1276 results about "Discharge efficiency" patented technology

The invention belongs to the technical field of power systems, and particularly relates to an audit data early warning method and system, and the method comprises the steps: collecting the node voltage and current of a power supply network and the charging and discharging efficiency data of an energy storage system in real time through a distributed sensor network, and generating an original data flow; carrying out localized cleaning and standardized format conversion through an edge computing node; generating a dynamic risk assessment result and a scheduling scheme based on fuzzy logic reasoning and digital twinborn simulation; and analyzing and predicting deviation through meta-learning, and realizing closed-loop optimization by adopting a model distillation technology. The system comprises a distributed sensor network, an edge computing node, a multi-source data fusion module and the like. According to the method, the anomaly detection real-time performance, the risk assessment accuracy and the energy storage scheduling economy of the power system are improved.

Disclosed is a battery health state assessment method, including performing discharge control on a cell until a cutoff voltage; performing charge control on the cell until a preset cell load rated capacity, and performing discharge control on the cell until the cutoff voltage, and generating cell discharge efficiency information; performing charge and discharge cycle control on the cell and acquiring corresponding charge and discharge cycle control efficiency information; using a cell load algorithm to calculate and generate a cell load actual capacity information; and generating a cell health state assessment information according to the ratio between the cell load actual capacity and the cell load rated capacity. The accuracy of the SOH assessment process can be improved by implementing the methods of the embodiments of the present application to optimize the battery performance assessment process and improve the battery charge and discharge efficiency assessment capability.

The invention relates to the technical field of battery charging and discharging optimization, and discloses a charging and discharging optimization method, device and equipment for a robot energy storage battery, and the method comprises the steps: collecting a working condition feature data set of the robot energy storage battery; performing state cooperative calculation on the working condition characteristic data set to obtain battery operation state data; establishing a mapping relation model of load power and charge-discharge efficiency, and determining a battery working interval boundary value to obtain charge-discharge characteristic data; inputting the charge and discharge characteristic data into a deep gating cycle unit network, and obtaining a battery performance prediction model through dynamic modeling; based on a battery performance prediction model, a gain factor self-tuning technology is adopted to construct a closed-loop controller, online optimization calculation is carried out on control parameters through a gradient descent algorithm, a control instruction containing a charging and discharging current limit value and a voltage threshold value is generated, and then accurate prediction of the battery performance is achieved. And stable operation of the charging and discharging control system is ensured.

The invention relates to the technical field of battery charging and discharging optimization, and discloses an energy management system data analysis method, device and equipment and a storage medium, and the method comprises the steps: collecting a working condition feature data set of a robot energy storage battery through an energy management system; performing state cooperative calculation on the working condition characteristic data set to obtain battery operation state data; establishing a mapping relation model of load power and charge-discharge efficiency, and determining a battery working interval boundary value to obtain charge-discharge characteristic data; inputting the charge and discharge characteristic data into a deep gating cycle unit network, and obtaining a battery performance prediction model through dynamic modeling; based on a battery performance prediction model, a gain factor self-tuning technology is adopted to construct a closed-loop controller, online optimization calculation is carried out on control parameters through a gradient descent algorithm, a control instruction containing a charging and discharging current limit value and a voltage threshold value is generated, accurate prediction of battery performance is further achieved, and stable operation of an energy management system is ensured.

The invention relates to a photovoltaic power grid energy storage optimization regulation and control method based on multi-scale prediction. The method comprises the following steps: A1, obtaining historical power generation data, real-time meteorological data and numerical weather forecast of a photovoltaic power station; a2, generating a multi-time-scale photovoltaic output prediction sequence; a3, establishing an energy storage dynamic model of charge and discharge efficiency, capacity attenuation and operation constraint; a4, generating an energy storage charging and discharging demand curve under different time scales; a5, constructing a multi-time scale coupled optimization model by taking power grid operation cost minimization and renewable energy consumption maximization as targets; a6, updating an energy storage scheduling instruction in a rolling manner based on latest prediction data by adopting a model prediction control framework; a7, monitoring the deviation between the actual photovoltaic output and the power grid load, and dynamically adjusting the energy storage charging and discharging power; and A8, correcting a prediction error through Kalman filtering and a closed-loop feedback mechanism. According to the invention, high-efficiency operation can be realized, and power grid cost minimization and renewable energy consumption maximization can be realized.

