| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately detect charging and discharging currents and the like of a battery, without being affected by the temperature of an environment where a current sensor is used. SOLUTION: A current sensor 40 measures the value of a current that flows in a controlled load 30 connected to a battery 10 via a relay 20, and a temperature sensor 50 measures the temperature of the environment in which the current sensor 40 is used. A temperature-offset map that represents the relation of the temperature of the operational environment of the current sensor 40 to an offset value is stored in a microcomputer 81. Based on the temperature-offset map, an offset value is calculated that corresponds to the detection result of the temperature sensor 50, then the offset value calculated corrects the current value detected by the current sensor 40.</p> |
