Motorcycle Battery Charger

Ordinary car battery chargers are simple and inexpensive devices that continuously charge the battery with a pace few amps, for the time the device is ON. If the holder does not close in time the charger, the battery will overcharge and electrowinning capacity will be lost by evaporation or likely to be destroyed elements. The charger circuit overcomes these defects. Electronically controls the battery charge and has a feedback control circuit, causing the battery to charge a maximum rate until fully charged. When fully charged, lights up a red Led (LD2).

The charger is designed to charge batteries of 12V, only. What should be paid by whom built the circuit, are the cables connecting the transformer to the circuit and then the battery should be high profile, so that heat when it passes through the current load and also not cause voltage drop in the path of current through them.

Motorcycle Battery Charger Circuit Diagram

motorcycle-battery-charger-circuit diagram

When construction is finished turn the TR1 in place zero value, then the following settings-control.

  1. Check without connecting the battery, that both LED’s light up.
  2. Connect a car battery charger. Check that the LD2 is off and that a current (typically 2 until 4 A), flows to the battery.
  3. Turn the TR1 and check that the LD2 can turn and charge current to cut
  4. Turn the TR1 to null value and charge the battery using the standard technique hydrometer (if not available, use a battery in good condition and fully charged).

Turn carefully so that the TR1 LD2 begins to turn and charge current drops to a few hundred mA. If TR1 installed correctly then the next load will see the first LD2 will start to flicker, and charging the battery. When fully charged the battery then the LD2 will turn on fully.

To TR1 no longer needs another adjustment. The Q1 is connected in series with the circuit of the battery and can be fired from the circuit R3-4 and LD2. The battery terminal voltage is obtained from the circuit R2, C1, TR1, D2 and activates the Q2 when the voltage terminals exceeds the value we are striving to TR1.

When an uncharged battery put on charge the terminal voltage is low. under this situation the Q2 turn off and Q1, fired in each half cycle of the circuit R3-4, LD2. The Q1 functions as a simple rectifier. While charging the battery, the terminal voltage increases. If the terminal voltage rises above the level that we have set to TR1, then shifts the Q2 gate drive of Q1, it turns off, stop giving power to the battery and lights LD2, showing us that the loading is complete. The Q1 and the bridge rectifier GR1, should be placed on a good heatsink for proper cooling. The M1 is an ammeter DC 5A, so we can monitor the charging current. Optionally can be placed a voltmeter in parallel with the poles of the battery should have high input impedance, however, not affect the circuit measuring device.

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