The invention discloses a dispersed transformer cooling system and method, and relates to the technical field of transformers, integration supporting rods are mounted on the inner side of a transformer integration box through fixing bolts, a treatment transformer box is welded to the top ends of the two integration supporting rods, a hollow supporting rod is clamped to the inner side of the treatment transformer box, and a transformer core is mounted at the top end of the hollow supporting rod; the device effectively solves the problems that in the prior art, due to the fact that oil cannot circulate, heat is concentrated at the position of a transformer core, the internal temperature cannot be homogenized, only external air cooling treatment is conducted, the heat removal efficiency is poor, meanwhile, oil overflow and oil liquid level control are utilized, and the heat removal efficiency is poor. And the heat exchange area is increased, and the influence of oil on the operation environment and the operation stability is avoided, so that the heat exchange area is increased, the heat exchange speed is increased, the overall temperature is balanced, and stable operation treatment of the transformer is realized.

The invention relates to the technical field of battery positive electrode materials, and provides a lithium iron phosphate positive electrode material and a preparation method thereof. The lithium iron phosphate positive electrode material has the characteristic of high energy density, the proportion of iron phosphide impurities in the total mass of the lithium iron phosphate positive electrode material is 0.001-0.008 PPM, the compaction density under the pressure of 3T is 2.68-2.8 g / cm < 3 >, the powder resistivity is 8-15 omega.cm, the 0.1 C discharge capacity is 161-163 mAh / g, the 0.1 C charge-discharge efficiency is 98.5-100%, and the 1C discharge capacity is 145-148 mAh / g. The preparation process is simple and safe, low in cost and high in stability. The content of iron phosphide impurities in a final lithium iron phosphate product can be regulated and controlled by regulating and controlling the phosphorus-iron ratio of the iron phosphate precursor and the ratio of the carbon source to the iron phosphate precursor in two-time burdening and controlling the sintering temperature in cooperation with secondary sintering, and the high-energy-density lithium iron phosphate positive electrode material is obtained.

The invention belongs to the technical field of battery maintenance, and discloses a new energy automobile battery maintenance device which comprises a base, mounting grooves are formed in the upper surface of the base at equal intervals, clamping grooves are symmetrically formed in the front side and the rear side of the bottom of each mounting groove, a mounting shell is fixedly mounted on the upper surface of the base, and a plurality of guide grooves are formed in the upper surface of the mounting shell at equal intervals. Side grooves are symmetrically formed in the side faces of the guide groove, and electric heating plates fixedly sleeve the middles of the front side groove and the rear side groove. Mercury in the telescopic sleeve is heated to expand, so that the expanded mercury in the telescopic sleeve pushes the telescopic end of the telescopic sleeve to move upwards, the telescopic end of the telescopic sleeve drives the heat conducting plate to move upwards through the electric plate to be in contact with the heat dissipation plate, and at the moment, the heat dissipation plate dissipates heat of the battery through the sleeve column and the heat conducting plate; therefore, the problems that the charging and discharging efficiency of the battery is low and the service life is shortened when the battery works in a high-temperature or low-temperature environment are solved.

