2518 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.

An all-solid-state secondary battery including: a cathode including a cathode active material layer; an anode including an anode current collector, and an anode active material layer on the anode current collector, wherein the anode active material layer includes an anode active material which is alloyable with lithium or forms a compound with lithium; and a solid electrolyte layer between the cathode and the anode, wherein a ratio of an initial charge capacity (b) of the anode active material layer to an initial charge capacity (a) of the cathode active material layer satisfies a condition of Equation 1: 0.01<(b / a)<0.5, wherein a is the initial charge capacity of the cathode active material layer determined from a first open circuit voltage to a maximum charging voltage, and b is the initial charge capacity of the anode active material layer determined from a second open circuit voltage to 0.01 volts vs. Li / Li+.

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.

Systems and methods for providing DC-DC power converter topologies are described. In at least one embodiment, a DC-DC power converter comprises a primary sub-circuit coupled to a fixed or variable DC input voltage, a first secondary sub-circuit and a second secondary sub-circuit, a transformer isolating the primary sub-circuit from the first and the second secondary sub-circuits, the transformer comprising a predetermined number of turns, the first and the second secondary sub-circuits being configurable in a series mode and a parallel mode by switching configurations of a first, second and third transition switch, and the first and the second secondary sub-circuits providing an output charging voltage and an output charging current for charging an external device.

The utility model provides a bootstrap voltage charging circuit applied to a switching converter. The bootstrap voltage charging circuit comprises a bootstrap capacitor, a first switching tube, a first time delay circuit, a second time delay circuit and a logic judgment unit. The second end of the bootstrap capacitor is coupled with the switch node; the first end of the first switch tube receives a charging voltage signal, the second end of the first switch tube is coupled with the first end of the bootstrap capacitor, and the control end of the first switch tube receives a charging control signal; the first end of the bootstrap capacitor generates a bootstrap voltage signal; the first time delay circuit receives the switch control signal and outputs a first time delay signal; the second time delay circuit receives the switch control signal and outputs a second time delay signal; the logic judgment unit generates a charging control signal according to the first delay signal, the switch control signal and the second delay signal. According to the utility model, the diode is replaced by the switch tube with smaller conduction voltage drop, and by controlling the switch tube, the same effect as that of the diode can be achieved, and the problem of insufficient voltage can be avoided.

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 embodiment of the invention discloses a power supply management system and method and a mooring unmanned aerial vehicle. The power supply management system comprises an airborne power supply, a lithium battery and a current detection module. The airborne power supply is used for supplying power to the mooring unmanned aerial vehicle and charging a lithium battery mounted on the mooring unmanned aerial vehicle; the lithium battery is used for supplying power to the mooring unmanned aerial vehicle when the airborne power supply is abnormal in power supply; the current detection module is used for detecting the charging current when the airborne power supply charges the lithium battery and feeding back the charging current to the airborne power supply to adjust the output voltage of the airborne power supply. According to the technical scheme provided by the embodiment of the invention, when the airborne power supply is abnormal, the lithium battery supplies power to the mooring unmanned aerial vehicle, so that air crash of the mooring unmanned aerial vehicle due to sudden power failure is prevented. And the charging current of the lithium battery is detected through the current detection module, and the airborne power supply reduces the self output voltage to charge the lithium battery, so that the lithium battery is prevented from being damaged by overlarge charging voltage, and the lithium battery does not need to be disassembled in the charging process.

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.

A monitored DC charging method for charging a vehicle rechargeable traction battery by way of a charging voltage source external to the vehicle is provided. The rechargeable traction battery has a nominal voltage of at least 500 V. In a checking step, the method includes detecting whether the charging voltage source has a surge protector which includes a voltage limiting element that is provided between a charging voltage potential and a ground potential of the charging voltage source and is set up to transition to a conductive state from a voltage below the nominal voltage. DC voltage is transmitted from the charging voltage to the rechargeable traction battery when the charging voltage source does not have the surge protector. At least one DC charging mode for transmitting DC voltage from the charging voltage source to the rechargeable traction battery is suppressed when the charging voltage source has the surge protector.

