74 results about "Pulse charge" patented technology

The invention discloses a battery formation method, a battery and an electric device, and belongs to the technical field of batteries. According to the method, a battery is soaked and pre-charged in sequence, then pulse charging is performed on the battery during charging, and ultrasonic treatment and continuous air exhaust are performed on the battery while pulse charging is performed. And after charging is finished, carrying out shelving treatment and aging treatment to finish formation. Charging is carried out under the multi-physical field synergistic effect of an ultrasonic wave field formed by ultrasound, a pulse electromagnetic field formed by pulse charging and a negative pressure field formed by air exhaust, the quality of an SEI film can be improved, polarization is reduced, and the cycle performance of the battery is improved.

The present application relates to a lithium-plating-risk determination method and apparatus for vehicle-side battery cells, and a device, a storage medium and a product. The method comprises: firstly determining the current pulse charge / discharge operating condition on the basis of a pulse charge / discharge request; then, acquiring an SOC dataset and a voltage dataset of a vehicle-side battery cell under the current pulse charge / discharge operating condition; if SOC data within a lithium-plating-risk SOC interval is present in the SOC dataset, further acquiring voltage data corresponding to the SOC data; and if the voltage data exceeds a critical lithium-plating-risk voltage, determining that the vehicle-side battery cell has a high lithium plating risk.

The invention discloses a retired battery parameter identification method, and relates to the technical field of lithium ion battery management, and the method comprises the steps: carrying out the pulse charging and discharging test of a retired lithium ion battery, obtaining a relaxation voltage sequence, carrying out the smoothing preprocessing of the relaxation voltage sequence, constructing a candidate cut-off termination time set in a relaxation time interval, and carrying out the calculation of the candidate cut-off termination time set. And intercepting corresponding relaxation data for each truncation termination time, performing parameter fitting based on the second-order equivalent circuit model, calculating a root-mean-square error at each truncation termination time, and selecting a parameter group with the minimum error as a target equivalent circuit parameter. By selecting and modeling a data fitting interval as a root-mean-square error minimization problem, automatic adaptive identification of the equivalent circuit parameters of the decommissioned battery is realized, the difficulty of selecting an E point under a fixed window is solved, the robustness and physical consistency of a parameter identification result are improved, a model prediction error is remarkably reduced, and the generalization ability under multiple working conditions is improved.

The invention relates to the technical field of battery detection, in particular to an open-circuit voltage fitting method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining test data obtained through the pulse charging and discharging test of a battery; according to the test data, a first model parameter in a target fitting model is assigned, in the target fitting model, a battery end voltage is equal to the superposition of an ohm voltage drop, a charge transfer polarization voltage drop, a diffusion polarization voltage drop and an open-circuit voltage, and a second model parameter in the target fitting model is assigned; the first model parameters comprise ohmic impedance in the ohmic voltage drop, reaction impedance in the charge transfer polarization voltage drop and diffusion impedance in the diffusion polarization voltage drop; and on the basis of the target fitting model, open-circuit voltages of the battery in different charge states are obtained, and the different charge states correspond to different battery terminal voltages. Therefore, the estimation speed of the open-circuit voltage and the prediction accuracy of the open-circuit voltage are improved by adopting a pulse charging and discharging test and model fitting mode.

This invention discloses an adaptive charging method for nickel-metal hydride batteries based on pulse modulation. By simultaneously sampling the temperature at multiple characteristic locations on the battery surface and calculating the average temperature, thermal field standard deviation, and maximum battery temperature, a comprehensive quantitative perception of the overall and local thermal state of the battery is achieved, overcoming the limitations of single-point temperature measurement and accurately identifying local thermal risks. By comparing the thermal field standard deviation with a thermal field imbalance threshold and switching the charging control mode based on the comparison result, combined with a differentiated duty cycle adjustment strategy matched to the charging control mode, adaptive control of charging parameters is achieved, balancing charging efficiency when the thermal field is uniform and suppressing local hot spots when the thermal field is unbalanced. By simultaneously monitoring the real-time battery voltage, maximum battery temperature, and cumulative charging time, and immediately stopping pulse charging when a set threshold is reached, a triple safety protection mechanism is constructed, mitigating overcharging and overheating risks from multiple dimensions and significantly improving the safety and reliability of the charging process.

