1815 results about "Charge voltage" patented technology

The invention discloses a control system for lithium battery power management, and relates to the field of lithium battery control, and the system comprises a voltage input module which is used for externally connecting voltage and supplying power to a battery power supply module and a time delay module; the battery power supply module is used for charging the battery; receiving the battery voltage information, and adjusting the voltage output to the battery according to the battery voltage; the battery module is used for a battery to store electric energy; compared with the prior art, the system has the beneficial effects that the output voltage of the battery power supply module is adjusted through the feedback module, the output voltage of the battery power supply module is relatively large at the beginning, and the charging voltage is reduced along with the increase of the battery voltage, so that a quick charging effect is constructed; whether battery charging is abnormal or not is detected through the time delay module and the charging fault detection module, the battery power supply module is adjusted to perform constant-voltage charging when charging is abnormal, and the battery charging effect is guaranteed.

The invention provides a vehicle charging control method, a vehicle charging system and a vehicle. The vehicle charging control method comprises the steps that after a first charging port of a vehicle is connected with a first charging pile, first insulation detection voltage of the first charging port is obtained; and according to the magnitude relationship between the first insulation detection voltage and the highest allowable charging voltage of the vehicle, controlling a boost charging circuit to work, and performing boost conversion on the charging voltage provided by the first charging pile to charge the power battery, or the direct charging circuit is controlled to work to receive the charging voltage provided by the first charging pile to directly charge the power battery. According to the vehicle charging control method, any charging port in the vehicle charging system can be compatible with the high-voltage charging pile and the low-voltage charging pile.

A method for estimating the state of health of lithium-ion batteries considering user charging behavior is provided. Firstly, data during the cycle charging process of the actual vehicles are collected, and it is analyzed. Then, the charging process data is applied to extract health features. The obtained health features are used to establish a state of health estimation model, and the established model is used to estimate the state of health of the battery. It involves reading the charging data, analyzing the frequency and occurrence of the start charging voltage and stop charging voltage, integrating them into a heat map, and drawing the IC curve of the charging and discharging process. This enables any charging behavior to extract the health features of battery aging, and predicts the health values of the battery, thus completing the estimation of the state of health for lithium-ion batteries.

The invention relates to the technical field of lithium ion batteries, and discloses a lithium battery health state estimation method fusing local and global dependency information. The method comprises the following steps: firstly, collecting capacity increment curve data generated in the charging process of a battery, performing index sliding filtering on an extracted capacity increment curve, and extracting tangent angle characteristics of a voltage curve in combination with information of the capacity increment curve and a charging voltage curve, so as to solve the problems that an IC curve peak value disappears and data is distorted after filtering. And then, fusing a long short-term memory (LSTM) network and an Informer model, constructing a parallel model structure, respectively extracting local dependency and global information in a battery recession process, and realizing comprehensive capture of the local and global dependency information of the battery. And then, a self-attention mechanism layer is added into the model to fuse local and global time sequence information, so that an LSTM-Informer-SA battery health state estimation model is established, and lithium ion battery SOH estimation is realized based on the model.

This application relates to the technical field of electric vehicles, and in particular, to charging systems and methods. An example charging system includes: a low-voltage battery capable of supplying power to a low-voltage electrical device of a vehicle; a power battery module; a direct current-to-direct current (DC-DC) converter capable of receiving a voltage supplied by the power battery module in response to at least that a positive relay and a negative relay of the power battery module are closed, and converting the voltage into a charging voltage of the low-voltage battery to charge the low-voltage battery; and a DC-DC controller electrically connected to the low-voltage battery and capable of monitoring a voltage of the low-voltage battery in response to at least that the vehicle is in a dormant state.

