Battery Management Systems (BMS)

Display: 1-4 from 4 products

1
Victron Energy VE.Bus BMS
  • Brand: Victron Energy

The VE.Bus BMS protects each individual cell of a Victron lithium-iron-phosphate (LiFePO4 or LFP) battery.
Each individual cell of a LiFePO4 battery must be protected against over voltage, under voltage and over temperature. Victron LiFePO4 batteries have integrated Balancing, Temperature and Voltage control (acronym: BTV) and connect to the VE.Bus BMS with two M8 circular connector cord sets.The BTVs of several batteries can be daisy chained. Please see our LiFePO4 battery documentation for details. 

The BMS will:
Shut down or disconnect loads in case of imminent cell under voltage.
Reduce charge current in case of imminent cell overvoltage or over temperature (VE.Bus products only, see below).
Shut down or disconnect battery chargers in case of imminent cell overvoltage or over temperature.

Protects 12V, 24V and 48V systems

The operating voltage range of the BMS: 9 to 70V DC.

Communicates with all VE.Bus products

The VE.Bus BMS connects to a MultiPlus, Quattro or Phoenix inverter with a standard RJ45 UTP cable.

Other products, without VE.Bus can be controlled as shown below:

Load Disconnect

The Load Disconnect output is normally high and becomes free floating in case of imminent cell under voltage. Maximum current: 2A.

The Load Disconnect output can be used to control

  • the remote on/off of a load, and/or
  • the remote on/off of an electronic load switch (Battery Protect)

Charge Disconnect

The Charge Disconnect output is normally high and becomes free floating in case of imminent cell over voltage or over temperature. Maximum current: 10mA.

The Charge Disconnect output can be used to control

  • the remote on/off of a charger and/or
  • a Cyrix-Li-Charge relay and/or
  • a Cyrix-Li-ct Battery Combiner
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121.93 EUR VAT included
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2
Victron Energy Mini BMS
  • Brand: Victron Energy

The miniBMS can replace the VE.Bus BMS in several applications. It is however not suitable for use with VE.Bus MultiPlus and Quattro inverter/chargers: it has no VE.Bus interface. The miniBMS is intended for use with Victron Smart LiFePo4 batteries with M8 circular connectors. 

The miniBMS has two outputs, similar to the VE.Bus BMS. 

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50.80 EUR VAT included
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3
Victron Energy Battery Management System BMS 12/200
  • Brand: Victron Energy

Why a Battery Management System (BMS) is needed:

  • A LFP cell will be damaged if the voltage over the cell falls to less than 2,5V.
  • A LFP cell will be damaged if the voltage over the cell increases to more than 4,2V. Lead-acid batteries will eventually also be damaged when discharged too deeply or overcharged, but not immediately. A lead-acid battery will recover from total discharge even after it has been left in discharged state during days or weeks (depending on battery type and brand).
  • The cells of a LFP battery do not auto-balance at the end of the charge cycle. The cells in a battery are not 100% identical. Therefore, when cycled, some cells will be fully charged or discharged earlier than others. The differences will increase if the cells are not balanced/equalized from time to time. In a lead-acid battery a small current will continue to flow even after one or more cells are fully charged (the main effect of this current is decomposition of water into hydrogen and oxygen). This current helps to fully charge other cells that are lagging behind, thus equalizing the charge state of all cells. The current which flows through a fully-charged LFP cell however, is nearly zero, and lagging cells will therefore not be fully charged. Over time the differences between cells may become so extreme that, even though the overall battery voltage is within limits, some cells will be destroyed due to over- or under voltage.
  • Efficient In several applications (especially off-grid solar and/or wind), energy efficiency can be of crucial importance. The round trip energy efficiency (discharge from 100% to 0% and back to 100% charged) of the average lead-acid battery is 80%. The round trip energy efficiency of a LFP battery is 92%. The charge process of lead-acid batteries becomes particularly inefficient when the 80% state of charge has been reached, resulting in efficiencies of 50% or even less in solar systems where several days of reserve energy is required (battery operating in 70% to 100% charged state). In contrast, a LFP battery will still achieve 90% efficiency under shallow discharge conditions.
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243.86 EUR VAT included
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4
Victron Energy VE.Bus BMS to BMS 12-200 alternator control cable
  • Brand: Victron Energy
VE.Bus BMS to BMS 12-200 alternator control cable
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40.64 EUR VAT included
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