The utility model relates to the technical field of medical equipment, and particularly discloses a bipolar nanosecond pulse synchronous output circuit and ablation equipment, which comprise a positive pulse output circuit and a negative pulse output circuit, the positive pulse output circuit comprises a positive pulse charging unit, a positive pulse output control unit, a positive pulse transmission unit and a positive pulse output electrode wire which are electrically connected in sequence; the negative pulse output circuit comprises a negative pulse charging unit, a negative pulse output control unit, a negative pulse transmission unit and a negative pulse output electrode wire which are electrically connected in sequence; the positive pulse transmission unit at least comprises a forward multiplication transmission unit which is used for performing forward voltage multiplication or forward current multiplication on the forward output pulse signal; the negative pulse transmission unit at least comprises a negative multiplication transmission unit which is used for carrying out negative voltage multiplication or negative current multiplication on the negative output pulse signal. The bipolar nanosecond pulse synchronous output circuit provided by the utility model can improve instant pulse energy of nanosecond pulse tumor ablation equipment.

The disclosure relates to a battery system. The battery system comprises a first battery cell unit and a second battery cell unit, each one comprising a respective current regulator arrangement configured to control charging of a respective battery cell unit. The battery system further comprises a control arrangement. The control arrangement is configured to selectively control charging of the first and second battery cell units, by controlling the current regulator arrangement of the first battery cell unit to charge the first battery cell unit, and simultaneously by controlling the current regulator arrangement of the second battery cell unit to heat said second battery cell unit. The heating is performed by a pulsed charging cycle, preferably wherein the pulsed charging cycle is delivered by pulses having a frequency of 1 Hz – 1 MHz, preferably 10 Hz – 100 kHz. The disclosure further relates to a computer program and a computer-readable medium.

The application discloses a kind of construction methods of power battery system power simulation model, belong to power battery simulation technical field, this method includes: selecting the three kinds of sample monomer battery with lowest, highest and mean value internal resistance;Equivalent circuit model corresponding to unit is constructed based on the characteristic parameters of sample monomer battery;Unit equivalent circuit model is expanded to the battery module equivalent circuit model for characterizing corresponding battery group, and battery module equivalent circuit model is connected in series to form system level equivalent circuit model;The basic parameters, quality and thermal management scheme of monomer battery are combined to construct the thermal management model corresponding to each battery module;System level equivalent circuit model, each thermal management model and pulse charge-discharge condition model are thermoelectric coupling, and power simulation model is obtained.The application is equivalent to modeling by representative sample, and the influence of battery consistency difference on system power is truly reflected, and the problem of large amount of calculation and insufficient precision of traditional modeling is solved.

The invention relates to a rapid charge supply device for spacecraft pulse charge emission, and belongs to the field of space charging and discharging. The bottom plate is of a plate-shaped structure which is horizontally arranged in the axial direction; the cathode is of a cylindrical structure; the cathodes are in coaxial butt joint; the anode is of a cylinder structure; the anode is coaxially arranged in the inner cavity of the cathode; the root of the anode is butted with the bottom plate; the working medium sleeves the outer wall of the middle part of the anode and is filled between the cathode and the anode; the spring is sleeved on the outer wall of the anode root; one end of the spring is contacted with the bottom plate; one end of the spring contacts with the working medium end face; the insulating assembly is arranged at the opening of the axial head end of the cathode; two poles of the energy compression module are respectively connected with the cathode and the anode; the power supply is connected with the energy compression module to charge the energy compression module; a charge self-consistent cavity is formed on the outer side of the opening of the axial head end of the cathode; when the device is used for spacecraft pulse charge beam output, rapid supply in the pulse is achieved, and the spacecraft is kept electrically neutral in real time.