The invention relates to the technical field of power allocation, and discloses a power allocation method and system for a liquid cooling charging pile, and the method comprises the steps: collecting the charging power data, liquid cooling temperature data, charging voltage data, charging current data and liquid cooling flow data of the liquid cooling charging pile, and carrying out the signal processing, obtaining a charging operation standard data set; performing non-uniform time delay characteristic analysis on the charging operation standard data set, and calculating time sequence correlation through a joint mutual information criterion to obtain charging power time characteristic data; inputting the charging power time characteristic data into a charging power prediction model for charging power prediction to obtain charging power prediction data; and performing proportional robust diffusion recursion operation on the charging power prediction data, and performing parameter optimization in combination with a hyperbolic cosine function to obtain a dynamic power control parameter. According to the invention, the robustness of power allocation is improved, and the power allocation of the liquid cooling charging pile is more accurate and efficient.

The invention provides a gradient screening method for retired lithium batteries based on multi-modal information fusion, and belongs to the field of battery screening, and the method comprises the steps: S1, obtaining the charging voltage data of the retired lithium batteries in the charge-discharge cycle of the retired lithium batteries; s2, carrying out dimension reduction processing on the charging voltage data to obtain dimension-reduced voltage data, converting the dimension-reduced voltage data into polar coordinate data, converting the polar coordinate data into a coded image by adopting a Gramb angle field, and inputting the coded image into a ViT model to extract image features; s3, inputting the dimension reduction voltage data obtained in the step S2 into an LSTM model to extract time sequence features; and S4, after the image features and the time sequence features are fused to obtain fusion features, according to the fusion features, the types of the lithium batteries are obtained by adopting an SVM, and then gradient screening of the retired lithium batteries is realized. According to the method, complex feature engineering can be avoided, meanwhile, limitation of respective modes is made up, and high-precision gradient screening of the retired lithium batteries is achieved.

The invention belongs to the technical field of display driving, and particularly relates to a gate driving circuit and a display panel, the gate driving circuit comprises N cascaded GOA circuit units, and the nth GOA circuit unit comprises a control voltage maintaining module used for maintaining the control voltage of the n + 1th GOA circuit unit under the action of the pre-charging voltage on the control voltage end of the (n + 1) th GOA circuit unit, maintaining the control voltage end of the nth GOA circuit unit at a first target voltage; the output module is used for outputting a gate driving signal under the action of a first target voltage on a control voltage end and a clock signal output by a clock signal end; the stage transmission module is used for outputting a stage transmission signal for pre-charging the control voltage end of the (n + i) th stage GOA circuit unit under the action of a target voltage on the control voltage end and a clock signal output by the clock signal end; the problem that the potential of the Q point is unstable due to leakage current is solved, the falling edge time of the gate driving signal can be greatly shortened, and the display effect of a picture is improved.

The invention relates to the technical field of storage battery charging, in particular to a multi-stage power storage battery charging control method and system based on intelligent dynamic adjustment. According to the invention, the pre-charging current is determined through the battery health state value and the initial SOC of each single battery, so that the single batteries are pre-charged through the pre-charging current which is individually designed, and after the pre-charging stage is finished, the constant-current charging current is determined according to the first SOC so as to carry out constant-current charging. The constant-current charging current is made to be matched with the current state of each single battery, then a second SOC of each single battery after constant-current charging is finished is obtained, after it is indicated that the single battery is charged to be close to the full-charge state through the second SOC, a constant-voltage charging voltage is obtained for the second SOC of the single battery to conduct constant-voltage charging, and meanwhile electric quantity transferring is conducted on the single battery; finally, whether the electric quantity of the battery pack is balanced or not is judged, and if the electric quantity is not balanced, the SOC difference between the single batteries is gradually eliminated by continuously optimizing the charging process.

A system detects degradation of battery health due to fast-charging and controls charging of the battery and / or provides indications of battery health while fast-charging. The system includes remove a battery charging circuit that controls a charging voltage waveform to supply charging current to a battery and a detection circuit that monitors a rate of change of the charging current and controls the charging voltage waveform responsive to an output of the detection circuit.

