Battery Overcharge Protection DIY

Introduction

Overcharging a battery can cause it to become damaged or even explode, so it’s important to have a protection circuit to prevent this from happening.

A Battery Overcharge Protection DIY is a device that protects a battery from being overcharged by preventing the voltage from exceeding a certain threshold. Overcharging a battery can lead to significant damage, reducing its lifespan and potentially causing it to become unstable or even explode.

The protection circuit is typically composed of several components, including a voltage reference, a comparator, a transistor, and a resistor. The voltage reference sets the threshold voltage, which is the maximum voltage that the battery should be charged to. The comparator compares the battery voltage to the threshold voltage, and if the battery voltage exceeds the threshold, the comparator triggers the transistor to turn off and disconnect the battery from the charging source.

In the following video, I have made an automatic 12V Battery Overcharge Protection DIY circuit. With this circuit, we can charge a 12v battery safely.

Battery Over Charge Protection DIY Thumbnail

In addition to protecting the battery from overcharging, the protection circuit also prevents over-discharging, which can also damage the battery. When the battery voltage drops below a certain threshold, the protection circuit will disconnect the battery from the load to prevent further discharge.

Overall, a battery overcharge protection circuit is an essential component in many battery-powered devices to ensure the safe and long-lasting operation of the battery.

Circuit Diagram

of Battery Over Charge Protection

**Battery Over Charge Protection DIY Circuit Layout**

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**Battery Over Charge Protection DIY Circuit Diagram**

Working Explanation

Complete your battery overcharge protection circuit according to the above circuit diagram. When the battery voltage exceeds the Zener voltage, the transistor will turn on and the LED will light up, indicating that the battery is fully charged. You can adjust the Zener voltage by using a different value Zener diode to match the maximum charging voltage of your battery.