486results about How to "Improve energy storage efficiency" patented technology

The present invention relates to an energy resource-grid-load automatic control system of smart microgrid and control methods thereof, which belong to the field of microgrid control and electrical technology. The energy resource-grid-load automatic control system comprises a distributed renewable energy power generation module, a distributed renewable energy inverter module, a conventional power generation module, a user load module, a bidirectional grid-connected control module, a distributed renewable energy intelligent optimizing power generation control module, an energy storage module, an intelligent energy storage unit adjuster and a storage battery pack. Compared with the conventional microgrid comprising a distributed renewable energy power generation system, the present invention guarantees the stability and the high energy utilization of the power generation system and effectively solves the problem of non-uniform frequency of use of storage batteries to unify the service life of the storage battery pack.

An energy storage gas-turbine electric power generating system includes a liquid air storage tank for storing liquid air, a vaporizing facility for vaporizing the liquid air stored in the liquid air storage tank, a combustor for generating a combusted gas by combusting the air vaporized by the vaporizing facility and a fuel, a gas turbine driven by the combusted gas generated in the combustor, and a gas-turbine generator connected to the gas turbine for generating electric power. The system further includes a pressurizing unit for pressurizing the liquid air stored in the liquid air storage tank up to a pressure higher than a pressure of air supplied to the combustor to supply the liquid air to the vaporizing facility, an expansion turbine driven by expanding the air vaporized by the vaporizing facility and an expansion-turbine generator connected to the expansion turbine for generating electric power.

The invention discloses a supercritical air energy storage / release system with a novel process. The off-peak (low price) electricity of the power station is adopted by the system to compress the air to a supercritical state (simultaneously store the heat of compression), an expansion machine is utilized to cool the air, simultaneously the work of expansion is recycled to drive a first-stage compressor to improve the system efficiency, and the stored cold energy is utilized to cool, liquefy and store (store the energy) the supercritical air; at a peak of electricity consumption, the liquid air is compressed and absorbs heat to be supercritical (simultaneously recycles the cold energy), further after absorbing the compression heat or the other industrial exhaust heat, the solar energy central heating and the like, the liquid air drives the generator to generate electricity (release energy) through a turbine. The supercritical air energy storage system disclosed by the invention has the advantages of having high energy density and high efficiency, being free from limitation of the energy storage period and the geography condition, being suitable for a variety of power stations (including regenerative energy power stations such as wind energy), being environment-friendly, being capable of recycling the middle-low temperature (heat value) waste heat, and the like.

The invention relates to a flywheel array energy storage system with flywheel energy storage units connected in parallel, which consists of a public direct current bus, a grid-connected static switch, a brake resistor, a flywheel array controller and at least two or more flywheel energy storage units and unit controllers thereof, wherein the internal structures and parameter features of the flywheel energy storage units are identical. Each flywheel energy storage unit is connected into the public direct current bus in a current source mode, and the number of the connected units can be increased and decreased casually. A master-slave control mode is adopted in the flywheel array energy storage system disclosed by the invention, power needed for maintaining direct current power grid power balance is computed by the flywheel array controller used as a master controller, and the power is distributed to each flywheel energy storage unit controller by a coordination control algorithm; and a bi-directional power conversion circuit and a permanent magnet synchronous motor are controlled by the unit controller used as a slave controller according to the obtained power instruction in a flywheel energy storage unit control method to absorb or release power to a direct current power grid.

The invention provides phase-change energy storage heat-insulation solid wood. The wood comprises a solid wood component, wherein magnetic Fe3O4 nanoparticles are formed in a conduit and a cell cavity of the solid wood component through in-situ attached growth, and the conduit and the cell cavity are filled with composite phase-change energy storage materials of polyethylene glycol 600 and polyethylene glycol 800; and a protective coating is painted on the surface of the heat-insulation solid wood. The heat-insulation solid wood is capable of absorbing heat to withstand excessive rise of an indoor temperature during the day, releasing phase-change latent heat for thermal retention and cold dispelling during the night, and maintaining a human body within a comfort temperature range. The invention further provides a manufacturing method of the heat-insulation solid wood. The method comprises the steps of firstly processing the solid wood component according to the required dimension; carrying out degreasing and drying pretreatment on the solid wood component, forming the magnetic Fe3O4 nanoparticles in the solid wood component through in-situ attached growth and then impregnating and filling the composite phase-change energy storage material of the polyethylene glycol 600 and the polyethylene glycol 800; and finally carrying out sanding shaping and painting the protecting coating. According to the manufacturing method, the process is simple and the cost is low.