The invention relates to the technical field of data processing, and provides an intelligent optimization method and system for a battery charging strategy, and the method comprises the steps: obtaining the historical charging and discharging data, environment parameter data and battery health state data of a battery, generating a battery operation data set, constructing a multi-dimensional charging characteristic spectrum, carrying out the weighted analysis of different charging characteristics, and carrying out the calculation of a multi-dimensional charging characteristic spectrum. Performing dynamic adjustment on the charging current and the charging voltage of the battery based on the charging strategy to obtain charging data; and updating the charging characteristic spectrum according to the charging data, and readjusting the charging strategy based on the updated charging characteristic spectrum to obtain an optimized charging strategy. Through a multi-iteration charging strategy, charging current and charging voltage are dynamically adjusted through real-time data in a complex and changeable charging environment, and the problem that the optimization of the charging efficiency and the service life of the battery is insufficient due to the fact that self-adaptive adjustment cannot be achieved in the face of the complex and changeable charging environment and different health states of the battery is solved.

The invention discloses a radio frequency energy and solar energy hybrid energy supply system and device, and belongs to the field of energy collection and energy supply, and the system comprises a hybrid energy collection circuit and an output voltage stabilizing circuit. The hybrid energy collection circuit comprises a solar energy collection circuit and a radio frequency energy collection circuit. And after the solar energy collection circuit and the radio frequency energy collection circuit are connected with two diodes, the two diodes are connected in parallel to the output voltage stabilizing circuit. The two energy sources can be collected and managed at the same time, the efficiency of the energy collection system is improved, and the stability of the system is improved. Meanwhile, the system is provided with a self-starting module, an external power supply is not needed, the cost is reduced, and the compatibility and flexibility of the system are improved. The level output value can be flexibly set by adjusting the resistance value of the resistor, and the charging voltage of the super capacitor can also be set by the resistance value, so that the flexibility of the system is improved.

The invention provides a self-adaptive charging power supply control method and system, and relates to the field of power supply control, and the method comprises the steps: capturing a voltage and temperature time sequence signal of a battery in real time through a high-precision sensor, carrying out the multi-scale time sequence modeling of the dynamic characteristics of the battery through a time convolution network in combination with the charging behavior data of a user, and obtaining a multi-scale time sequence model; and extracting high-frequency nonlinear fluctuation characteristics of the battery state. Meanwhile, semantic association coding is performed on the user behavior data, and a mapping relation between the user demand and the battery health state is established. Then, a cross-modal feature interaction mechanism is introduced, dynamic coupling analysis of the battery state and the user requirement is achieved, finally, a charging voltage regulation and control instruction which is optimally matched with the current battery state and meets the user scene requirement is generated through a decoder, charging parameters are dynamically adjusted, and collaborative optimization of the charging efficiency, the battery life and the personalized scene is achieved.

The invention relates to a battery charging optimization method and device, a vehicle and a storage medium. The method comprises the steps of obtaining a current battery health value, a battery nominal capacity, a battery theoretical cut-off charging voltage and a current user endurance demand based on a battery charging demand; determining a target charging electric quantity based on the current user endurance demand, the battery nominal capacity and the current battery health value, and determining a target charging cut-off voltage based on the battery theoretical cut-off charging voltage; and generating a charging optimization strategy according to the target charging electric quantity and the target charging cut-off voltage, and charging the battery by using the charging optimization strategy. Therefore, the charging amount and the charging cut-off voltage are properly reduced on the basis of the battery health degree, the battery temperature and the vehicle using requirement of a user, and the problem that the cycle life of the battery is seriously shortened due to the fact that the battery is charged according to fixed charging parameters and the actual aging state of the battery is not considered in the prior art is solved; and the battery capacity fading rate can be reduced on the premise of meeting the vehicle use requirement of a user.

