Victron Smart bms 12/200 battery management system

The Smart bms 12/200 from Victron Energy (mpn bms210055000) for smart Victron lithium iron phosphate (LiFePO4) batteries is specifically designed for 12v systems with a 12v alternator. It combines a current limiter, battery coupler and battery monitor in a robust and compact solution. The Smart bms 12/200 monitors and protects each battery cell individually within the battery (or battery bank) and disconnects from the alternator, charging sources or DC loads in the event of low/high battery voltage or over temperature.
The dedicated alternator connection provides current limiting and one-way traffic from the alternator to the battery, allowing alternators of any size (and starter batteries) to be safely connected to the Smart Lithium battery and protecting the starter battery from excessive discharge. The bms is equipped with Bluetooth for monitoring and configuration, a remote on / off port to turn off the bms (and the system) via a switch and a pre-alarm contact and give a warning signal u before the bms disconnects the connection between the battery and the system.

Features

• Protection of the starter battery
• Alternator and battery protection
• Load / battery charger output / input (power supply socket SYSTEM+)
• Lithium-ion battery protection
• Load disconnect, pre-alarm and charge disconnect output
• Remote on/off output, also configurable as system on/off

Alternator and battery protection

The input current is electronically limited to approx. 90% of the fuse value. A 100a fuse, for example, therefore limits the input current to about 90a. Choosing the right fuse will help protect the LFP battery from excessive charging current (important in the case of a low capacity LFP battery). It also protects the alternator from overloading in the case of a high capacity LFP battery bank (most 12v alternators will overheat and fail if left running at maximum output power for more than 5 minutes).

Load/Battery Charger Output/Input (SYSTEM+ Power Supply Bay)

this power supply jack can be used to either charge or discharge the LFP battery (i.e., via a charger or inverter) with a maximum continuous current of 200a in either direction. Can also be used as a load output, allowing DC loads to be connected directly to this connector. The connection is short circuit proof with a peak discharge current of 400a. The smart bms ensures that battery discharge is disabled when cell undervoltage is imminent. It allows charging via this port, but no charging algorithm can be applied internally.

Lithium-ion battery protection

excessive input voltages and transients are regulated down to a safe level. The smart bms stops charging in case of cell overvoltage or overtemperature. It has three outputs: /p>

• Load disconnect output: The load output can be used to control the remote on/off of a battery protector, inverter, DC/DC converter or other loads.
• Pre-alarm output: The pre-alarm output can be used as a warning when the battery voltage is low and it will trip just before the load disconnect output is deactivated due to cell undervoltage. It can be used to control a relay, led or buzzer. It can be configured as a continuous or intermittent signal.
• Charger disconnect output: The charger output is normally high and will free float if there is a threat of cell overvoltage or overtemperature. The Charger output can be used for control to remotely turn on/off a charger, a Cyrix-Li charger relay, or a Cyrix-Li-Ct battery coupler.

A non-inverting or inverting on/off cable may be required.

Remote on/off, also configurable as system on/off

The remote on/off output controls charging via the alternator, while the bms functionality remains active regardless of the remote on/off state. The remote can also be used as a system on/off switch. This can be configured with VictronConnect.

Technical data

• Max. Charging current, alternator connection: 100a (with 125A fuse)
• Max. Charging current, connection system+: 200a
• Max. Discharge current, system+ connection: 200a
• Peak discharge current: 400A
• Input voltage to start charging: >13A
• Operating temperature range: -40°C - +60°C
• Protection class: IP65
• Weight: 2 kg
• Dimensions: 65 x 120 x 340 mm

Scope of delivery:

1x Victron Smart bms 12/200 bms210055000