Battery Cut Out Relay

A simple cut out relay is as shown in the figure.

Battery cut out relay. Further reducing relay coil power. When the generator is producing sufficient voltage so that the field due to both the current and voltage coils support each other the electromagnet pulls down the armature the contacts are closed and the generator battery circuit is. The circuit responds cutting off when the voltage of the batteries goes below 22v and rearms at around 23v actually the batteries serial voltage is around 24v as i have 3 power diodes in series with the input which reduce the measured voltage at the zener in 2v approx. Also when the relay drops out the control circuit current drops to about 4ma thus minimizing battery drain.

Adding two common components reduces the relay coil voltage and current to 70. The inverter puts out up to 100 amps to charge my batteries. Hi iceng i am implementing this circuit with a 22vz zener to cut off two serial 12v lead batteries. A battery disconnect switch makes this easy by allowing you to disconnect the battery without any tools.

Use of diode d3 as internally the relay has an inductor coil this coil stores some charge when the relay gets activated or energized. Simply flip the battery disconnect switch and the flow of current from your battery will be shut off. To further reduce the relay coil current i employed a relay economy technique described in a previous post. I had to cut two traces one.

Therefore the battery will cut off when the battery voltage of each li ion battery is at 4 2 v approximately. The electromagnet consists of 2 coils shunt and the series. A battery disconnect switch is also a great tool for cars that you only take out on special occasions. As an experiment to turn on a genset to turn on a generator and the generator and inverter takes care of charging my battery bank.