BATTERY MANAGEMENT SYSTEM CAPABLE OF TRANSMITTING SECONDARY PROTECTION SIGNAL AND DIAGNOSTIC SIGNAL USING FEW INSULATION ELEMENTS

Disclosed is a battery management system for transmitting a secondary protection signal and a diagnosis signal using a small number of insulation elements. N battery management units included in the battery management system transmit at least two pieces of data via one communication line through time division. N data signals transmitted from the N battery management units are transmitted in a sequential order or are mixed to one signal and transmitted to an external device.