Apparatus And Method For Diagnosing Current Sensor

An apparatus for diagnosing a current sensor that is serially connected to a battery module having at least one secondary battery, the apparatus comprising:

• a measuring unit respectively connected to each of:
• both ends of at least one secondary battery;
• and
• both ends of the battery module
• to measure voltages at:
• both ends of each secondary battery;
• and
• a voltage at both ends of the battery module,
• the measuring unit being respectively connected to both ends of the current sensor to measure a current flowing through the current sensor;
• and
• a control unit including:
• a first deviation checking part for checking a first voltage deviation between (i) the voltages at both ends of each secondary battery at a first time and (ii) the voltages at both ends of each secondary battery at a second time, by setting a time difference;
• a second deviation checking part for summing the voltages at both ends of each secondary battery to calculate a summed voltage at both ends and checking a second voltage deviation between (i) the summed voltage and (ii) 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 by using the first voltage deviation checked by the first deviation checking part and the second voltage deviation checked by the second deviation checking part.