VEHICLE POWER SOURCE CONTROLLING METHOD, VEHICLE POWER SOURCE CONTROLLING DEVICE, AND VEHICLE POWER SOURCE CONTROLLING PROGRAM

摘要

PPROBLEM TO BE SOLVED: To provide a vehicle power source controlling method and a vehicle power source controlling device capable of discriminating the deterioration in a secondary battery accurately and easily. PSOLUTION: A measuring part 31 measures the discharging current and voltage and temperature of a vehicle power source 5 by an ammeter 4, a voltage sensor 5, and a temperature sensor 7 while a vehicle is stopped at the prescribed time when an engine reaches the prescribed number of revolutions from its start. A calculating part 32 calculates the internal resistance of the vehicle power source 5 using the results of the measurements, and corrects the calculated resistance by capacity and temperature. A discriminating part 33 discriminates the deterioration state of the vehicle power source 5 based on the resistance obtained and corrected by the calculating part 32. PCOPYRIGHT: (C)2004,JPO