The invention provides a compressed air electric power energy storage system achieving hydraulic and pneumatic coupling. According to the compressed air electric power energy storage system, in the electric valley period, a compressor unit compresses air into a constant-pressure air storage device, liquid in the constant voltage air storage device is compressed into a variable-pressure air storage device through a liquid pump, and accordingly electric energy is converted to air and liquid internal energy for storage; in the electric peak period, heat of high-pressure air in the constant-pressure air storage device is absorbed through a heater, an expansion machine drives an electric generator to generate electricity, high-pressure fluid in the variable-pressure air storage device drives a hydraulic motor generator set to generate electricity, and the fluid is injected into the constant-pressure air storage device to keep constant pressure of the constant-pressure air storage device. The energy storage period of the compressed air electric power energy storage system is not limited, and the compressed air electric power energy storage system is suitable for power sources of various types and environmentally friendly, and has wide use prospects.

The present invention discloses a magnetic suspension flywheel battery for a sandwich-type electric car and a work method thereof. A vertical rotation shaft is arranged at the center of the internal portion of a vacuum chamber, a disc-type flywheel motor is coaxially arranged at the center of the axial direction of the vertical rotation shaft, disc-type magnetic bearings having the same structure, being arranged at the axial direction in the longitudinal symmetry mode relative to the disc-type flywheel motor and being sleeved at the outer portion of the vertical rotation shaft are coaxially arranged at the upper portion and the lower portion of the disc-type flywheel motor, and each disc-type magnetic bearing is wound with a set of radial control coils; the disc-type flywheel motor is composed of a stator, two rotors and two sets of permanent magnets, the stator is located at the center of the disc-type flywheel motor and coaxially arranged at the outer portion of the vertical rotation shaft, and the two rotors are respectively and symmetrically arranged at upper and lower sides of the stator and coaxially and fixedly sleeved on the vertical rotation shaft; and the two sets of the permanent magnets are respectively pasted on the surfaces, back to the stator, of the two rotors along the peripheral directions, the whole structure of the flywheel battery is a disc-type structure, the disc-type magnetic bearings and the disc-type flywheel motor are both the flat structures to inhibit the gyroscopic effect of the rotors.

The microbattery is formed by a stack of solid thin layers on a substrate which, starting from the substrate, successively comprises a first electrode, a solid electrolyte and a second electrode / current collector assembly. A first surface and a second surface of the electrolyte are respectively in contact with a main surface of the first electrode and a main surface of the second electrode / current collector assembly. The dimensions of the main surface of the first electrode are smaller than the dimensions of the main surface of said assembly, and the dimensions of the first surface of the solid electrolyte are smaller than the dimensions of the second surface of the solid electrolyte. The solid electrolyte is furthermore not in contact with the substrate.

The invention discloses an all-vanadium flow battery. Flow frame plates are provided with liquid inlet holes and liquid outlet holes; the front faces of the flow frame plates are provided with liquid inlet branch flow channels and liquid outlet branch flow channels; the flow frame plates are arranged in sequence sequentially and alternatively in a front face to front face and back face to back face way; an ion exchange membrane is clamped between the front faces of adjacent flow frame plates; a current-conducting plate is clamped between opposite back faces of adjacent flow frame plates; electrodes are arranged in inner frames of the flow frame plates; the aspect ratios of the electrodes are 3-15; the heights of the electrodes are 1-25 centimeters; and the widths of the electrodes are less than or equal to 200 centimeters. In the all-vanadium flow battery, electrodes of large aspect ratios, small heights and large widths are adopted. The all-vanadium flow battery has the advantages of simple structure, small quantity of assemblies, small thickness, small size, low internal resistance, easiness in processing, convenience in assembling, good mass transfer effect and low diffusion polarization of vanadium electrolytes inside the electrodes, low self-discharge current, high power density, high vanadium utilization ratio, high energy efficiency, low cost and high benefit.

