Lynx Smart BMS How to manually switch device modes 7.4. Lynx Smart BMS trigger This section describes the behavior of the Lynx Smart BMS in case the pre-alarm threshold is reached or either a low or high cell voltage or low temperature event is triggered. The limits for the pre-alarm threshold, low cell voltage and low temperature are set in the battery. Pre-alarm If a cell voltage drops and reaches the pre-alarm threshold, the programmable relay will activate, if configured to Alarm relay mode. This will give an advanced warning of an impending low cell voltage and before the loads are disabled. Pre-alarm is indicated by the red LED flashing 3 times every 4 seconds.
The Lynx Smart BMS ensures a minimum delay of 30 seconds between enabling the pre-alarm and switching off the loads. Low cell voltage cut off 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.
Low temperature or high cell voltage cut off If a cell voltage becomes too high and has reached the high cell voltage threshold (3.75V hard coded in battery), or if the low temperature threshold (adjustable in battery) has been reached, the ATC contact opens and will turn off all chargers. If the Lynx Smart BMS is connected to a GX device, DVCC compatible chargers that are connected to the same GX device will be turned off as well. 7.5. Battery monitor operation The Lynx Smart BMS has a built-in battery monitor. It measures battery voltage and current.
Based on these measurements it calculates state of charge, time to go and keeps track of historical data, such as deepest discharge, average discharge and number of cycles. 7.6. Battery care Once the Lynx Smart BMS is in operation, it is important to take care of the batteries. These are the basic guidelines: Avoid total discharge of the battery at all times and use the discharge floor setting to prevent this. Familiarize yourself with the pre-alarm feature and act when pre-alarm is active to prevent a DC system shutdown. Charge your batteries as soon as possible when the pre-alarm is active or the BMS has deactivated loads.
Minimize the time the batteries spend in a deeply discharged state as much as possible. The batteries need to spend at least 2 hours in absorption charge mode each month to ensure sufficient time in balancing mode. When leaving the system unattended for some time, make sure to either keep the batteries charged during that time or make sure the batteries are (almost) full and then disconnect the DC system from the battery. Do this by disconnecting the positive battery pole.
Commissioning and Operation of the Lynx Smart BMS Page 24 Mode Soft switch VictronConnect app Soft switch GX device Hard wired Remote on/off switch ON Yes Yes* Yes Standby Yes Yes No OFF Yes No Yes * Only possible from Standby mode