The invention discloses a power supply intelligent management system of an AGV trolley, and relates to the technical field of intelligent management, during operation of the system, data monitoring is performed through various sensors, measuring equipment and a battery management system BMS, and internal resistance data, battery capacity attenuation conditions and battery charging and discharging conditions of a battery of the AGV trolley are acquired in real time; the battery health index is comprehensively calculated through the battery internal resistance coefficient, the battery capacity attenuation coefficient and the battery charging and discharging efficiency coefficient, the output power of the battery is dynamically adjusted, the charging and discharging process of the battery is automatically adjusted according to data collected in real time and a load evaluation result, and intelligent scheduling is achieved according to needs. By analyzing the health data, the charging and discharging behaviors and the working environment of the battery, the battery fault is predicted in time, automatic fault detection and early warning are supported, system shutdown or performance reduction caused by the battery fault is avoided, an interactive interface between a user and the system is provided, and remote monitoring and control are supported at the same time.

The invention discloses a wind and light storage and charging micro-grid distribution optimization method and system. The method comprises the following steps: acquiring parameter data of each node in a micro-grid in real time; constructing a load demand prediction model, and automatically adjusting the scheduling weight coefficient of the wind and light storage and charging equipment according to the weather type; based on a model output result, establishing a matching relationship between the line impedance and the load emergency degree, generating a power supply path set, and creating a power path selection mechanism based on a dynamic planning algorithm; calculating real-time charge-discharge efficiency based on the equivalent resistance parameter of the power supply path, and dynamically adjusting a charge-discharge rate threshold according to a prediction error; acquiring a real-time monitoring load curve, calculating the similarity between the load curve and historical data, and matching and identifying a potential sudden change risk; and according to a distributed negotiation protocol, each node achieves a scheduling consensus through a priority broadcasting mechanism. The method has the advantages that through load prediction and dynamic scheduling, optimal scheduling, power fluctuation stabilization and sudden change risk identification of the wind and light storage and charging equipment are realized.

The invention discloses an industrial and commercial energy storage system management optimization method and system, and relates to the technical field of energy storage management, and the method comprises the steps: obtaining a charging efficient time period, a discharging efficient time period, and a charging and discharging equalization time period; performing charging efficiency analysis to obtain a charging influence interval; performing discharge efficiency analysis to obtain a discharge influence interval, a discharge minimum limit and a discharge minimum limit; obtaining a charging and discharging switching interval, and managing the energy storage system; the method is used for solving the problem that when the battery pack is applied to a working scene where the battery pack is frequently used, the charging and discharging states of the battery pack cannot be effectively monitored, so that the charging efficiency or the power supply efficiency cannot reach the standard, and power cannot be effectively supplied to a power utilization unit.

The invention provides a distributed energy storage lithium battery state optimization management method based on an intelligent algorithm, and relates to the technical field of an intelligent power distribution system of new energy power transmission and distribution equipment, IPC classification numbers belong to H02J7 / 00 and G01R31 / 382, the intelligent algorithm is introduced, health state data and discharge efficiency indexes of a lithium battery module are collected and analyzed in real time, and the lithium battery module state optimization management method based on the intelligent algorithm is achieved. A battery state evaluation coefficient is dynamically generated, and priority ranking and intelligent strategy adjustment are carried out; therefore, the response speed and efficiency of the system are improved, and accurate adjustment under different load conditions is realized through simulation and calibration strategy optimization, so that the stability and reliability of the whole energy storage system are enhanced while the use efficiency and the service life of the battery are remarkably improved and prolonged.

A preparation method for a hard carbon negative electrode material. The method comprises the following steps: uniformly mixing a polymer material and a cross-linking agent, so as to obtain a mixture; placing the mixture in an oxygen-free environment and performing primary calcination, so as to obtain a precursor; placing the precursor in an oxygen-containing environment and performing secondary calcination, so as to obtain a modified precursor; and placing the modified precursor in an oxygen-free environment and performing third calcination, so as to obtain a hard carbon negative electrode material. By mixing the polymer material and the cross-linking agent, carrying out primary calcination to achieve cross-linking among polymers, carrying out secondary calcination to introduce an oxygen-containing functional group, and carrying out tertiary calcination and a pore closing treatment, the prepared hard carbon has a disordered interlayer structure, which is beneficial for the intercalation / deintercalation of sodium ions, thereby exhibiting a relatively high reversible capacity and first charge-discharge efficiency. The prepared hard carbon negative electrode material is further applied to a negative electrode of a sodium-ion battery.