The invention relates to La-doped lead zirconate stannate titanate anti-ferroelectric ceramics with high energy storage efficiency and a preparation method thereof. The constitutional chemical formula of the anti-ferroelectric ceramics is (Pb1-1.5xLax)(ZrySn0.9-yTi0.1)O3, wherein x is greater than or equal to 0.02 and smaller than or equal to 0.04, and y is greater than or equal to 0.1 and smaller than or equal to 0.5. According to the preparation method, the anti-ferroelectric ceramics are prepared with a tradional preparation method of electronic ceramics, have the energy storage characteristics of small electric hysteresis and high energy storage efficiency, and have very important significance in developing a high-pressure impulse power capacitor with high energy storage density and high energy storage efficiency.

The invention provides a series-parallel inverter combined optical storage microgrid structure and a control method. The whole optical storage microgrid system is formed by an energy storage subsystemand a photovoltaic subsystem which are mutually connected in parallel, wherein the energy storage subsystem and the photovoltaic subsystem supply power for an equivalent regional load concurrently through respective line impedance. The energy storage subsystem and the photovoltaic subsystem are respectively formed by cascading a plurality of inverter modules which are mutually connected in series, and realize improvement in voltage level and power capacity. Compared with the traditional hybrid optical storage microsource, the system structure provided by the invention can realize flexible control for a single energy storage and photovoltaic unit and improve the conversion efficiency of the whole system. In addition, the invention provides an MPPT algorithm based droop control method in order to realize the maximum utilization ratio of renewable photovoltaic energy; and the invention provides an SOC algorithm based upper droop control strategy in order to realize supply and demand power balance of the system and the charge state balance between the series energy storage modules, and reasonable power flow and stable voltage frequency of the off-grid system are achieved without communication.

The invention discloses an efficient temperature stratification-type water energy-storage water-storage device, and relates to the technical filed of water energy storage, for solving the technical issue of improving the energy storage efficiency. The device comprises a water storage groove and tubular water distributors, and is characterized in that the upper part and the lower part of the inner cavity of the water storage groove are respectively provided with a water seepage flat-type porous medium plate; the plate surface of each porous medium plate is in parallel with the water level, and the periphery of each porous medium plate is jointed with the inner wall of the water storage groove and is water-proof and sealed; the tubular water distributors are two, and are all distributed in the inner cavity of the water storage groove, wherein one tubular water distributor is positioned above the porous medium plate at the upper part, and the other tubular water distributor is positioned below the porous medium plate at the lower part; and the opening of the tubular water distributor at the upper part is upwards, the opening of the tubular water distributor faces downwards, and the two tubular water distributors are communicated with the outer part of the water storage groove through a pipeline. The device provided by the invention has high energy storage efficiency.

The invention discloses a braking system and a braking method of a double-shaft driven electric vehicle. The braking system comprises a whole vehicle control device, a mechanical braking control device and a regenerative braking control device, wherein the mechanical braking control device and the regenerative braking control device are connected with the whole vehicle control device, the regenerative braking control device comprises a front drive motor and a rear drive motor, the front drive motor is connected with a front wheel drive shaft of the electric vehicle through a gear, the rear drive motor is connected with a rear wheel drive shaft of the electric vehicle through a gear, the regenerative braking control device also comprises a front energy storage module and a rear energy storage module, the front energy storage module is electrically connected with a controller of the front drive motor, the rear energy storage module is electrically connected with a controller of the rear drive motor, and the front energy storage module and the rear energy storage module are electrically connected through a DC / DC converter. According to the invention, through respectively adding a drive motor on the front and rear wheel axles of the electric vehicle and respectively arranging an energy storage module on each drive motor, the efficient braking energy recovery is facilitated while the dynamic property of the electric vehicle is ensured.

The invention discloses a bismuth-based lead-free high energy storage density ceramic material and a preparation method thereof, the material and the preparation method relate to the technical field of electronic ceramics and components, and are used in related fields of energy storage capacitor application. The chemical composition of the material conforms to the general formula: (1-x)Bi0.5Na0.5TiO3+x SrTiO3+ywt%Nb2O5, which is synthesized by traditional ceramic preparation process. Through the addition of Nb, the grain size of ceramics is refined, and the breakdown field strength is increased. The ceramic components can obtain Wrec-1.8J / cm3 energy storage density under a direct current field of E = 13kV / mm, and the energy efficiency eta can reach 80 %; and meanwhile, the material has good temperature stability of energy storage performance.

