Fast Charging Techniques for LFP Batteries in EVs

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 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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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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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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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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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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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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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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Enhancing battery charging efficiency by dynamically adjusting charging current levels during the charging process. The method monitors the battery's state-of-charge and voltage to prevent overcharging, particularly in aged batteries with increased internal resistance. It adjusts the charging current during the initial charging phase to maintain a stable voltage level, ensuring safe and efficient charging. This approach enables faster charging while minimizing the risk of premature battery failure.

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A charging method for lithium iron phosphate (LiFePO4) batteries that addresses the challenges of charging series-connected LiFePO4 cells. The method employs a dual-stage charging approach: a constant current charging phase followed by a second constant voltage charging phase. During the second phase, the charger maintains the battery at a constant voltage until the desired voltage level is reached, providing a more stable charging environment compared to traditional constant current charging. This approach effectively addresses the unique charging characteristics of LiFePO4 cells, particularly the voltage-dependent charging behavior, and enables extended battery life through improved charging conditions.

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A method to improve the cycle life of lithium iron phosphate power lithium batteries through optimized charging strategies. The method involves a two-step charging process: first charging at high current levels to platform voltage, followed by a controlled discharge to charge cut-off voltage. This approach reduces the peak current stress during charging while maintaining the battery at a stable state of charge, thereby preserving the battery's internal resistance and preventing polarization.

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A lithium iron phosphate battery charging system that optimizes charging efficiency and safety. The system employs a single-ended converter with built-in voltage regulation, enabling precise control over charging currents. The converter's voltage regulation is achieved through a combination of a voltage reference and a current sensing circuit. This enables the system to dynamically adjust charging rates based on battery state-of-charge, preventing overcharging and maintaining optimal battery health. The system also incorporates safety features such as automatic voltage limit protection and overcharge detection, ensuring reliable and environmentally friendly charging of lithium iron phosphate batteries.

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Battery charging control method and apparatus that dynamically adjusts charging current based on battery voltage levels during charging. The method monitors battery voltage and determines the optimal charging current according to the current voltage level, enabling controlled charging while preventing rapid voltage drops that can cause anode damage. The control method continuously monitors battery state and adjusts charging parameters in real-time to maintain optimal charging conditions.

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A charging method for rechargeable batteries that enables faster charging while maintaining safety. The method involves dynamically adjusting the charging current based on the battery's state of charge, transitioning from the CC charging mode to CV mode when the battery reaches 60% capacity. During CV mode, the charging current is gradually reduced to maintain the target voltage, preventing excessive current peaks that can cause pressure drops. This controlled current management enables faster charging while ensuring the battery's internal resistance is maintained, reducing charging times and improving overall efficiency.

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A charging and discharging control system for electric vehicles that optimizes battery management while maintaining safety. The system detects the screw tightening degree of the battery module during charging and discharging operations, automatically adjusting the charging rate to prevent overcharging or over-discharging of individual battery cells. This ensures consistent battery performance and prolongs their lifespan by preventing premature degradation from rapid charging or discharging.

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Power supply device that dynamically adjusts charging current based on battery voltage during charging, enabling efficient power delivery while maintaining battery health. The device monitors the charging current and voltage levels, automatically adjusting the charging current to maintain optimal charging efficiency while preventing overcharging. This approach enables the device to optimize charging current based on the battery's actual state, rather than relying on traditional fixed current levels.

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A charging method that improves charging efficiency by first charging the battery to a predetermined voltage level, then gradually increasing the charging current while monitoring the battery's voltage. The charging process is optimized by continuously adjusting the charging current based on the battery's voltage response, allowing the battery to reach its full charge potential.

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