Battery Cut Out Relay

A battery disconnect switch makes this easy by allowing you to disconnect the battery without any tools.

Battery cut out relay.

A cutoff switch is installed on or near the battery and is used primarily to prevent battery charge depletion and for long term storage. Further reducing relay coil power. 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. To further reduce the relay coil current i employed a relay economy technique described in a previous post.

Hi iceng i am implementing this circuit with a 22vz zener to cut off two serial 12v lead batteries. Simply flip the battery disconnect switch and the flow of current from your battery will be shut off. Also when the relay drops out the control circuit current drops to about 4ma thus minimizing battery drain. 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 electromagnet consists of 2 coils shunt and the series. Buy battery charge controller protection switch digital display on off relay charge controller for 12v 24v battery. Use of diode d3 as internally the relay has an inductor coil this coil stores some charge when the relay gets activated or energized. A simple cut out relay is as shown in the figure.

I had to cut two traces one. Adding two common components reduces the relay coil voltage and current to 70. Therefore the battery will cut off when the battery voltage of each li ion battery is at 4 2 v approximately. The inverter puts out up to 100 amps to charge my batteries.