134 results about "Floating charge" patented technology

The invention discloses a storage battery abnormity early warning system based on an intelligent battery gateway, and relates to the technical field of battery monitoring. The system comprises a sensor module used for collecting voltage, internal resistance, temperature, thermal runaway state and floating charge voltage parameters of a single battery in real time; the intelligent battery gateway comprises a data processing module and an early warning module, and the data processing module carries out fusion analysis on sensor data through an intelligent algorithm, calculates the battery remaining capacity SOC and the state of health SOH and executes an intelligent equalization strategy; and the early warning module generates a multi-stage early warning signal according to the parameter threshold and the anomaly detection model. According to the invention, through a multi-dimensional fusion sensing technology and a dual-drive intelligent algorithm, the aging sign of the internal microstructure of the battery is accurately captured, and high-precision estimation of the residual electric quantity and the health state of the storage battery is realized; and in the aspect of early warning performance, a multi-dimensional linkage detection model and an intelligent early warning mechanism are established, so that the accuracy and timeliness of fault early warning are effectively improved, and the early warning time is greatly advanced.

The invention relates to the technical field of motor train unit battery pack evaluation, and provides a motor train unit battery health state evaluation and life prediction method and system, and the method comprises the steps: building a database through voltage fluctuation and temperature data in a floating charge state, and analyzing a correlation mechanism between target parameters, such as a battery capacity retention ratio and active lithium stock, and internal chemical substance loss; respectively extracting driving behavior characteristics, temperature parameters and electrochemical impedance spectroscopy by adopting second-level, minute-level and hour-level time granularity, and aligning multi-frequency data by utilizing a dynamic time warping algorithm; constructing a graph structure model taking the electrochemical parameters as nodes and cross-level association as edges, and extracting a battery aging characteristic topological relation through a graph neural network; and finally, establishing a prediction model fused with multi-dimensional features, and realizing accurate prediction of the residual life and the capacity recession inflection point of the battery. And the multi-scale characteristics are combined with an electrochemical mechanism, so that the accuracy of battery health state evaluation under a complex working condition is improved.

The invention discloses a coordination control method for energy storage and a flexible multi-state switch in a power distribution network system, and relates to the field of power supply and distribution. The hierarchical control mode is adopted to coordinate the energy storage system and the flexible multi-state switch; the coordination control layer performs working mode selection and switching in a networking operation mode by a centralized controller according to the feeder load power, the charge state of a storage battery, the operation state of each transformer and the position and the number of feeder faults; the control strategy of the flexible multi-state switch can be changed among a constant DC voltage control strategy, a constant power control strategy and a droop control strategy; the control strategy of the storage battery can be switched among constant-current charging control, floating charging control and constant-voltage control; and the feeder load in the equipment control layer can also realize a load switching control strategy. By adopting the coordination control method, the power supply reliability and the power quality of the system can be improved.

According to the four-way vehicle floating charging mechanism and the stereoscopic warehouse provided by the invention, the charging plug and the corresponding movable structure are suspended in the cavity of the frame through the elastic connecting piece, so that the charging plug can be connected with the four-way vehicle in a butt-joint charging process; elastic deformation of the elastic connecting piece is utilized to correspondingly stretch out and draw back along with the butt joint position and the insertion angle of the four-way vehicle body, and the insertion angle of the plug is adjusted to facilitate butt joint charging of the vehicle. After charging is completed, the vehicle body is driven away from the insertion position, butt joint is cancelled, and at the moment, the elastic connecting piece can automatically drive the charging plug to restore to the initial suspension installation position. According to the invention, the elastic part is used for realizing a front-back, left-right and up-down movement space in a certain range for the plug structure, automatic butt joint between the charging plug and the socket can be ensured, and the problem of difficult butt joint of the existing plug charging mode is solved.

The invention provides a robust two-way stacked electrostatic protection circuit, which comprises a two-way stacked electrostatic protection module and a floating charge discharge module, and is characterized in that the two-way stacked electrostatic protection module comprises at least one floating node, and the floating node can accumulate residual charges in the process of normal working of the circuit or electrical characteristic test characterization; the floating charge discharge module is composed of a state control module and a charge discharge module, and the state control module monitors the potential state of a floating node in real time and generates a control signal; the charge discharge module responds to the control signal to conduct and discharge charges accumulated by the floating node, the floating charge discharge module comprises an MOS transistor, the MOS transistor is connected with the first port through the state control module, a source electrode of the MOS transistor is connected with the floating node, and a drain electrode of the MOS transistor is connected with the second port. According to the series high-voltage ESD protection circuit, accumulated charges on the floating node in the series high-voltage ESD protection circuit can be discharged in time.

