Homemade 12v battery charger

intelligent automatic charger low loss and high efficiency. It is suitable for charging 12V and 24V batteries. The charger also has anti-reverse connection function. If it is not connected or reverse polarity, there is no voltage output. Only the correct connection can work normally. It also has protection against overvoltage, overcurrent and overheating.

The principle of charging is that the voltage of the charger is higher than the voltage of the battery, so that the electric potential difference between the two is larger, the charging is faster, the charging current is larger, so the voltage of the general 24V charger is the largest (no load). It is 28V, and 60A is the output current capability of full load. When you charge, the charger already has load. At this time, the voltage is the voltage that the battery is charging. The current of 40A is the charging current. This current will follow. The completion of charging is getting smaller and smaller. In addition, the magnitude of the charging current is also related to the size of the battery.

Homemade 12v battery charger

Homemade 12v battery charger

Tools/raw materials

Wire

Transformer

High power rectifier diode

Capacitor

Switch and plug

Method / Step 1

1, the most before this, first need a 12v charger circuit diagram, according to the drawings can be clear ideas, convenient and quick to start production.

Homemade 12v battery charger

2, prepare the required production materials, first need an output AC 12V5-15A AC transformer, 1 6-10A high power rectifier diode, 25V2200uf capacitor tube, low voltage power control switch 1, 220V power plug 1 , 1 roll of insulating tape. In addition, it is required to have a diameter larger than the diameter of the high-power rectifier diode 0.3cm30-50cm rubber hose (water leakage type, rectifier diode cooling), 1 plastic empty bottle (for rectifier diode cooling)

Homemade 12v battery charger

Method / Step 2

1. Connect the 220V power plug and the transformer input end with wires, and wrap the connector with insulating tape. Because the AC power supply has no positive and negative poles, the input end is connected casually, but the input end and the output end must not be mistaken. The input and output on the transformer must be clearly seen.

Homemade 12v battery charger

2. Connect the ends of the rectifier diodes with the same length of wire, but the total length should exceed the length of the 30-50cm rubber hose, and then one end passes through the 30-50cm rubber hose, so that the rectifier diode is in the rubber hose. centre position.

Homemade 12v battery charger

3. Connect one wire of the transformer 12V output terminal and the positive (or negative) terminal of the rectifier diode with wires and wrap the connector with insulating tape.

Homemade 12v battery charger

4. Connect the other line of the transformer 12V output terminal to the positive (or negative) terminal of the capacitor tube. The negative (or positive) terminal and the negative (or positive) terminal of the rectifier diode are connected by wires, and the connector is wrapped with insulating tape. it is good.

Homemade 12v battery charger

5. Connect the positive and negative ends of the capacitor tube to the wires (lead wire, that is, the wire at both ends of the battery). Connect the low-voltage power control switch to the positive terminal and connect the wire to the negative terminal. Then connect the connector with insulating tape. Pack it out.

The page contains the contents of the machine translation.