I am trying to better understand the sequence of events that occur for low cell voltage cutoff with regard to the ATD relay and the main contactor.
On the one hand, the manual says:
If the cell voltage gets too low and has reached the low cell voltage threshold, the ATD contact opens and turns off all loads. If the Lynx Smart BMS is connected to a GX device, DVCC compatible inverters connected to the same GX device are also turned off. After 5 minutes without sufficient charge voltage on the system side of the BMS, it will shut down.
However, on another corner of the Internet, I found this:
The contactor in the BMS is triggered to open (cut off power) when the battery cell voltage (there are many cells in each battery that generate the nominal 12 volts) reaches 2.6 volts (a deeply discharged battery bank). Meanwhile the ATD relay would open at the slightly higher battery cell voltage of 2.8 volts. Thus, by wiring up your ATD to something like a Smart BatteryProtect, you can stagger the system shutdown so that you can turn off many of your “non-essential” loads (those connected via a Smart BatteryProtect) prior to the entire system being disabled.
For me the latter quote would make the most sense from a design perspective.
How exactly does it behave? Does everything shutdown (contactor opens) regardless after 5 minutes without a charge voltage as the former quote from the manual suggests?
