparation method is simple and efficient, lithium phosphate salt is uniformly distributed on the surface of the porous silicon carbon material through solvent wet coating, the lithium phosphate salt is decomposed into LiF and LixPyOz through sintering and heating, and LiF and LixPyOz coating layers are generated in situ on the surface of the porous silicon carbon negative electrode material of the lithium ion battery, so that the porous silicon carbon material uniformly coated with LiF and LixPyOz is obtained, the advantages of LiF and LixPyOz are combined, and the porous silicon carbon material has the advantages that the porous silicon carbon material can be used for preparing the lithium ion battery negative electrode material through cooperation of LiF and LixPyOz; the silicon-carbon material prepared by the method has the characteristics of high strength, high stability and high ionic conductivity, can effectively inhibit volume expansion of the silicon-carbon material in the charge-discharge process, block penetration of electrons and reduce capacity loss of the silicon-carbon material in the reaction process, is used for manufacturing a lithium ion battery and remarkably improves the cycling stability of the battery.

The invention relates to the technical field of solid-state storage, in particular to a dynamic fault tolerance and replacement system and method for bad blocks of a flash memory. Compared with the prior art, through dynamic migration and global scheduling, prediction maintenance, cross-Die cooperation and a system-level fault-tolerant mechanism, the reliability of the Ink Die storage system is remarkably improved, the bad block replacement efficiency is improved by 40%, the burst failure rate is reduced by 60%, and the data loss risk is reduced; passive replacement operation is reduced by 50% for predictive maintenance, the service life of equipment is prolonged by a cross-Die spare block sharing mechanism, storage resource allocation is optimized, and storage capacity loss is reduced by 25%; according to the collaborative design of RAID and bad block management, the system complexity is reduced, a lightweight end-to-end fault-tolerant scheme is formed, and a better solution is provided for high-reliability storage requirements.

The invention provides a preparation method of a silicon-carbon lithium ion battery and lithium compound solid-state lithium battery, and belongs to the technical field of new energy lithium battery preparation. Aiming at the problems of low energy density, short cycle life and easy thermal runaway of a conventional lithium ion battery and capacity loss caused by cyclic pulverization of a silicon material, the method comprises the following steps: adding 1-80% of silicon powder into a negative electrode base material to improve the energy density of a negative electrode, and spraying 0.1-800% of a lithium compound on a negative electrode plate to supplement cyclic lithium loss. And a solid gel electrolyte (low-temperature injection, normal-temperature infiltration and high-temperature curing) is matched to coat the pole piece. The prepared battery has significantly improved capacity and cycle life, can inhibit short-circuit thermal runaway, has high safety, and is suitable for new energy automobile power batteries, energy storage equipment and other scenes.

This invention relates to a sodium-supplementing material capable of simultaneously replenishing active sodium and sodium hexafluorophosphate, and its preparation and application. The sodium-supplementing material comprises the following raw material components by weight percentage: 10-50% elemental phosphorus, 50-90% sodium fluoride, and 1-5% Ketjen Black. Compared with existing technologies, the phosphorus-based bifunctional sodium-supplementing separator and sodium-supplementing cathode provided by this invention not only possess higher theoretical capacity, effectively compensating for irreversible capacity loss during the first cycle of the battery, but also generate NaPF6 in situ under electrochemical conditions through the synergistic reaction of red phosphorus and sodium fluoride, achieving simultaneous replenishment of active sodium and electrolyte sodium salts, thereby improving the initial coulombic efficiency and long-term cycle performance of the battery.

The invention provides a pre-lithiation silicon-based negative pole piece, a pre-lithiation method and a lithium ion battery, and particularly relates to the technical field of lithium batteries. The pre-lithiation method comprises the following steps: providing a silicon-based negative pole piece; forming a metal lithium film on the surface of the silicon-based negative pole piece; carrying out segmented isostatic pressing on the silicon-based negative pole piece with the metal lithium film formed on the surface so as to carry out pre-lithiation on the silicon-based negative pole piece; wherein the step of segmented isostatic pressing comprises the following substeps: applying a pressure of 200-500MPa to the silicon-based negative pole piece with the metal lithium film formed on the surface, and keeping the pressure for 0.5-5 minutes; and then the pressure is reduced to 50 MPa to 200 MPa, and the pressure is kept for 1 min to 6 h. According to the pre-lithiation method, the metal lithium can be quickly and uniformly pressed into and diffused into the silicon-based pole piece, the reaction of lithium and silicon is accelerated to realize thorough and uniform pre-lithiation, the longitudinal expansion of the silicon-based negative pole is inhibited and the transverse expansion of particles is guided while the first irreversible capacity loss is effectively compensated, so that the secondary irreversible capacity loss is effectively compensated. The density and the mechanical stability of the pole piece are improved.

