LI-ION BATTERIES PROTECTION CIRCUIT

Abstract

In today's landscape, reversible batteries play a crucial role in energy storage and management. However, one significant challenge associated with these batteries is the risk of overcharging and over-discharging. In our paper, we propose a zener diode-based circuit designed to protect lithium-ion batteries from over-discharging. When a lithium-ion battery is fully charged, the terminal voltage—the voltage between the anode and cathode reaches its peak value, indicating a full charge. As the battery discharges while connected to a load, this terminal voltage begins to drop. Monitoring the terminal voltage is essential, as it directly correlates with the battery's state of charge. To address the risk of over-discharging, we propose a protection circuit that continuously monitors the battery's charging level. This circuit will disconnect the load when the terminal voltage falls below a predetermined threshold, thus safeguarding the battery from potential damage caused by excessive discharge. By implementing this protection mechanism, we aim to enhance the reliability and longevity of lithium-ion batteries in various applications.