Fast Charging Techniques for LFP Batteries in EVs

A charging method and device for lithium metal batteries that combines high-rate charging with long cycle life. The method employs a novel charging strategy that adjusts the charging rate and time based on the battery's state of charge, with a correction factor α that increases with each cycle correction. The charging time input module allows users to select from predefined charging profiles, while the charging module implements the optimized charging sequence. The verification process involves multiple cycle tests to validate the charging method's performance, ensuring that the selected charging profile meets the specified cycle life criteria.

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Battery management system and electric device that optimizes charging performance by employing a unique second charging stage. The system employs a constant current charging phase until the battery reaches a first cut-off voltage, followed by a constant voltage charging phase. A second charging phase is then initiated at a voltage greater than the first cut-off voltage, enabling the battery to fully charge and discharge while maintaining optimal performance. This approach addresses the challenges of LiMPO4 positive electrode active materials during constant voltage charging.

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A method for forming lithium iron phosphate (LFP) batteries that achieves a stable peak voltage across multiple charge cycles. The method involves a series of charge cycles where the battery reaches a peak voltage at each cycle, followed by a final charge cycle where the peak voltage is maintained. This approach enables the battery to achieve a consistent peak voltage across its entire operating range, rather than the typical peak voltage only achieved during the initial charge cycles.

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A charging method for lithium-ion batteries that optimizes the charging process by dynamically adjusting the charging voltage profile. The method employs multiple constant current charging stages with progressively higher current densities, where the voltage is gradually increased from a predetermined upper limit to a predetermined lower limit. This approach enables the battery to transition from the iron to manganese phase transition during the constant current charging phase, while maintaining the necessary voltage range for the phase transition. The charging process is then completed with a constant voltage charge to the battery's cut-off current.

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A charging method for lithium-ion batteries of the lithium iron phosphate system that optimizes charging efficiency. The method employs a dual-charging approach where the battery is first charged at a constant voltage (V2) until the manganese ion phase transition occurs, followed by a second constant current charge to a higher voltage (V3). This sequential charging strategy ensures that the transition from iron to manganese phases occurs at the optimal voltage range, reducing polarization buildup and enabling faster charge completion compared to conventional constant current charging.

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Charging method for lithium-ion batteries using lithium iron phosphate blended with ternary hybrid system materials. The charging method combines the benefits of lithium iron phosphate cathode materials and ternary hybrid materials, enabling higher energy density and improved safety performance compared to pure lithium iron phosphate cathodes. The charging method achieves optimal performance through the use of lithium iron phosphate cathodes with ternary hybrid materials, specifically designed to balance energy density, cycle life, and safety characteristics.

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Battery charging method that continuously maintains optimal charging current regardless of ambient temperature, enabling precise power management across different charging conditions. The method employs a dynamic charging strategy that adapts to temperature variations, automatically adjusting charging rates between low, medium, and high power levels. This enables consistent charging performance across temperature ranges, while maintaining battery health and preventing overheating.

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A lithium-ion battery management system with wireless communication that enables real-time monitoring and automatic charging of lithium-ion batteries. The system integrates a power supply unit with a battery pack containing multiple battery cells, a management module that continuously monitors battery state and detects charging thresholds, and a control module that regulates device power supply. The system incorporates safety features like overcharge protection, overcurrent protection, and short-circuit protection, as well as balance and temperature management. The system communicates wirelessly to the user through a supported communication protocol, providing real-time monitoring and automatic charging when the battery level falls below a predetermined threshold.

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Lithium-iron phosphate battery pack with integrated monitoring and charging capabilities. The pack features a battery module containing multiple battery cells, a battery case housing the modules, a sensor unit measuring current, voltage, charge level, and temperature, and a communication module transmitting measurement data. The pack includes a charger that controls the charging process, utilizing a power supply unit to adjust charging current. The charger integrates with the pack's sensor unit to monitor battery state and transmit real-time data to a user's mobile device or PC.

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Predicting the lifespan of lithium iron phosphate (LiFePO4) batteries through a comprehensive analysis of their internal state. The method integrates LiFePO4 battery performance metrics, including capacity and internal resistance, to derive a predictive model for battery life. This approach enables accurate estimation of battery capacity and internal resistance degradation over time, thereby enabling proactive maintenance and replacement planning.