The disclosure herein pertains to a pressure regulation system for use in a silicon dominate anode lithium-ion cell. The pressure regulation system regulates a lifetime pressure on the lithium-ion cell in order to correct for capacity loss and mechanical failure due the expansion of silicon during operation. The pressure regulation system along with a housing maintains a certain pressure range on the lithium-ion cells during the cycling and the operational life of the energy storage device.

Various embodiments of the teachings herein include a method for ascertaining at least one average capacity loss of a battery storage device. The method may include: measuring at least two load cycles of the battery storage device using a high precision coulometry apparatus; determining a first charge displacement and a second charge displacement; determining a capacity loss equal to the difference between the first charge displacement and the second charge displacement; repeatedly measuring load cycles until the capacity loss is almost constant in at least two consecutive load cycles; and ascertaining an average capacity loss based on at least two capacity losses.

This invention provides an anode material, its preparation method, and its application. The anode material includes a silicon-carbon material and a modified coating layer covering the surface of the silicon-carbon material. The silicon-carbon material includes a core and a carbon layer covering the surface of the core. The core includes porous carbon and silicon deposited in the pores of the porous carbon. The modified coating layer, in the direction away from the silicon-carbon material, sequentially includes a first coating layer and a second coating layer. The first coating layer is made of tin and tin sulfide, and the second coating layer is made of a tin-modified sulfide solid electrolyte. Tin compensates for irreversible capacity loss and improves first-time efficiency. Tin and tin sulfide have high ionic conductivity, and the "point-to-surface" conductive network formed by tin and the carbon layer can significantly reduce interfacial resistance. The plasticity of the tin-modified sulfide solid electrolyte itself can optimize the interfacial contact between the anode and the electrolyte, reduce interfacial impedance, and buffer the volume expansion stress of the silicon material during charging and discharging. The synergistic effect of the above structures can effectively suppress the volume expansion of the silicon material.

The invention discloses a preparation method of a boron-based magnesium salt and alcohol / phenol magnesium additive composite magnesium salt electrolyte, and relates to the technical field of magnesium ion batteries, and the preparation method comprises the following steps: S1, in an inert atmosphere or an air environment, dissolving / dispersing a magnesium source in an organic solvent, and stirring to obtain a solution a; s2, adding alcohol or phenol into the solution a, and reacting to obtain a solution b; s3, performing post-treatment on the solution b to obtain alcohol magnesium salt or phenol magnesium salt crystals; and S4, co-dissolving alcohol magnesium salt or phenol magnesium salt and fluorine-containing alkoxy magnesium borate in an ether solvent according to a molar ratio of 1: (3-100) to form the composite magnesium salt electrolyte. According to the magnesium battery using the electrolyte, the cycle life can be prolonged by 20%-100%, the actual service cycle of the battery is prolonged, the coulombic efficiency is improved to 97%-99.5%, irreversible capacity loss in the charging and discharging process is reduced, the energy utilization efficiency is improved, the oxidation potential is improved by 0.2-0.5 V compared with that of a traditional electrolyte, the stability and oxidation resistance of the electrolyte are enhanced, and the service life of the magnesium battery is prolonged. And the working voltage window of the battery is widened.

The present invention provides a battery-type lithium-ion capacitor and an electronic device. The battery-type lithium-ion capacitor comprises a negative electrode sheet. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active layer provided on at least one surface of the negative electrode current collector. The negative electrode active layer comprises a negative electrode active material, and the negative electrode active material comprises hard carbon and graphite. In the negative electrode active material, the mass percentage of graphite is 2-45%. In the present invention, the graphite in the negative electrode sheet can reduce the consumption of lithium ions by the battery-type lithium-ion capacitor when charging and discharging for the first time, which, overall, improves the efficiency of the battery-type lithium-ion capacitor during charging and discharging for the first time, reduces capacity loss of the battery-type lithium-ion capacitor during charging and discharging, and increases the energy density of the battery-type lithium-ion capacitor.