The embodiment of the invention provides a charging method and device, electronic equipment and a storage medium, and belongs to the technical field of lithium ion batteries, and the method comprises the steps: detecting whether a charging voltage value is smaller than a first preset threshold voltage value or not; if the charging voltage value is smaller than the first preset threshold voltage value, pre-charging the to-be-charged battery based on the first preset current until the charging voltage value reaches the first preset threshold voltage value, and controlling the to-be-charged battery to enter a constant-current charging stage; charging the to-be-charged battery based on a second preset current until the capacity value of the to-be-charged battery reaches a preset capacity threshold value, and entering a multi-stage constant-voltage charging stage; according to each charging voltage determined in the preset charging voltage range, performing stage charging on the to-be-charged battery until the charging voltage value reaches a second preset threshold voltage value, and controlling the to-be-charged battery to enter a final constant voltage charging stage; and when the charging current value is reduced to the charging current threshold value, charging is stopped. Through the provided scheme, the charging efficiency is improved, and the risk of battery damage is reduced.

The invention discloses a power battery charge state estimation method, battery management equipment and a hybrid electric vehicle, and relates to the technical field of automobiles. According to the power battery state-of-charge estimation method, a charging platform area of a power battery in a target hybrid vehicle is obtained, multiple states of charge in the charging platform area are determined as charging targets based on the charging platform area, a charging test is carried out on the power battery, and a charging relation curve of the power battery for the multiple states of charge under each preset working condition is obtained; when the charge state of the power battery is estimated, the current charging voltage and the current charging capacity of the power battery are obtained, and then the current charge state is calibrated by adopting the charging relation curve of the power battery for multiple charge states under multiple preset working conditions, so that the target charge state of the power battery is obtained; therefore, the problem of inaccurate estimation in the platform area range of the OCV-SOC curve when the SOC of the power battery is estimated by using the OCV-SOC curve is avoided, and the SOC estimation accuracy of the power battery 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.

The invention provides a lithium battery self-adaptive charging method and system, and relates to the technical field of lithium battery charging, and the method comprises the steps: building a state-of-charge equation describing the change of the electric quantity of a lithium battery along with the charging current; calculating the positive electrode current density and the negative electrode current density of the lithium battery under the charging current; determining the internal charging voltage of the lithium battery under the charging current by using a BV kinetic equation in combination with the positive electrode current density and the negative electrode current density; determining an SEI layer overpotential associated with the SEI layer generation rate; calculating SEI layer generation current related to the charging current according to the SEI layer overpotential; establishing a relation function between the SEI layer generation current and the capacity loss of the lithium battery; establishing a charging current linear attenuation equation; establishing a charging current optimization equation, and solving an expected charging current; and charging the lithium battery. And while the charging efficiency is not reduced, the excessive generation of an SEI layer in the charging process is reduced, and the service life of the lithium battery is prolonged.

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.

A capacitive sensor and capacitive sensing method including driver device having first input configured to receive clock signal, second input configured to receive charging voltage, third input configured to receive common-mode voltage, and output; first capacitor configured to be sensed, having first terminal connected to output of driver device and second terminal; and receiver device having first input configured to receive clock signal, second input connected to second terminal of first capacitor, and third input configured to receive the common mode voltage, wherein the receiver includes a temperature-compensated analog-to-digital converter (ADC), wherein the temperature-compensated ADC includes a voltage reference generator, and wherein the voltage reference generator includes a comparator, a first p-channel Metal Oxide Semiconductor (MOS) transistor, a second p-channel MOS transistor, a third p-channel MOS transistor a first variable resistor, a second variable resistor, a third variable resistor, a fourth variable resistor, a first diode, and a second diode.

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.