The present invention discloses a formation method for a sodium-ion single battery, which includes constant current charging of the sodium-ion single battery at a charging rate of 0.1C - 0.5C under the condition of 20 - 25°C, and the charging cut-off voltage is V C1 and standing still for 30 - 60 minutes, placing the single battery under the condition of 2 - 10°C for 1 - 2 h, and using voltage V C2 to perform constant voltage charging for 2 - 5 seconds and then standing still for 3 - 8 seconds, standing still for 30 - 60 minutes under the condition of 20 - 25°C, and performing constant current discharging of the sodium-ion single battery at a discharging rate of 0.1C - 0.5C, and the discharging cut-off voltage is V D1、 placing the single battery under the condition of 35 - 55°C for 1 - 2 h, and using voltage V D2 to perform constant voltage discharging for 3 - 6 seconds and standing still for 5 - 8 seconds. The formation method of the sodium-ion single battery significantly changes the performance of the sodium-ion battery, effectively improving the first capacity, charge and discharge efficiency, and cycle life of the sodium-ion battery.

The invention discloses an energy storage system efficiency control method and device and an energy storage system. The method comprises the following steps: acquiring different charging and discharging efficiencies of an energy storage system under different charging and discharging powers, and constructing a mapping relation curve between the charging and discharging powers and the charging and discharging efficiencies; obtaining a to-be-performed charging and discharging task and calculating the minimum charging and discharging power required for completing the charging and discharging task; and acquiring a corresponding charge-discharge efficiency interval between the minimum charge-discharge power and the preset rated charge-discharge power on the mapping relation curve, and selecting the charge-discharge power corresponding to the maximum charge-discharge efficiency in the interval as the target charge-discharge power. According to the invention, the mapping relation curve between the charging and discharging power and the charging and discharging efficiency is pre-stored in the energy storage system, and the energy storage system uses the mapping relation curve to calculate the target charging and discharging power capable of enabling the charging and discharging efficiency to reach higher target charging and discharging power according to the charging and discharging demand of the charging and discharging task, so that the charging and discharging efficiency of the energy storage system is improved; and the overall benefit of the energy storage system is improved.

The invention relates to the field of lead storage batteries, and discloses a lead storage power battery positive electrode lead paste additive and application thereof. The additive is composed of a tin-antimony compound, 4BS and graphite, the addition amount of the tin-antimony compound is 0.1%-0.5% of the weight of lead powder used in the positive electrode of the lead storage power battery, the addition amount of the 4BS is 0.5%-2% of the weight of the lead powder used in the positive electrode of the lead storage power battery, and the addition amount of the graphite is 0.1%-0.3% of the weight of the lead powder used in the positive electrode of the lead storage power battery. The additive disclosed by the invention is used in the positive lead plaster of the lead storage power battery, and can improve the porosity of a polar plate, improve the charge-discharge efficiency and the initial capacity of the battery and guarantee the cycle service life of the battery at the same time.

The invention discloses an off-grid photovoltaic power generation system based on flywheel clean battery energy storage. A cleaning model and a charging / discharging equivalent model circuit under a d-q shaft system are established; a control strategy in the flywheel battery charging / discharging process is analyzed and determined, a photovoltaic system and a flywheel battery are combined, a combined system is divided into four working models according to the supply-demand relation between the output power of the photovoltaic system and the power required by a load, and a control method of a combined controller is formulated. And analyzing and optimizing the operation state of the system under each working model and the energy storage and release effects of the flywheel battery. The combined system can stably operate under each working model and among the working models; the charging / discharging efficiency and the discharging depth are relatively high, and a quick response can be made to the difference value change of the output and the load power of the photovoltaic system; and energy is stored when the output of the photovoltaic system is residual, and energy is released to make up for the demand when the output of the photovoltaic system is insufficient, so that the electric energy quality is effectively improved, and the resource waste is reduced.

