CURRENT MEASUREMENT APPARATUS CURRENT MEASUREMENT METHOD AND BATTERY PACK INCLUDING THE CURRENT MEASUREMENT APPARATUS

摘要

Provided are a current measurement apparatus, a current measurement method, and a battery pack including the current measurement apparatus. The current measurement apparatus comprises: a switching circuit installed on a charge/discharge path for a battery; a current measurement unit including a shunt resistor element disposed on the charge/discharge path and configured to output a current signal corresponding to a voltage across both ends of the shunt resistor element; a voltage measurement unit configured to measure a voltage across the switching circuit; a temperature measurement unit configured to measure the temperature of the switching circuit; and a control unit. The control unit determines a first current value representing a current flowing through the shunt resistor element based on the current signal. The control unit determines a second current value representing a current flowing through the switching circuit based on the measured voltage and the measured temperature. The control unit determines whether the shunt resistor element is in a normal state based on the first current value and the second current value. Without an additional current sensor, it can be diagnosed whether the shunt resistor element installed on the charge/discharge path for the battery is in a normal state.