The invention provides a system and a method for detecting and preventing early explosion of an electronic detonator chip. The method comprises the following steps: S1, detecting a current charging voltage; s2, selecting a reference voltage, comparing the reference voltage with the current charging voltage, and obtaining a comparison result based on a comparator; and S3, taking an early explosion prevention measure according to a comparison result. According to the invention, the multi-gear reference circuit and the comparator are used, high-precision detection of voltage change of the energy storage capacitor is realized, and the digital control logic circuit is matched to detect that the voltage of the energy storage capacitor drops abnormally and rapidly, so that an early explosion symptom is identified; by arranging the bypass switch, the energy storage capacitor is short-circuited to the ground when an early explosion symptom is recognized, so that energy of the energy storage capacitor is not released through the ignition element, early explosion is prevented, and good practicability is achieved.

The present disclosure includes a display panel and a display apparatus. The display panel includes a pre-charge circuit, a data-signal line and a pixel circuit, where the pre-charge circuit is electrically connected to the pixel circuit through the data-signal line; and before a data signal is written into the pixel circuit, the pre-charge circuit provides a pre-charge voltage signal to the data-signal line, and the data-signal line is charged through the pre-charge voltage signal.

A method of battery capacity estimation including: obtaining a charging current, charging voltage, charging time, and charging voltage interval of a battery being estimated; determining a charging current interval and a charging time interval based on the charging current, the charging voltage, and the charging time, where the charging current interval and the charging time interval correspond to the charging voltage interval; obtaining training features for model training, where the training features include training electrochemical features and training time domain features; determining actual features of the battery being estimated based on the charging voltage interval, the charging current interval, the charging time interval, and the training features, where the actual features include actual electrochemical features and actual time domain features; and estimating, based on the model and the actual features, an actual capacity of the battery being estimated.

The invention provides a solvent-free UV dielectric insulation protective coating as well as a preparation method and application thereof. The high-surface-energy and high-glass-transition-temperature UV-curable coating is prepared by combining flexible modified polyurethane acrylate, flexible acrylate, rigid acrylate with high glass transition temperature, a high-functionality acrylate cross-linking agent, methyl methacrylate with high dilutability and high glass transition temperature as well as a plurality of photoinitiators, auxiliaries, pigment and filler powder and the like. The invention relates to a dielectric insulation protective coating with high adhesive force. The prepared coating is a solvent-free 100% solid single component, is complete in mixing and dissolving, convenient to construct, high in light curing energy utilization rate, high in production efficiency and suitable for large-scale automatic large-scale flow line production, and compared with PSA back glue used for a traditional PET blue film, the outer surface of the coating has higher surface energy, and the coating has the advantages of being high in light curing energy utilization rate and high in production efficiency. And the film has considerable dielectric insulation performance and good edge covering protection performance, and meets the development requirements of a higher charging voltage platform of a fast-charging electric vehicle in the future.

The invention provides a sodium supplementing material and a preparation method thereof, a positive pole piece and a sodium ion battery. The sodium supplementing material comprises an organic sodium supplementing agent body, a conductive agent and a composite catalyst, wherein the conductive agent and the composite catalyst are at least partially coated in the organic sodium supplementing agent body; the composite catalyst has a core-shell structure, a core layer of the core-shell structure comprises a metal oxide catalyst, a shell layer of the core-shell structure comprises an electrochemical stable material, and the electrochemical stable material has electrochemical stability under charge-discharge test conditions of a first-circle charge voltage of 4.1 V to a first-circle discharge voltage of 1.5 V and a cyclic charge voltage of 3.5 V to a cyclic discharge voltage of 1.5 V.