The invention discloses a triggering system for triggering a gas switch based on a linear photoconductive switch, and aims to solve the problems of instability, short service life, low compactness and the like of an existing triggering system. The device is composed of a high-voltage direct-current source, a charging resistor, a charging isolation inductor, a thyristor, a pulse charging source, a gas switch, a photoconductive switch, a current-limiting resistor, a reverse inductor, a control loop and a load. The pulse charging source comprises an energy storage capacitor, a thyristor, a pulse transformer and a pulse forming line. The control loop is composed of a digital delay generator and a trigger light path. The trigger light path is composed of a laser, a beam expander, an iris diaphragm, a beam splitter and an attenuation piece according to the light path of the pulse laser. The positive electrode end of the photoconductive switch is connected with the high-voltage electrode of the gas switch, bias voltage is directly obtained through coupling of the high-voltage electrode of the gas switch in a capacitive voltage dividing mode, a high-voltage bias power source is omitted, compactness and stability are good, the service life is prolonged, and reliability is improved.

The invention discloses a charging pile power grid harmonic collaborative suppression method based on an aged battery, and the method comprises the steps: switching a constant current-constant voltage mode into a multi-band pulse charging mode after the aging state of the battery is detected, constructing a pulse charging parameter dynamic adjustment mechanism, and carrying out the reactive compensation control at a constant voltage stage, spectral analysis and sensitive frequency band shielding processing are carried out on the harmonic content of the charging current, so that the purposes of reducing harmonic interference, slowing down peak load impact of a power grid and maintaining a relatively high power factor under the condition of battery performance degradation are achieved; therefore, the technical effects of improving the power quality of a power grid, enhancing the safe charging capacity of the aged battery and prolonging the service life of the battery are achieved, and the technical problems that when the health degree of the battery is reduced, power grid harmonic pollution, power factor degradation, serious system voltage fluctuation and the like are easily generated in the charging process are solved.

The present application relates to the technical field of aluminum electrolytic capacitor, in particular to a pulse aging method and a pulse aging system for high-voltage aluminum electrolytic capacitor; the pulse aging is a multiple pulse boosting-discharging cycle process; the cycle process of one pulse boosting-discharging is: first, pulse boosting and charging at the same time with a charging voltage and a charging current, maintaining high-voltage charging state after charging; then, pulse discharging and boosting at the same time with a discharging voltage and a discharging current, maintaining low-voltage discharging state after discharging; by setting pulse charging-discharging voltage, current density, cycle number and other parameters, the rejection rate of latent defect capacitor can be significantly improved, and the leakage current of the capacitor can be additionally reduced by at least 25%; the present application provides a quantifiable process scheme for efficient and high-reliability aging screening of high-voltage aluminum electrolytic capacitor.

The present application relates to a kind of formation method of negative electrode-free lithium metal battery, belong to the method or device technical field for directly converting chemical energy into electrical energy.The formation method of negative electrode-free lithium metal battery of the present application includes the following steps: S1, the cell is placed at temperature T0 Rest, rest time is t0;S2, without applying pressure to the cell, at temperature T0 With current density I0 To the cell is pulsed charged for total duration t1;S3, the temperature of the cell is restored to room temperature;S4, at pressure P1, temperature T1 To the cell is charged and discharged cycle;S5, at pressure P2, 25 ℃ To the cell is charged and discharged cycle;Wherein, -15 ℃≤T0<25 ℃, I0≤2.2C, P1≤2.2N / m, P2≤P1, T1≥30 ℃.The formation method can improve the cycle performance of negative electrode-free lithium metal battery.

An image sensor is disclosed. The image sensor may include a plurality of sensing nodes electrically connected to at least one circuit of the circuits, the sensing nodes formed on the first side of a silicon layer adjacent to the circuits. Each sensing node may include a floating diffusion structure connected to one of at least one channel of the circuits and an output circuit. Each sensing node may include a charge reset structure configured to remove a charge from the floating diffusion structure. Each sensing node may include a noise-cancellation gate electrode adjacent to the floating diffusion structure and configured to be driven by a noise-cancellation signal. The image sensor may include a resistive gate electrode configured for at least one of direct current or non-pulsed signals. A charge reset structure of each sensing node may be driven with a voltage following a sinusoidal waveform.

