Abstract: A battery management apparatus according to an embodiment can include a plurality of balancing resistors respectively connected to a plurality of battery cells, a common resistor connected in parallel to the plurality of balancing resistors, a plurality of resistive switches connected between the plurality of balancing resistors and the common resistor, and a controller for calculating balancing times of the plurality of battery cells and control operations of the plurality of resistive switches based on the balancing times.

Abstract: Disclosed is a method and a battery management system for calibrating a state of charge of a battery. The method includes measuring a terminal voltage and a current of the battery, storing a measured voltage value indicating the terminal voltage and a measured current value indicating the current in a memory, updating a state of charge of the battery based on the measured current value, estimating an open-circuit voltage of the battery based on a first number of measured voltage values and a first number of measured current values in the order stored in the memory, storing an estimated voltage value indicating the open-circuit voltage in the memory, and calibrating the updated state of charge with a reference state of charge when a calibration condition is satisfied by a data set in which a second number of estimated voltage values sequentially stored in the memory are arranged in sequential order.

Abstract: Disclosed is a method and a battery management system for calibrating a state of charge of a battery. The method includes measuring a terminal voltage and a current of the battery, storing a measured voltage value indicating the terminal voltage and a measured current value indicating the current in a memory, updating a state of charge of the battery based on the measured current value, estimating an open-circuit voltage of the battery based on a first number of measured voltage values and a first number of measured current values in the order stored in the memory, storing an estimated voltage value indicating the open-circuit voltage in the memory, and calibrating the updated state of charge with a reference state of charge when a calibration condition is satisfied by a data set in which a second number of estimated voltage values sequentially stored in the memory are arranged in sequential order.

Abstract: Apparatus and method for diagnosing a current sensor serially connected to a battery module having at least one secondary battery, including a measuring unit connected to both ends of at least one secondary battery and both ends of the battery module to measure voltages, and connected to both ends of the current sensor to measure current flowing through, and a control unit including a first deviation checking part checking a first voltage deviation between the voltage at both ends of each secondary battery at first and second times by setting a time difference, a second deviation checking part summing the voltages at both ends of each secondary battery and checking a second voltage deviation between the summed voltage and the voltage at both ends of the battery module, and a diagnosing part diagnosing whether the current sensor is in an open circuit state using the first and second voltage deviations.

Abstract: Apparatus and method for diagnosing a current sensor serially connected to a battery module having at least one secondary battery, including a measuring unit connected to both ends of at least one secondary battery and both ends of the battery module to measure voltages, and connected to both ends of the current sensor to measure current flowing through; and a control unit including a first deviation checking part checking a first voltage deviation between the voltage at both ends of each secondary battery at first and second times by setting a time difference, a second deviation checking part summing the voltages at both ends of each secondary battery and checking a second voltage deviation between the summed voltage and the voltage at both ends of the battery module, and a diagnosing part for diagnosing whether the current sensor is in an open circuit state using the first and second voltage deviations.