87 results about "Floating charge" patented technology

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 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 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 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 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 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.

The disclosure provides a charging control method and a charging control apparatus for a battery management system. The control method includes: selecting, based on a charging state of the BMS, to enter a corresponding charging mode. The charging mode includes a high-current charging mode, a float charging mode, a stop charging mode, and a protection charging mode. During an initial set time after the BMS starts operating, the BMS operates in the protection charging mode. In the protection charging mode, a battery is charged within a protection charging current threshold. After the initial set time ends, one of the protection charging mode, the high-current charging mode, the float charging mode, and the stop charging mode is selected for entry based on the charging state of the BMS. The disclosure resolves a problem of damage to a plurality of BMSs with different voltages or capacities caused by a relatively high circulating current generated when the BMSs are connected in parallel.

The invention discloses a control method and system for prolonging the service life of a super-capacitor system, and the method comprises the steps: data collection and processing: collecting the operation parameters of each single body in a super-capacitor module in real time; health state SOH calculation: dynamically calculating the comprehensive health state SOH of each single body based on the collected operation parameters in combination with pre-calibrated reference parameters; determining a target voltage, querying a pre-established database according to the currently calculated SOH value of the single body and the currently measured temperature value of the environment where the single body is located, and determining the target floating charge voltage of the single body under the current working condition; and performing adaptive equalization control, triggering a corresponding equalization action according to the deviation, and enabling the single voltage to approach to Utarget. Accurate balance based on the health state is achieved, differential target voltages are dynamically set for monomers with different attenuation degrees by introducing the two-parameter SOH fusing the capacity and the internal resistance as a core decision basis, accelerated aging is fundamentally avoided, and the overall service life of the module is prolonged.

The invention relates to a secondary battery and an electronic device. Specifically, the secondary battery provided by the invention comprises a positive electrode, a negative electrode and an electrolyte, the positive electrode comprises a positive electrode current collector, and an insulating layer and a positive electrode material layer which are arranged on the positive electrode current collector; the insulating layer comprises boehmite, the positive electrode material layer comprises lithium iron phosphate and lithium manganate, and the electrolyte comprises lithium difluorophosphate. According to the invention, the floating charging safety of the secondary battery can be improved, and the particle breaking change rate can be reduced.

The utility model provides a battery charging protection circuit, an explosion-proof battery and electronic equipment. The battery charging protection circuit comprises an overvoltage protection module and a temperature protection module, the overvoltage protection module comprises at least one overvoltage protection circuit, and the overvoltage protection circuit comprises a first comparison circuit and a first switching device; the temperature protection module comprises at least one temperature protection circuit, the temperature protection circuit comprises a high-temperature protection circuit and a low-temperature protection circuit, and the high-temperature protection circuit and the low-temperature protection circuit each comprise a second comparison circuit, a thermistor and a second switching device. Potential risk factors caused by overvoltage in the charging process are avoided through the overvoltage protection circuit, it is guaranteed that the battery is charged within the normal temperature range through the temperature protection circuit, the risks of floating charging, bulging, short circuit and the like of the battery are avoided, and therefore the charging safety of the explosion-proof battery can be effectively improved.

The invention discloses a secondary battery and an electric device, and belongs to the technical field of batteries. According to the secondary battery provided by the invention, the propionate organic solvent containing propyl propionate and / or ethyl propionate is added into the electrolyte, and meanwhile, the mass percentage a of the silicon-carbon material in the negative electrode active material, the mass percentage b of the hydrogen element in the silicon-carbon material and the mass percentage c of the propionate organic solvent in the electrolyte are controlled; on one hand, the lithium intercalation kinetics of the silicon-carbon material can be accelerated and the transmission capability of lithium ions can be improved on the basis of effectively reducing the side reaction between the silicon-carbon material and an electrolyte under the conditions of normal temperature and high temperature, so that the internal resistance of the secondary battery is reduced, and the cycle performance of the secondary battery under the conditions of normal temperature and high temperature is improved; on the other hand, the excessive increase of the viscosity of the electrolyte under the high voltage condition can be relieved, and the floating charge performance of the secondary battery under the high voltage condition is improved.