The invention provides a communication master control system based on intelligent power supply, and relates to the technical field of communication, and the system comprises a power supply monitoring module which is used for monitoring the commercial power supply state of a communication base station, and automatically controlling a power switching circuit to switch a power supply mode to a standby battery power supply mode when the commercial power interruption is detected; the state acquisition module is used for acquiring the charge state, the discharge efficiency and the health state data of the standby battery in real time in a standby battery power supply mode, and acquiring the residual capacity, the actual discharge capacity and the life index of the battery; and the load receiving module is used for uploading the residual capacity, the actual discharge capacity and the life index of the battery to the communication main control unit, and receiving load data in the current communication network at the same time. According to the invention, intelligent scheduling of power utilization is realized, and the power supply reliability and stability of the communication system are improved.

The invention provides a polyimide microsphere coating modified battery diaphragm and a lithium ion battery. The battery diaphragm comprises a base membrane and a coating formed by coating the surface of the base membrane, the coating comprises polyimide microspheres with functions of adsorbing metal ions and exchanging lithium ions. According to the polyimide microsphere coating modified battery diaphragm and the lithium ion battery provided by the invention, the polyimide microspheres with metal ion adsorption and lithium ion exchange functions are utilized to form the base membrane coating, so that metal ions dissolved out of the battery can be effectively adsorbed, and the situation that the metal ions are deposited on a negative electrode to damage an SEI membrane is reduced; the cycle performance and the safety performance of the battery are improved, the lithium ion exchange and transmission of the diaphragm are improved, and the charge-discharge efficiency of the battery is further improved.

The invention relates to the technical field of lithium battery heat dissipation, in particular to an air cooling structure for strengthening lithium battery heat dissipation, which comprises a box body, a heat exchange assembly for conducting heat on a plurality of lithium battery modules is arranged on the top surface of the box body, heat dissipation fins are arranged in the circumferential direction of the heat exchange assembly, and the heat dissipation fins abut against the lithium battery modules. The interior of the box body is divided into an air inlet cavity and an air outlet cavity through a flow guide grid, and one end of the heat exchange assembly extends into the air outlet cavity. The two opposite long side plates of the box body are respectively provided with a ventilation opening, a fan is installed on each ventilation opening, one ventilation opening is communicated with the air inlet cavity, and the other ventilation opening is communicated with the air outlet cavity. According to the invention, air in the air inlet cavity can be uniformly distributed in the air outlet cavity through the flow guide grid, so that air in the air outlet cavity can effectively take away heat transferred by the heat exchange assembly and discharge the heat out of the box body; and the heat dissipation efficiency can be effectively improved, so that the lithium battery module can work in a proper temperature range, and the discharge efficiency and the cycle life of the lithium battery are effectively improved and prolonged.

The invention provides anhydrous iron phosphate and a preparation method thereof, a positive electrode material and a preparation method thereof, a positive electrode plate and a secondary battery, and belongs to the field of secondary batteries, in primary particles of the anhydrous iron phosphate, the amount of particles with the particle size larger than or equal to 0.01 mu m and smaller than 0.1 mu m accounts for 10-30%, and the amount of particles with the particle size smaller than 0.1 mu m accounts for 10-30%. The quantity ratio of the particles with the particle size of 0.1 mu m-0. 2 mu m is 50%-60%, the quantity ratio of the particles with the particle size larger than 0.2 mu m and smaller than 0.4 mu m is 15%-30%, and the quantity ratio of the particles with the particle size of 0.4 mu m-0. 6 mu m is 0.2%-10%. The anhydrous iron phosphate with good dispersity can be obtained by controlling grain composition, and as a basis for preparing a high-compaction positive electrode material, the positive electrode material with high compaction density, good rate capability and high charging and discharging efficiency can be obtained.

