Ni-Cd Battery Charger

These days many of electrical appliances (watch, RC car, radio etc) use Ni-Cd battery. Here is a simple circuit of Ni-Cd battery charger in the series of easy electronics projects.

Circuit Description and working principle of  Ni-Cd Battery Charger

Basically Circuit of Ni-Cd battery charger is rectifier. The input from AC mains is directly given to the circuit through resistors R1 and R2, where resistor R1 is used to limit the surge current and resistor R2 with capacitor C1 is used to limit the leakage charge current. The output from these resistors is rectified by bridge rectifier build using diode D1 through D4.

ni cd battery charger circuit

The output from rectifier is given to the battery charging. Three 1.5V Ni-Cd batteries are connected in series for charging. It took around 20 hour to charge 3*1.5V Ni-Cd battery.

PARTS LIST OF  Ni-Cd BATTERY CHARGER

Resistor (all ¼-watt, ± 5% Carbon)
R1 = 150Ω/1W

R2 = 470 KΩ/1W

Capacitor
C1 = 0.22 µF, 400V (Plastic Capacitor)
Semiconductors
D1 – D4 = 1N4007 (Rectifier Diode)

Check out other various battery charger circuit posted in bestengineeringprojects.com

  1. 12 V Battery Charger with overcharge and deep-discharge protecting
  2. 12v, 7Ah Smart Battery Charger with PCB Diagram
  3. Ni-Cd Battery Charger Circuit
  4. Automatic battery float charger circuit

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