VE-Bus BMS Victron

"Protects each individual cell of a Victron lithium-iron phosphate battery (LiFePO4 or LFP)"

Each individual cell of a LiFePO4 battery must be protected against overvoltage, undervoltage and overheating.
Victron LiFePO4 batteries feature load balancing, temperature and voltage control (acronym: BTV) and connect to the VE.Bus BMS with two sets of M8 circular conductors.
BTVs for several batteries can be connected in series. Up to 10 batteries can be installed in parallel, and up to 4 batteries can be connected in series (BTVs are easily connected in series), so that a 48 V battery bank of up to 2000 Ah can be assembled. Please refer to the LiFePO4 battery documentation for further details.

The BMS :

• Will
• stop or disconnect loads in the event of impending cell undervoltage;
• Will reduce charging current in the event of impending cell overvoltage or overheating (VE.Bus products only. See below);
• Will stop or disconnect battery chargers in the event of impending cell overvoltage or overheating.

Protects 12 V, 24 V and 48 V systems

BMS operating voltage range: 9 to 70 V DC.

Communicates with all VE.Bus products

The VE.Bus BMS connects to MultiPlus, Quattro or Phoenix converters with a standard RJ45 UTP cable. Other products without VE.Bus can be controlled as shown in the attached files.

Load disconnection

The load disconnect output is normally high, and becomes floating in the event of imminent cell undervoltage. Maximum current: 2 A.

The load disconnect output can be used to control

• Remote on/off of a load, and/or
• Remote on/off of an electronic charge switch (BatteryProtect)

charger disconnection

Output with charger (or alternator) disconnection is normally high, and becomes floating in the event of imminent cell overvoltage or overheating. Maximum current: 10 mA.

The charger disconnect output can be used to control

• remote on/off of a charger, and/or
• a Cyrix-Li-Charge relay and/or
• a Cyrix-Li-ct battery coupler.