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The Victron VE.Bus BMS protects each cell of Victron lithium iron phosphate (LiFePO4 or LFP) batteries.
Each cell of a LiFePO4 battery must be protected against overvoltage, undervoltage and overtemperature. LiFePO4 batteries of Victron have integrated balancing, temperature and voltage control (acronym: BTV) and are connected to the VE.BUS BMS with two sets of M8 circular connector cables. Multi-battery BTVs can be connected in series.
Multi-battery BTVs can be connected in series. Up to five batteries can be connected in parallel, and up to four in series (BTVs are simply daisy-chained), so that a 48 V battery bank of up to 1500Ah can be assembled.
BMS operating voltage range: 9 to 70V DC.
The VE.Bus BMS is connected to a MultiPlus, Quattro or Phoenix inverter via a standard RJ45 UTP cable.
Other products without VE.Bus can be controlled as shown below:
The load disconnect output is usually high and switches to free float in case of imminently low voltage cells (default 3.1 V/cell, adjustable at the battery between 2.85 V and 3.15 V per cell).
Maximum current: 2 A.
The load disconnect output can be used to control:
The pre-alarm output is usually free-floating and goes high in case there are cells that are going to have an imminent low voltage (default 3.1 V/cell, adjustable on the battery between 2.85 V and 3.15 V per cell).
Maximum current: 1 A (without short-circuit protection)
The minimum delay between pre-alarm and load disconnection is 30 seconds.
The disconnect output of the charger (or alternator) is normally high and becomes floating in case of overvoltage or imminent overtemperature in the cells.
Maximum current: 10 mA.
The disconnect output of the charger can be used to control
Weight | 1 kg |
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Dimensions | 5 × 10 × 20 cm |
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