The invention provides an intelligent charging system and method based on illumination intensity adaptive adjustment. The intelligent charging system and method are applied to a photovoltaic energy storage system comprising a photovoltaic cell, a DC-DC converter, a storage battery charging mode control module and a storage battery. The method comprises the following steps: firstly, acquiring current illumination intensity, an incident light angle and a working environment temperature, and sending the current illumination intensity, the incident light angle and the working environment temperature to a photovoltaic cell and storage battery charging mode control module; the photovoltaic cell outputs corresponding voltage and current based on the parameters and a temperature compensation mechanism; and the storage battery charging mode control module converts the output of the photovoltaic battery into charging voltage and current for the storage battery, and dynamically determines a constant-voltage or constant-current charging mode in combination with the illumination intensity, the environment temperature, the incident light angle and the charging parameters, so that the self-adaptive charging of the storage battery is realized. Through multi-parameter cooperative adjustment, the charging mode is accurately matched with the environment condition and the storage battery state, and the charging efficiency and the system stability can be improved.

The invention discloses a battery charging and discharging power self-regulation control circuit, which relates to the technical field of battery control, and comprises a power supply module, a micro-control module, a voltage sampling and comparison module, a battery charging and discharging power self-regulation control module, a battery charging and discharging power self-regulation control module, a battery charging and discharging power self-regulation control module and a battery charging and discharging power self-regulation control module, the power regulation module compensates the direct-current electric energy, the battery module stores energy, the power regulation module and the direct-current electric energy are superposed and supply power to the battery module, during the discharging period, according to the voltage comparison condition, the power regulation module carries out voltage compensation processing on the battery module, and the battery module directly supplies power to the discharging module; and the power regulation module performs voltage balance control on the battery module. The battery charging and discharging power self-adjusting control circuit can prolong the service life of the battery, improve the charging and discharging efficiency, reduce the electric energy loss of the power adjusting module, improve the energy utilization rate and provide higher charging voltage.

The invention discloses a lithium ion battery adaptive charging regulation and control system applied to an outdoor power supply, relates to the technical field of charging supervision, and realizes flexible adjustment of a charging strategy according to changes of real-time temperature and internal resistance. According to the invention, a normal voltage change interval and a normal internal resistance change interval under different charging and discharging times are obtained through historical outdoor charging records, and a real-time voltage value, a real-time temperature value and a real-time internal resistance value of a target lithium ion battery are collected at the same time; a plurality of pairs of normal voltage change intervals and normal internal resistance change intervals are matched according to the real-time voltage value and the real-time internal resistance value, then voltage interval segments are intercepted from all the normal voltage change intervals according to the real-time voltage value, all the voltage interval segments are adjusted through the real-time temperature value, and then a charging voltage curve is generated and executed.

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 provides a focusing shock wave capacitor charging system powered by low-voltage direct current, which comprises a direct current source, a boost charging module, a charging voltage acquisition module and an isolation charging control module, and is characterized in that the direct current source is connected to the input end of the boost charging module; a first charging output end of the boost charging module is connected to one end of a high-voltage capacitor in the shock wave generator, and a second charging output end of the boost charging module is connected to the other end of the high-voltage capacitor; the input end of the charging voltage acquisition module is connected to the charging signal acquisition end of the boost charging module, the output end of the charging voltage acquisition module is connected to the input end of the isolation charging control module, and the output end of the isolation charging control module is connected to the charging control end of the boost charging module. Charging control over the high-voltage capacitor in the shock wave generator is achieved through the direct-current power source, the size and cost of a charging system are reduced, and meanwhile safety is improved.

The invention is suitable for the technical field of charging, and provides a charging method and device, charging management equipment and a computer readable storage medium, and the method comprises the steps: obtaining the temperature of a to-be-charged battery; acquiring activation energy data of the to-be-charged battery; determining a charging cut-off voltage according to the temperature and the activation energy data; and charging the to-be-charged battery, and controlling the maximum charging voltage of the to-be-charged battery to be less than or equal to the charging cut-off voltage. Through the method, the accuracy of the determined charging cut-off voltage can be improved, the cruising ability of the battery is improved, and the good experience of a user is improved.