The invention discloses a real-time acquisition and monitoring device for an electrochemical impedance spectrum of a transformer substation storage battery, and the device comprises a waveform generator which is used as a current excitation source and generates a current excitation signal; the switch switching circuit is used for switching the sections of the current excitation signals received by the battery monomers; the sampling circuit obtains response voltage signals of the single battery based on the current excitation signals of different sections; and the control signal processing circuit performs fast Fourier transform on the response voltage signal, and obtains the electrochemical impedance spectrum of the transformer substation storage battery based on the transformed response voltage processing signal. According to the invention, measurement is carried out in a current excitation and voltage response mode, and electrochemical impedance spectroscopy data of the storage battery in a floating charge state can be acquired on line; a current excitation signal is output by adopting sine waves with the same amplitude at a to-be-tested frequency point, so that the problem of errors in a storage battery electric signal impedance spectroscopy test process is solved; the method can be flexibly and conveniently applied to a transformer substation, and reduces the cost of storage battery electrochemical impedance spectroscopy detection.

The invention relates to the technical field of power station management, in particular to an intelligent management system for a solid-state lead battery energy storage power station. The method comprises the following steps: obtaining an aging parameter of each solid-state lead battery of an energy storage power station; the aging parameters are analyzed, and the control influence of each parameter on the floating charge voltage is determined; determining the health state of each solid-state lead battery according to the control influence; dynamically adjusting a series-parallel topological structure among the plurality of solid-state lead batteries according to the health state; and according to the series-parallel topological structure, floating charge voltage and floating charge current are dynamically distributed. According to the aging parameters, the overcharge risk index and the undercharge risk index, the health state of each solid-state lead battery is evaluated, and stable operation of the whole energy storage power station is ensured. According to the state of health of the solid-state lead batteries, the series-parallel topological structure of the solid-state lead batteries is dynamically adjusted, voltage and floating charge current distribution among the solid-state lead batteries is optimized, and the overall performance and safety of the energy storage power station are improved.

The invention relates to a charging and discharging controller. The charging and discharging controller relates to the technical field of power electronic application. The charging and discharging controller comprises a pre-stage detection circuit, a Boost circuit, a post-stage detection circuit, a control switch and a detection circuit which are arranged on a solar cell panel, after the system is powered on to run the initial program, the running program is selected according to the judgment of the photosensitive element. In the MPPT stage, the controller enables the lead-acid storage battery to receive the maximum output power P of the photovoltaic cell by adjusting the duty ratio D of the switching tube Q. And when the charging current is larger than the overcharge termination current, the storage battery is charged in a constant voltage mode, and meanwhile, the charging current of the storage battery continues to be detected. And when the charging current is lower than 10% of the rated current, switching to a floating charging stage, and charging the storage battery by adopting a constant voltage slightly higher than the voltage of the storage battery in the floating charging stage.

The present application relates to the technical field of secondary batteries, and provides a secondary battery and an electronic device. A positive electrode in the secondary battery provided in the present application comprises lithium cobalt oxide having a lamellar rock salt type structure, the lithium cobalt oxide has a space group R-3m, and the lithium cobalt oxide comprises an Mg element, a Ni element and an Al element, and can synergize with a nitrile compound having a suitable content in an electrolyte, thereby improving the stability of the positive electrode material. The present application can improve the floating charge performance of the secondary battery and reduce the impedance, and thus the secondary battery has good safety and reliability.

