1504 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.

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.

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 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 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.

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 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 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 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.

The utility model provides an efficient charging circuit for a nickel-metal hydride battery, which belongs to the technical field of charging circuits, and comprises a DCDC charging circuit, a current sampling conversion circuit and a voltage hysteresis charging control circuit, a Celloon XL4001 step-down DCDC converter with a constant current loop is selected, and an external Schottky diode TS1 is added to play a follow current role; the charging voltage is conveniently adjusted according to the resistance values of the R7 and R10 resistors; the current sampling conversion circuit adopts a battery high-side sampling mode, so that the situation that the output voltage of the battery drops too much due to too large voltage drop of a sampling resistor during low-end sampling during battery power supply is avoided; the operational amplifier introduces a sampling differential voltage signal into a current detection pin of the XL4001; temperature adjusting design is introduced into hysteresis design, reverse change is carried out along with the temperature, then the upper limit value and the lower limit value of hysteresis charging voltage are changed, and the defect that a traditional nickel-metal hydride battery charging circuit has adverse effects on the service life of a battery is overcome.

An energy storage system includes a controller and a plurality of battery packs connected in parallel. The battery pack includes a cell pack, a temperature sensing module, a temperature control module, and a battery management system (BMS). The temperature sensing module is configured to detect a temperature of the battery pack, the temperature control module is configured to heat the battery pack, and the BMS is configured to send heating requests and states of charge (SOCs) of corresponding battery packs to the controller. The controller determines, based on a difference between a voltage of a direct-current bus and a charging voltage reference value of the energy storage system, a quantity of battery packs whose temperature control modules can be enabled, and determines, based on the SOCs of the battery packs, priorities for enabling the temperature control modules of the battery packs, enhancing utilization of power generation power.

The invention relates to a method for controlling the charging voltage of a vehicle, and the method comprises the steps: responding to a received first message related to the charging parameters of a charger, carrying out the matching of the charging parameters of the charger (1) and the vehicle (10) based on the first message, and transmitting a second message related to the charging parameters of the vehicle to the charger (2), the charging parameter of the charger comprises the highest allowable charging output voltage of the charger; and adjusting a battery voltage platform of the vehicle based on the maximum allowable charging output voltage of the charger and the detected total battery voltage, so that the detected total battery voltage at the adjusted battery voltage platform is lower than the maximum allowable charging output voltage of the charger. According to the method and the device, the charging voltage compatibility problem of the electric vehicle of a high-voltage platform at the public charging piles of different voltage levels is effectively solved, the battery voltage platform of the vehicle is dynamically adjusted based on the detected total battery voltage in the charging process, and charging interruption caused by rising of the total battery voltage is avoided.

The invention relates to the technical field of lithium battery management, and discloses an intelligent charging optimization control method for a lithium battery pack, and the method comprises the steps: S1, monitoring the multi-dimensional parameters of the lithium battery pack in real time, including the single voltage, the battery temperature, the environment temperature and the current charging current; s2, calculating the health state and the current charging efficiency of the battery pack based on the monitoring parameters; s3, dynamically generating an optimal charging curve according to the state of the battery pack, wherein the optimal charging curve comprises an adjustment strategy of charging current and charging voltage; s4, implementing multi-stage adaptive charging control, including a pre-charging stage, a constant-current charging stage and a constant-voltage charging stage; and S5, evaluating the safety state of the battery in real time in the charging process, wherein the safety state comprises thermal runaway risk and overcharge risk early warning. By monitoring the multi-dimensional parameters of the lithium battery pack in real time, comprehensive sensing of the battery state is realized, the problem of single monitoring parameter of a traditional method is solved, and a data basis is provided for intelligent charging control.

The invention provides an energy storage power station lithium battery thermal runaway early warning method, device and equipment, and is applied to the technical field of energy storage power station lithium battery safety. The thermal runaway early warning method for the lithium battery of the energy storage power station comprises the following steps: acquiring a charging current and a charging voltage of a target lithium battery at each moment in a constant-current charging process; processing the plurality of charging currents and the plurality of charging voltages at the plurality of moments of the target time period in response to determining that the charging voltages at the adjacent moments in the target time period are continuously reduced, and generating energy change information of the target lithium battery in the target time period; in response to the fact that the energy change information is larger than a target threshold value, thermal runaway early warning information for the target lithium battery is sent to the terminal; wherein the target threshold value is dynamically configured according to the voltage change information after standing and the predetermined charging current when the target lithium battery is charged to the predetermined charge load at the predetermined constant current in the normal operation state.

