BMS vs PCM
Lithium cells are all requiring a safety circuit in order to protect the cells from overload
Overloading lithium cells can in worst case lead to fire or explosion - please refer for further information on the mandatory UN38.3 transportregulation here.
Generallly Lithium cells must be protected from
Over discharge (discharging under minimum specified voltage - which compromises lifetime)
Over charge (too high charge voltage - which can compromise safety in the cell and lifetime)
Over temperature (too high cell temperature - causes reduced lifetime)
To protect the cells, a PCB, typically called a PCM or a BMS is installed between the cells and the charger/application.
A PCM - protection circuit module - is typically a PCB with basic protection
A BMS - battery management system - is more advanced, often including cell balancing, additional safety measures and fuelgauging.
At AWILCO we would be pleased to discuss the pro's and the con's when selecting a protection module for your battery - please do not hesitate to contact us.
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