Lithium Plating Prevention During Fast Charging in EV Batteries

A novel charging control strategy for lithium-ion batteries that optimizes charging time while preventing degradation. The control system monitors the battery's state-of-charge (SOC) and internal resistance, then dynamically adjusts charging current to maintain optimal charge rates while preventing excessive lithium plating. This approach balances charging efficiency with battery protection against degradation mechanisms like SEI growth and lithium plating.

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Charging control method for lithium-ion batteries in electric vehicles that optimizes charging rates based on battery temperature. The method enables controlled charging by dynamically adjusting charging current based on temperature, preventing temperature-related degradation and overcharging while maintaining optimal charging efficiency.

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A method and system for optimizing fast charging of lithium-ion batteries through predictive modeling. The method uses a fractional-order impedance spectrum model to predict the battery's behavior during charging and discharging, enabling precise control of temperature and charge rates. The system incorporates this predictive model into its charging and discharging protocols, allowing for optimized charging strategies that extend battery lifespan. The model incorporates temperature and charge rate parameters that adapt to the specific battery characteristics, enabling more effective charging strategies that balance cycle life with performance.

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A charging system for electric vehicles that optimizes lithium plating prevention during recharging by dynamically regulating current levels. The system employs machine learning models to predict charging current and time margins before lithium plating on the battery's anode, based on temperature, state of charge, and health status. It achieves this prediction through real-time monitoring of the anode potential and resistance, as well as thermal measurements on individual battery cells. The system automatically adjusts charging currents to prevent lithium plating while maintaining maximum charge efficiency, enabling faster recharging times without compromising battery health.

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Battery charging method and system that improves charging safety for high-speed charging of lithium-ion batteries by detecting lithium plating during charging. It involves: acquiring charging strategy, charging with current from table, lithium plating detection during charge, continuous charging if no plating, stopping detection if plating, updating current if plating, and continuing charging at new current. This mitigates plating risks while enabling high-speed charging.

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Rapid charging method for lithium-ion batteries in electric vehicles that prevents lithium plating during high-power charging. The method establishes a safety margin around the lithium plating threshold, then continuously decreases charging current while maintaining this margin. This approach ensures maximum charging efficiency while preventing lithium deposition on the anode surface. The safety margin is calculated based on the battery's state of charge and charging characteristics. The method is validated through performance testing and verification of the charging algorithm.

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Reducing lithium dendrites in lithium-ion batteries through real-time temperature control during charging. The method monitors the battery's temperature and adjusts charging parameters based on whether the temperature is below a minimum threshold or above a maximum threshold. If the temperature is below the minimum threshold, the battery continues charging; if it's above the maximum threshold, the battery is refrigerated to prevent dendrite growth. This approach enables efficient charging while preventing thermal runaway.

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Optimizing fast charging of electric vehicles in high temperatures using battery health, voltage, and temperature limits to improve charging speed while ensuring safety and battery life. It involves using temperature, battery health, and highest cell voltage during charging to limit charge rate. This prevents overcharging or damage in hot environments. The charging rate is adjusted based on these factors to balance charging time and battery health.

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A novel fast charging system for lithium-ion batteries that enables rapid charging while preventing lithium precipitation. The system employs a unique "fast heating and fast charging" approach that combines AC charging with controlled heat generation. The battery is preheated to high temperatures during charging, then maintained at these elevated temperatures during charging. This approach significantly reduces lithium precipitation during high-rate charging compared to traditional constant current charging methods. The system can achieve charging speeds of up to 400 km per hour while maintaining safety and preventing thermal runaway.

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Lithium-ion battery detection method that improves accuracy in lithium precipitation analysis. The method employs a two-stage approach where the battery is intermittently charged and then analyzed during standstill periods. The first stage determines lithium evolution based on SOC and internal resistance data collected during intermittent charging. The second stage uses voltage-time curves to determine lithium precipitation based on the first stage's lithium evolution data. This dual-stage approach provides enhanced detection capabilities compared to traditional methods by incorporating both intermittent charging and standstill analysis.