The invention belongs to the technical field of display driving, and particularly relates to a gate driving unit, a gate driving circuit, a compensation method and a display panel, and the gate driving unit comprises a detection module which is used for detecting actual electrical parameters on a driving control node in a detection stage, the external control device outputs a compensation signal according to a comparison result of the actual electrical parameter and a preset reference range; or / and a compensation module which is configured to be connected with the external control device, the output end of the pre-charging module and the driving control node, and is used for responding to a compensation signal output by the external control device, compensating the pre-charging voltage output by the pre-charging module and then outputting the pre-charging voltage to the driving control node; through real-time comprehensive detection and dynamic cooperative compensation, the influence of threshold voltage drift of the pre-charge transistor and the output transistor on the driving control node is actively counteracted, and the output stability of the gate driving unit is improved.

The invention relates to the field of switching power supply management integrated circuits, in particular to a self-adaptive conduction time generating circuit for a BUCK type DC-DC converter, which comprises a charging circuit (1) and a sampling circuit (2), and is characterized in that the charging circuit (1) generates charging current in direct proportion to input voltage through a charging capacitor (C1) and a comparator (OP2), and charges the C1 to obtain first charging voltage; the sampling circuit (2) samples and filters the voltage of the switch node (SW), and outputs a first sampling voltage in direct proportion to the output voltage; and the comparator (OP2) compares the first charging voltage with the first sampling voltage, and outputs a turn-off signal to control the upper power tube to be turned off when the first charging voltage and the first sampling voltage are equal, so that the self-adaptive turn-on time is obtained. By dynamically adjusting the conduction time, the electromagnetic interference in the traditional constant conduction time control is effectively suppressed, the noise immunity and reliability of the system are improved, and meanwhile, the method has the advantages of quick response and high efficiency.

Disclosed are a flyback switching power supply and a self-powered circuit and method therefor. The self-powered circuit includes: a charging capacitor configured to draw power from a primary coil and supply power to a switching power supply chip; a withstand voltage switch tube for acquiring a power supply voltage of the primary coil and outputting a charging voltage; a charging switch tube for controlling whether to charge the charging capacitor; an adjustment control tube for limiting the charging voltage of the charging capacitor; a voltage limiting control unit for controlling the conduction state of the adjustment control tube according to the charging voltage; a charging control unit preset with a charging requirement; and an inverter for acquiring the conduction switch signal and controlling the voltage limiting control unit or the charging control unit to be connected to the adjustment control tube according to the conduction switch signal.

The invention belongs to the technical field of intelligent power grids, and particularly relates to an emergency power supply method and system for a cable branch box, and the method comprises the steps: obtaining a breaking instruction result of a circuit breaker, enabling a main power supply loop to continue to supply power if the breaking instruction result is keeping, and enabling an incoming circuit breaker to execute a breaking operation and switch an emergency power supply loop if the breaking instruction result is triggering; when the emergency power supply loop supplies power, the emergency power supply voltage is dynamically adjusted based on the environment self-adaptive charging function, and the corrected charging voltage is obtained; under the condition that the breaking instruction result is keeping, a power supply switching instruction is obtained, and if the power supply switching instruction is switching, an emergency power supply loop is switched; monitoring the power supply state, determining the current of each branch of the main power supply loop or the emergency power supply loop, predicting the fault probability of power supply equipment, and determining a communication protocol based on the communication state; and under the power supply state of the emergency power supply loop, determining the load power supply priority. The performance and the reliability of the cable branch box emergency power supply system are remarkably improved.

A lithium secondary battery includes a positive electrode including a positive electrode active material layer and a negative electrode including a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material, and the negative electrode active material consists of silicon. In a graph of capacity-voltage measured by manufacturing a half-cell including the positive electrode and a lithium metal electrode and then discharging the half-cell at a constant current of 0.1 C, an inflection point appears in a region in which a voltage is 3.3 V to 3.7 V. The capacity of the positive electrode at the inflection point is from 3% to 25% of the capacity of the positive electrode at a final charge voltage.