A protection board consists of integrated circuits (ICs), metal-oxide semiconductors (MOS) switches, capacitors, resistors, negative temperature coefficient thermistors (NTCs), positive temperature co. The main function of the protection board is to monitor the state of charge (SoC),. All lithium battery cells, BMS, and protection boards undergo certification. UN/DOT 38.3.5 involves the shipping and transportationof lithium batteries. Other certifications incl. All lithium batteries must have a protection board or BMS connected to the battery cells. The customer must also obtain certification for the cell and BMS system. Keep in mind tha.