The invention relates to the field of compressed air energy storage power generation and particularly relates to a constant-temperature air storage system applied to a compressed air energy storage power generation system. The constant-temperature air storage system comprises an air storage device 1 and a heat storage device 2 arranged in the air storage device, wherein the heat storage device 2 is a heat storage working medium; the required heat storage working medium is a phase change heat storage working medium or the heat storage working medium with the specific heat capacity more than 0.5 kJ / kgk or a combination of the phase change heat storage working medium and the heat storage working medium. The constant-temperature air storage system has the following advantages: firstly, the air storage device can adopt a cheaper steel and iron material, so that the adoption of a more expensive low-temperature-resistant material is avoided and the cost is saved; secondly, heat stored in a high-efficiency heat storage device in an air bleeding process can be used for heating air in the air storage device, so that the primary temperature of the air entering a turbo expander is increased, the work applying capability of the air is improved, and the energy storage efficiency of the system is improved.

The invention relates to a lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material and a preparation method thereof. The lanthanum-doped silver niobate lead-free anti-ferroelectric energy storage ceramic material has a single perovskite structure, and has a general formula of Ag1-3xLaxNbO3, wherein x is greater than or equal to 0.01 and smaller than or equal to0.08, preferably x is greater than or equal to 0.03 and smaller than or equal to 0.04.

The invention provides an anti-ferroelectric ceramic material with high energy storage density and a preparation method thereof. The chemical general formula of the anti-ferroelectric ceramic materialis Pb0.97La0.02[(Zr0.375Sn0.625)1-xTix]O3+a SiO2, wherein x is greater than or equal to 0.1 and less than or equal to 0.15, a is the molar percentage of SiO2 to Pb0.97La0.02[(Zr0.375Sn0.625)1-xTix]O3, and a is greater than or equal to 3% and less than or equal to 5%.

The invention relates to a high-energy storage density barium strontium titanate-based leadless relaxor ferroelectric ceramic and a preparation method thereof. The chemical formula of the barium strontium titanate-based leadless relaxor ferroelectric ceramic is (1-x)(Ba0.55Sr0.45)TiO3-xBi(Mg2 / 3Nb1 / 3)O3, wherein x is more than 0 and not more than 0.15.

The invention discloses a gradient gravity energy storage system for an abandoned mine well shaft and gangue after mining, and provides a more economical new energy storage system and secondary utilization system for the abandoned mine well shaft and the gangue after mining. Based on the specific exploitation situation of an abandoned mine well, abandoned mine well shafts are utilized to serve asenergy storage channels; underground parking lots with different elevations are constructed between a primary well and a secondary well; the number of cage conductors are set according to corresponding elevation difference and the number of parking lots; the number of the cage conductors in a channel on one side is equal to the number of the underground parking lots; and the rising and falling elevation differences between the cage conductors are equal to each other all the time. The system comprises energy storage-release channels transformed by an abandoned primary well and an abandoned secondary well; the upper parts of the channels are out of the ground to connect corresponding equipment; the lower parts are connected with various underground parking lots; various channels are connected to the parking lots by utilizing connecting roadways; when energy is stored, a mine vehicle in a lower-position parking lot is lifted to an upper-position parking lot by a lifting system; and when the energy is released, the mine vehicle in the upper-position parking lot is dropped to the lower-position parking lot. Gradient gravity energy storage and release are realized by controlling the loading capacity of the gangue of the mine vehicle and the transferring amount between the cage conductors in a centralized manner by means of a central control chamber; and in addition, buffering springsare arranged between adjacent cage conductors, so that the energy impact caused by accidental fracture of a steel wire rope is reduced. According to the system, the problem about power energy storageof new energy is solved on the basis of comprehensive utilization of the abandoned mine well shaft and the gangue; and transformation reference is provided for the abandoned well after mining and thewell which is about to be pulled out of production capacity.