The invention discloses a hybrid parallel direct-current power supply system, a charge and discharge control method and a medium, and the system comprises the hybrid parallel direct-current power supply system which comprises a direct-current bus; the power conversion module comprises two groups of three-port converters and a plurality of groups of two-port converters, the three-port converters are connected in parallel with super capacitor banks and a storage battery pack, the storage battery pack comprises a plurality of storage batteries which are connected in series, the two super capacitor banks are connected in series and then connected with the direct current bus, and the two-port converters are connected with the storage battery pack; a three-port converter, wherein the two-port converter is electrically connected with the direct current bus; and the charging and discharging control module is electrically connected with the battery conversion module so as to control the battery conversion module to realize a constant-current, constant-voltage and floating-charge staged charging strategy and an anti-interference discharging strategy. According to the invention, the complementation of the short-time / instantaneous power fluctuation of the super-capacitor compensation direct-current bus and the long-time power fluctuation of the storage battery compensation direct-current bus is realized.

The invention provides a one-way parallel storage battery capacity checking system, and relates to the field of battery capacity checking, all parallel battery pack modules are connected in parallel and are used for receiving floating charge provided by a one-way AC / DC module in a normal state and supplying power to a direct current load in a capacity checking state; the one-way AC / DC module is directly connected with a direct-current load, is connected with each parallel battery pack module through the automatic seamless connection module, and is used for converting alternating current into direct current, supplying the direct current to each parallel battery pack module to maintain a floating charge state and providing stable power for the direct-current load; and the automatic seamless connection module is used for keeping a floating charge state of the parallel battery pack module in a normal state, and automatically switching a current path according to the voltage change of the parallel battery pack module in a capacity checking state, so that the high-power diode is switched on, the corresponding parallel battery pack module stably discharges to a direct-current load, and voltage backflow is prevented.

The invention discloses a communication base station standby battery SOH calculation method based on a PINN model. The method comprises the steps that the surface pressure or pressure intensity value of a battery is collected through a flexible film pressure sensor arranged between battery cells in a standby battery pack; and obtaining an SOH estimation result of the standby battery by using a pre-trained PINN-based SOH prediction model of the standby battery according to the pressure or pressure change value of the standby battery after standing for a preset time from the floating charging end moment to the relaxation stage. According to the method, the problems that a traditional SOH calculation method cannot be applied and errors are too large in the current base station floating charging environment are fully solved, and the precision reaches the level of more than 7 times of the precision of an existing calculation method in the market (the errors are improved to 0.7% from 5%).

The invention discloses a battery equalization method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring initial voltage information of each battery in a battery pack; under the condition that each battery is in a floating charge state and the initial voltage information corresponding to the battery pack meets a first preset condition, performing pre-charging and pre-discharging processing on each battery, and determining a first voltage change rate of each battery in a pre-charging process; determining a target battery from the battery pack; on the basis of first difference information between the first voltage change rates of the other batteries and the target battery, charging or discharging the other batteries, so that in the charging or discharging process, the voltage change rates of the other batteries meet a second preset condition, and the capacity of each battery is balanced; the other batteries are batteries except the target battery in the battery pack. According to the embodiment of the invention, the capacity of the batteries in the battery pack can be balanced, the battery balancing efficiency is improved, and the service life of the batteries is prolonged.

The invention relates to the technical field of storage battery monitoring, and discloses a storage battery operation state visual monitoring method and system based on an electrochemical impedance and polarization internal resistance technology. The method comprises the following steps: sequentially applying sine wave alternating current excitation signals of a plurality of frequency points to a to-be-monitored storage battery, and synchronously drawing a first Nyquist graph; applying pulse discharge excitation in a floating charge state of the to-be-monitored storage battery, and acquiring a current signal and a terminal voltage signal in real time to obtain a polarization internal resistance estimated value; calculating a high-frequency intercept change rate according to the first Nyquist graph and a second Nyquist graph under a corresponding environment condition; and performing visual graphic display on the first Nyquist graph, the impedance parameter set, the voltage response waveform corresponding to the polarization internal resistance estimation value and the comprehensive aging index. According to the invention, a visual and clear battery operation state monitoring result can be provided for operation and maintenance personnel.

The invention discloses a storage battery state sensing and processing device and method based on health degree dynamic grouping, and relates to the technical field of substation direct-current power supply monitoring. The state information of the storage battery is comprehensively sensed through the operation states of floating charge current, uniform charge current, storage battery internal resistance, storage battery voltage and storage battery temperature information; the dynamic grouping module is used for dynamically grouping the health degrees of the storage battery monomers according to the health states of the storage battery monomers monitored in real time; the fault diagnosis module is used for carrying out grouping collaborative response on the faults of the storage battery monomers and judging the fault information of the storage battery monomers; and the fault handling module triggers differential handling measures according to the fault information. The method comprises the following steps: judging fault information of a storage battery monomer; acquired fault information is analyzed and judged, troubleshooting processing is prompted in time, system and operation risks are reduced, and the power supply reliability of the storage battery is improved.

