Victron Energy BMS 12/200 Management System

VICTRON Lithium Iron Phosphate Batteries § VICTRON lithium iron phosphate (LiFePO4 or LFP) batteries feature integrated cell balancing and monitoring. Up to ten batteries can be connected in parallel and up to four in series, allowing a battery bank of 48 V and 3000 A h maximum. The cell balancing/monitoring cables can be daisy-chained and must be connected to a Battery Management System (BMS). Battery Management System (BMS) The BMS connects to the BTVs and performs the following key functions: 1 - Disconnects or turns off the load whenever the voltage of a battery cell drops below 2.5 V. 2 - Stops the charging process whenever the voltage of a battery cell rises above 4.2 V. 3 - Shuts down the system whenever the temperature of a cell exceeds 50 C. 4 - Performs cell balancing. 5 - BMS provides up to 200 A with any DC load (including inverters and inverter/chargers). 6 - Additional functions can be integrated: see the specific BMS datasheets. Advantages: 1) Lithium iron phosphate (LiFePO4 or LFP) batteries are the safest of traditional lithium-ion batteries. The nominal voltage of an LFP cell is 3.2 V (lead acid: 2 V/cell). A 12.8 V LFP battery therefore consists of 4 cells connected in series. A 25.6 V battery, on the other hand, consists of 8 cells connected in series. 2) Up to 70% less space and weight than traditional batteries. 3) A lead-acid battery fails prematurely due to sulfation if: it is operated for long periods of time in deficit mode (i.e., the battery is rarely, if ever, fully charged). it is left partially charged or, worse still, completely discharged. An LFP battery does not need to be fully charged. In the case of a partial charge, the service life actually increases slightly compared to a full charge. This is one of the main advantages of LFP batteries over lead-acid batteries. 4) Other advantages include the wide operating temperature range, excellent charging cycle performance, low internal resistance, and high efficiency (see below). § Description, BMS Management System, mm, 65x120x260, 1.8