The present application relates to the technical field of battery pack assessment for electric trains, and provides a method and system for battery health status assessment and life prediction for electric trains. The method includes establishing a database using voltage fluctuation and temperature data in a floating charge state, analyzing the correlation mechanism between target parameters such as battery capacity retention and active lithium inventory and internal chemical substance loss; extracting driving behavior characteristics, temperature parameters, and electrochemical impedance spectra at three time granularities, namely, seconds, minutes, and hours, and aligning multi-frequency data using a dynamic time warping algorithm; constructing a graph structure model with electrochemical parameters as nodes and cross-level associations as edges, and extracting the topological relationship of battery aging characteristics through a graph neural network; and finally establishing a prediction model that integrates multi-dimensional features to achieve accurate prediction of the remaining battery life and capacity decay inflection point. Combining multi-scale features with electrochemical mechanisms improves the accuracy of battery health status assessment under complex working conditions.

The application relates to a lithium battery positive electrode additive resistant to floating charging and application thereof in preparation of high-energy batteries. The lithium battery positive electrode additive resistant to floating charging comprises a composite of 1-azaphenol thiazine and at least one of sodium fosinopril, lithium fosinopril or potassium fosinopril. The additive can significantly improve the interface stability of the positive electrode under high-voltage floating charging, enables the battery adopting the commercialized positive electrode to realize a high-energy density of >500 Wh / kg and a long cycle life in a conventional electrolyte, and has excellent high-rate performance, and is suitable for high-demand scenes such as satellite power sources and energy storage systems.

The invention relates to a power supply side control method of a charging loop of mobile equipment, the charging loop, a charging device and a charging wire, and is suitable for the charging loop, and the method comprises the steps: recognizing the connection state of the mobile equipment and a power supply; when the access is identified, acquiring battery electric quantity information; on the basis of a comparison result of the information and a preset electric quantity threshold value, a switch module on the power supply side is controlled to switch the on or off state of the charging loop; in the open-circuit state, continuously identifying the connection state; and when the equipment is identified to be still connected, the switch module is controlled to be switched on again based on a preset power supply condition so as to execute power supply operation. According to the invention, the problem of how to actively and thoroughly cut off the charging connection at the power supply side in the prior art is solved, so that the problem of floating charge aging of the battery caused by long-time connection of the power supply after the battery of the mobile equipment reaches the required electric quantity is solved.

The utility model 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 invention provides a data processing method and device for adaptive adjustment of charging and discharging parameters of a super capacitor, and is applied to the technical field of data processing. According to the method, a full-process self-adaptive system is constructed around the requirement of a variable pitch backup power supply of a wind turbine generator set: firstly, real-time state data of a super capacitor are collected, and overall operation real-time data and preliminary evaluation are generated through anomaly elimination and trend analysis processing; setting a multi-level threshold value by combining the environment temperature and the charging and discharging frequency, applying capacitance characteristic constraint and a variable pitch safety target, and generating an alarm and state report; the charging current is automatically adjusted according to the alarm level, the floating charge voltage is adapted, and parameters are dynamically adjusted to form an automatic scheme; mining a historical data capture performance attenuation rule, predicting a future state and optimizing parameters; finally, multi-link information is integrated, evaluation dimensions and indexes are set, comprehensive evaluation information is generated, the stability of the variable pitch system is guaranteed, and the operation and maintenance cost is reduced.

The invention relates to the technical field of zinc-nickel batteries, and discloses a multiphase high-entropy alloy additive for a zinc-nickel battery and a preparation method of the multiphase high-entropy alloy additive, and the multiphase high-entropy alloy additive is composed of Zn, Ni, Al, Sn, In and Sb elements according to a preset atomic ratio. The preparation method comprises the following steps: preparing a mother alloy cast ingot from metal raw materials in a vacuum induction melting furnace through a staged temperature control melting and multiple remelting process; and crushing the cast ingot, and carrying out high-energy ball milling under the protection of an inert atmosphere to prepare the additive powder. The additive is applied to the negative electrode of the zinc-nickel battery. The additive effectively inhibits dendritic crystal growth and hydrogen evolution side reaction of a zinc negative electrode by using a high-entropy structure, a multiphase synergistic effect and a corrosion resistance characteristic, and solves the technical problems of poor high-rate performance and short floating charge life of a zinc-nickel battery. According to the zinc-nickel battery prepared by adopting the additive, the high-rate cycle life and the high-temperature floating charge equivalent life of the zinc-nickel battery are both prolonged, and the comprehensive electrochemical performance is excellent.

An apparatus may include a DC to DC converter that converts a high voltage level from a battery pack to a relatively lower voltage level for various components of a vehicle. The DC to DC converter may provide an alternate power supply in addition to a battery that is separate from the battery pack. The battery pack and the DC to DC converter may be used to supply power, instead of the battery, during a sleep mode of a vehicle. Further, the DC to DC converter can supply power to float charge the battery, thus minimizing cycling of the battery. The DC to DC converter and the battery may provide a redundant, or backup, power source for a vehicle.