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Method for detecting lithium evolution during high-rate charging of lithium-ion batteries in electric vehicles. The method employs a circuit model parameter analysis to predict arc size changes during charging, specifically identifying trends in the arc size parameter Ret. If Ret continues to decrease, lithium evolution is detected. If Ret increases after state of charge (SOC) 80%, lithium evolution is ruled out. This approach provides an objective, battery-centric method to monitor lithium evolution during charging, enabling early detection of potential battery degradation and internal short circuits.

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Battery charging method that optimizes charging conditions for hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs) by dynamically selecting between constant current charging and pulse charging modes. The method analyzes lithium ion battery behavior during charging to determine the most effective charging strategy, enabling rapid charging while preventing lithium evolution and maintaining battery health. The charging modes are selected based on the battery's state of charge and capacity, ensuring efficient charging while minimizing the risk of premature capacity loss and battery damage.

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Real-time battery management system for lithium-ion batteries that enables safe and efficient charging through predictive modeling of electrode potentials and internal resistance. The system reconstructs the battery's state-of-charge curve from its factory balance point, calculates the maximum charging current based on the balance potential and resistance, and dynamically controls charging to prevent over-discharge. The system continuously monitors and adjusts the charging parameters in real-time to maintain optimal battery health during charging operations.

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Reducing lithium-ion battery degradation during charging by optimizing current control. The method identifies a specific relationship between battery state of charge (SOC) and internal resistance that increases during low SOC charging. It then uses this relationship to dynamically adjust charging current to prevent lithium precipitation on the negative electrode, particularly during low SOC charging.

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Charge/discharge control for lithium-ion batteries that optimizes performance while preventing lithium precipitation. The control employs a dynamic charging/discharging strategy that adjusts the allowable charging current based on both charging and discharging durations. The charging current is initially set at a maximum value where lithium deposition is prevented, but gradually increases during charging and decreases during discharging. This approach balances the need to prevent lithium precipitation with the requirement for maintaining battery performance during high-power charging conditions.

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Optimizing temperature control in electric vehicle batteries during fast charging to prevent degradation and improve lifetime. The method involves simulating battery responses at different charge rates and temperatures to find an optimal input temperature profile that minimizes lithium plating and uniformly heats/cools the battery. This profile is then applied to the temperature management system to optimize charging without uneven heating/cooling. By accurately modeling and optimizing battery temperature profiles, lithium plating can be reduced during fast charging.

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Controlling charging of lithium-ion batteries through a novel method that optimizes current delivery while preventing lithium plating. The approach analyzes the battery's internal resistance and overpotential margin to determine the optimal charging current, enabling efficient charging while minimizing lithium deposition. The method uses a dynamic parameterization approach that adapts to changing battery conditions, including aging effects and temperature variations, to maintain optimal charging parameters. This approach enables precise control over charging currents, reducing lithium plating while maintaining battery health.

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Non-destructive method for detecting lithium evolution in lithium-ion batteries through monitoring their electrochemical behavior during charging and discharging. The method utilizes the voltage curve of the battery after completion of charging to identify lithium evolution, eliminating the need for battery disassembly. This approach enables real-time detection of lithium migration and precipitation at the battery interface, providing a non-invasive means to assess battery health and prevent potential safety issues.

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High-rate fast-charging lithium-ion battery that enables efficient charging and discharging at high currents while maintaining cycle life. The battery achieves this through a novel negative electrode design featuring a multi-pole tab winding structure with a specific internal resistance profile. The design incorporates an artificial graphite active material with a thickness of 20-50um, which enhances lithium ion insertion channels and improves charging efficiency. The battery's compact positive electrode active material layer achieves optimal compaction density, preventing agglomeration while maintaining current-carrying capacity. The multi-pole tab winding architecture enables efficient heat dissipation during high-current charging and discharging, while the specific internal resistance profile minimizes voltage drop during charging. This architecture enables fast charging at rates up to 5C, with improved cycle life compared to conventional designs.

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Fast-charging lithium-ion batteries achieve efficient energy storage through a novel charging strategy that maintains anode potential while preventing lithium plating. The method employs a three-phase charging approach: initial near-maximum current charging, gradual reduction of current while maintaining anode potential near threshold, and final constant current charging at a stable cell potential. This approach enables precise control over the anode potential, preventing unwanted lithium deposition while maintaining the battery's overall health.

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