The invention provides a charging control method and a charging control device for a battery management system. The control method comprises the step of selecting to enter a corresponding charging mode based on the charging state of the BMS. The charging modes comprise a large-current charging mode, a floating charging mode, a charging stopping mode and a charging protecting mode. Within the initial set time when the BMS starts to work, the BMS works in the protection charging mode. And in the protection charging mode, charging the battery within a protection charging current threshold value. And after the initial set time is over, selecting to enter one of the protection charging mode, the large-current charging mode, the floating charging mode and the charging stopping mode based on the charging state of the BMS. According to the invention, the problem that the BMS is damaged due to large circulating current generated when a plurality of BMSs with different voltages or capacities are connected in parallel is solved.

This invention proposes a quantitative diagnostic method for internal short circuits in batteries under float charging conditions. The method includes the following steps: S1: Calibrate a float charging voltage curve Map of two normal lithium iron phosphate batteries connected in series under different SOC differences; S2: Randomly collect voltage data of the two lithium iron phosphate batteries under series float charging, observe the battery voltage curves. If the voltage curve does not show a downward trend, it indicates that the battery does not have an internal short circuit fault; if the voltage curve shows a downward trend, it indicates that the battery has an internal short circuit fault; S3: When an internal short circuit occurs, based on the voltage curve Map calibrated in S1, find the intersection point between the faulty battery voltage curve in S2 and the Map, and record the time and voltage of the intersection point; S4: Record the SOC difference ΔSOC corresponding to two intersection points in the Map, and the time difference ΔT between the two intersection points, and calculate the leakage current I based on ΔSOC and ΔT. leak S5: Calculate the average voltage U between the two intersection points in S4, and calculate the short-circuit resistance R = U / I according to Ohm's law. leak .

Disclosed is a substrate support unit capable of addressing problems caused by floating charges accumulated therein. The substrate support unit includes an adsorption plate configured to adsorb and support a substrate disposed on an upper surface thereof and provided therein with a heater assembly configured to heat the substrate, a cooling plate disposed below the adsorption plate and provided therein with a coolant channel configured to allow a coolant to circulate therethrough, an electric circuit board electrically connected to the heater assembly and configured to control the heater assembly, and a discharge unit electrically connected to the electric circuit board via a discharge line connected to ground and including a protection module including surge protection components.

The invention discloses a suspension type charging device and an in-situ detection system thereof, and relates to the technical field of charging piles, the suspension type charging device comprises a charging pile body, a detection robot and a suspension bag; the detection robot is arranged at the bottom of the charging pile body in a detachable connection mode and used for walking on the seabed and conducting in-situ detection. The suspension bag is of an annular bag body structure and is used for providing buoyancy to enable the charging pile body to float on the sea surface or suspend at the water bottom; the charging pile body is fixed to the middle of the suspension bag and used for charging the detection robot. When the detection robot sinks to the seabed for in-situ detection, the detection robot is electrically connected with the charging pile body through the charging wire for charging; the technical effects that buoyancy adjustment is accurate, flexibility is improved, offshore attitude stability is improved, functions are diversified, and suspension stability is improved during offshore charging can be achieved.

The invention provides a super capacitor health state estimation method and system and a storage medium, and relates to the technical field of super capacitors. The method is executed under the condition that complete charging and discharging circulation does not need to be conducted on the super capacitor. The method comprises the following steps that the real-time working temperature and working voltage of the super capacitor are obtained; the instantaneous aging rate of the super capacitor is determined based on the working temperature and the working voltage, and the instantaneous aging rate is inversely proportional to the equivalent life determined by the working temperature and the working voltage; performing time integration on the instantaneous aging rate to obtain an accumulated aging amount; and calculating a current health state value of the super capacitor according to a proportional relation between the accumulated aging amount and a preset end-of-life threshold value. Accurate estimation of the health state of the super capacitor is realized under the condition that complete charge-discharge circulation is not needed, and the limitation of a traditional capacity measurement method in a long-term floating charge application scene is effectively overcome.

