Patent ID: 7224142

Claim:
A battery load power detecting system for detecting a load power of a battery connected to a load group including a steering device adapted to provide a steering torque by a motor and to a generator driven by an engine, the system comprising: a voltage sensor which detects a voltage at a terminal of the battery; a generator current sensor which detects a current supplied from the generator to at least one of the battery and the load group; a load current sensor which detects a current supplied from at least one of the generator and the battery to the load group; and a battery load power calculating means for calculating a load power of the battery based on the voltage detected by the voltage sensor, the current detected by the generator current sensor and the current detected by the load current sensor, wherein the load current sensor comprises a first load current sensor which detects a current supplied from the battery to the steering device, and a second load current sensor which detects a current supplied from at least one of the generator and the battery to all members of the load group excluding the steering device, and wherein the battery load power calculating means controls an amount of power generated by the generator based on the current detected by the second load current sensor.