The present application relates to the field of two-wheel electric vehicle charging, and particularly relates to a dynamic power regulation method and system for two-wheel electric vehicle super-charging piles. The method comprises: obtaining the maximum available power of a power distribution network and collecting vehicle battery and service state data, calculating the charging urgency weight and distributing high-frequency pulse charging parameters, phase-shifting and staggering the pulse on and off time to limit the actual total power with the maximum available power as a constraint, and calculating the battery polarization degree in combination with the open circuit voltage during the zero current period of pulse off, dynamically correcting the pulse parameters based on the polarization degree and cyclically executing the scheduling. The present application improves the traditional logic of single power distribution, fuses service and battery data to ensure that emergency distribution has priority to obtain charging resources, avoids concurrent super-charging tripping risk by staggered scheduling, and effectively suppresses concentration polarization and protects the safety of underlying batteries through polarization closed-loop monitoring.

The application discloses a kind of anti-static dust removal mechanisms for liquid crystal display screen production, belong to display panel manufacturing field.The mechanism is sequentially arranged pre-charging suspension zone, standing wave excitation stripping zone and zero potential negative pressure recovery zone along the direction of conveyance.Pre-charging suspension zone utilizes detection probe to identify electrostatic polarity, and makes microdust into electrostatic suspension state by same polarity charging component emitting transient high-voltage pulse charge, and is equipped with the flexible edge grounding component of synchronous linkage to provide charge discharge loop;Standing wave excitation stripping zone utilizes high-frequency alternating air valve drive to set micro-gap air knife of face-to-face, forms spatial oscillation pressure field with preset phase difference above panel, and directly acts on suspended microdust by generated vertical acoustic streaming excitation force and strips it;Finally, by negative pressure recovery zone, microdust is recycled and potential is zeroed.The application is coupled by electrostatic body force repulsion and aerodynamic vertical excitation force in time sequence rigidity, significantly improves the removal rate of submicron microdust, effectively prevents TFT array from being punctured.

Embodiments that provide advanced charging of energy source arrangements for energy storage applications are disclosed. The embodiments can include the application of pulses to an energy source for charging and preheating purposes. Systems and techniques for assessing parameters of impedance, inductance, and thermal characteristics for use in heating and charging are described, as are feedback based pulse control embodiments that assess voltage changes due to concentration shifts.

The application discloses a warehouse-in-adaptive pulse charging control method and system applied to a shared power bank, and the method generates and acquires first trigger data corresponding to the shared power bank, creates and generates first data corresponding to the shared power bank based on the first trigger data, constructs and generates second data corresponding to the shared power bank based on the first data, establishes and generates third data corresponding to the second data according to the second data, dynamically adjusts pulse charging parameter data according to the third data, and generates fourth data corresponding to the shared power bank in real time, wherein the fourth data is charging completion prompt data, the method can realize personalized and refined charging management of power banks in different health states, thereby prolonging the overall service life of the battery, improving the safety and efficiency of the charging process, and having online battery health diagnosis capability.

The application discloses a power battery charging device and a pulse charging method. The power battery charging device is used for multiplexing the circuit structure of an existing motor controller in a vehicle. The power battery charging device comprises four main connection ports. Two of the four main connection ports are used for connecting the positive and negative poles of a charging pile, and the other two of the four main connection ports are used for connecting the positive and negative poles of a power battery. The power circuit in the motor controller is used for converting the electric energy output by the direct-current charging pile into pulse current. Therefore, the hardware investment cost is reduced, the power battery is subjected to efficient pulse charging, and the service life of the power battery is effectively prolonged.

The invention relates to the technical field of breakdown voltage testing, in particular to an inflatable lightning impulse high-voltage generator which comprises a tank body, a high-voltage generator installed in the tank body through an insulating support and a balancing device used for ventilation and pressure balancing, and the high-voltage generator is used for charging and discharging in an external pulse mode; the balancing device comprises a balancing air bag and a constant-pressure container, the balancing air bag is communicated with the interior of the tank body and is in a contraction state, the constant-pressure container is arranged in the tank body, the balancing air bag is located in the constant-pressure container, and the constant-pressure container is communicated with a plurality of pressurizing assemblies which face the constant-pressure container and pressurize the constant-pressure container through volume elastic expansion and contraction; the volume expansion pressure of the balance air bag is larger than the preset pressure of the tank body and smaller than the peak pressure of the tank body after discharging. According to the invention, the pressure is maintained through the carbon expansion of the balance air bag within a certain pressure range, and the SF6 or SF6 / N2 mixed gas in the gaps of the small balls is replaced, so that the insulation performance of the SF6 or SF6 / N2 mixed gas after discharging is optimized, and the influence of the fluctuation of the test voltage on the test result is reduced.

