Hello, i am searching for a component for my circuit.
The circuit is made of 4 dpst relay that allow me to switch from parallel to series the 3 li-ion batt (3x1cell) when a send 12V to the coils.
This works fine, however i would like to add a security beause i encounter a problem with my power supply:
When i switch off the power supply that control the coils, the voltage goes slowly from 12v to 0v. The relays triggers around 11v so they trigger one after another and this is very bad for my application (shorting the battery for a second).
However, if i unplug the cable quickly, things works fine.
So i am searching for a component that acts like a wire when there is 12v or more and and open switch for voltage <11.9v for instance
I could use one more relay to do this but i am sure there is a better solution and this is a educational project:)
I am not sure this is what a zener diode do, is it?