The invention discloses a low-temperature and high-pressure liquid air energy storage system. The system comprises a drive motor, a compressor unit, a cooler unit, a cold accumulator, a liquid air storage tank, a throttle valve, a heater unit, an expansion unit and a power generator. The drive motor, the compressor unit, the cooler unit, the cold accumulator and the liquid air storage tank are sequentially connected to form an energy storage channel. The liquid air storage tank, the throttle valve, the cold accumulator, the heater unit, the expansion unit and the power generator are sequentially connected to form an energy releasing channel. According to the system, air is stored in the liquid storage tank in a high-pressure and low-temperature liquid state manner, limitation from the geographical environment is avoided, and the energy storage density is high; the liquefaction ratio of the system can theoretically reach 100%, backflow gas losses are avoided, and the energy storage efficiency is further improved; and in addition, the system is more simple in structure and low in energy consumption.

The invention discloses a movable foam metal based phase-change energy-storage temperature control system and a method thereof. The system is composed of a cavity, a phase-change material, a fixed foam metal framework, a movable foam metal framework and a memory alloy. The cavity is filled with the phase-change material. The fixed foam metal framework is fixed inside the cavity at one side close to a temperature control protection object. The movable foam metal framework and the fixed foam metal framework are adjacent to each other and are connected through the memory alloy. Memory temperature of the memory alloy is higher than melting temperature of the phase-change material. During the melting process, the memory alloy stretches to push the movable foam metal framework to cling to an interface of the liquid and solid phase and continuously move forwards with development of the interface of the liquid and solid phase. During the solidification process, the memory alloy contracts and returns to the initial position with the movable foam metal framework. By the utilization of the fixed foam metal framework, heat transfer at the interface resistance of the cavity and the phase-change material is enhanced; by the utilization of the movable foam metal framework, heat transfer at the solid-liquid interface resistance is enhanced; and by the utilization of the memory alloy, heat transfer at non-essential heat resistance of the remaining part is reinforced. While phase-change heat transfer is reinforced by the utilization of foam metal, inhibition of natural-convection heat transfer and loss of heat storage capacity are remarkably reduced.

The invention discloses a bionic cascade phase change energy storage device. The bionic cascade phase change energy storage device comprises a heat exchange plate and an energy storage plate in contact with the heat exchange plate for heat exchange. The heat exchange plate is internally provided with bionic cascade flow channels, the bionic cascade flow channels are leaf-shaped bionic cascade bifurcated flow channels, and the bionic cascade flow channels comprise a middle main flow channel body, leaf-shaped bionic cascade bifurcated flow channel bodies and edge flow channel bodies, wherein theleaf-shaped bionic cascade bifurcated flow channel bodies extend along the middle main flow channel body to both sides in a bifurcated mode. The edge flow channel bodies communicate with the tail ends of the leaf-shaped bionic cascade bifurcated flow channel bodies. The energy storage plate is internally provided with a metal hole frame structure and phase change material, wherein the metal holeframe structure is filled with the phase change material, the metal hole frame structure is a foam metal plate with variable porosity, and the porosity of the foam metal plate decreases gradually fromthe middle main flow channel body to both sides. According to the bionic cascade phase change energy storage device, the heat conduction characteristic of the phase change material can be effectivelyimproved, and the heat absorption and release rate and heat storage capacity of the phase change material are enhanced; the heat exchange efficiency with thermal fluid is improved, and energy loss isreduced; and the structure is simple, assembly and disassembly are convenient, and a guarantee for the efficient and reliable operation of an energy system is provided.

The invention discloses a medical image fusion method based on an improved pulse coupling neural network. The medical image fusion method comprises the following steps of 1, performing Gamma correction on a multi-mode medical image to enhance the contrast ratio of the medical image; 2, performing multi-scale decomposition on the corrected image to be fused by adopting non-subsampled shear waves toobtain a low-frequency subgraph and a high-frequency subgraph; 3, fusing the low-frequency sub-graphs by adopting an improved regional energy algorithm; 4, fusing the high-frequency sub-graphs by adopting an improved pulse coupling neural network algorithm; and 5, reconstructing the fused high-frequency subgraph and the fused low-frequency subgraph by adopting non-subsampled shear wave inverse transformation to obtain a final fused image. The multi-modal medical image fusion method can effectively fuse multi-modal medical images, and improves the accuracy of doctors in diagnosing the illnessstate of a patient.

