| 摘要 |
<P>PROBLEM TO BE SOLVED: To sufficiently keep a distance allowed to be driven before switching from an EV mode for driving a plug-in hybrid vehicle using only a motor-generator 16 to a hybrid mode for driving the vehicle using also an engine 12. <P>SOLUTION: A motor-generator 16 is connected to a high-voltage battery 26 via an inverter 22. A status of the high-voltage battery 26 is quantified by a control device 40. Specifically, the control device 40 quantifies internal resistance R as a deterioration status of the high-voltage battery 26, The control device 40 determines, as a lower limit charge ratio of SOC, the SOC at the time of a terminal voltage of a high-voltage battery 24 indicating a lower limit voltage when the high-voltage battery 24 outputs a predetermined voltage at a lower SOC than the present state on the basis of the internal resistance, and sets a threshold for switching to the hybrid mode on the basis of the lower limit charge ratio. <P>COPYRIGHT: (C)2012,JPO&INPIT |