The invention relates to the technical field of lithium batteries, in particular to a carbon nanotube modified lithium manganese iron phosphate material, application and a preparation method. The method comprises the following steps: mixing a solution containing lithium, phosphorus, iron and manganese with carbon nanotubes, heating to obtain lithium manganese iron phosphate powder, and sintering to generate the carbon nanotube modified lithium manganese iron phosphate material in situ. According to the method, the lithium manganese iron phosphate positive electrode material is generated in situ by utilizing the excellent conductivity of the carbon nanotubes, and the carbon nanotubes can form a uniform conductive network, so that the internal resistance of the material is remarkably reduced, and the charge-discharge efficiency of the material is improved; the method is simple in preparation process, uniform in obtained material structure, low in production energy consumption and raw material cost and suitable for large-scale industrial production.

The utility model provides a dry-method pole piece preparation device. The dry-method pole piece preparation device comprises a current collector conveying mechanism, an electrode film rolling mechanism and a lithium supplementing mechanism, the current collector conveying mechanism is used for conveying a current collector; the electrode film rolling mechanisms are arranged on the two sides of the conveying direction of the current collector, and the electrode film rolling mechanisms are used for conveying dry-state electrode films and covering the two sides of the current collector with the conveyed dry-state electrode films; the lithium supplementing mechanisms are arranged on the two sides of the conveying direction of the current collector and located on the downstream of the electrode film rolling mechanism, and the lithium supplementing mechanisms are used for covering the surface of the dry-state electrode film with the conveyed lithium strip. According to the dry-method pole piece preparation device disclosed by the utility model, metal lithium can be compounded on the surface of a dry-state electrode film to make up the loss of active lithium, so that the charge-discharge efficiency and the cycle life of a dry-method electrode lithium battery can be improved.

The invention discloses a pulse discharge eddy current cavitation generator which comprises an eddy current container, and the eddy current container is provided with a liquid inlet pipe allowing liquid to be guided in tangentially. An inlet of the liquid outlet pipe is communicated with the center of the vortex container, and the liquid outlet pipe is provided with an inner diameter decreasing section, a throat part and an inner diameter increasing section which are sequentially arranged from bottom to top; the flow guide part is arranged in the center of the vortex container and is positioned on the lower side of the liquid outlet pipe; from bottom to top, the outer diameter of the flow guide piece is gradually reduced; the flow guide part and the liquid outlet pipe are coaxially arranged; a first electrode is arranged in the liquid outlet pipe, and a second electrode opposite to the first electrode is arranged in the flow guide part; the liquid outlet pipe is provided with an electrode holder for fixing the first electrode; and the liquid outlet pipe body is provided with a liquid outlet. The vortex hydrodynamic cavitation generator and the nanosecond pulse device are combined in the same device, so that the energy consumption of the device is reduced, the discharge efficiency and the organic matter degradation efficiency are improved, and the space is saved.

The invention belongs to the technical field of hydrogen storage equipment, and discloses vertical dividing wall type solid hydrogen storage equipment which comprises a high-temperature steam conveying pipe, one end of the high-temperature steam conveying pipe is connected with a plurality of steam auxiliary pipes, and the other end of each steam auxiliary pipe is connected with a solid hydrogen storage tank through a steam pipe connector. The top of each solid hydrogen storage tank is connected to a hydrogen pipe through a hydrogen charging and discharging port, a steam layer is further arranged at the top of each solid hydrogen storage tank, and a steam output pipe is connected to the bottom of each steam layer. High-temperature steam generated by a power plant is mainly used for heating the solid hydrogen storage tank; the solid hydrogen storage material is preferably magnesium-based solid hydrogen storage alloy, the interior of the solid hydrogen storage tank has an efficient heat transfer effect, the adopted spiral fins and the solid hydrogen storage tank are well fixed, and the spiral fins are beneficial to the heat transfer and mass transfer process of the solid hydrogen storage material; and the inner pipe, the sprue spreader and the dividing wall layer are matched to heat the liner internally and externally at the same time, so that the hydrogen absorption and desorption efficiency of the solid hydrogen storage tank is improved.

