Patent ID: 7705556

Claim:
A vehicle control system comprising: a battery; a vehicle alternator capable of charging the battery; and a battery current detection device comprising: a battery current detecting means that detects a charging current and a discharging current of the battery; a battery voltage detection means that detects a terminal voltage of the battery; a battery temperature detection means that detects a temperature of the battery; a control means that controls the operation of the vehicle alternator based on detection results transferred from the battery current detecting means, the battery voltage detection means, and the battery temperature detection means; and a communication means that performs a digital data transmission between the vehicle alternator and the battery current detection device; and an abnormal state judgment means that judges whether or not an abnormal state of each of the battery current detecting means, the battery voltage detection means, and the battery temperature detection means has occurred, and transfers abnormal state information for informing the occurrence of abnormal state of each of the battery current detecting means, the battery voltage detection means, and the battery temperature detection means to the vehicle alternator through the communication means.