The invention is applied to the technical field of charging, and provides a charging method, a medium and an electronic device, and the method comprises the steps: obtaining a battery voltage of the electronic device in real time, and obtaining a target charging current based on the obtained battery voltage, the target charging current, and a first voltage between a battery and the charging device when the target charging current is used for charging the battery; and determining the output voltage of the power adapter. Then, the electronic device can send a notification of adjusting the output voltage to the target charging voltage to the power adapter, so that the power adapter can adjust the output voltage to the target charging voltage, and then the charging current of the battery is adjusted to the target charging current. Thus, in the constant current stage in the fast charging mode, constant current ripples can be reduced, then the average charging current is increased, the charging electric quantity in unit time is increased, and the charging time is saved. And moreover, the time of charging current climbing and falling can be shortened, so that the charging efficiency can also be improved.

The invention discloses a self-adaptive quick charging protection method and system for mobile equipment, which are used for adaptively adjusting charging current and a charging stage so as to prolong the service life of a battery. The method comprises the following steps: acquiring electrochemical impedance spectroscopy data of the battery, wherein the electrochemical impedance spectroscopy data is used for being combined with the cycle index and the capacity attenuation factor of the battery to evaluate the aging degree of the battery; determining a charging current in a pre-charging stage according to an aging degree evaluation result of the battery; when the real-time voltage of the battery reaches a constant-current charging voltage threshold value, the charging current is adjusted according to the real-time temperature of the battery so as to be switched to a constant-current charging stage; when the real-time voltage of the battery reaches a constant-voltage charging voltage threshold value, the charging current is secondarily adjusted through current pulse optimization so as to be switched to a constant-voltage charging stage, and the constant-voltage charging voltage threshold value is larger than a constant-current charging voltage threshold value; and when the battery capacity of the battery reaches a preset full-load threshold value, adjusting the charging current to be within a trickle charging current range so as to switch to a trickle charging stage.

Disclosed is a device that decouples switching speed and gate delay time using an improved voltage-source gate driver. A shunt capacitor and a shunt resistor are connected in series to parallel across gate resistors of a voltage-source gate driver. The shunt capacitor and shunt resistor allow the gate delay and switching speed effect of the gate resistors to be decoupled. The shunt capacitor provides an initial high charge voltage and discharge gate current to reduce gate delay time. The shunt resistor modifies the effective gate resistance, which affects the gate current and the resulting switching speed. Shunt capacitor and shunt resistor values are determined to achieve the desired switching speed control with minimum gate delay time. When multiple power devices are paralleled, a common gate resistor, a shunt resistor and a capacitor combination is used. Each power device is also provided a respective split-gate resistor.

The invention discloses a charging pile output power limiting method and system based on battery dynamic parameters. The method comprises the steps that the maximum output power Pmax of a charging pile is set based on the power supply capacity Pgrid of a power grid, and a first sampling period T1 is set; acquiring a battery open-circuit voltage Uoc, an initial charging voltage U0 and a charging current I0; obtaining Rbat based on the Uoc, the U0 and the I0; based on the Pmax, the Rbat and the Uoc, the maximum allowable current Imax of the charging pile is determined; a charging request current Ireq is obtained, if Ireq is larger than Imax, I is set to be equal to Imax, and otherwise I is set to be equal to Ireq; and based on T1, collecting a charging voltage U and a charging current I, and updating Uoc and Rbat so as to limit the output power of the charging pile. The method has the advantages that the maximum allowable output current is dynamically adjusted according to the dynamic parameters of the battery, the output power is effectively prevented from exceeding the limit, and the polarization of the battery is prevented from being aggravated.

The invention relates to a semiconductor device and a method of operating the same. A memory device includes a bit line control circuit and a row decoder. The bit line control circuit applies a verify pre-charge voltage to a program prohibition bit line after a program pulse period, the program prohibition bit line holding the program prohibition voltage during the program pulse period. The row decoder forms a channel in a string coupled between a program-prohibition bit line and a source line. A program prohibition voltage of the program prohibition bit line is discharged to the verification pre-charge voltage through the channel.