The application discloses a battery charging control method, a charging pile, a charging cabinet and a charging platform, and belongs to the technical field of battery charging control. The method comprises the following steps: in the case that the battery charging enters a floating charging stage, the real-time charging power of the battery is acquired; the real-time charging power is matched with a plurality of full-charge stopping parameters to obtain matched full-charge stopping parameters, wherein the full-charge stopping parameters comprise a full-charge stopping power interval and a remaining floating charging time; when the real-time charging power is not greater than the maximum value of the matched full-charge stopping power interval and the floating charging time is greater than the remaining floating charging time, it is determined that the battery is fully charged and stops charging; otherwise, the charging is continued. The application realizes accurate judgment of the full-charge state of the battery by monitoring the charging power in real time and dynamically matching the corresponding full-charge stopping parameters, improves the charging efficiency and safety, and adapts to the charging demands of different types of batteries.

The invention relates to the technical field of control and protection of direct-current operation power supply systems of power plants and transformer substations. The invention discloses a power plant direct-current power supply sodium-ion battery system health state evaluation method and system. The method comprises the following steps: S1, carrying out online extraction on safety boundary core parameters; s2, constructing an electrochemical-electrical-time three-dimensional health state vector; s3, performing system safety action success rate prediction and risk assessment; according to the invention, through multi-dimensional parameter fusion evaluation, ohm and polarization internal resistance are accurately separated through a direct current pulse method, and the main cause of aging can be diagnosed; on-line and undisturbed polarization state monitoring is realized by utilizing floating charging harmonic analysis, the methods fully utilize the operation characteristics of a power plant direct current system, the diagnosis depth and precision are far better than those of a traditional method, and the health state of a battery is comprehensively reflected.

This application relates to a secondary battery and an electronic device. Specifically, this application provides a secondary battery comprising: a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive electrode current collector and an insulating layer and a positive electrode material layer disposed on the positive electrode current collector. The insulating layer comprises boehmite, the positive electrode material layer comprises lithium iron phosphate and lithium manganese oxide, the lithium iron phosphate comprising zirconium and boron, and the lithium manganese oxide comprising antimony. The electrolyte comprises lithium difluorophosphate. This application not only improves the float charging safety of the secondary battery but also reduces the particle breakage rate.

A system for charging electric vehicles on or near water includes a charging station and a shore station. The charging station comprises an aquatic structure which can be attached and / or moored to a shore and / or the ground / bed of the body of water, and receptacles that are assembled around the aquatic structure and connected to it. The receptacles are preferably all water-proof, and collectively house various components for allowing the recharging of an electric vehicle. The shore station is remote and mechanically disconnected from the charging station. The shore station is at least partially, if not entirely, above water and attached to the shore of the body of water, for example to a quayside. The shore station includes communication means that complement the communication means of the charging station.

The invention discloses an electrochemical device and an electronic device. The electrochemical device comprises a positive pole piece, a negative pole piece, an isolating membrane and electrolyte, the isolating membrane is arranged between the positive pole piece and the negative pole piece, and the isolating membrane comprises a base membrane and a first coating at least arranged on one side of the base membrane; the first coating comprises a fluorine-containing polymer, and the layered thickness of the fluorine-containing polymer is 2.2 nm to 4 nm; the electrolyte comprises an additive, and the additive comprises a phosphorus-containing additive. The safety performance at high temperature, the low-temperature floating charge performance and the intermittent cycle performance can be improved.

The utility model relates to the technical field of electronic equipment accessories, in particular to a floating charging wire, a charging base and a head display assembly. The floating charging line comprises a first end, a line body and a second end, wherein the first end, the line body and the second end are connected in sequence; the first end comprises a shell, a cavity is formed in the shell, a movable block is arranged in the cavity, the end, connected with the first end, of the defining line body is a first connecting end, the first connecting end extends into the cavity to be connected with the movable block, and the first connecting end can move in the direction close to or away from the second end along with the movable block. According to the utility model, the second end can freely extend, retract and float, so as to meet the charging requirements of different distances at different heights. The height of the floating charging line can be adjusted for adaptation according to charging ports with different heights within a certain range, dislocation is avoided, and the charging process is more stable and reliable.

