| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize the detection of the state of charging SOC of a battery which supplies power to a motor with superior response and precision, in a hybrid vehicle wherein an engine and the motor are installed as a power source. <P>SOLUTION: The state of charging SOC is updated by time duration accumulation of charge and discharge currents of the battery. On the other hand, the battery is disconnected from a motor generator at a timing of switching of charging and discharging of the battery, the state of charging SOC is estimated based on the voltage of the battery in idling by the disconnection, and the state of charging SOC by the charge and discharge currents is made to reset based on the result of the estimation. Detected result of the battery state of charging can be made to reset more frequently by an exact value while necessary power supply from the battery to the motor and necessary charging to the battery are performed. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
