BATTERY CONTROL DEVICE AND VEHICLE SYSTEM

摘要

Provided is a battery control device capable of accurately finding a charge/discharge current. The battery control device 120 comprises a point-of-time setting unit 153 that: calculates a voltage difference dV being a calculated open-circuit voltage OCV deducted from a measured closed-circuit voltage CCV; and sets first and second points of time at which the absolute value for the voltage difference dV is no more than a prescribed value and the absolute value for the open-circuit voltage OCV difference is no more than a prescribed value. The battery control device 120 also comprises: a cumulative current calculation unit 154 that finds a cumulative current amount ∫I(t) being the cumulative time that a current flows through a single battery 111 from the first point of time until the second point of time; a current correction amount calculation unit 156 that, on the basis of the cumulative current amount and the time from the first point of time until the second point of time, calculates a current error included in a detection signal output by a current detection unit and sets the current error as the current correction amount; and a current correction unit 131 that uses the current correction amount and corrects the detection signal.