Efficient Li-ion Battery Charging: Mitigating Temperature Rise for Longer Cycle Life
Keywords:
Adaptive Charging Strategies (ADC), Electric Vehicle (EV), Fuzzy Temperature Rise Control (FTC), Solid Electrolyte Interface (SEI), Synchronous chargingAbstract
Currently, electric vehicles and portable electronics are rapidly growing technologies in the automobile industry. The demand for lithium-ion batteries, which can charge quickly, safely, and efficiently, is high due to the fast growth in EVs and portable electronics. However, the long charging time and thermal management during fast charging lead to major issues. The Constant-Current–Constant-Voltage (CC-CV) method is most commonly used, with certain issues like overheating, creating uneven current flow, and damaging the battery. To overcome these challenges, this study presents an adaptive charging strategy that integrates the unused battery capacity charging scheme with A Fuzzy Temperature-Rise Control (FTC) mechanism. The system continuously monitors the battery’s unused state of charge and temperature. Based on the unused charge, the charging current is gradually reduced as the battery approaches full capacity to avoid overcharging. At the same time, a fuzzy logic-based temperature control adjusts the charging current according to the temperature rise and its rate of change to prevent overheating. By combining both controls, the system provides a safe and automatically regulated charging current. This study presents the MATLAB simulation of a charging and discharging system used in a lithium-ion battery with a DC source and a Simulink model of the battery when connected to a resistive load. The obtained simulation results have been presented and discussed in this study.
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