| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately diagnose the deteriorating degree of a battery. <P>SOLUTION: A control device of a motor-operated vehicle includes the battery, and a motor receiving a power from the battery for driving the vehicle and regeneratively generating to supply a power to the battery. The control device judges a plurality of I/O patterns in which at least one of an I/O power or an I/O time of the battery is different (S1). When the I/O in response to the judged specific I/O pattern (a) is finished, current Ia, a voltage Va and SOC (state of change) of the battery at its ending time are detected (S5, S6), an internal resistance value Ra is calculated based on these detected values (S7), an internal resistance deterioration coefficient Ka is obtained based on this Ra (S9), and the deteriorating degree of the battery is diagnosed based on this Ka (S10). <P>COPYRIGHT: (C)2004,JPO |
