3.2.3. Controlling a battery charger via Charge disconnect
• Battery chargers that are not connected to the port must interrupt the charging process in case of imminent
overvoltage or overtemperature of the cells. The Charge disconnect output of the Smart BMS can be used for this purpose.
• The Charge disconnect output is normally high (equal to battery voltage) and switches to open circuit state in case of imminent
cell overvoltage.
• Battery chargers with a remote on/off terminal that activates the charger when the terminal is pulled high (to battery plus)
and deactivates when the terminal is left free floating can be controlled directly with the Charge disconnect output. See the
for a list of Victron products with this behavior.
• Alternatively, a
Cyrix-Li-Charge
can be used. The Cyrix-Li-Charge is a unidirectional combiner that inserts in between a battery
charger and the lithium battery. It will engage only when charge voltage from a battery charger is present on its charge-side
terminal. A control terminal connects to the Charge disconnect of the Smart BMS.
3.2.4. Multiple batteries in parallel configuration
• In case of multiple batteries in parallel configuration, the two M8 circular connector cord sets of each battery must be connected
in series (daisy chained). Connect the two remaining cords to the BMS port.
Smart BMS 12-200
Page 5
Installation and configuration