The present application relates to the technical field of battery power, in particular to a kind of unmanned aerial vehicle countermeasure gun battery power display method and system based on coulomb meter, including the battery pulse current is collected by electromagnetic shielding type coulomb meter, based on pulse rising edge triggers dynamic variable sampling rate mechanism, generates pulse charge quantity;The pulse charge quantity is input into eddy current-temperature joint compensation module, in combination with gun body surface magnetic field intensity data and battery temperature data, output correction charge quantity;The correction charge quantity is input into nonlinear capacity mapping model, calculate effective charge total amount, according to battery aging coefficient is converted into final residual power and drives display unit.The present application introduces the dynamic variable sampling mechanism triggered by pulse rising edge, significantly improves the collection accuracy and timing response capability of high-speed pulse current, solves the problem of large integral error of traditional fixed-frequency sampling in strong dynamic scene, cooperates with edge compensation algorithm, can effectively restore the charge omission caused by trigger delay.

The application discloses a forward converter soft switching control circuit and belongs to the technical field of analog integrated circuits, and aims to solve the problems of poor self-adaptation, low precision and difficulty in compensating system delay of an existing dead zone control scheme; the circuit comprises a zero-voltage switching detection circuit, a charge pump phase detector and a voltage-controlled dead zone time circuit, and the three components form a closed-loop negative feedback loop; the zero-voltage switching detection circuit monitors the drain voltage of a main switch tube and generates a ZVS pulse when the voltage is zero; the charge pump phase detector compares the phase difference between the ZVS pulse and the rising edge of a main switch tube driving signal and outputs an error voltage; and the voltage-controlled dead zone time circuit linearly adjusts the dead zone time according to the error voltage, so that the rising edge of the driving signal is aligned with the zero point of the drain voltage. The circuit can automatically compensate the driving delay, adaptively track the working condition change, realize soft switching, reduce the loss, optimize EMI and balance the high frequency and high efficiency of the converter.

This application discloses a charging control method and system for a battery charger, relating to the field of charging control technology. The method includes: identifying high-frequency, low-amplitude oscillation characteristic data if the grid stability index data is less than a preset harmonic distortion rate threshold; when the high-frequency, low-amplitude oscillation characteristic data is identified, starting a timer and generating first sleep timer data; continuously monitoring frequency domain waveform data to identify waveform stability window data before the first sleep timer data reaches a preset duration threshold; generating a pulse charging control command based on the waveform stability window data; acquiring continuous state data of the high-frequency, low-amplitude oscillation characteristic data when the first sleep timer data reaches the preset duration threshold; and generating a deep sleep control command and alarm data if the continuous state data indicates that the high-frequency, low-amplitude oscillation characteristic data has not disappeared. This application improves charging control efficiency.

The invention belongs to the technical field of batteries. The invention particularly relates to a secondary battery capacity rapid recovery method. The method comprises the following steps: performing low-rate discharge on a circulated secondary battery to lower limit cutoff voltage, and standing at normal temperature to obtain a discharged battery; and reversely connecting the positive electrode and the negative electrode of the discharged battery, charging by adopting reverse pulse, and standing at normal temperature after charging to obtain the capacity recovery battery. According to the charging mode, battery capacity recovery can be realized in a short time, active ions which cannot be normally de-embedded in the negative electrode can be effectively returned to the positive electrode through forced pulse charging at the negative electrode, the overall capacity and energy density of the battery are improved, equipment does not need to be purchased again, the process is simple, and large-scale application is expected to be realized.