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A charging method for energy storage power supplies that optimizes charging efficiency and safety through voltage-based charging strategies. The method analyzes the battery's voltage distribution across cells and selects the most appropriate charging method based on the minimum voltage value across all cells. This approach enables faster charging, reduced heat generation, and improved battery lifespan compared to traditional single-charging methods. The method uses voltage monitoring to determine the optimal charging sequence, ensuring consistent charging conditions across the battery pack.

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Improving lithium-ion battery cycle life through optimized charging rates. The method involves determining the maximum charging current rate (C0) for a lithium-ion battery, then controlling the charging process to achieve this rate. The charging process includes charging at the maximum rate to the maximum cut-off voltage (Umax), then discharging to a predetermined cut-off voltage (U). The battery capacity is separated from the charge state, and subsequent charging is performed at the determined rate (C0) until the cut-off voltage is reached. This approach enables controlled charging to prevent over-discharge while maintaining the battery's optimal state of charge (SOC).

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Charging battery management system that optimizes charging efficiency through dynamic voltage regulation. The system monitors battery voltage during charging and transitions between constant current and constant voltage charging modes based on real-time voltage levels. During constant current charging, the system maintains a constant current rate while monitoring voltage. When voltage reaches a predetermined threshold, it switches to constant voltage charging. This approach ensures optimal charge completion while preventing overcharging and maintaining the battery's internal state.

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A charging method that optimizes battery charging by controlling voltage levels during the charging process. The method involves charging the battery at a constant current to a first voltage, then charging it at a constant voltage to a predetermined current level (k). The battery is then charged at a constant voltage to a second current level (I), and finally, it is charged at a constant voltage to a predetermined current level (I'). The charging voltage is limited to prevent excessive voltage drops during the charging process. This approach ensures consistent charging while maintaining the battery's internal chemistry and preventing excessive degradation.

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Calibration method for charging management modules in electronic devices to improve charging accuracy and prevent battery-related issues. The method involves analyzing the charging module's bias characteristics to determine the optimal charging voltage range for the battery type. This enables precise charging control that maintains the battery's rated voltage during charging and prevents both overcharging and undercharging.

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Constant voltage charging system for electric vehicle batteries that enables precise control over charging conditions. The system comprises a current-limiting module connected to the charging circuit, a voltage detection module connected to the current-limiting module, and a switching module that controls the connection between the detection module and the battery pack. The detection module monitors the state of each battery cell in the pack, while the switching module dynamically selects between the current-limiting and voltage-limiting charging modes based on the cell voltage. This enables the system to maintain optimal charging conditions for the entire battery pack while preventing overcharging.

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A low-temperature charging method for lithium iron phosphate batteries that maintains their original structure while charging at low temperatures. The method employs a unique charging sequence that gradually increases the charge rate from the initial state, allowing the battery to reach full charge capacity while maintaining its original performance characteristics. This approach enables safe and efficient charging of lithium iron phosphate batteries in low-temperature environments without compromising their capacity or safety.

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Battery charging method that enables faster charging while maintaining safety through a novel approach. The method employs a dynamic voltage and current strategy that switches between constant voltage charging and current limiting during charging phases. When the charging process reaches a predetermined current threshold, the method stops charging and transitions to constant voltage charging. This approach ensures safe charging while maintaining the charging rate.

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Control method for battery pack equalization charging that ensures uniform charging across the pack. The method employs a diode-based charging and discharging circuit with unidirectional conduction paths, where charging and discharging currents flow in opposite directions. This configuration prevents battery voltage differences from accumulating during charging and discharging cycles. The method integrates a remote control system that enables real-time monitoring and automated charging adjustments to maintain consistent battery state.

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Optimizing lithium iron phosphate battery floating charge through a three-stage charging and discharging strategy. The method involves alternating between deep discharge, constant current charging, and constant voltage charging phases during the floating charge cycle. This approach ensures the battery maintains optimal state of charge while preventing excessive depth of discharge and overcharging.

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