To appropriately control the charging and discharging of a storage battery that is used to be connected to a power system and installed in a vehicle.SOLUTION: When the present SOC (State Of Charge) of a storage battery is equal to or higher than a minimum dischargeable value and there is no reservation for vehicle use, the charge / discharge control system discharges the power of the storage battery to a power system such that the SOC of the storage battery is equal to an SOC lower limit value. Thereafter, the charge / discharge control system creates charge / discharge plan so as to charge the storage battery with power supplied from the power system such that the SOC of the storage battery is equal to an SOC upper limit value. When the present SOC of the storage battery is lower than a dischargeable lower limit value, the charge / discharge control system creates a charge / discharge plan so as to charge the storage battery with power supplied from the power system such that the SOC of the storage battery is equal to the SOC upper limit value, and the storage battery is controlled according to the created charge / discharge plan. The charge / discharge control system creates a charge / discharge plan while taking into account the discharge efficiency and charge efficiency of the storage battery.SELECTED DRAWING: Figure 3

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 relates to the technical field of energy storage, and discloses a charge-discharge control device and method for a flow battery, and the device comprises a circulation mechanism which is used for storing and transporting positive and negative electrolyte, and is also used for realizing ion transfer by using a diaphragm or an ion exchange membrane, so as to realize charge-discharge operation; the flow slowing mechanism is arranged on the periphery of the circulating mechanism and is used for adjusting the flow velocity and the flow of the positive electrode electrolyte and the negative electrode electrolyte when being continuously extruded, so that the charging and discharging efficiency of the battery is adjusted; and the adjusting mechanism is arranged on the outer side of the flow slowing mechanism and is used for automatically controlling the extrusion degree of the flow slowing mechanism so as to automatically adjust or stop the flow velocity and flow of the positive and negative electrolyte. According to the invention, through precise flow rate regulation and control, intelligent charging and discharging management and multi-level fault monitoring, battery charging and discharging efficiency improvement, energy optimization management and safe and stable operation and remote intelligent operation and maintenance of the system are realized.

The invention discloses an island microgrid distributed energy storage locating and sizing method and device based on data driving. The method comprises the following steps: acquiring a power generation power prediction value of each photovoltaic unit and a load power prediction value of each load node; determining the island power supply gap, the full life cycle cost and the energy storage charge and discharge efficiency of the micro-grid; giving out constraint conditions of operation of the micro-grid; constructing an island micro-grid simulation model based on the constraint condition of micro-grid operation; constructing a multi-objective optimization function based on the island power supply gap, the full life cycle cost and the energy storage charge and discharge efficiency of the micro-grid; and in combination with the analysis of the island microgrid simulation model and the multi-objective optimization function, giving the site selection and capacity of each energy storage unit to be configured. According to the method, a source-load uncertainty rule and time-space correlation characteristics are directly learned from historical data, distributed energy storage locating and sizing are guided, actual operation characteristics of an island microgrid are accurately matched, and reasonable configuration of an energy storage unit is achieved.

The invention relates to the field of positive electrode materials, in particular to a graphene reinforced lithium iron phosphate material and a preparation method and application thereof. According to the positive electrode material, europium ions are doped into lithium iron phosphate, the europium ions are large in radius, a larger migration channel is provided for lithium ions, meanwhile, the binding energy of the lithium ions can be reduced, the surface of the europium-doped lithium iron phosphate is coated with carbonized hydroxyethyl methyl cellulose grafted graphene, the hydroxyethyl methyl cellulose reduces the agglomeration phenomenon of the graphene, and the conductivity of the lithium iron phosphate is improved. After carbonization, a 3D conductive carbon network is jointly formed with graphene, so that the electronic conductivity is enhanced; the positive electrode material has the advantages of long cycle life, high charge-discharge efficiency, high conductivity and high cycle stability, provides a good energy storage basis for batteries, and is suitable for the fields of power batteries and energy storage.