The application belongs to the technical field of battery material synthesis, and discloses a sodium-ion battery hard carbon negative electrode material and a preparation method, a negative electrode and a sodium-ion battery. The method uniformly mixes the hard carbon negative electrode material and a sodium polyphosphate precursor material composed of a sodium source and a phosphorus source, and eliminates the unsaturated oxygen-containing sites of the hard carbon material under low-temperature (500-700 DEG C) calcination to reduce the first-cycle irreversible capacity loss. Meanwhile, an in-situ formed sodium polyphosphate coating layer improves the sodium ion diffusion rate. The method realizes the surface modification and coating of the hard carbon material in one step, the obtained hard carbon negative electrode material has a first-week coulomb efficiency of >89.4%, a 200 mA·g ‑1 cycle capacity retention rate of >90%, and excellent rate performance. The application has simple and controllable process, low raw material cost and environmental friendliness, and is suitable for large-scale production.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a low-temperature formation method of a lithium ion battery based on a coal-based negative electrode material, which comprises the following steps of: (1) preparing negative electrode slurry by taking the coal-based negative electrode material as a main raw material, coating the negative electrode slurry on a negative electrode current collector, and rolling to obtain a negative electrode plate; wherein the range of the interplanar spacing of the coal-based negative electrode material is 0.337 to 0.339 nm; (2) preparing positive electrode slurry by taking the lithium iron phosphate powder material as a main raw material, coating the positive electrode slurry on a negative electrode current collector, and rolling to obtain a positive electrode piece; (3) assembling the prepared positive pole piece and the prepared negative pole piece, and injecting electrolyte; (4) charging the whole battery at-20 DEG C, and then discharging the battery at normal temperature; and (5) aging the formed battery at the temperature of 40-45 DEG C. According to the method disclosed by the invention, the capacity loss of the total battery in the cycle process can be reduced, so that the total battery has excellent cycle performance.

The invention provides a charging control method and device, electronic equipment, a storage medium and a program product. The method comprises the following steps: repeatedly executing simulation processing for N times to obtain N first charging current distributions; the simulation processing comprises the following steps: carrying out charging and discharging simulation according to the A charging current distributions and the battery performance parameters to obtain charging time and capacity loss corresponding to the A charging current distributions; according to the charging time and the capacity loss corresponding to the A charging current distributions, using an optimization algorithm to obtain a first charging current distribution corresponding to the minimum value of the objective function; the objective function is an optimization objective of the optimization algorithm, and the optimization objective is related to the charging time and the capacity loss; and according to the N first charging current distributions, establishing charging current distributions of the battery in different life stages, and based on the charging current distributions in different life stages, performing battery charging control. According to the scheme, the accuracy of optimizing the charging current distribution can be improved.

The invention discloses a lithium ion battery capacity fading quantitative analysis method, which comprises the following steps: taking a fresh total battery and a used total battery, carrying out charge and discharge test, and recording the discharge capacity of the fresh total battery and the used total battery; based on the discharge capacity of the fresh total battery and the discharge capacity of the used total battery, calculating the theoretical gram capacity of the fresh button battery and the used button battery, and calculating the total capacity loss of the battery according to the theoretical gram capacity of the fresh button battery and the used button battery; manufacturing a button cell, and carrying out charge and discharge tests on the fresh and used positive button cells to obtain the charge gram volume and the discharge gram volume of the fresh and used button cells; and calculating the reversible capacity loss, the lithium-lacking capacity loss and the structural capacity loss of the battery based on the theoretical gram capacity, the charging gram capacity and the discharging gram capacity of the fresh button battery and the used button battery. The proportions of reversible loss, lithium loss and structure loss in the battery capacity loss after use are distinguished, and clear guidance is provided for design optimization of a material system.

The application relates to the technical field of direct-current power sources of power systems, in particular to a lead-acid storage battery pack online activation method and system, wherein the method comprises the following steps: monitoring each single battery and identifying low-capacity batteries, sorting the low-capacity batteries according to capacity loss rates to form an activation queue; starting activation in a floating state, connecting a bypass loop in parallel with a target battery to be activated, controlling the load current of the target battery through current gradual change and compensating the bus voltage; performing cyclic activation of controlled discharge and controlled charge on the target battery, feeding back the discharge energy to the bus through a bidirectional converter, and charging in constant-current, constant-voltage and floating stages; according to the capacity recovery rate after activation, if the capacity recovery rate does not reach a set value, performing multi-stage cyclic activation on the target battery; if the capacity recovery rate reaches the set value, performing pre-charge equalization on the target battery, exiting the bypass in a current gradual change mode, restoring the series connection of the target battery and the storage battery pack, and then activating the next battery in the activation queue as a new target battery.

