A Battery Management System (or Battery Monitoring System or BMS) is used in at least two different ways regarding LiFePO4 battery banks:
- cell-level monitoring and cutoff for overvoltage or undervoltage; these are intended to maintain balance between cells of fast, high-current charging, as found in electric vehicles (EVs).
- bank-level monitoring and High Voltage Disconnect and Low Voltage Disconnect.[1]
In an an RV these would be accomplished by the charge controller and an LVD respectively. This simple approach is advocated by T1 Terry, who believes the cell-level BMS is an unneeded expense for Fractional C charging and can do damage by poor design[2] or failure.
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