Abstract: A battery system in an electric vehicle includes: a main battery; a battery management device that controls power supply from the main battery to be blocked when an abnormality has occurred in one or more components included in the electric vehicle; and an auxiliary battery provided separately from the main battery and that supplies power to one or more components provided in a cooling system that cools the main battery.

Abstract: Discussed is a battery system applied to an electric vehicle. The battery system can include: a battery pack including a plurality of battery cells; a battery management system configured to obtain information on the battery pack, and manage the battery pack based on the obtained information; and a battery black box configured to, while the electric vehicle is turned off, supply a power voltage to the battery management system, and store battery pack management information generated by the battery management system. The battery pack management information may include information on at least one of a plurality of cell voltage of the plurality of battery cells, a current and a temperature of the battery pack, and an insulating resistance of the battery pack.

Abstract: A low voltage cell detecting method and a battery management system includes a cell monitoring IC connected to respective ends of a plurality of battery cells and measuring a cell voltage and a battery current of the respective battery cells, and a main control circuit for calculating states of charge (SOCs) of the respective battery cells based on at least one of the measured cell voltages and the battery currents of the battery cells. The main control circuit compares a difference value between first SOCs of the battery cells calculated before a service of a vehicle terminates and second SOCs of the battery cells calculated when the service of the vehicle resumes to a predetermined discharging threshold value, determines whether the battery cells respectively have a low voltage according to the comparison, and detects a low voltage cell.

Abstract: A low voltage cell detecting method and a battery management system includes a cell monitoring IC connected to respective ends of a plurality of battery cells and measuring a cell voltage and a battery current of the respective battery cells, and a main control circuit for calculating states of charge (SOCs) of the respective battery cells based on at least one of the measured cell voltages and the battery currents of the battery cells. The main control circuit compares a difference value between first SOCs of the battery cells calculated before a service of a vehicle terminates and second SOCs of the battery cells calculated when the service of the vehicle resumes to a predetermined discharging threshold value, determines whether the battery cells respectively have a low voltage according to the comparison, and detects a low voltage cell.