The invention relates to the technical field of battery energy storage systems, and discloses a battery management method, device and equipment of a battery energy storage system, a medium and a product, and the battery management method of the battery energy storage system comprises the steps: carrying out the real-time analysis of the circulation aging capacity loss of a plurality of energy storage batteries according to the real-time battery operation data, and obtaining the circulation aging capacity loss amount; according to the real-time environment original data and the battery operation data, performing real-time analysis on the calendar capacity loss of each energy storage battery to obtain a calendar capacity loss amount; determining real-time residual capacity according to the initial capacity, the cyclic aging capacity and the calendar capacity loss amount; according to the real-time residual capacity, the energy storage battery parameters and the decision variables, an objective function and constraint conditions are constructed; according to the objective function and the constraint condition, the decision variable is solved, and an energy storage battery management scheme is obtained.According to the method, the accuracy of the residual capacity is improved by analyzing various capacity losses of the battery, and therefore the accuracy of battery management is improved.

The invention provides an energy storage capacity attenuation modeling method based on multi-stress coupling, and the method specifically comprises the steps: single stress model modeling: firstly, decomposing a multi-source working condition into three single channels, namely temperature stress, state-of-charge stress and discharge depth, and respectively depicting the marginal influence on capacity degradation; an identifiable parameter set is formed under a unified statistical caliber and is used as the input of subsequent coupling and aggregation; semi-empirical model modeling: adopting a parallel aggregation framework of calendar aging-cyclic aging-total degradation to construct a computable life attenuation model with a unified metering caliber; the nonlinear degradation dynamics and partition expression comprises the following steps of: firstly, normalizing capacity loss according to rated capacity, and recording a life state as L belonging to [0, 1]; according to the method, multi-stress coupling and stages are accurately described, model parameters can be identified, and single-cycle decomposition is easy to embed in engineering, so that the re-calibration cost is reduced; model output supports rolling evaluation and strategy comparison and selection.

The invention provides a battery monomer, a battery device and a power utilization device, an electrode assembly in the battery monomer comprises a pole piece and an insulating part, and a current collection main body in the pole piece comprises two first surfaces which are oppositely arranged along the thickness direction of the pole piece and a first end surface which is connected with the two first surfaces; the insulating part is connected to the pole piece and partially covers the active material layer arranged on the first surface, at least part of the first end face is coated with the insulating part, and the insulating part has ionic conductivity. The insulating part can cover the first surface between the first surfaces connected with the two sides of the current collecting main body, so that burrs on the first end surface are covered, the risk that the burrs pierce the separator in the battery monomer is reduced, the possibility of short circuit in the battery monomer is reduced, and the reliability of the battery device is improved; as the insulating part has ionic conductivity, lithium ions can smoothly penetrate through the insulating part, so that the insulating part is not easy to cause capacity loss and lithium precipitation risk to the single battery when covering the active material layer.

The invention relates to a lithium ion battery life prediction method and system based on a state space model. The method comprises the steps of obtaining characteristic parameters of a to-be-predicted battery and performing preprocessing; inputting the preprocessed characteristic parameters into a pre-constructed prediction model to obtain a capacity loss prediction sequence; the training process of the prediction model comprises the following steps: collecting charge-discharge cycle data of the lithium ion battery and preprocessing the charge-discharge cycle data to obtain multi-dimensional input features; performing feature conversion to obtain an embedded vector, and dividing the embedded vector into a current group and a voltage group; based on the intra-group variable weight and the inter-group variable weight, generating an aggregation feature and a battery internal capacity state variable; generating a time sequence characteristic signal based on the internal capacity state variable of the battery; performing element-by-element multiplication fusion on the time sequence characteristic signal and the original gating signal to obtain a time sequence characteristic vector for prediction; and updating the prediction model based on the capacity loss prediction result. Compared with the prior art, the method has the advantage that the prediction result conforms to the physical law.

The invention discloses a charging and swapping station double-layer optimization method and system considering the service life of a heterogeneous battery, and the method comprises the steps: carrying out the modeling of a charging and swapping station based on the working mode of the charging and swapping station in reality, and constructing a charging and swapping station model based on a swapping reservation; markov decision process modeling is carried out based on the charging and battery swap station model of the battery swap reservation, and reinforcement learning training is carried out by introducing a delay update mechanism and target strategy smoothing to obtain an optimal execution strategy of a charging and battery swap station agent; and based on the optimal execution strategy of the charging and swapping station intelligent agent, solving is carried out through an event triggering dynamic constraint rolling optimization method, and the energy flow optimization of the charging and swapping station is realized. According to the method, the service life of the in-station battery is prolonged through the dual goals of capacity loss and minimum SOH variance of the battery. The charging and battery swap station double-layer optimization method and system considering the service life of the heterogeneous battery can be widely applied to the technical field of power station charging and battery swap.