Abstract
Lithium-ion (Li-ion) batteries have emerged as a primary secondary power source for portable systems. Their notable advantage lies in their ability to be recharged numerous times before disposal, offering a clean energy source devoid of toxic elements. However, charging these batteries requires careful consideration. Fast charging or overcharging can elevate battery temperature, potentially leading to explosions and accidents. Various charging methods exist, but the Constant Current-Constant Voltage (CC-CV) approach stands out as particularly suitable for Li-ion batteries due to its ability to prevent critical overcharging. This paper introduces a Li-ion battery charger circuit leveraging an 89S52 microcontroller. The charger employs the CC-CV method to achieve a full charge for the battery.
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