This application relates to the field of lithium battery testing technology, and discloses a method, apparatus, electronic device, and storage medium for detecting the internal resistance of lithium batteries. The method for detecting the internal resistance of lithium batteries includes: performing pulse charge-discharge tests on the battery under test to obtain voltage response data of the battery under test under different states of charge; substituting the voltage response data into a pre-established equivalent circuit model of the lithium battery, and obtaining the internal resistance parameters in the equivalent circuit model of the lithium battery through parameter identification processing; and establishing a predictive model of the internal resistance with respect to the state of charge based on the internal resistance parameters obtained under different states of charge. This application uses software to process test data to replace the direct measurement of signals by physical hardware, thereby greatly simplifying the complexity of system wiring, integration, and maintenance at the system architecture level.

The invention provides a charging method of a negative-electrode-free sodium metal battery, which is characterized in that pulse charging is carried out for several times until the voltage of the negative-electrode-free sodium metal battery reaches cut-off voltage, and the charging process is completed. By utilizing the charging method, dead sodium resurgence can be realized, dead sodium accumulation can be reduced, and the rate capability, coulombic efficiency, capacity retention ratio, cycle stability, cycle life and the like of the negative-electrode-free sodium metal battery can be improved.

A charged particle beam device for observing a sample by periodically irradiating the sample with a pulsed charged particle beam includes a control device configured to control irradiation using the pulsed charged particle beam and detection of a signal of an emitted electron based on an observation condition. The control device calculates an irradiation period, a scanning speed, and a pulse width of the pulsed charged particle beam and a detection timing of the signal of the emitted electron based on a current of the charged particle beam emitted from the particle source and an electrostatic capacity and an electrical resistance of the sample, and sets the observation condition including the current of the charged particle beam, the irradiation period, the scanning speed, and the pulse width of the pulsed charged particle beam, and the detection timing of the signal of the emitted electron.

The application provides a lithium ion battery pulse charging optimization method and system based on LSTM, and belongs to the technical field of battery management systems. The method comprises the following steps: obtaining time sequence slice caching of a battery multi-dimensional physical state and a global health feature; dynamically generating a pulse instruction set to be evaluated, using a broadcast mechanism to perform feature dimension alignment and splicing, inputting a pre-trained model to perform parallel prediction of an end voltage; combining a physical extreme value and a model prediction error to calculate a dynamic confidence penalty term, performing adaptive funnel screening to generate a safe candidate set; based on the set, issuing an optimal instruction, or triggering a multi-level abnormal exit state machine containing a hot start detection when the set is empty; obtaining actual execution feedback, filtering through a sample cleaning gateway, and fine-tuning a full connection layer under feature layer freezing. The application takes into account the extremely fast charging efficiency and absolute safety of lithium precipitation prevention, effectively solves the high-frequency time sequence fault and long-term aging misalignment problem of edge models under resource constraints, and significantly improves the control robustness.

The invention discloses a lithium battery health degree and risk level detection method and device, a medium and a product, and the method comprises the steps: sequentially and simultaneously charging a plurality of cells based on obtained pulse charging current sources of a plurality of frequency points, and recording the voltage and current data, obtained through synchronous measurement, of each cell when each frequency point is charged; according to the recorded voltage and current data of each battery cell at each frequency point, calculating the alternating current impedance of each battery cell at each frequency point, and forming an impedance spectral line of each battery cell by adopting a regression method according to the alternating current impedance of each battery cell at a plurality of frequency points; and performing comparison according to the impedance spectral line of each battery cell in combination with a pre-stored standard spectral line to obtain the health degree and the risk level of each battery cell. According to the invention, through multi-frequency-point measurement and impedance spectral line drawing, detection of the health degree and the risk level of each cell is realized.

The invention discloses a lithium ion battery health state estimation method based on physical information Transform. The method comprises the following steps: acquiring voltage and current time sequence data of a lithium ion battery under a pulse charging condition; feature parameters are extracted from the time series data, and a training data set containing the feature parameters and corresponding health state labels is constructed; and constructing a physical information neural network model based on a Transform architecture, inputting the training data set into the physical information neural network model for training, processing pulse charging data of the lithium ion battery to be tested by using the trained physical information neural network model, and outputting a battery health state estimation result. According to the method, a framework which is high in principle and can be popularized is established, and an important contribution is made for constructing a battery health prediction model which is higher in interpretability, better in data efficiency and higher in physical credibility.