The utility model discloses a control system of an energy storage system, which comprises an upper computer and a battery monitoring unit, and the battery monitoring unit is in communication connection with the upper computer and is used for monitoring the voltage of a battery cell in the energy storage system; each battery monitoring unit comprises a microcontroller and a discharging unit, the upper computer is in communication connection with the microcontroller and sends the voltage of a monitored target battery cell to the microcontroller, and the microcontroller transmits the voltage monitoring result of the target battery cell back to the upper computer; the discharging unit is electrically connected with the microcontroller and the target battery cell, and the discharging unit receives a control signal of the microcontroller and discharges the target battery cell; the control signal is issued by the microcontroller after receiving an equalization instruction of the upper computer, the equalization instruction is obtained when the output result is 1 after the upper computer receives the voltage monitoring result, and the output result is 1 which indicates that the target battery cell is in a floating charge state and the voltage of the target battery cell is greater than a preset threshold value. The utility model aims to maintain the balance state of the battery voltage and further prolong the service life of the battery.

The present application provides a charge and discharge control circuit for controlling the charging and discharging of a battery, including a first boost circuit, a second boost circuit and a charge and discharge switching circuit; the low potential ends of the first boost circuit and the second boost circuit are both connected to the positive electrode of the battery; the first control end of the charge and discharge switching circuit is connected to the high potential end of the first boost circuit, and the second control end is connected to the high potential end of the second boost circuit; the charge and discharge switching circuit conducts a current path from the positive electrode of the battery to the charge and discharge positive electrode when the voltage at the high potential end of the first boost circuit is higher than a preset threshold voltage, and conducts a current path from the charge and discharge positive electrode to the battery positive electrode when the voltage at the high potential end of the second boost circuit is higher than the threshold voltage. The charge and discharge control circuit provided by the present application avoids the problem of floating charge and discharge negative electrode in the charge and discharge negative electrode control method by performing charge and discharge control between the positive electrode of the battery and the charge and discharge positive electrode.

The embodiment of the invention provides a power supply circuit and equipment for a transfer station system, the circuit comprises a power supply module, a control module and a floating charge management module, and the power supply module is connected with the floating charge management module through the control module; the power supply module comprises a main power supply module and an auxiliary power supply module, and the main power supply module and the auxiliary power supply module are connected in parallel; the control module is used for selecting any one of the main power supply module and the auxiliary power supply module to supply power to the transfer station system according to the power supply condition of the power supply module; and the floating charge management module is used for charging the auxiliary power supply module based on the voltage output by the main power supply module when the main power supply module supplies power to the transfer station system, and aims to provide a plurality of power supply paths so as to ensure that a stable and reliable power supply can be provided under various conditions.

The invention provides the double-electric-layer capacitor electrolyte with high energy density and cost advantages, the additive of the electrolyte contains small cations to increase the degree of freedom of salt ions and reduce the viscosity, and the anion part contains hydrophobic groups and oxyphilic groups of oxyphilic functional groups on the surface of activated carbon to reduce the contact between water molecules and an electrode interface, so that the service life of the double-electric-layer capacitor is prolonged, and the service life of the double-electric-layer capacitor is prolonged. And furthermore, the gas production rate of the electrolyte is reduced, the high-rate performance is adapted, the capacity exertion is increased, and the characteristic of low cost is compatible. The capacity retention rate of an EDLC battery cell containing the preferable additive is increased to 78.2% (19.3%) from 58.9% of a blank sample after 1000 circles of 125A large-current circulation (the current of a conventional application scene of the capacity battery cell is 25A), the capacitance retention rate is increased to 78.2% (19.3%) from 58.9% of the blank sample after 1500h of high-temperature floating charge at the voltage of 65DEG C and 2.9 V, and the internal resistance growth rate is increased to 78.2% (19.3%) from 58.9% of the blank sample. According to the present invention, the preferable additive can significantly improve the capacity, such that the injection amount of the cell electrolyte can be reduced so as to reduce the production cost on the premise of maintaining the capacity unchanged, the safety is high, the process change is small, the electrochemical performance is significantly improved, and the commercialization requirement can be well met.