The invention discloses a gradient structure polymer nano-composite material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing composite non-woven fabric with a gradient structure by using a modified electrostatic spinning method, wherein the composite non-woven fabric comprises polymer composite nano fibers and / or polymer nano fibers, the polymer composite nano fibers are capable of using a polymer as a main body fiber skeleton, and enabling nano filler to be dispersed in the main body fiber skeleton; and (2) successively performing hot-pressing and heat treatment on the composite non-woven fabric, to obtain the gradient structure polymer nano-composite material. The method is capable of realizing preparation of the gradient structure composite material, and continuous gradient change of the nano filler in the composite material, wherein a gradient direction is adjustable, and the gradient composite material has an excellent dielectric property and extremely high performance stability.

The invention discloses a long-acting integrated power supply system based on a thin-film solar battery. The long-acting integrated power supply system comprises energy storage equipment which comprises a thin-film photovoltaic module, a super capacitor module, a charging and discharging controller, a voltage regulator module and a lithium battery component, wherein an output end of the thin-film photovoltaic module is connected with an input end of the super capacitor module; the output end of the super capacitor module is connected with the input end of the charging and discharging controller; the output end of the charging and discharging controller is connected with the voltage regulator module; the lithium battery component is connected with the charging and discharging controller; the thin-film photovoltaic module is a flexible or rigid thin-film solar battery; and the rated voltage of the thin-film photovoltaic module is higher than the maximal voltage of the lithium battery component. According to the long-acting integrated power supply system, which is light, efficient and long in lifetime, based on the thin-film solar battery and the charging method, the weak light power generating performance of the thin-film photovoltaic module and the low-voltage charging performance of the super capacitor are fully utilized; and the long-acting integrated power supply system has the advantages of efficient weak light power generation and high overall system efficiency.

The embodiment of the invention discloses a method and device for controlling the energy storage grid-connected charge and discharge capacity at the power generation side, a server and a storage medium. The method comprises the steps of acquiring historical data of the power generation side in a power station, and acquiring the actual power generation condition and power limitation condition of the power station according to the historical data; calculating the actual generation power after power station energy storage equipment is added according to parameters of the energy storage side; calculating the dual-detailed rule assessment score difference by combining the actual power generation condition, the power limitation condition and the actual generation power after the power station energy storage equipment is added; optimizing parameters of a correction function so as to minimize the dual-detailed rule assessment score difference calculated by using the optimized correction function; and adjusting the predicted power value according to the corrected and optimized parameters, and controlling the energy storage side to perform charge / discharge control according to the adjusted predicted power value. The method can effectively improve the accuracy of the predicted power, and can optimize the energy storage efficiency of energy storage equipment under the premise of meeting the dual-detailed rule assessment.

The invention provides an environment-friendly heavy hammer type energy storage power station which is provided with a generator set, a speed regulating transmission and a frame, wherein the output end of the generator set is connected with the input end of the speed regulating transmission, the output of the speed regulating transmission is connected with the input of a winch on the side of the frame, and a steel wire rope on the winch bypasses a crown block at the upper end of the framework to be fixedly connected with a heavy hammer. According to the invention, the heavy hammer is vertically lifted and falls linearly to store electric energy in a physical form in attraction of the heavy hammer by using vertical attraction of the heavy hammer as an energy carrier, so that the power station is an environment-friendly modern physical energy storage technical method, technical supports synchronism of new energy power generation and peak load and frequency regulation of an intelligent power grid are realized for enhancing complement of both advantages and interactive coordination of new energy power generation and the intelligent power grid, the quality of electric energy is improved, the condition that a new energy power generation and the intelligent power grid operate safely is ensured, the ecological environment is protected and the economic and social benefits are improved.

The invention provides a management system and SOC calibration method of a lithium iron phosphate battery, comprising a single battery management unit, a battery pack management unit and a battery system management unit with a three-layer network structure; the single battery management unit manages the lithium iron phosphate battery ;The battery pack management unit manages the single battery management unit, the battery system management unit manages the battery pack management unit, the monitoring system is connected with the battery system management unit and monitors the entire system; the monitoring system is connected with a monitoring dispatching system and an energy storage converter; SOC The calibration method is to cooperate with the monitoring system and the energy storage converter to automatically perform the capacity calibration and SOC calibration of the battery system. Compared with the prior art, the management system and SOC calibration method of the lithium iron phosphate battery provided by the present invention improve the safety and reliability of the lithium iron phosphate battery, effectively prolong its service life, and greatly improve the calibration accuracy of its SOC , to ensure the safety of lithium iron phosphate batteries in large-scale energy storage power stations.